Merge release v1.1.2: UX improvements, HTTP restriction & stability fixes

Release v1.1.2: UX-Verbesserungen, HTTP-Restriktion & Stabilitätsfixes

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,152 @@
+name: 🐛 Bug Report / Fehlerbericht
+description: Melde einen Fehler in der App / Report a bug in the app
+title: "[BUG] "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Danke für deinen Bug Report! / Thanks for reporting a bug!
+        
+        Bitte fülle alle relevanten Felder aus. / Please fill out all relevant fields.
+
+  - type: textarea
+    id: description
+    attributes:
+      label: 🐛 Beschreibung / Description
+      description: Beschreibe den Fehler kurz und präzise / Describe the bug briefly and precisely
+      placeholder: "z.B. Auto-Sync funktioniert nicht mehr nach App-Update / e.g. Auto-sync stopped working after app update"
+    validations:
+      required: true
+
+  - type: dropdown
+    id: android-version
+    attributes:
+      label: 📱 Android Version
+      description: Welche Android Version verwendest du? / Which Android version are you using?
+      options:
+        - Android 14
+        - Android 13
+        - Android 12
+        - Android 11
+        - Android 10
+        - Android 9
+        - Android 8.1
+        - Android 8.0
+        - Andere / Other
+    validations:
+      required: true
+
+  - type: input
+    id: app-version
+    attributes:
+      label: 📲 App Version
+      description: Welche Version der App verwendest du? (Einstellungen → Über) / Which app version? (Settings → About)
+      placeholder: "z.B. / e.g. v1.1.0"
+    validations:
+      required: true
+
+  - type: input
+    id: device
+    attributes:
+      label: 📱 Gerät / Device
+      description: Welches Gerät verwendest du? / Which device are you using?
+      placeholder: "z.B. Samsung Galaxy S21, Google Pixel 7, etc."
+    validations:
+      required: false
+
+  - type: textarea
+    id: steps
+    attributes:
+      label: 🔄 Schritte zum Reproduzieren / Steps to Reproduce
+      description: Wie kann der Fehler reproduziert werden? / How can the bug be reproduced?
+      placeholder: |
+        1. Öffne die App / Open the app
+        2. Gehe zu Einstellungen / Go to settings
+        3. Klicke auf ... / Click on ...
+        4. Fehler tritt auf / Bug occurs
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: ✅ Erwartetes Verhalten / Expected Behavior
+      description: Was sollte passieren? / What should happen?
+      placeholder: "z.B. Notizen sollten alle 30 Min synchronisiert werden / e.g. Notes should sync every 30 min"
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: ❌ Tatsächliches Verhalten / Actual Behavior
+      description: Was passiert stattdessen? / What happens instead?
+      placeholder: "z.B. Sync funktioniert nicht, keine Notification / e.g. Sync doesn't work, no notification"
+    validations:
+      required: true
+
+  - type: dropdown
+    id: sync-enabled
+    attributes:
+      label: <EFBFBD> Auto-Sync aktiviert? / Auto-Sync enabled?
+      options:
+        - "Ja / Yes"
+        - "Nein / No"
+    validations:
+      required: false
+
+  - type: dropdown
+    id: battery-optimization
+    attributes:
+      label: 🔋 Akku-Optimierung deaktiviert? / Battery optimization disabled?
+      description: Einstellungen → Apps → Simple Notes → Akku → Nicht optimieren / Settings → Apps → Simple Notes → Battery → Don't optimize
+      options:
+        - "Ja, deaktiviert / Yes, disabled"
+        - "Nein, noch optimiert / No, still optimized"
+        - "Weiß nicht / Don't know"
+    validations:
+      required: false
+
+  - type: textarea
+    id: server-config
+    attributes:
+      label: 🌐 Server-Konfiguration / Server Configuration
+      description: Falls relevant / If relevant (KEINE Passwörter! / NO passwords!)
+      placeholder: |
+        - Server läuft lokal / Server runs locally
+        - Docker auf Raspberry Pi / Docker on Raspberry Pi
+        - Gleiche WiFi / Same WiFi
+        - Server-IP: 192.168.x.x (erste 3 Zahlen reichen / first 3 numbers sufficient)
+    validations:
+      required: false
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: 📋 Logs / Screenshots
+      description: |
+        Falls vorhanden: Screenshots oder LogCat Output / If available: Screenshots or LogCat output
+        
+        LogCat Filter: `adb logcat -s SyncWorker NetworkMonitor WebDavSyncService`
+      placeholder: "Füge hier Logs oder Screenshots ein / Paste logs or screenshots here"
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: 🔧 Zusätzliche Informationen / Additional Context
+      description: Gibt es noch etwas, das wir wissen sollten? / Is there anything else we should know?
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: ✅ Checklist
+      options:
+        - label: Ich habe die [Troubleshooting-Sektion](https://github.com/inventory69/simple-notes-sync/blob/main/QUICKSTART.md#troubleshooting) gelesen / I have read the troubleshooting section
+          required: false
+        - label: Ich habe "Verbindung testen" in den Einstellungen probiert / I have tried "Test connection" in settings
+          required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: true
+contact_links:
+  - name: 📖 Dokumentation / Documentation
+    url: https://github.com/inventory69/simple-notes-sync/blob/main/README.md
+    about: Schau zuerst in die Dokumentation / Check documentation first
+  - name: 🚀 Quick Start Guide
+    url: https://github.com/inventory69/simple-notes-sync/blob/main/QUICKSTART.md
+    about: Schritt-für-Schritt Anleitung / Step-by-step guide
+  - name: 🐛 Troubleshooting
+    url: https://github.com/inventory69/simple-notes-sync/blob/main/QUICKSTART.md#troubleshooting
+    about: Häufige Probleme und Lösungen / Common issues and solutions

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,84 @@
+name: 💡 Feature Request / Feature-Wunsch
+description: Schlage eine neue Funktion vor / Suggest a new feature
+title: "[FEATURE] "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Danke für deinen Feature-Vorschlag! / Thanks for your feature suggestion!
+
+  - type: textarea
+    id: feature-description
+    attributes:
+      label: 💡 Feature-Beschreibung / Feature Description
+      description: Was möchtest du hinzugefügt haben? / What would you like to be added?
+      placeholder: "z.B. Notizen sollten Markdown-Formatierung unterstützen / e.g. Notes should support markdown formatting"
+    validations:
+      required: true
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: 🎯 Problem / Motivation
+      description: Welches Problem würde dieses Feature lösen? / What problem would this feature solve?
+      placeholder: "z.B. Ich möchte Code-Snippets und Listen in meinen Notizen formatieren / e.g. I want to format code snippets and lists in my notes"
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: 📝 Vorgeschlagene Lösung / Proposed Solution
+      description: Wie könnte das Feature funktionieren? / How could the feature work?
+      placeholder: "z.B. Markdown-Editor mit Live-Preview / e.g. Markdown editor with live preview"
+    validations:
+      required: false
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: 🔄 Alternativen / Alternatives
+      description: Hast du andere Lösungsansätze in Betracht gezogen? / Have you considered other solutions?
+    validations:
+      required: false
+
+  - type: dropdown
+    id: platform
+    attributes:
+      label: 📱 Plattform / Platform
+      description: Für welche Komponente ist das Feature? / For which component is the feature?
+      options:
+        - Android App
+        - WebDAV Server
+        - Dokumentation / Documentation
+        - Andere / Other
+    validations:
+      required: true
+
+  - type: dropdown
+    id: priority
+    attributes:
+      label: 🌟 Priorität (aus deiner Sicht) / Priority (from your perspective)
+      options:
+        - Nice to have
+        - Wichtig / Important
+        - Sehr wichtig / Very important
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: willing-to-contribute
+    attributes:
+      label: 🤝 Beitragen / Contribute
+      options:
+        - label: Ich würde gerne bei der Implementierung helfen / I would like to help with implementation
+          required: false
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: 🔧 Zusätzliche Informationen / Additional Context
+      description: Screenshots, Mockups, Links, ähnliche Apps, etc.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/question.yml

@@ -0,0 +1,76 @@
+name: ❓ Question / Frage
+description: Stelle eine Frage zur Nutzung / Ask a question about usage
+title: "[QUESTION] "
+labels: ["question"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Hast du eine Frage? Wir helfen gerne! / Have a question? We're happy to help!
+
+  - type: textarea
+    id: question
+    attributes:
+      label: ❓ Frage / Question
+      description: Was möchtest du wissen? / What would you like to know?
+      placeholder: "z.B. Wie kann ich die Sync-URL für einen externen Server konfigurieren? / e.g. How can I configure the sync URL for an external server?"
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: documentation-checked
+    attributes:
+      label: 📚 Dokumentation gelesen / Documentation checked
+      description: Hast du bereits in der Dokumentation nachgeschaut? / Have you already checked the documentation?
+      options:
+        - label: Ich habe die [README](https://github.com/inventory69/simple-notes-sync/blob/main/README.md) gelesen / I have read the README
+          required: false
+        - label: Ich habe den [Quick Start Guide](https://github.com/inventory69/simple-notes-sync/blob/main/QUICKSTART.md) gelesen / I have read the Quick Start Guide
+          required: false
+        - label: Ich habe das [Troubleshooting](https://github.com/inventory69/simple-notes-sync/blob/main/QUICKSTART.md#troubleshooting) durchgearbeitet / I have checked the troubleshooting section
+          required: false
+
+  - type: textarea
+    id: tried
+    attributes:
+      label: 🔍 Was hast du bereits versucht? / What have you already tried?
+      description: Hilf uns, dir besser zu helfen / Help us help you better
+      placeholder: "z.B. Ich habe versucht die Server-URL anzupassen, aber... / e.g. I tried adjusting the server URL, but..."
+    validations:
+      required: false
+
+  - type: dropdown
+    id: topic
+    attributes:
+      label: <EFBFBD> Thema / Topic
+      description: Um was geht es? / What is this about?
+      options:
+        - Server Setup / Server-Einrichtung
+        - App-Konfiguration / App configuration
+        - Sync-Probleme / Sync issues
+        - Netzwerk / Network
+        - Android-Einstellungen / Android settings
+        - Andere / Other
+    validations:
+      required: false
+
+  - type: textarea
+    id: context
+    attributes:
+      label: <EFBFBD> Kontext / Context
+      description: Zusätzliche Informationen die hilfreich sein könnten / Additional information that might be helpful
+      placeholder: |
+        - Android Version: Android 13
+        - App Version: v1.1.0
+        - Server: Raspberry Pi mit Docker / Raspberry Pi with Docker
+        - Netzwerk: Lokales WiFi / Local WiFi
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: 🔧 Screenshots / Config
+      description: Falls hilfreich (KEINE Passwörter!) / If helpful (NO passwords!)
+    validations:
+      required: false

.github/workflows/build-production-apk.yml

@@ -2,11 +2,11 @@ name: Build Android Production APK
 
 on:
   push:
-    branches: [ main ]  # Trigger on push to main branch
-  workflow_dispatch:  # Allow manual trigger
+    branches: [ main ]  # Nur bei Push/Merge auf main triggern
+  workflow_dispatch:  # Ermöglicht manuellen Trigger
 
 permissions:
-  contents: write  # Required for creating releases
+  contents: write  # Fuer Release-Erstellung erforderlich
 
 jobs:
   build:
@@ -14,185 +14,164 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-      - name: Checkout code
+      - name: Code auschecken
         uses: actions/checkout@v4
       
-      - name: Setup Java
+      - name: Java einrichten
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: '17'
       
-      - name: Generate Production version number
+      - name: Semantic Versionsnummer aus build.gradle.kts extrahieren
         run: |
-          # Generate semantic version: YYYY.MM.DD
-          VERSION_NAME="$(date +'%Y.%m.%d')"
+          # Version aus build.gradle.kts fuer F-Droid Kompatibilität
+          VERSION_NAME=$(grep "versionName = " android/app/build.gradle.kts | sed 's/.*versionName = "\(.*\)".*/\1/')
+          VERSION_CODE=$(grep "versionCode = " android/app/build.gradle.kts | sed 's/.*versionCode = \([0-9]*\).*/\1/')
           
-          # Use GitHub run number as build number for production
-          BUILD_NUMBER="${{ github.run_number }}"
+          # Semantische Versionierung (nicht datums-basiert)
+          BUILD_NUMBER="$VERSION_CODE"
           
           echo "VERSION_NAME=$VERSION_NAME" >> $GITHUB_ENV
           echo "BUILD_NUMBER=$BUILD_NUMBER" >> $GITHUB_ENV
-          echo "VERSION_TAG=v$VERSION_NAME-prod.$BUILD_NUMBER" >> $GITHUB_ENV
+          echo "VERSION_TAG=v$VERSION_NAME" >> $GITHUB_ENV
           
-          echo "🚀 Generated PRODUCTION version: $VERSION_NAME+$BUILD_NUMBER"
+          echo "🚀 Baue Version: $VERSION_NAME (Code: $BUILD_NUMBER)"
       
-      - name: Update build.gradle.kts with Production version
+      - name: Version aus build.gradle.kts verifizieren
         run: |
-          # Update versionCode and versionName in build.gradle.kts
-          sed -i "s/versionCode = [0-9]*/versionCode = ${{ env.BUILD_NUMBER }}/" android/app/build.gradle.kts
-          sed -i "s/versionName = \".*\"/versionName = \"${{ env.VERSION_NAME }}\"/" android/app/build.gradle.kts
-          
-          echo "✅ Updated build.gradle.kts:"
+          echo "✅ Verwende Version aus build.gradle.kts:"
           grep -E "versionCode|versionName" android/app/build.gradle.kts
       
-      - name: Setup Android signing
+      - name: Android Signing konfigurieren
         run: |
           echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 -d > android/app/simple-notes-release.jks
           echo "storePassword=${{ secrets.KEYSTORE_PASSWORD }}" > android/key.properties
           echo "keyPassword=${{ secrets.KEY_PASSWORD }}" >> android/key.properties
           echo "keyAlias=${{ secrets.KEY_ALIAS }}" >> android/key.properties
           echo "storeFile=simple-notes-release.jks" >> android/key.properties
-          echo "✅ Signing configuration created"
+          echo "✅ Signing-Konfiguration erstellt"
       
-      - name: Build Production APK (Release)
+      - name: Produktions-APK bauen (Standard + F-Droid Flavors)
         run: |
           cd android
-          ./gradlew assembleRelease --no-daemon --stacktrace
+          ./gradlew assembleStandardRelease assembleFdroidRelease --no-daemon --stacktrace
       
-      - name: Copy APK variants to root with version names
+      - name: APK-Varianten mit Versionsnamen kopieren
         run: |
           mkdir -p apk-output
           
+          # === Standard Flavor (mit Google Services) ===
+          # Universal APK (funktioniert auf allen Geraeten)
+          cp android/app/build/outputs/apk/standard/release/app-standard-universal-release.apk \
+             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-standard-universal.apk
+          
+          # ARM64 APK (moderne Geräte 2018+)
+          cp android/app/build/outputs/apk/standard/release/app-standard-arm64-v8a-release.apk \
+             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-standard-arm64-v8a.apk
+          
+          # ARMv7 APK (ältere Geräte)
+          cp android/app/build/outputs/apk/standard/release/app-standard-armeabi-v7a-release.apk \
+             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-standard-armeabi-v7a.apk
+          
+          # === F-Droid Flavor (ohne Google Services) ===
           # Universal APK
-          cp android/app/build/outputs/apk/release/app-universal-release.apk \
-             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-universal.apk
+          cp android/app/build/outputs/apk/fdroid/release/app-fdroid-universal-release.apk \
+             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-fdroid-universal.apk
           
           # ARM64 APK
-          cp android/app/build/outputs/apk/release/app-arm64-v8a-release.apk \
-             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-arm64-v8a.apk
+          cp android/app/build/outputs/apk/fdroid/release/app-fdroid-arm64-v8a-release.apk \
+             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-fdroid-arm64-v8a.apk
           
           # ARMv7 APK
-          cp android/app/build/outputs/apk/release/app-armeabi-v7a-release.apk \
-             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-armeabi-v7a.apk
+          cp android/app/build/outputs/apk/fdroid/release/app-fdroid-armeabi-v7a-release.apk \
+             apk-output/simple-notes-sync-v${{ env.VERSION_NAME }}-fdroid-armeabi-v7a.apk
           
-          echo "✅ APK files prepared:"
+          echo "✅ APK-Dateien vorbereitet (Standard + F-Droid):"
           ls -lh apk-output/
       
-      - name: Upload APK artifacts
+      - name: APK-Artefakte hochladen
         uses: actions/upload-artifact@v4
         with:
           name: simple-notes-sync-apks-v${{ env.VERSION_NAME }}
           path: apk-output/*.apk
-          retention-days: 90  # Keep production builds longer
+          retention-days: 90  # Produktions-Builds länger aufbewahren
       
-      - name: Get commit info
+      - name: Commit-Informationen auslesen
         run: |
           echo "SHORT_SHA=$(git rev-parse --short HEAD)" >> $GITHUB_ENV
           echo "COMMIT_DATE=$(git log -1 --format=%cd --date=iso-strict)" >> $GITHUB_ENV
+      
+      - name: F-Droid Changelogs lesen
+        run: |
+          # Lese deutsche Changelog (Hauptsprache)
+          if [ -f "android/fastlane/metadata/android/de-DE/changelogs/${{ env.BUILD_NUMBER }}.txt" ]; then
+            {
+              echo 'CHANGELOG_DE<<EOF'
+              cat "android/fastlane/metadata/android/de-DE/changelogs/${{ env.BUILD_NUMBER }}.txt"
+              echo 'EOF'
+            } >> $GITHUB_ENV
+          else
+            echo "CHANGELOG_DE=Keine deutschen Release Notes verfügbar." >> $GITHUB_ENV
+          fi
           
-          # Get full commit message preserving newlines and emojis (UTF-8)
-          {
-            echo 'COMMIT_MSG<<EOF'
-            git -c core.quotepath=false log -1 --pretty=%B
-            echo 'EOF'
-          } >> $GITHUB_ENV
+          # Lese englische Changelog (optional)
+          if [ -f "android/fastlane/metadata/android/en-US/changelogs/${{ env.BUILD_NUMBER }}.txt" ]; then
+            {
+              echo 'CHANGELOG_EN<<EOF'
+              cat "android/fastlane/metadata/android/en-US/changelogs/${{ env.BUILD_NUMBER }}.txt"
+              echo 'EOF'
+            } >> $GITHUB_ENV
+          else
+            echo "CHANGELOG_EN=" >> $GITHUB_ENV
+          fi
       
       - name: Create Production Release
         uses: softprops/action-gh-release@v1
         with:
           tag_name: ${{ env.VERSION_TAG }}
-          name: "📝 Simple Notes Sync v${{ env.VERSION_NAME }} (Produktions-Release)"
+          name: "📝 Simple Notes Sync v${{ env.VERSION_NAME }}"
           files: apk-output/*.apk
           draft: false
           prerelease: false
           generate_release_notes: false
           body: |
-            # 📝 Produktions-Release: Simple Notes Sync v${{ env.VERSION_NAME }}
+            ## 📦 Downloads
             
-            ## Build-Informationen
+            | Variante | Datei | Info |
+            |----------|-------|------|
+            | **🏆 Empfohlen** | `simple-notes-sync-v${{ env.VERSION_NAME }}-standard-universal.apk` | Funktioniert auf allen Android-Geraeten |
+            | Modern (2018+) | `simple-notes-sync-v${{ env.VERSION_NAME }}-standard-arm64-v8a.apk` | Kleinere Dateigröße fuer 64-bit Geräte |
+            | Aelter (<2018) | `simple-notes-sync-v${{ env.VERSION_NAME }}-standard-armeabi-v7a.apk` | Fuer 32-bit ARM Geräte |
+            | F-Droid Universal | `simple-notes-sync-v${{ env.VERSION_NAME }}-fdroid-universal.apk` | Fuer F-Droid Store |
+            | F-Droid ARM64 | `simple-notes-sync-v${{ env.VERSION_NAME }}-fdroid-arm64-v8a.apk` | F-Droid 64-bit |
+            | F-Droid ARMv7 | `simple-notes-sync-v${{ env.VERSION_NAME }}-fdroid-armeabi-v7a.apk` | F-Droid 32-bit |
             
-            - **Version:** ${{ env.VERSION_NAME }}+${{ env.BUILD_NUMBER }}
-            - **Build-Datum:** ${{ env.COMMIT_DATE }}
+            💡 **Nicht sicher?** → Nimm die **Universal** APK!
+            
+            ---
+            
+            ## 📋 Changelog / Release Notes
+            
+            ${{ env.CHANGELOG_EN }}
+            
+            <details>
+            <summary><3E>🇪 Deutsche Version (zum Aufklappen)</summary>
+            
+            ${{ env.CHANGELOG_DE }}
+            
+            </details>
+            
+            ---
+            
+            ## 📊 Build-Info
+            
+            - **Version:** ${{ env.VERSION_NAME }} (Code: ${{ env.BUILD_NUMBER }})
+            - **Datum:** ${{ env.COMMIT_DATE }}
             - **Commit:** ${{ env.SHORT_SHA }}
-            - **Umgebung:** 🟢 **PRODUKTION**
             
             ---
             
-            ## 📋 Änderungen
-            
-            ${{ env.COMMIT_MSG }}
-            
-            ---
-            
-            ## 📦 Download & Installation
-            
-            ### Welche APK soll ich herunterladen?
-            
-            | Dein Gerät | Lade diese APK herunter | Größe | Kompatibilität |
-            |------------|------------------------|-------|----------------|
-            | 🤷 Nicht sicher? | `simple-notes-sync-v${{ env.VERSION_NAME }}-universal.apk` | ~5 MB | Funktioniert auf allen Geräten |
-            | Modern (2018+) | `simple-notes-sync-v${{ env.VERSION_NAME }}-arm64-v8a.apk` | ~3 MB | Schneller, kleiner |
-            | Ältere Geräte | `simple-notes-sync-v${{ env.VERSION_NAME }}-armeabi-v7a.apk` | ~3 MB | Ältere ARM-Chips |
-            
-            ### Installationsschritte
-            1. Lade die passende APK aus den Assets unten herunter
-            2. Aktiviere "Installation aus unbekannten Quellen" in den Android-Einstellungen
-            3. Öffne die heruntergeladene APK-Datei
-            4. Folge den Installationsanweisungen
-            5. Konfiguriere die WebDAV-Einstellungen in der App
-            
-            ---
-            
-            ## ⚙️ Funktionen
-            
-            - ✅ Automatische WebDAV-Synchronisation alle 30 Minuten (~0,4% Akku/Tag)
-            - ✅ Intelligente Gateway-Erkennung (automatische Heimnetzwerk-Erkennung)
-            - ✅ Material Design 3 Oberfläche
-            - ✅ Datenschutzorientiert (kein Tracking, keine Analysen)
-            - ✅ Offline-First Architektur
-            
-            ---
-            
-            ## 🔄 Update von vorheriger Version
-            
-            Installiere diese APK einfach über die bestehende Installation - alle Daten und Einstellungen bleiben erhalten.
-            
-            ---
-            
-            ## 📱 Obtanium - Auto-Update App
-            
-            Erhalte automatische Updates mit [Obtanium](https://github.com/ImranR98/Obtanium/releases/latest).
-            
-            **Einrichtung:**
-            1. Installiere Obtanium über den Link oben
-            2. Füge die App mit dieser URL hinzu: `https://github.com/dettmersLiq/simple-notes-sync`
-            3. Aktiviere Auto-Updates
-            
-            ---
-            
-            ## 🆘 Support
-            
-            Bei Problemen oder Fragen öffne bitte ein Issue auf GitHub.
-            
-            ---
-            
-            ## 🔒 Datenschutz & Sicherheit
-            
-            - Alle Daten werden über deinen eigenen WebDAV-Server synchronisiert
-            - Keine Drittanbieter-Analysen oder Tracking
-            - Keine Internet-Berechtigungen außer für WebDAV-Sync
-            - Alle Synchronisationsvorgänge verschlüsselt (HTTPS)
-            - Open Source - prüfe den Code selbst
-            
-            ---
-            
-            ## 🛠️ Erstellt mit
-            
-            - **Sprache:** Kotlin
-            - **UI:** Material Design 3
-            - **Sync:** WorkManager + WebDAV
-            - **Target SDK:** Android 16 (API 36)
-            - **Min SDK:** Android 8.0 (API 26)
+            **[📖 Dokumentation](https://github.com/inventory69/simple-notes-sync/blob/main/QUICKSTART.md)** · **[🐛 Issue melden](https://github.com/inventory69/simple-notes-sync/issues)**
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pr-build-check.yml

@@ -0,0 +1,99 @@
+name: PR Build Check
+on:
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'android/**'
+      - '.github/workflows/pr-build-check.yml'
+jobs:
+  build:
+    name: Build & Test APK
+    runs-on: ubuntu-latest
+    steps:
+      - name: Code auschecken
+        uses: actions/checkout@v4
+      - name: Java einrichten
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - name: Gradle Cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+      - name: Version auslesen
+        run: |
+          VERSION_NAME=$(grep "versionName = " android/app/build.gradle.kts | sed 's/.*versionName = "\(.*\)".*/\1/')
+          VERSION_CODE=$(grep "versionCode = " android/app/build.gradle.kts | sed 's/.*versionCode = \([0-9]*\).*/\1/')
+          echo "VERSION_NAME=$VERSION_NAME" >> $GITHUB_ENV
+          echo "VERSION_CODE=$VERSION_CODE" >> $GITHUB_ENV
+          echo "📱 Version: $VERSION_NAME (Code: $VERSION_CODE)"
+      - name: Debug Build erstellen (ohne Signing)
+        run: |
+          cd android
+          ./gradlew assembleStandardDebug assembleFdroidDebug --no-daemon --stacktrace
+      - name: Unit Tests ausfuehren
+        run: |
+          cd android
+          ./gradlew test --no-daemon --stacktrace
+        continue-on-error: true
+      - name: Build-Ergebnis pruefen
+        run: |
+          if [ -f "android/app/build/outputs/apk/standard/debug/app-standard-universal-debug.apk" ]; then
+            echo "✅ Standard Debug APK erfolgreich gebaut"
+            ls -lh android/app/build/outputs/apk/standard/debug/*.apk
+          else
+            echo "❌ Standard Debug APK Build fehlgeschlagen"
+            exit 1
+          fi
+          if [ -f "android/app/build/outputs/apk/fdroid/debug/app-fdroid-universal-debug.apk" ]; then
+            echo "✅ F-Droid Debug APK erfolgreich gebaut"
+            ls -lh android/app/build/outputs/apk/fdroid/debug/*.apk
+          else
+            echo "❌ F-Droid Debug APK Build fehlgeschlagen"
+            exit 1
+          fi
+      - name: Debug APKs hochladen (Artefakte)
+        uses: actions/upload-artifact@v4
+        with:
+          name: debug-apks-pr-${{ github.event.pull_request.number }}
+          path: |
+            android/app/build/outputs/apk/standard/debug/*.apk
+            android/app/build/outputs/apk/fdroid/debug/*.apk
+          retention-days: 30
+      - name: Kommentar zu PR hinzufuegen
+        uses: actions/github-script@v7
+        if: success()
+        with:
+          script: |
+            const fs = require('fs');
+            const standardApk = fs.readdirSync('android/app/build/outputs/apk/standard/debug/')
+              .filter(f => f.endsWith('.apk'));
+            const fdroidApk = fs.readdirSync('android/app/build/outputs/apk/fdroid/debug/')
+              .filter(f => f.endsWith('.apk'));
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: `## ✅ Build erfolgreich!
+            
+            **Version:** ${{ env.VERSION_NAME }} (Code: ${{ env.VERSION_CODE }})
+            
+            ### 📦 Debug APKs (Test-Builds)
+            Die Debug-APKs wurden erfolgreich gebaut und sind als Artefakte verfuegbar:
+            
+            **Standard Flavor:**
+            ${standardApk.map(f => '- \`' + f + '\`').join('\n')}
+            
+            **F-Droid Flavor:**
+            ${fdroidApk.map(f => '- \`' + f + '\`').join('\n')}
+            
+            > ⚠️ **Hinweis:** Dies sind unsigned Debug-Builds zum Testen. Production Releases werden nur bei Merge auf \`main\` erstellt.
+            
+            [📥 Download Artefakte](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})`
+            })

CONTRIBUTING.md

@@ -0,0 +1,263 @@
+# Contributing to Simple Notes Sync 🤝
+
+> Beiträge sind willkommen! / Contributions are welcome!
+
+**🌍 Languages:** [Deutsch](#deutsch) · [English](#english)
+
+---
+
+## Deutsch
+
+Danke, dass du zu Simple Notes Sync beitragen möchtest! 
+
+### 🚀 Schnellstart
+
+1. **Fork & Clone**
+   ```bash
+   git clone https://github.com/DEIN-USERNAME/simple-notes-sync.git
+   cd simple-notes-sync
+   ```
+
+2. **Branch erstellen**
+   ```bash
+   git checkout -b feature/mein-feature
+   # oder
+   git checkout -b fix/mein-bugfix
+   ```
+
+3. **Änderungen machen**
+   - Code schreiben
+   - Testen
+   - Committen mit aussagekräftiger Message
+
+4. **Pull Request erstellen**
+   - Push deinen Branch: `git push origin feature/mein-feature`
+   - Gehe zu GitHub und erstelle einen Pull Request
+   - Beschreibe deine Änderungen
+
+### 🧪 Automatische Tests
+
+Wenn du einen Pull Request erstellst, läuft automatisch ein **Build Check**:
+
+- ✅ Debug APKs werden gebaut (Standard + F-Droid)
+- ✅ Unit Tests werden ausgeführt
+- ✅ APKs werden als Artefakte hochgeladen (zum Testen)
+- ✅ Build-Status wird als Kommentar im PR gepostet
+
+**Wichtig:** Der Build muss erfolgreich sein (grüner Haken ✅) bevor der PR gemerged werden kann.
+
+### 📱 Android App Development
+
+**Build lokal testen:**
+```bash
+cd android
+
+# Debug Build
+./gradlew assembleStandardDebug
+
+# Tests ausführen
+./gradlew test
+
+# Lint Check
+./gradlew lint
+```
+
+**Anforderungen:**
+- Android SDK 36 (Target)
+- Android SDK 24 (Minimum)
+- JDK 17
+- Kotlin 1.9+
+
+### 📝 Code Style
+
+- **Kotlin:** Folge den [Kotlin Coding Conventions](https://kotlinlang.org/docs/coding-conventions.html)
+- **Formatierung:** Android Studio Default Formatter
+- **Kommentare:** Deutsch oder Englisch (bevorzugt Englisch für Code)
+
+### 🐛 Bug Reports
+
+Nutze die [Bug Report Template](https://github.com/inventory69/simple-notes-sync/issues/new/choose) mit:
+- Android Version
+- App Version
+- Schritte zum Reproduzieren
+- Erwartetes vs. tatsächliches Verhalten
+
+### 💡 Feature Requests
+
+Nutze die [Feature Request Template](https://github.com/inventory69/simple-notes-sync/issues/new/choose) und beschreibe:
+- Was soll hinzugefügt werden
+- Warum ist es nützlich
+- Wie könnte es funktionieren
+
+### 📚 Dokumentation
+
+Dokumentations-Verbesserungen sind auch Contributions! 
+
+**Dateien:**
+- `README.md` / `README.en.md` - Übersicht
+- `QUICKSTART.md` / `QUICKSTART.en.md` - Schritt-für-Schritt Anleitung
+- `DOCS.md` / `DOCS.en.md` - Technische Details
+- `server/README.md` / `server/README.en.md` - Server Setup
+
+**Bitte:** Halte beide Sprachen (DE/EN) synchron!
+
+### ✅ Pull Request Checklist
+
+- [ ] Code kompiliert lokal (`./gradlew assembleStandardDebug`)
+- [ ] Tests laufen durch (`./gradlew test`)
+- [ ] Keine neuen Lint-Warnungen
+- [ ] Commit-Messages sind aussagekräftig
+- [ ] Dokumentation aktualisiert (falls nötig)
+- [ ] Beide Sprachen aktualisiert (bei Doku-Änderungen)
+
+### 🎯 Was wird akzeptiert?
+
+**✅ Gerne:**
+- Bug Fixes
+- Performance-Verbesserungen
+- Neue Features (nach Diskussion in einem Issue)
+- Dokumentations-Verbesserungen
+- Tests
+- UI/UX Verbesserungen
+
+**❌ Schwierig:**
+- Breaking Changes (bitte erst als Issue diskutieren)
+- Komplett neue Architektur
+- Dependencies mit fragwürdigen Lizenzen
+
+### 📄 Lizenz
+
+Indem du contributest, stimmst du zu dass dein Code unter der [MIT License](LICENSE) veröffentlicht wird.
+
+---
+
+## English
+
+Thanks for wanting to contribute to Simple Notes Sync!
+
+### 🚀 Quick Start
+
+1. **Fork & Clone**
+   ```bash
+   git clone https://github.com/YOUR-USERNAME/simple-notes-sync.git
+   cd simple-notes-sync
+   ```
+
+2. **Create Branch**
+   ```bash
+   git checkout -b feature/my-feature
+   # or
+   git checkout -b fix/my-bugfix
+   ```
+
+3. **Make Changes**
+   - Write code
+   - Test
+   - Commit with meaningful message
+
+4. **Create Pull Request**
+   - Push your branch: `git push origin feature/my-feature`
+   - Go to GitHub and create a Pull Request
+   - Describe your changes
+
+### 🧪 Automated Tests
+
+When you create a Pull Request, an automatic **Build Check** runs:
+
+- ✅ Debug APKs are built (Standard + F-Droid)
+- ✅ Unit tests are executed
+- ✅ APKs are uploaded as artifacts (for testing)
+- ✅ Build status is posted as comment in PR
+
+**Important:** The build must succeed (green checkmark ✅) before the PR can be merged.
+
+### 📱 Android App Development
+
+**Test build locally:**
+```bash
+cd android
+
+# Debug Build
+./gradlew assembleStandardDebug
+
+# Run tests
+./gradlew test
+
+# Lint Check
+./gradlew lint
+```
+
+**Requirements:**
+- Android SDK 36 (Target)
+- Android SDK 24 (Minimum)
+- JDK 17
+- Kotlin 1.9+
+
+### 📝 Code Style
+
+- **Kotlin:** Follow [Kotlin Coding Conventions](https://kotlinlang.org/docs/coding-conventions.html)
+- **Formatting:** Android Studio Default Formatter
+- **Comments:** German or English (preferably English for code)
+
+### 🐛 Bug Reports
+
+Use the [Bug Report Template](https://github.com/inventory69/simple-notes-sync/issues/new/choose) with:
+- Android version
+- App version
+- Steps to reproduce
+- Expected vs. actual behavior
+
+### 💡 Feature Requests
+
+Use the [Feature Request Template](https://github.com/inventory69/simple-notes-sync/issues/new/choose) and describe:
+- What should be added
+- Why is it useful
+- How could it work
+
+### 📚 Documentation
+
+Documentation improvements are also contributions!
+
+**Files:**
+- `README.md` / `README.en.md` - Overview
+- `QUICKSTART.md` / `QUICKSTART.en.md` - Step-by-step guide
+- `DOCS.md` / `DOCS.en.md` - Technical details
+- `server/README.md` / `server/README.en.md` - Server setup
+
+**Please:** Keep both languages (DE/EN) in sync!
+
+### ✅ Pull Request Checklist
+
+- [ ] Code compiles locally (`./gradlew assembleStandardDebug`)
+- [ ] Tests pass (`./gradlew test`)
+- [ ] No new lint warnings
+- [ ] Commit messages are meaningful
+- [ ] Documentation updated (if needed)
+- [ ] Both languages updated (for doc changes)
+
+### 🎯 What Gets Accepted?
+
+**✅ Welcome:**
+- Bug fixes
+- Performance improvements
+- New features (after discussion in an issue)
+- Documentation improvements
+- Tests
+- UI/UX improvements
+
+**❌ Difficult:**
+- Breaking changes (please discuss in issue first)
+- Completely new architecture
+- Dependencies with questionable licenses
+
+### 📄 License
+
+By contributing, you agree that your code will be published under the [MIT License](LICENSE).
+
+---
+
+## 🆘 Fragen? / Questions?
+
+Öffne ein [Issue](https://github.com/inventory69/simple-notes-sync/issues) oder nutze die [Question Template](https://github.com/inventory69/simple-notes-sync/issues/new/choose).
+
+**Frohe Weihnachten & Happy Coding! 🎄**

DOCS.en.md

@@ -0,0 +1,529 @@
+# Simple Notes Sync - Technical Documentation
+
+This file contains detailed technical information about implementation, architecture, and advanced features.
+
+**🌍 Languages:** [Deutsch](DOCS.md) · **English**
+
+---
+
+## 📐 Architecture
+
+### Overall Overview
+
+```
+┌─────────────────┐
+│  Android App    │
+│  (Kotlin)       │
+└────────┬────────┘
+         │ WebDAV/HTTP
+         │
+┌────────▼────────┐
+│  WebDAV Server  │
+│  (Docker)       │
+└─────────────────┘
+```
+
+### Android App Architecture
+
+```
+app/
+├── models/
+│   ├── Note.kt              # Data class for notes
+│   └── SyncStatus.kt        # Sync status enum
+├── storage/
+│   └── NotesStorage.kt      # Local JSON file storage
+├── sync/
+│   ├── WebDavSyncService.kt # WebDAV sync logic
+│   ├── NetworkMonitor.kt    # WiFi detection
+│   ├── SyncWorker.kt        # WorkManager background worker
+│   └── BootReceiver.kt      # Device reboot handler
+├── adapters/
+│   └── NotesAdapter.kt      # RecyclerView adapter
+├── utils/
+│   ├── Constants.kt         # App constants
+│   ├── NotificationHelper.kt# Notification management
+│   └── Logger.kt            # Debug/release logging
+└── activities/
+    ├── MainActivity.kt      # Main view with list
+    ├── NoteEditorActivity.kt# Note editor
+    └── SettingsActivity.kt  # Server configuration
+```
+
+---
+
+## 🔄 Auto-Sync Implementation
+
+### WorkManager Periodic Task
+
+Auto-sync is based on **WorkManager** with the following configuration:
+
+```kotlin
+val constraints = Constraints.Builder()
+    .setRequiredNetworkType(NetworkType.UNMETERED)  // WiFi only
+    .build()
+
+val syncRequest = PeriodicWorkRequestBuilder<SyncWorker>(
+    30, TimeUnit.MINUTES,  // Every 30 minutes
+    10, TimeUnit.MINUTES   // Flex interval
+)
+    .setConstraints(constraints)
+    .build()
+```
+
+**Why WorkManager?**
+- ✅ Runs even when app is closed
+- ✅ Automatic restart after device reboot
+- ✅ Battery-efficient (Android managed)
+- ✅ Guaranteed execution when constraints are met
+
+### Network Detection
+
+Instead of SSID-based detection (Android 13+ privacy issues), we use **Gateway IP Comparison**:
+
+```kotlin
+fun isInHomeNetwork(): Boolean {
+    val gatewayIP = getGatewayIP()         // e.g. 192.168.0.1
+    val serverIP = extractIPFromUrl(serverUrl)  // e.g. 192.168.0.188
+    
+    return isSameNetwork(gatewayIP, serverIP)  // Checks /24 network
+}
+```
+
+**Advantages:**
+- ✅ No location permissions needed
+- ✅ Works with all Android versions
+- ✅ Reliable and fast
+
+### Sync Flow
+
+```
+1. WorkManager wakes up (every 30 min)
+   ↓
+2. Check: WiFi connected?
+   ↓
+3. Check: Same network as server?
+   ↓
+4. Load local notes
+   ↓
+5. Upload new/changed notes → Server
+   ↓
+6. Download remote notes ← Server
+   ↓
+7. Merge & resolve conflicts
+   ↓
+8. Update local storage
+   ↓
+9. Show notification (if changes)
+```
+
+---
+
+## <20> Sync Trigger Overview
+
+The app uses **4 different sync triggers** with different use cases:
+
+| Trigger | File | Function | When? | Pre-Check? |
+|---------|------|----------|-------|------------|
+| **1. Manual Sync** | `MainActivity.kt` | `triggerManualSync()` | User clicks sync button in menu | ✅ Yes |
+| **2. Auto-Sync (onResume)** | `MainActivity.kt` | `triggerAutoSync()` | App opened/resumed | ✅ Yes |
+| **3. Background Sync (Periodic)** | `SyncWorker.kt` | `doWork()` | Every 15/30/60 minutes (configurable) | ✅ Yes |
+| **4. WiFi-Connect Sync** | `NetworkMonitor.kt` → `SyncWorker.kt` | `triggerWifiConnectSync()` | WiFi enabled/SSID changed | ✅ Yes |
+
+### Server Reachability Check (Pre-Check)
+
+**All 4 sync triggers** use a **pre-check** before the actual sync:
+
+```kotlin
+// WebDavSyncService.kt - isServerReachable()
+suspend fun isServerReachable(): Boolean = withContext(Dispatchers.IO) {
+    return@withContext try {
+        Socket().use { socket ->
+            socket.connect(InetSocketAddress(host, port), 2000)  // 2s Timeout
+        }
+        true
+    } catch (e: Exception) {
+        Logger.d(TAG, "Server not reachable: ${e.message}")
+        false
+    }
+}
+```
+
+**Why Socket Check instead of HTTP Request?**
+- ⚡ **Faster:** Socket connect is instant, HTTP request takes longer
+- 🔋 **Battery Efficient:** No HTTP overhead (headers, TLS handshake, etc.)
+- 🎯 **More Precise:** Only checks network reachability, not server logic
+- 🛡️ **Prevents Errors:** Detects foreign WiFi networks before sync error occurs
+
+**When does the check fail?**
+- ❌ Server offline/unreachable
+- ❌ Wrong WiFi network (e.g. public café WiFi)
+- ❌ Network not ready yet (DHCP/routing delay after WiFi connect)
+- ❌ VPN blocks server access
+- ❌ No WebDAV server URL configured
+
+### Sync Behavior by Trigger Type
+
+| Trigger | When server not reachable | On successful sync | Throttling |
+|---------|--------------------------|-------------------|------------|
+| Manual Sync | Toast: "Server not reachable" | Toast: "✅ Synced: X notes" | None |
+| Auto-Sync (onResume) | Silent abort (no toast) | Toast: "✅ Synced: X notes" | Max. 1x/min |
+| Background Sync | Silent abort (no toast) | Silent (LocalBroadcast only) | 15/30/60 min |
+| WiFi-Connect Sync | Silent abort (no toast) | Silent (LocalBroadcast only) | SSID-based |
+
+---
+
+## <20>🔋 Battery Optimization
+
+### Usage Analysis
+
+| Component | Frequency | Usage | Details |
+|------------|----------|-----------|---------|
+| WorkManager Wakeup | Every 30 min | ~0.15 mAh | System wakes up |
+| Network Check | 48x/day | ~0.03 mAh | Gateway IP check |
+| WebDAV Sync | 2-3x/day | ~1.5 mAh | Only when changes |
+| **Total** | - | **~12 mAh/day** | **~0.4%** at 3000mAh |
+
+### Optimizations
+
+1. **IP Caching**
+   ```kotlin
+   private var cachedServerIP: String? = null
+   // DNS lookup only once at start, not every check
+   ```
+
+2. **Throttling**
+   ```kotlin
+   private var lastSyncTime = 0L
+   private const val MIN_SYNC_INTERVAL_MS = 60_000L  // Max 1 sync/min
+   ```
+
+3. **Conditional Logging**
+   ```kotlin
+   object Logger {
+       fun d(tag: String, msg: String) {
+           if (BuildConfig.DEBUG) Log.d(tag, msg)
+       }
+   }
+   ```
+
+4. **Network Constraints**
+   - WiFi only (not mobile data)
+   - Only when server is reachable
+   - No permanent listeners
+
+---
+
+## 📦 WebDAV Sync Details
+
+### Upload Flow
+
+```kotlin
+suspend fun uploadNotes(): Int {
+    val localNotes = storage.loadAllNotes()
+    var uploadedCount = 0
+    
+    for (note in localNotes) {
+        if (note.syncStatus == SyncStatus.PENDING) {
+            val jsonContent = note.toJson()
+            val remotePath = "$serverUrl/${note.id}.json"
+            
+            sardine.put(remotePath, jsonContent.toByteArray())
+            
+            note.syncStatus = SyncStatus.SYNCED
+            storage.saveNote(note)
+            uploadedCount++
+        }
+    }
+    
+    return uploadedCount
+}
+```
+
+### Download Flow
+
+```kotlin
+suspend fun downloadNotes(): DownloadResult {
+    val remoteFiles = sardine.list(serverUrl)
+    var downloadedCount = 0
+    var conflictCount = 0
+    
+    for (file in remoteFiles) {
+        if (!file.name.endsWith(".json")) continue
+        
+        val content = sardine.get(file.href)
+        val remoteNote = Note.fromJson(content)
+        val localNote = storage.loadNote(remoteNote.id)
+        
+        if (localNote == null) {
+            // New note from server
+            storage.saveNote(remoteNote)
+            downloadedCount++
+        } else if (localNote.modifiedAt < remoteNote.modifiedAt) {
+            // Server has newer version
+            storage.saveNote(remoteNote)
+            downloadedCount++
+        } else if (localNote.modifiedAt > remoteNote.modifiedAt) {
+            // Local version is newer → Conflict
+            resolveConflict(localNote, remoteNote)
+            conflictCount++
+        }
+    }
+    
+    return DownloadResult(downloadedCount, conflictCount)
+}
+```
+
+### Conflict Resolution
+
+Strategy: **Last-Write-Wins** with **Conflict Copy**
+
+```kotlin
+fun resolveConflict(local: Note, remote: Note) {
+    // Rename remote note (conflict copy)
+    val conflictNote = remote.copy(
+        id = "${remote.id}_conflict_${System.currentTimeMillis()}",
+        title = "${remote.title} (Conflict)"
+    )
+    
+    storage.saveNote(conflictNote)
+    
+    // Local note remains
+    local.syncStatus = SyncStatus.SYNCED
+    storage.saveNote(local)
+}
+```
+
+---
+
+## 🔔 Notifications
+
+### Notification Channels
+
+```kotlin
+val channel = NotificationChannel(
+    "notes_sync_channel",
+    "Notes Synchronization",
+    NotificationManager.IMPORTANCE_DEFAULT
+)
+```
+
+### Success Notification
+
+```kotlin
+fun showSyncSuccess(context: Context, count: Int) {
+    val intent = Intent(context, MainActivity::class.java)
+    val pendingIntent = PendingIntent.getActivity(context, 0, intent, FLAGS)
+    
+    val notification = NotificationCompat.Builder(context, CHANNEL_ID)
+        .setContentTitle("Sync successful")
+        .setContentText("$count notes synchronized")
+        .setContentIntent(pendingIntent)  // Click opens app
+        .setAutoCancel(true)              // Dismiss on click
+        .build()
+    
+    notificationManager.notify(NOTIFICATION_ID, notification)
+}
+```
+
+---
+
+## 🛡️ Permissions
+
+The app requires **minimal permissions**:
+
+```xml
+<!-- Network -->
+<uses-permission android:name="android.permission.INTERNET" />
+<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+
+<!-- Notifications -->
+<uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+<!-- Boot Receiver -->
+<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+
+<!-- Battery Optimization (optional) -->
+<uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+```
+
+**No Location Permissions!**  
+Earlier versions required `ACCESS_FINE_LOCATION` for SSID detection. Now we use Gateway IP Comparison.
+
+---
+
+## 🧪 Testing
+
+### Test Server
+
+```bash
+# WebDAV server reachable?
+curl -u noteuser:password http://192.168.0.188:8080/
+
+# Upload file
+echo '{"test":"data"}' > test.json
+curl -u noteuser:password -T test.json http://192.168.0.188:8080/test.json
+
+# Download file
+curl -u noteuser:password http://192.168.0.188:8080/test.json
+```
+
+### Test Android App
+
+**Unit Tests:**
+```bash
+cd android
+./gradlew test
+```
+
+**Instrumented Tests:**
+```bash
+./gradlew connectedAndroidTest
+```
+
+**Manual Testing Checklist:**
+
+- [ ] Create note → visible in list
+- [ ] Edit note → changes saved
+- [ ] Delete note → removed from list
+- [ ] Manual sync → server status "Reachable"
+- [ ] Auto-sync → notification after ~30 min
+- [ ] Close app → auto-sync continues
+- [ ] Device reboot → auto-sync starts automatically
+- [ ] Server offline → error notification
+- [ ] Notification click → app opens
+
+---
+
+## 🚀 Build & Deployment
+
+### Debug Build
+
+```bash
+cd android
+./gradlew assembleDebug
+# APK: app/build/outputs/apk/debug/app-debug.apk
+```
+
+### Release Build
+
+```bash
+./gradlew assembleRelease
+# APK: app/build/outputs/apk/release/app-release-unsigned.apk
+```
+
+### Sign (for Distribution)
+
+```bash
+# Create keystore
+keytool -genkey -v -keystore my-release-key.jks -keyalg RSA -keysize 2048 -validity 10000 -alias my-alias
+
+# Sign APK
+jarsigner -verbose -sigalg SHA256withRSA -digestalg SHA-256 \
+  -keystore my-release-key.jks \
+  app-release-unsigned.apk my-alias
+
+# Optimize
+zipalign -v 4 app-release-unsigned.apk app-release.apk
+```
+
+---
+
+## 🐛 Debugging
+
+### LogCat Filter
+
+```bash
+# Only app logs
+adb logcat -s SimpleNotesApp NetworkMonitor SyncWorker WebDavSyncService
+
+# With timestamps
+adb logcat -v time -s SyncWorker
+
+# Save to file
+adb logcat -s SyncWorker > sync_debug.log
+```
+
+### Common Issues
+
+**Problem: Auto-sync not working**
+```
+Solution: Disable battery optimization
+Settings → Apps → Simple Notes → Battery → Don't optimize
+```
+
+**Problem: Server not reachable**
+```
+Check: 
+1. Server running? → docker-compose ps
+2. IP correct? → ip addr show
+3. Port open? → telnet 192.168.0.188 8080
+4. Firewall? → sudo ufw allow 8080
+```
+
+**Problem: Notifications not appearing**
+```
+Check:
+1. Notification permission granted?
+2. Do Not Disturb active?
+3. App in background? → Force stop & restart
+```
+
+---
+
+## 📚 Dependencies
+
+```gradle
+// Core
+androidx.core:core-ktx:1.12.0
+androidx.appcompat:appcompat:1.6.1
+com.google.android.material:material:1.11.0
+
+// Lifecycle
+androidx.lifecycle:lifecycle-runtime-ktx:2.7.0
+
+// RecyclerView
+androidx.recyclerview:recyclerview:1.3.2
+
+// Coroutines
+org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3
+
+// WorkManager
+androidx.work:work-runtime-ktx:2.9.0
+
+// WebDAV Client
+com.github.thegrizzlylabs:sardine-android:0.8
+
+// Broadcast (deprecated but working)
+androidx.localbroadcastmanager:localbroadcastmanager:1.1.0
+```
+
+---
+
+## 🔮 Roadmap
+
+### v1.1
+- [ ] Search & Filter
+- [ ] Dark Mode
+- [ ] Tags/Categories
+- [ ] Markdown Preview
+
+### v2.0
+- [ ] Desktop Client (Flutter)
+- [ ] End-to-End Encryption
+- [ ] Shared Notes (Collaboration)
+- [ ] Attachment Support
+
+---
+
+## 📖 Further Documentation
+
+- [Project Docs](https://github.com/inventory69/project-docs/tree/main/simple-notes-sync)
+- [Sync Architecture](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/SYNC_ARCHITECTURE.md) - **Detailed Sync Trigger Documentation**
+- [Android Guide](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/ANDROID_GUIDE.md)
+- [Bugfix Documentation](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/BUGFIX_SYNC_SPAM_AND_NOTIFICATIONS.md)
+
+---
+
+**Last updated:** December 25, 2025

DOCS.md

@@ -2,6 +2,8 @@
 
 Diese Datei enthält detaillierte technische Informationen über die Implementierung, Architektur und erweiterte Funktionen.
 
+**🌍 Sprachen:** **Deutsch** · [English](DOCS.en.md)
+
 ---
 
 ## 📐 Architektur
@@ -116,7 +118,61 @@ fun isInHomeNetwork(): Boolean {
 
 ---
 
-## 🔋 Akku-Optimierung
+## <EFBFBD> Sync-Trigger Übersicht
+
+Die App verwendet **4 verschiedene Sync-Trigger** mit unterschiedlichen Anwendungsfällen:
+
+| Trigger | Datei | Funktion | Wann? | Pre-Check? |
+|---------|-------|----------|-------|------------|
+| **1. Manueller Sync** | `MainActivity.kt` | `triggerManualSync()` | User klickt auf Sync-Button im Menü | ✅ Ja |
+| **2. Auto-Sync (onResume)** | `MainActivity.kt` | `triggerAutoSync()` | App wird geöffnet/fortgesetzt | ✅ Ja |
+| **3. Hintergrund-Sync (Periodic)** | `SyncWorker.kt` | `doWork()` | Alle 15/30/60 Minuten (konfigurierbar) | ✅ Ja |
+| **4. WiFi-Connect Sync** | `NetworkMonitor.kt` → `SyncWorker.kt` | `triggerWifiConnectSync()` | WiFi an/SSID-Wechsel | ✅ Ja |
+
+### Server-Erreichbarkeits-Check (Pre-Check)
+
+**Alle 4 Sync-Trigger** verwenden vor dem eigentlichen Sync einen **Pre-Check**:
+
+```kotlin
+// WebDavSyncService.kt - isServerReachable()
+suspend fun isServerReachable(): Boolean = withContext(Dispatchers.IO) {
+    return@withContext try {
+        Socket().use { socket ->
+            socket.connect(InetSocketAddress(host, port), 2000)  // 2s Timeout
+        }
+        true
+    } catch (e: Exception) {
+        Logger.d(TAG, "Server not reachable: ${e.message}")
+        false
+    }
+}
+```
+
+**Warum Socket-Check statt HTTP-Request?**
+- ⚡ **Schneller:** Socket-Connect ist instant, HTTP-Request dauert länger
+- 🔋 **Akkuschonender:** Kein HTTP-Overhead (Headers, TLS Handshake, etc.)
+- 🎯 **Präziser:** Prüft nur Netzwerk-Erreichbarkeit, nicht Server-Logik
+- 🛡️ **Verhindert Fehler:** Erkennt fremde WiFi-Netze bevor Sync-Fehler entsteht
+
+**Wann schlägt der Check fehl?**
+- ❌ Server offline/nicht erreichbar
+- ❌ Falsches WiFi-Netzwerk (z.B. öffentliches Café-WiFi)
+- ❌ Netzwerk noch nicht bereit (DHCP/Routing-Delay nach WiFi-Connect)
+- ❌ VPN blockiert Server-Zugriff
+- ❌ Keine WebDAV-Server-URL konfiguriert
+
+### Sync-Verhalten nach Trigger-Typ
+
+| Trigger | Bei Server nicht erreichbar | Bei erfolgreichem Sync | Throttling |
+|---------|----------------------------|----------------------|------------|
+| Manueller Sync | Toast: "Server nicht erreichbar" | Toast: "✅ Gesynct: X Notizen" | Keins |
+| Auto-Sync (onResume) | Silent abort (kein Toast) | Toast: "✅ Gesynct: X Notizen" | Max. 1x/Min |
+| Hintergrund-Sync | Silent abort (kein Toast) | Silent (LocalBroadcast only) | 15/30/60 Min |
+| WiFi-Connect Sync | Silent abort (kein Toast) | Silent (LocalBroadcast only) | SSID-basiert |
+
+---
+
+## <20>🔋 Akku-Optimierung
 
 ### Verbrauchsanalyse
 
@@ -464,9 +520,10 @@ androidx.localbroadcastmanager:localbroadcastmanager:1.1.0
 ## 📖 Weitere Dokumentation
 
 - [Project Docs](https://github.com/inventory69/project-docs/tree/main/simple-notes-sync)
+- [Sync Architecture](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/SYNC_ARCHITECTURE.md) - **Detaillierte Sync-Trigger Dokumentation**
 - [Android Guide](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/ANDROID_GUIDE.md)
 - [Bugfix Documentation](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/BUGFIX_SYNC_SPAM_AND_NOTIFICATIONS.md)
 
 ---
 
-**Letzte Aktualisierung:** 21. Dezember 2025
+**Letzte Aktualisierung:** 25. Dezember 2025

GITHUB_ACTIONS_SETUP.md

@@ -1,188 +0,0 @@
-# GitHub Actions Setup Guide
-
-This guide explains how to set up the GitHub Actions workflow for automated APK builds with proper signing.
-
-## Overview
-
-The workflow in `.github/workflows/build-production-apk.yml` automatically:
-- Builds signed APKs on every push to `main`
-- Generates version numbers using `YYYY.MM.DD` + build number
-- Creates 3 APK variants (universal, arm64-v8a, armeabi-v7a)
-- Creates GitHub releases with all APKs attached
-
-## Prerequisites
-
-- GitHub CLI (`gh`) installed
-- Java 17+ installed (for keytool)
-- Git repository initialized with GitHub remote
-
-## Step 1: Generate Signing Keystore
-
-⚠️ **IMPORTANT**: Store the keystore securely! Without it, you cannot publish updates to your app.
-
-```bash
-# Navigate to project root
-cd /path/to/simple-notes-sync
-
-# Generate keystore (replace values as needed)
-keytool -genkey -v \
-  -keystore android/app/simple-notes-release.jks \
-  -keyalg RSA \
-  -keysize 2048 \
-  -validity 10000 \
-  -alias simple-notes
-
-# You will be prompted for:
-# - Keystore password (remember this!)
-# - Key password (remember this!)
-# - Your name, organization, etc.
-```
-
-**Store these securely:**
-- Keystore password
-- Key password
-- Alias: `simple-notes`
-- Keystore file: `android/app/simple-notes-release.jks`
-
-⚠️ **BACKUP**: Make a backup of the keystore file in a secure location (NOT in the repository).
-
-## Step 2: Base64 Encode Keystore
-
-```bash
-# Create base64 encoded version
-base64 android/app/simple-notes-release.jks > simple-notes-release.jks.b64
-
-# Or on macOS:
-base64 -i android/app/simple-notes-release.jks -o simple-notes-release.jks.b64
-```
-
-## Step 3: Set GitHub Secrets
-
-Using GitHub CLI (recommended):
-
-```bash
-# Set KEYSTORE_BASE64 secret
-gh secret set KEYSTORE_BASE64 < simple-notes-release.jks.b64
-
-# Set KEYSTORE_PASSWORD (will prompt for input)
-gh secret set KEYSTORE_PASSWORD
-
-# Set KEY_PASSWORD (will prompt for input)
-gh secret set KEY_PASSWORD
-
-# Set KEY_ALIAS (value: simple-notes)
-printf "simple-notes" | gh secret set KEY_ALIAS
-```
-
-Or manually via GitHub web interface:
-1. Go to repository Settings → Secrets and variables → Actions
-2. Click "New repository secret"
-3. Add these secrets:
-   - `KEYSTORE_BASE64`: Paste content of `simple-notes-release.jks.b64`
-   - `KEYSTORE_PASSWORD`: Your keystore password
-   - `KEY_PASSWORD`: Your key password
-   - `KEY_ALIAS`: `simple-notes`
-
-## Step 4: Verify Setup
-
-```bash
-# Check secrets are set
-gh secret list
-
-# Expected output:
-# KEYSTORE_BASE64  Updated YYYY-MM-DD
-# KEYSTORE_PASSWORD  Updated YYYY-MM-DD
-# KEY_PASSWORD  Updated YYYY-MM-DD
-# KEY_ALIAS  Updated YYYY-MM-DD
-```
-
-## Step 5: Cleanup
-
-```bash
-# Remove sensitive files (they're in .gitignore, but double-check)
-rm simple-notes-release.jks.b64
-rm -f android/key.properties  # Generated by workflow
-
-# Verify keystore is NOT tracked by git
-git status | grep -i jks
-# Should return nothing
-```
-
-## Step 6: Trigger First Build
-
-```bash
-# Commit and push to main
-git add .
-git commit -m "🚀 feat: Add GitHub Actions deployment workflow"
-git push origin main
-
-# Or manually trigger workflow
-gh workflow run build-production-apk.yml
-```
-
-## Verification
-
-1. Go to GitHub repository → Actions tab
-2. Check workflow run status
-3. Once complete, go to Releases tab
-4. Verify release was created with 3 APK variants
-5. Download and test one of the APKs
-
-## Troubleshooting
-
-### Build fails with "Keystore not found"
-- Check `KEYSTORE_BASE64` secret is set correctly
-- Verify base64 encoding was done without line breaks
-
-### Build fails with "Incorrect password"
-- Verify `KEYSTORE_PASSWORD` and `KEY_PASSWORD` are correct
-- Re-set secrets if needed
-
-### APK files not found
-- Check build logs for errors in assembleRelease step
-- Verify APK output paths match workflow expectations
-
-### Updates don't work
-- Ensure you're using the same keystore for all builds
-- Verify `applicationId` in build.gradle.kts matches
-
-## Security Notes
-
-- ✅ Keystore is base64-encoded in GitHub secrets (secure)
-- ✅ Passwords are stored in GitHub secrets (encrypted)
-- ✅ `key.properties` and `.jks` files are in `.gitignore`
-- ⚠️ Never commit keystore files to repository
-- ⚠️ Keep backup of keystore in secure location
-- ⚠️ Don't share keystore passwords
-
-## Versioning
-
-Versions follow this pattern:
-- **Version Name**: `YYYY.MM.DD` (e.g., `2025.01.15`)
-- **Version Code**: GitHub run number (e.g., `42`)
-- **Release Tag**: `vYYYY.MM.DD-prod.BUILD` (e.g., `v2025.01.15-prod.42`)
-
-This ensures:
-- Semantic versioning based on release date
-- Incremental version codes for Play Store compatibility
-- Clear distinction between builds
-
-## APK Variants
-
-The workflow generates 3 APK variants:
-
-1. **Universal APK** (~5 MB)
-   - Works on all devices
-   - Larger file size
-   - Recommended for most users
-
-2. **arm64-v8a APK** (~3 MB)
-   - For modern devices (2018+)
-   - Smaller, faster
-   - 64-bit ARM processors
-
-3. **armeabi-v7a APK** (~3 MB)
-   - For older devices
-   - 32-bit ARM processors
-
-Users can choose based on their device - Obtanium auto-updates work with all variants.

QUICKSTART.en.md

@@ -0,0 +1,269 @@
+# Quick Start Guide - Simple Notes Sync 📝
+
+> Step-by-step installation and setup guide
+
+**🌍 Languages:** [Deutsch](QUICKSTART.md) · **English**
+
+---
+
+## Prerequisites
+
+- ✅ Android 8.0+ smartphone/tablet
+- ✅ WiFi connection
+- ✅ Own server with Docker (optional - for self-hosting)
+
+---
+
+## Option 1: With own server (Self-Hosted) 🏠
+
+### Step 1: Setup WebDAV Server
+
+On your server (e.g. Raspberry Pi, NAS, VPS):
+
+```bash
+# Clone repository
+git clone https://github.com/inventory69/simple-notes-sync.git
+cd simple-notes-sync/server
+
+# Configure environment variables
+cp .env.example .env
+nano .env
+```
+
+**Adjust in `.env`:**
+```env
+WEBDAV_PASSWORD=your-secure-password-here
+```
+
+**Start server:**
+```bash
+docker compose up -d
+```
+
+**Find IP address:**
+```bash
+ip addr show | grep "inet " | grep -v 127.0.0.1
+```
+
+➡️ **Note down:** `http://YOUR-SERVER-IP:8080/`
+
+---
+
+### Step 2: Install App
+
+1. **Download APK:** [Latest version](https://github.com/inventory69/simple-notes-sync/releases/latest)
+   - Choose: `simple-notes-sync-vX.X.X-standard-universal.apk`
+   
+2. **Allow installation:**
+   - Android: Settings → Security → Enable "Unknown sources" for your browser
+   
+3. **Open and install APK**
+
+---
+
+### Step 3: Configure App
+
+1. **Open app**
+
+2. **Open settings** (⚙️ icon top right)
+
+3. **Configure server settings:**
+   
+   | Field | Value |
+   |------|------|
+   | **WebDAV Server URL** | `http://YOUR-SERVER-IP:8080/` |
+   | **Username** | `noteuser` |
+   | **Password** | (your password from `.env`) |
+   | **Gateway SSID** | Name of your WiFi network |
+
+4. **Press "Test connection"**
+   - ✅ Success? → Continue to step 4
+   - ❌ Error? → See [Troubleshooting](#troubleshooting)
+
+5. **Enable auto-sync** (toggle switch)
+
+6. **Choose sync interval:**
+   - **15 min** - Maximum currency (~0.8% battery/day)
+   - **30 min** - Recommended (~0.4% battery/day) ⭐
+   - **60 min** - Maximum battery life (~0.2% battery/day)
+
+---
+
+### Step 4: Create First Note
+
+1. Back to main view (← arrow)
+
+2. **"Add note"** (+ icon)
+
+3. Enter title and text
+
+4. **Save** (💾 icon)
+
+5. **Wait for auto-sync** (or manually: ⚙️ → "Sync now")
+
+🎉 **Done!** Your notes will be automatically synchronized!
+
+---
+
+## Option 2: Local notes only (no server) 📱
+
+You can also use Simple Notes **without a server**:
+
+1. **Install app** (see step 2 above)
+
+2. **Use without server configuration:**
+   - Notes are only stored locally
+   - No auto-sync
+   - Perfect for offline-only use
+
+---
+
+## 🔋 Disable Battery Optimization
+
+For reliable auto-sync:
+
+1. **Settings** → **Apps** → **Simple Notes Sync**
+
+2. **Battery** → **Battery usage**
+
+3. Select: **"Don't optimize"** or **"Unrestricted"**
+
+💡 **Note:** Android Doze Mode may still delay sync in standby (~60 min). This is normal and affects all apps.
+
+---
+
+## 📊 Sync Intervals in Detail
+
+| Interval | Syncs/day | Battery/day | Battery/sync | Use case |
+|-----------|-----------|----------|-----------|----------------|
+| **15 min** | ~96 | ~0.8% (~23 mAh) | ~0.008% | ⚡ Maximum currency (multiple devices) |
+| **30 min** | ~48 | ~0.4% (~12 mAh) | ~0.008% | ✓ **Recommended** - balanced |
+| **60 min** | ~24 | ~0.2% (~6 mAh) | ~0.008% | 🔋 Maximum battery life |
+
+---
+
+## 🐛 Troubleshooting
+
+### Connection test fails
+
+**Problem:** "Connection failed" during test
+
+**Solutions:**
+
+1. **Server running?**
+   ```bash
+   docker compose ps
+   # Should show "Up"
+   ```
+
+2. **Same WiFi?**
+   - Smartphone and server must be on same network
+   - Check SSID in app settings
+
+3. **IP address correct?**
+   ```bash
+   ip addr show | grep "inet "
+   # Check if IP in URL matches
+   ```
+
+4. **Firewall?**
+   ```bash
+   # Open port 8080 (if firewall active)
+   sudo ufw allow 8080/tcp
+   ```
+
+5. **Check server logs:**
+   ```bash
+   docker compose logs -f
+   ```
+
+---
+
+### Auto-sync not working
+
+**Problem:** Notes are not automatically synchronized
+
+**Solutions:**
+
+1. **Auto-sync enabled?**
+   - ⚙️ Settings → Toggle "Auto-sync" must be **ON**
+
+2. **Battery optimization disabled?**
+   - See [Disable Battery Optimization](#-disable-battery-optimization)
+
+3. **On correct WiFi?**
+   - Sync only works when SSID = Gateway SSID
+   - Check current SSID in Android settings
+
+4. **Test manually:**
+   - ⚙️ Settings → "Sync now"
+   - Works? → Auto-sync should work too
+
+---
+
+### Notes not showing up
+
+**Problem:** After installation, no notes visible even though they exist on server
+
+**Solution:**
+
+1. **Manually sync once:**
+   - ⚙️ Settings → "Sync now"
+
+2. **Check server data:**
+   ```bash
+   docker compose exec webdav ls -la /data/
+   # Should show .json files
+   ```
+
+---
+
+### Sync errors
+
+**Problem:** Error message during sync
+
+**Solutions:**
+
+1. **"401 Unauthorized"** → Wrong password
+   - Check password in app settings
+   - Compare with `.env` on server
+
+2. **"404 Not Found"** → Wrong URL
+   - Should end with `/` (e.g. `http://192.168.1.100:8080/`)
+
+3. **"Network error"** → No connection
+   - See [Connection test fails](#connection-test-fails)
+
+---
+
+## 📱 Updates
+
+### Automatic with Obtainium (recommended)
+
+1. **[Install Obtainium](https://github.com/ImranR98/Obtanium/releases/latest)**
+
+2. **Add app:**
+   - URL: `https://github.com/inventory69/simple-notes-sync`
+   - Enable auto-update
+
+3. **Done!** Obtainium notifies you of new versions
+
+### Manual
+
+1. Download new APK from [Releases](https://github.com/inventory69/simple-notes-sync/releases/latest)
+
+2. Install (overwrites old version)
+
+3. All data remains intact!
+
+---
+
+## 🆘 Further Help
+
+- **GitHub Issues:** [Report problem](https://github.com/inventory69/simple-notes-sync/issues)
+- **Complete docs:** [DOCS.en.md](DOCS.en.md)
+- **Server setup details:** [server/README.en.md](server/README.en.md)
+
+---
+
+**Version:** 1.1.0 · **Created:** December 2025

QUICKSTART.md

@@ -1,208 +1,269 @@
-# 🚀 Quick Start Guide
+# Quick Start Guide - Simple Notes Sync 📝
 
-## ✅ Server ist bereits gestartet!
+> Schritt-für-Schritt Anleitung zur Installation und Einrichtung
 
-Der WebDAV-Server läuft bereits auf:
-- **Lokal:** `http://localhost:8080/`
-- **Im Netzwerk:** `http://192.168.0.188:8080/`
-
-### Credentials
-- **Username:** `noteuser`
-- **Password:** `SimpleNotes2025!`
-
-## 📱 Nächste Schritte: Android App erstellen
-
-### Option 1: Mit Android Studio (Empfohlen)
-
-1. **Android Studio öffnen**
-   ```
-   File → New → New Project
-   ```
-
-2. **Template wählen:**
-   - Empty Views Activity
-
-3. **Projekt konfigurieren:**
-   ```
-   Name: Simple Notes
-   Package: com.example.simplenotes
-   Save location: /home/liq/gitProjects/simple-notes-sync/android/
-   Language: Kotlin
-   Minimum SDK: API 24 (Android 7.0)
-   Build configuration: Kotlin DSL
-   ```
-
-4. **Dependencies hinzufügen:**
-   
-   Öffne `app/build.gradle.kts` und füge hinzu:
-   ```kotlin
-   dependencies {
-       // ... existing dependencies
-       
-       // WebDAV
-       implementation("com.github.thegrizzlylabs:sardine-android:0.8")
-       
-       // Coroutines
-       implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3")
-       
-       // JSON
-       implementation("com.google.code.gson:gson:2.10.1")
-       
-       // WorkManager
-       implementation("androidx.work:work-runtime-ktx:2.9.0")
-   }
-   ```
-   
-   Und in `settings.gradle.kts`:
-   ```kotlin
-   dependencyResolutionManagement {
-       repositories {
-           google()
-           mavenCentral()
-           maven { url = uri("https://jitpack.io") }  // Für Sardine
-       }
-   }
-   ```
-
-5. **Code implementieren:**
-   
-   Alle Code-Beispiele findest du in:
-   - [ANDROID_GUIDE.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/ANDROID_GUIDE.md)
-   
-   Kopiere der Reihe nach:
-   - `models/Note.kt`
-   - `models/SyncStatus.kt`
-   - `storage/NotesStorage.kt`
-   - `utils/DeviceIdGenerator.kt`
-   - `utils/NotificationHelper.kt`
-   - `utils/Extensions.kt`
-   - `utils/Constants.kt`
-   - UI Layouts aus dem Guide
-   - Activities (MainActivity, NoteEditorActivity, SettingsActivity)
-   - `sync/WebDavSyncService.kt`
-   - `sync/WifiSyncReceiver.kt`
-   - `sync/SyncWorker.kt`
-   - `adapters/NotesAdapter.kt`
-
-6. **AndroidManifest.xml anpassen:**
-   ```xml
-   <uses-permission android:name="android.permission.INTERNET" />
-   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
-   <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
-   
-   <application
-       ...
-       android:usesCleartextTraffic="true">
-   ```
-
-7. **Build & Run:**
-   ```
-   Build → Make Project
-   Run → Run 'app'
-   ```
-
-8. **In der App konfigurieren:**
-   - Einstellungen öffnen
-   - Server URL: `http://192.168.0.188:8080/`
-   - Username: `noteuser`
-   - Password: `SimpleNotes2025!`
-   - Heim-WLAN SSID: `DeinWLANName`
-   - "Verbindung testen" → sollte erfolgreich sein ✓
-
-### Option 2: Schritt-für-Schritt Implementation
-
-Folge dem [IMPLEMENTATION_PLAN.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/IMPLEMENTATION_PLAN.md) mit 6 Sprints:
-
-1. **Sprint 1:** Server & Foundation (bereits done ✓)
-2. **Sprint 2:** Basic UI (4-6h)
-3. **Sprint 3:** Settings & WebDAV (6h)
-4. **Sprint 4:** Auto-Sync (6h)
-5. **Sprint 5:** Conflicts & Errors (6h)
-6. **Sprint 6:** Polish & Testing (6h)
-
-## 🧪 Server testen
-
-Der Server läuft bereits. Teste ihn:
-
-```bash
-# Einfacher Test
-curl -u noteuser:SimpleNotes2025! http://localhost:8080/
-
-# Test-Notiz hochladen
-echo '{"id":"test-123","title":"Test","content":"Hello World","createdAt":1703001234567,"updatedAt":1703001234567,"deviceId":"test","syncStatus":"SYNCED"}' > test.json
-
-curl -u noteuser:SimpleNotes2025! \
-  -T test.json \
-  http://localhost:8080/test.json
-
-# Test-Notiz abrufen
-curl -u noteuser:SimpleNotes2025! http://localhost:8080/test.json
-
-# Löschen
-curl -u noteuser:SimpleNotes2025! \
-  -X DELETE \
-  http://localhost:8080/test.json
-```
-
-## 📊 Server Management
-
-```bash
-cd /home/liq/gitProjects/simple-notes-sync/server
-
-# Status
-docker-compose ps
-
-# Logs
-docker-compose logs -f
-
-# Stoppen
-docker-compose down
-
-# Neu starten
-docker-compose up -d
-
-# Daten ansehen
-ls -la notes-data/
-```
-
-## 🔧 Troubleshooting
-
-### Server nicht erreichbar von Android
-
-1. **Firewall prüfen:**
-   ```bash
-   sudo ufw status
-   sudo ufw allow 8080
-   ```
-
-2. **Ping-Test:**
-   ```bash
-   ping 192.168.0.188
-   ```
-
-3. **Port-Test:**
-   ```bash
-   telnet 192.168.0.188 8080
-   ```
-
-### Permission Denied in Android
-
-- Android 13+: POST_NOTIFICATIONS Permission akzeptieren
-- Internet Permission in Manifest vorhanden?
-- `usesCleartextTraffic="true"` gesetzt?
-
-## 📚 Weitere Hilfe
-
-- **Vollständige Doku:** [project-docs/simple-notes-sync](https://github.com/inventory69/project-docs/tree/main/simple-notes-sync)
-- **Android Code:** [ANDROID_GUIDE.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/ANDROID_GUIDE.md)
-- **Server Setup:** [SERVER_SETUP.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/SERVER_SETUP.md)
-- **Notifications:** [NOTIFICATIONS.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/NOTIFICATIONS.md)
+**🌍 Sprachen:** **Deutsch** · [English](QUICKSTART.en.md)
 
 ---
 
-**Server Status:** ✅ Running on `http://192.168.0.188:8080/`
-**Next:** Android App in Android Studio erstellen
-**Estimated Time:** 18-24 Stunden für vollständige App
+## Voraussetzungen
 
-Viel Erfolg! 🚀
+- ✅ Android 8.0+ Smartphone/Tablet
+- ✅ WLAN-Verbindung
+- ✅ Eigener Server mit Docker (optional - für Self-Hosting)
+
+---
+
+## Option 1: Mit eigenem Server (Self-Hosted) 🏠
+
+### Schritt 1: WebDAV Server einrichten
+
+Auf deinem Server (z.B. Raspberry Pi, NAS, VPS):
+
+```bash
+# Repository klonen
+git clone https://github.com/inventory69/simple-notes-sync.git
+cd simple-notes-sync/server
+
+# Umgebungsvariablen konfigurieren
+cp .env.example .env
+nano .env
+```
+
+**In `.env` anpassen:**
+```env
+WEBDAV_PASSWORD=dein-sicheres-passwort-hier
+```
+
+**Server starten:**
+```bash
+docker compose up -d
+```
+
+**IP-Adresse finden:**
+```bash
+ip addr show | grep "inet " | grep -v 127.0.0.1
+```
+
+➡️ **Notiere dir:** `http://DEINE-SERVER-IP:8080/`
+
+---
+
+### Schritt 2: App installieren
+
+1. **APK herunterladen:** [Neueste Version](https://github.com/inventory69/simple-notes-sync/releases/latest)
+   - Wähle: `simple-notes-sync-vX.X.X-standard-universal.apk`
+   
+2. **Installation erlauben:**
+   - Android: Einstellungen → Sicherheit → "Unbekannte Quellen" für deinen Browser aktivieren
+   
+3. **APK öffnen und installieren**
+
+---
+
+### Schritt 3: App konfigurieren
+
+1. **App öffnen**
+
+2. **Einstellungen öffnen** (⚙️ Icon oben rechts)
+
+3. **Server-Einstellungen konfigurieren:**
+   
+   | Feld | Wert |
+   |------|------|
+   | **WebDAV Server URL** | `http://DEINE-SERVER-IP:8080/` |
+   | **Benutzername** | `noteuser` |
+   | **Passwort** | (dein Passwort aus `.env`) |
+   | **Gateway SSID** | Name deines WLAN-Netzwerks |
+
+4. **"Verbindung testen"** drücken
+   - ✅ Erfolg? → Weiter zu Schritt 4
+   - ❌ Fehler? → Siehe [Troubleshooting](#troubleshooting)
+
+5. **Auto-Sync aktivieren** (Toggle Switch)
+
+6. **Sync-Intervall wählen:**
+   - **15 Min** - Maximale Aktualität (~0.8% Akku/Tag)
+   - **30 Min** - Empfohlen (~0.4% Akku/Tag) ⭐
+   - **60 Min** - Maximale Akkulaufzeit (~0.2% Akku/Tag)
+
+---
+
+### Schritt 4: Erste Notiz erstellen
+
+1. Zurück zur Hauptansicht (← Pfeil)
+
+2. **"Notiz hinzufügen"** (+ Icon)
+
+3. Titel und Text eingeben
+
+4. **Speichern** (💾 Icon)
+
+5. **Warten auf Auto-Sync** (oder manuell: ⚙️ → "Jetzt synchronisieren")
+
+🎉 **Fertig!** Deine Notizen werden automatisch synchronisiert!
+
+---
+
+## Option 2: Nur lokale Notizen (kein Server) 📱
+
+Du kannst Simple Notes auch **ohne Server** nutzen:
+
+1. **App installieren** (siehe Schritt 2 oben)
+
+2. **Ohne Server-Konfiguration verwenden:**
+   - Notizen werden nur lokal gespeichert
+   - Kein Auto-Sync
+   - Perfekt für reine Offline-Nutzung
+
+---
+
+## 🔋 Akku-Optimierung deaktivieren
+
+Für zuverlässigen Auto-Sync:
+
+1. **Einstellungen** → **Apps** → **Simple Notes Sync**
+
+2. **Akku** → **Akkuverbrauch**
+
+3. Wähle: **"Nicht optimieren"** oder **"Unbeschränkt"**
+
+💡 **Hinweis:** Android Doze Mode kann trotzdem Sync im Standby verzögern (~60 Min). Das ist normal und betrifft alle Apps.
+
+---
+
+## 📊 Sync-Intervalle im Detail
+
+| Intervall | Syncs/Tag | Akku/Tag | Akku/Sync | Anwendungsfall |
+|-----------|-----------|----------|-----------|----------------|
+| **15 Min** | ~96 | ~0.8% (~23 mAh) | ~0.008% | ⚡ Maximal aktuell (mehrere Geräte) |
+| **30 Min** | ~48 | ~0.4% (~12 mAh) | ~0.008% | ✓ **Empfohlen** - ausgewogen |
+| **60 Min** | ~24 | ~0.2% (~6 mAh) | ~0.008% | 🔋 Maximale Akkulaufzeit |
+
+---
+
+## 🐛 Troubleshooting
+
+### Verbindungstest schlägt fehl
+
+**Problem:** "Verbindung fehlgeschlagen" beim Test
+
+**Lösungen:**
+
+1. **Server läuft?**
+   ```bash
+   docker compose ps
+   # Sollte "Up" zeigen
+   ```
+
+2. **Gleiche WLAN?**
+   - Smartphone und Server müssen im selben Netzwerk sein
+   - Prüfe SSID in App-Einstellungen
+
+3. **IP-Adresse korrekt?**
+   ```bash
+   ip addr show | grep "inet "
+   # Prüfe ob IP in URL stimmt
+   ```
+
+4. **Firewall?**
+   ```bash
+   # Port 8080 öffnen (falls Firewall aktiv)
+   sudo ufw allow 8080/tcp
+   ```
+
+5. **Server-Logs prüfen:**
+   ```bash
+   docker compose logs -f
+   ```
+
+---
+
+### Auto-Sync funktioniert nicht
+
+**Problem:** Notizen werden nicht automatisch synchronisiert
+
+**Lösungen:**
+
+1. **Auto-Sync aktiviert?**
+   - ⚙️ Einstellungen → Toggle "Auto-Sync" muss **AN** sein
+
+2. **Akku-Optimierung deaktiviert?**
+   - Siehe [Akku-Optimierung](#-akku-optimierung-deaktivieren)
+
+3. **Im richtigen WLAN?**
+   - Sync funktioniert nur wenn SSID = Gateway SSID
+   - Prüfe aktuelle SSID in Android-Einstellungen
+
+4. **Manuell testen:**
+   - ⚙️ Einstellungen → "Jetzt synchronisieren"
+   - Funktioniert das? → Auto-Sync sollte auch funktionieren
+
+---
+
+### Notizen werden nicht angezeigt
+
+**Problem:** Nach Installation sind keine Notizen da, obwohl welche auf dem Server liegen
+
+**Lösung:**
+
+1. **Einmalig manuell synchronisieren:**
+   - ⚙️ Einstellungen → "Jetzt synchronisieren"
+
+2. **Server-Daten prüfen:**
+   ```bash
+   docker compose exec webdav ls -la /data/
+   # Sollte .json Dateien zeigen
+   ```
+
+---
+
+### Fehler beim Sync
+
+**Problem:** Fehlermeldung beim Synchronisieren
+
+**Lösungen:**
+
+1. **"401 Unauthorized"** → Passwort falsch
+   - Prüfe Passwort in App-Einstellungen
+   - Vergleiche mit `.env` auf Server
+
+2. **"404 Not Found"** → URL falsch
+   - Sollte enden mit `/` (z.B. `http://192.168.1.100:8080/`)
+
+3. **"Network error"** → Keine Verbindung
+   - Siehe [Verbindungstest schlägt fehl](#verbindungstest-schlägt-fehl)
+
+---
+
+## 📱 Updates
+
+### Automatisch mit Obtainium (empfohlen)
+
+1. **[Obtainium installieren](https://github.com/ImranR98/Obtanium/releases/latest)**
+
+2. **App hinzufügen:**
+   - URL: `https://github.com/inventory69/simple-notes-sync`
+   - Auto-Update aktivieren
+
+3. **Fertig!** Obtainium benachrichtigt dich bei neuen Versionen
+
+### Manuell
+
+1. Neue APK von [Releases](https://github.com/inventory69/simple-notes-sync/releases/latest) herunterladen
+
+2. Installieren (überschreibt alte Version)
+
+3. Alle Daten bleiben erhalten!
+
+---
+
+## 🆘 Weitere Hilfe
+
+- **GitHub Issues:** [Problem melden](https://github.com/inventory69/simple-notes-sync/issues)
+- **Vollständige Docs:** [DOCS.md](DOCS.md)
+- **Server Setup Details:** [server/README.md](server/README.md)
+
+---
+
+**Version:** 1.1.0 · **Erstellt:** Dezember 2025

README.en.md

@@ -0,0 +1,108 @@
+# Simple Notes Sync 📝
+
+> Minimalist offline notes with auto-sync to your own server
+
+[![Android](https://img.shields.io/badge/Android-8.0%2B-green.svg)](https://www.android.com/)
+[![Material Design 3](https://img.shields.io/badge/Material-Design%203-green.svg)](https://m3.material.io/)
+[![License](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+
+**📱 [APK Download](https://github.com/inventory69/simple-notes-sync/releases/latest)** · **📖 [Documentation](DOCS.en.md)** · **🚀 [Quick Start](QUICKSTART.en.md)**
+
+**🌍 Languages:** [Deutsch](README.md) · **English**
+
+---
+
+## 📱 Screenshots
+
+<p align="center">
+  <img src="fastlane/metadata/android/de-DE/images/phoneScreenshots/1.jpg" width="250" alt="Notes list">
+  <img src="fastlane/metadata/android/de-DE/images/phoneScreenshots/2.jpg" width="250" alt="Edit note">
+  <img src="fastlane/metadata/android/de-DE/images/phoneScreenshots/3.jpg" width="250" alt="Settings">
+</p>
+
+---
+
+## Features
+
+### 📝 Notes
+- Create and edit simple text notes
+- Automatic save
+- Swipe-to-delete with confirmation
+
+### 🔄 Synchronization
+- Auto-sync (15/30/60 min intervals)
+- WiFi-based - Sync on home WiFi connection
+- Server check (2s timeout) - No errors in foreign networks
+- Conflict-free merging via timestamps
+
+### 🏠 Self-Hosted & Privacy
+- WebDAV server (Nextcloud, ownCloud, etc.)
+- Your data stays with you - No tracking, no analytics
+- 100% Open Source (MIT license)
+
+### 🔋 Performance
+- Battery-friendly (~0.2-0.8% per day)
+- Doze Mode optimized
+- Offline-first - All features work without internet
+
+### 🎨 Material Design 3
+- Dynamic Colors (Material You)
+- Dark Mode
+- Modern, intuitive UI
+
+---
+
+## 🚀 Quick Start
+
+### 1. Server Setup
+
+```bash
+cd server
+cp .env.example .env
+# Set password in .env
+docker compose up -d
+```
+
+➡️ **Details:** [Server Setup Guide](server/README.en.md)
+
+### 2. App Installation
+
+1. [Download APK](https://github.com/inventory69/simple-notes-sync/releases/latest)
+2. Install & open
+3. ⚙️ Settings → Configure server
+4. Enable auto-sync
+
+➡️ **Details:** [Complete guide](QUICKSTART.en.md)
+
+---
+
+## 📚 Documentation
+
+- **[Quick Start Guide](QUICKSTART.en.md)** - Step-by-step guide for end users
+- **[Server Setup](server/README.en.md)** - Configure WebDAV server
+- **[Complete Docs](DOCS.en.md)** - Features, troubleshooting, build instructions
+
+---
+
+## 🛠️ Development
+
+```bash
+cd android
+./gradlew assembleStandardRelease
+```
+
+➡️ **Details:** [Build instructions in DOCS.en.md](DOCS.en.md)
+
+---
+
+## 🤝 Contributing
+
+Contributions are welcome! See [CONTRIBUTING.md](CONTRIBUTING.md) for details.
+
+---
+
+## 📄 License
+
+MIT License - see [LICENSE](LICENSE)
+
+**v1.1.1** · Built with Kotlin + Material Design 3

README.md

@@ -1,130 +1,103 @@
 # Simple Notes Sync 📝
 
-> **Minimalistische Android Notiz-App mit automatischer WLAN-Synchronisierung**
+> Minimalistische Offline-Notizen mit Auto-Sync zu deinem eigenen Server
 
 [![Android](https://img.shields.io/badge/Android-8.0%2B-green.svg)](https://www.android.com/)
-[![Kotlin](https://img.shields.io/badge/Kotlin-1.9%2B-blue.svg)](https://kotlinlang.org/)
 [![Material Design 3](https://img.shields.io/badge/Material-Design%203-green.svg)](https://m3.material.io/)
 [![License](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 
-Schlanke Offline-Notizen ohne Schnickschnack - deine Daten bleiben bei dir. Automatische Synchronisierung zu deinem eigenen WebDAV-Server, kein Google, kein Microsoft, keine Cloud.
+**📱 [APK Download](https://github.com/inventory69/simple-notes-sync/releases/latest)** · **📖 [Dokumentation](DOCS.md)** · **🚀 [Quick Start](QUICKSTART.md)**
 
-## ✨ Features
-
-- 📝 **Offline-First** - Notizen lokal gespeichert, immer verfügbar
-- 🔄 **Auto-Sync** - Konfigurierbare Intervalle (15/30/60 Min.) mit ~0.2-0.8% Akku/Tag
-- 🏠 **Self-Hosted** - Deine Daten auf deinem Server (WebDAV)
-- 🎨 **Material Design 3** - Modern & Dynamic Theming
-- 🔋 **Akkuschonend** - Optimiert für Hintergrund-Synchronisierung
-- 🔐 **Privacy-First** - Kein Tracking, keine Analytics, keine Cloud
-- 🚫 **Keine Berechtigungen** - Nur Internet für WebDAV Sync
-
-## 📥 Quick Download
-
-**Android APK:** [📱 Neueste Version herunterladen](https://github.com/inventory69/simple-notes-sync/releases/latest)
-
-💡 **Tipp:** Nutze [Obtainium](https://github.com/ImranR98/Obtainium) für automatische Updates!
+**🌍 Sprachen:** **Deutsch** · [English](README.en.md)
 
 ---
 
-## 🚀 Schnellstart
+## 📱 Screenshots
 
-### 1️⃣ WebDAV Server starten
+<p align="center">
+  <img src="fastlane/metadata/android/de-DE/images/phoneScreenshots/1.jpg" width="250" alt="Notizliste">
+  <img src="fastlane/metadata/android/de-DE/images/phoneScreenshots/2.jpg" width="250" alt="Notiz bearbeiten">
+  <img src="fastlane/metadata/android/de-DE/images/phoneScreenshots/3.jpg" width="250" alt="Einstellungen">
+</p>
 
-```fish
+---
+
+## Features
+
+### 📝 Notizen
+- Einfache Textnotizen erstellen und bearbeiten
+- Automatisches Speichern
+- Swipe-to-Delete mit Bestätigung
+
+### 🔄 Synchronisation
+- Auto-Sync (15/30/60 Min Intervalle)
+- WiFi-basiert - Sync bei Heim-WLAN-Verbindung
+- Server-Check (2s Timeout) - Keine Fehler in fremden Netzwerken
+- Konfliktfreies Merging via Timestamps
+
+### 🏠 Self-Hosted & Privacy
+- WebDAV-Server (Nextcloud, ownCloud, etc.)
+- Deine Daten bei dir - Kein Tracking, keine Analytics
+- 100% Open Source (MIT Lizenz)
+
+### 🔋 Performance
+- Akkuschonend (~0.2-0.8% pro Tag)
+- Doze Mode optimiert
+- Offline-First - Alle Features ohne Internet
+
+### 🎨 Material Design 3
+- Dynamic Colors (Material You)
+- Dark Mode
+- Moderne, intuitive UI
+
+---
+
+## 🚀 Quick Start
+
+### 1. Server Setup
+
+```bash
 cd server
 cp .env.example .env
-# Passwort in .env anpassen
+# Passwort in .env setzen
 docker compose up -d
 ```
 
-### 2️⃣ App installieren & konfigurieren
+➡️ **Details:** [Server Setup Guide](server/README.md)
 
-1. APK herunterladen und installieren
-2. App öffnen → **Einstellungen** (⚙️)
-3. Server konfigurieren:
-   - URL: `http://192.168.0.XXX:8080/notes`
-   - Benutzername: `noteuser`
-   - Passwort: (aus `.env`)
-4. **Auto-Sync aktivieren**
-5. **Sync-Intervall wählen** (15/30/60 Min.)
+### 2. App Installation
 
-**Fertig!** Notizen werden automatisch synchronisiert 🎉
+1. [APK herunterladen](https://github.com/inventory69/simple-notes-sync/releases/latest)
+2. Installieren & öffnen
+3. ⚙️ Einstellungen → Server konfigurieren
+4. Auto-Sync aktivieren
+
+➡️ **Details:** [Vollständige Anleitung](QUICKSTART.md)
 
 ---
 
-## ⚙️ Sync-Intervalle
+## 📚 Dokumentation
 
-| Intervall | Akku/Tag | Anwendungsfall |
-|-----------|----------|----------------|
-| **15 Min** | ~0.8% (~23 mAh) | ⚡ Maximale Aktualität |
-| **30 Min** | ~0.4% (~12 mAh) | ✓ Empfohlen - Ausgewogen |
-| **60 Min** | ~0.2% (~6 mAh) | 🔋 Maximale Akkulaufzeit |
-
-💡 **Hinweis:** Android Doze Mode kann Sync im Standby auf ~60 Min. verzögern (betrifft alle Apps).
+- **[Quick Start Guide](QUICKSTART.md)** - Schritt-für-Schritt Anleitung für Endbenutzer
+- **[Server Setup](server/README.md)** - WebDAV Server konfigurieren
+- **[Vollständige Docs](DOCS.md)** - Features, Troubleshooting, Build-Anleitung
 
 ---
 
-## <EFBFBD> Neue Features in v1.1.0
+## 🛠️ Entwicklung
 
-### Konfigurierbare Sync-Intervalle
-- ⏱️ Wählbare Intervalle: 15/30/60 Minuten
-- 📊 Transparente Akkuverbrauchs-Anzeige
-- <20> Sofortige Anwendung ohne App-Neustart
-
-### Über-Sektion
-- <20> App-Version & Build-Datum
-- 🌐 Links zu GitHub Repo & Entwickler
-- ⚖️ Lizenz-Information
-
-### Verbesserungen
-- 🎯 Benutzerfreundliche Doze-Mode Erklärung
-- 🔕 Keine störenden Sync-Fehler Toasts im Hintergrund
-- 📝 Erweiterte Debug-Logs für Troubleshooting
-
----
-
-## 🛠️ Selbst bauen
-
-```fish
+```bash
 cd android
 ./gradlew assembleStandardRelease
-# APK: android/app/build/outputs/apk/standard/release/
 ```
 
----
-
-## 🐛 Troubleshooting
-
-### Auto-Sync funktioniert nicht
-
-1. **Akku-Optimierung deaktivieren**
-   - Einstellungen → Apps → Simple Notes → Akku → Nicht optimieren
-2. **WLAN-Verbindung prüfen**
-   - Funktioniert nur im selben Netzwerk wie Server
-3. **Server-Status checken**
-   - Settings → "Verbindung testen"
-
-### Server nicht erreichbar
-
-```fish
-# Status prüfen
-docker compose ps
-
-# Logs ansehen
-docker compose logs -f
-
-# IP-Adresse finden
-ip addr show | grep "inet " | grep -v 127.0.0.1
-```
-
-Mehr Details: [📖 Dokumentation](DOCS.md)
+➡️ **Details:** [Build-Anleitung in DOCS.md](DOCS.md)
 
 ---
 
 ## 🤝 Contributing
 
-Contributions sind willkommen! Bitte öffne ein Issue oder Pull Request.
+Beiträge sind willkommen! Siehe [CONTRIBUTING.md](CONTRIBUTING.md) für Details.
 
 ---
 
@@ -132,6 +105,4 @@ Contributions sind willkommen! Bitte öffne ein Issue oder Pull Request.
 
 MIT License - siehe [LICENSE](LICENSE)
 
----
-
-**Version:** 1.1.0 · **Status:** ✅ Produktiv · **Gebaut mit:** Kotlin + Material Design 3
+**v1.1.1** · Gebaut mit Kotlin + Material Design 3

README.old.md

@@ -1,335 +0,0 @@
-# Simple Notes Sync 📝
-
-> Minimalistische Android-App für Offline-Notizen mit automatischer WLAN-Synchronisierung
-
-Eine schlanke Notiz-App ohne Schnickschnack - perfekt für schnelle Gedanken, die automatisch zu Hause synchronisiert werden.
-
----
-
-## ✨ Features
-
-- 📝 **Offline-first** - Notizen werden lokal gespeichert und sind immer verfügbar
-- 🔄 **Auto-Sync** - Automatische Synchronisierung wenn du im Heimnetzwerk bist
-- 🏠 **WebDAV Server** - Deine Daten bleiben bei dir (Docker-Container)
-- 🔋 **Akkuschonend** - Nur ~0.4% Akkuverbrauch pro Tag
-- 🚫 **Keine Cloud** - Keine Google, keine Microsoft, keine Drittanbieter
-- 🔐 **Privacy** - Keine Tracking, keine Analytics, keine Standort-Berechtigungen
-
----
-
-## 📥 Installation
-
-### Android App
-
-**Option 1: APK herunterladen**
-
-1. Neueste [Release](../../releases/latest) öffnen
-2. `app-debug.apk` herunterladen
-3. APK auf dem Handy installieren
-
-**Option 2: Selbst bauen**
-
-```bash
-cd android
-./gradlew assembleDebug
-# APK: android/app/build/outputs/apk/debug/app-debug.apk
-```
-
-### WebDAV Server
-
-Der Server läuft als Docker-Container und speichert deine Notizen.
-
-```bash
-cd server
-cp .env.example .env
-nano .env  # Passwort anpassen!
-docker-compose up -d
-```
-
-**Server testen:**
-```bash
-curl -u noteuser:dein_passwort http://192.168.0.XXX:8080/
-```
-
----
-
-## 🚀 Schnellstart
-
-1. **Server starten** (siehe oben)
-2. **App installieren** und öffnen
-3. **Einstellungen öffnen** (⚙️ Symbol oben rechts)
-4. **Server konfigurieren:**
-   - Server-URL: `http://192.168.0.XXX:8080/notes`
-   - Benutzername: `noteuser`
-   - Passwort: (aus `.env` Datei)
-   - Auto-Sync: **AN**
-5. **Fertig!** Notizen werden jetzt automatisch synchronisiert
-
----
-
-## 💡 Wie funktioniert Auto-Sync?
-
-Die App prüft **alle 30 Minuten**, ob:
-- ✅ WLAN verbunden ist
-- ✅ Server im gleichen Netzwerk erreichbar ist
-- ✅ Neue Notizen vorhanden sind
-
-Wenn alle Bedingungen erfüllt → **Automatische Synchronisierung**
-
-**Wichtig:** Funktioniert nur im selben Netzwerk wie der Server (kein Internet-Zugriff nötig!)
-
----
-
-## 🔋 Akkuverbrauch
-
-| Komponente | Verbrauch/Tag |
-|------------|---------------|
-| WorkManager (alle 30 Min) | ~0.3% |
-| Netzwerk-Checks | ~0.1% |
-| **Total** | **~0.4%** |
-
-Bei einem 3000 mAh Akku entspricht das ~12 mAh pro Tag.
-
----
-
-## 📱 Screenshots
-
-_TODO: Screenshots hinzufügen_
-
----
-
-## 🛠️ Technische Details
-
-Mehr Infos zur Architektur und Implementierung findest du in der [technischen Dokumentation](DOCS.md).
-
-**Stack:**
-- **Android:** Kotlin, Material Design 3, WorkManager
-- **Server:** Docker, WebDAV (bytemark/webdav)
-- **Sync:** Sardine Android (WebDAV Client)
-
----
-
-## 📄 Lizenz
-
-[Lizenz hier einfügen]
-
----
-
-## 🤝 Beitragen
-
-Contributions sind willkommen! Bitte öffne ein Issue oder Pull Request.
-
----
-
-## 📄 Lizenz
-
-MIT License - siehe [LICENSE](LICENSE)
-
----
-
-**Projekt Start:** 19. Dezember 2025  
-**Status:** ✅ Funktional & Produktiv
-
-## 📖 Dokumentation
-
-### In diesem Repository:
-
-- **[QUICKSTART.md](QUICKSTART.md)** - Schnellstart-Anleitung
-- **[server/README.md](server/README.md)** - Server-Verwaltung
-
-### Vollständige Dokumentation (project-docs):
-
-- [README.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/README.md) - Projekt-Übersicht & Architektur
-- [IMPLEMENTATION_PLAN.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/IMPLEMENTATION_PLAN.md) - Detaillierter Sprint-Plan
-- [SERVER_SETUP.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/SERVER_SETUP.md) - Server-Setup Details
-- [ANDROID_GUIDE.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/ANDROID_GUIDE.md) - 📱 Kompletter Android-Code
-- [NOTIFICATIONS.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/NOTIFICATIONS.md) - Notification-System Details
-- [WINDOWS_SETUP.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/WINDOWS_SETUP.md) - 🪟 Windows + Android Studio Setup
-- [CODE_REFERENCE.md](https://github.com/inventory69/project-docs/blob/main/simple-notes-sync/CODE_REFERENCE.md) - Schnelle Code-Referenz
-
-## ⚙️ Server Konfiguration
-
-**Standard-Credentials:**
-- Username: `noteuser`
-- Password: Siehe `.env` im `server/` Verzeichnis
-
-**Server-URL:**
-- Lokal: `http://localhost:8080/`
-- Im Netzwerk: `http://YOUR_IP:8080/`
-
-IP-Adresse finden:
-```bash
-ip addr show | grep "inet " | grep -v 127.0.0.1
-```
-
-## 📱 Android App Setup
-
-### Vorraussetzungen
-
-- Android Studio Hedgehog (2023.1.1) oder neuer
-- JDK 17
-- Min SDK 24 (Android 7.0)
-- Target SDK 34 (Android 14)
-
-### In App konfigurieren
-
-1. App starten
-2. Einstellungen öffnen
-3. Server-URL eintragen (z.B. `http://192.168.1.100:8080/`)
-4. Username & Passwort eingeben
-5. Heim-WLAN SSID eingeben
-6. "Verbindung testen"
-
-## 🔧 Entwicklung
-
-### Server-Management
-
-```bash
-# Status prüfen
-docker-compose ps
-
-# Logs anschauen
-docker-compose logs -f
-
-# Neustarten
-docker-compose restart
-
-# Stoppen
-docker-compose down
-```
-
-### Android-Build
-
-```bash
-cd android
-./gradlew assembleDebug
-
-# APK Location:
-# app/build/outputs/apk/debug/app-debug.apk
-```
-
-## 🧪 Testing
-
-### Server-Test
-
-```bash
-# Testdatei hochladen
-echo '{"id":"test","title":"Test","content":"Hello"}' > test.json
-curl -u noteuser:password -T test.json http://localhost:8080/test.json
-
-# Datei abrufen
-curl -u noteuser:password http://localhost:8080/test.json
-
-# Datei löschen
-curl -u noteuser:password -X DELETE http://localhost:8080/test.json
-```
-
-### Android-App
-
-1. Notiz erstellen → speichern → in Liste sichtbar ✓
-2. WLAN verbinden → Auto-Sync ✓
-3. Server offline → Fehlermeldung ✓
-4. Konflikt-Szenario → Auflösung ✓
-
-## 📦 Deployment
-
-### Server (Production)
-
-**Option 1: Lokaler Server (Raspberry Pi, etc.)**
-```bash
-docker-compose up -d
-```
-
-**Option 2: VPS (DigitalOcean, Hetzner, etc.)**
-```bash
-# Mit HTTPS (empfohlen)
-# Zusätzlich: Reverse Proxy (nginx/Caddy) + Let's Encrypt
-```
-
-### Android App
-
-```bash
-# Release Build
-./gradlew assembleRelease
-
-# APK signieren
-# Play Store Upload oder Direct Install
-```
-
-## 🔐 Security
-
-**Entwicklung:**
-- ✅ HTTP Basic Auth
-- ✅ Nur im lokalen Netzwerk
-
-**Produktion:**
-- ⚠️ HTTPS mit SSL/TLS (empfohlen)
-- ⚠️ Starkes Passwort
-- ⚠️ Firewall-Regeln
-- ⚠️ VPN für externen Zugriff
-
-## 🐛 Troubleshooting
-
-### Server startet nicht
-
-```bash
-# Port bereits belegt?
-sudo netstat -tlnp | grep 8080
-
-# Logs checken
-docker-compose logs webdav
-```
-
-### Android kann nicht verbinden
-
-- Ist Android im gleichen WLAN?
-- Ist die Server-IP korrekt?
-- Firewall blockiert Port 8080?
-- Credentials korrekt?
-
-```bash
-# Ping zum Server
-ping YOUR_SERVER_IP
-
-# Port erreichbar?
-telnet YOUR_SERVER_IP 8080
-```
-
-## 📝 TODO / Roadmap
-
-### Version 1.0 (MVP)
-- [x] Docker WebDAV Server
-- [ ] Android Basic CRUD
-- [ ] Auto-Sync bei WLAN
-- [ ] Error Handling
-- [ ] Notifications
-
-### Version 1.1
-- [ ] Suche
-- [ ] Dark Mode
-- [ ] Markdown-Support
-
-### Version 2.0
-- [ ] Desktop-Client (Flutter Desktop)
-- [ ] Tags/Kategorien
-- [ ] Verschlüsselung
-- [ ] Shared Notes
-
-## 📄 License
-
-MIT License - siehe [LICENSE](LICENSE)
-
-## 👤 Author
-
-Created for personal use - 2025
-
-## 🙏 Acknowledgments
-
-- [bytemark/webdav](https://hub.docker.com/r/bytemark/webdav) - Docker WebDAV Server
-- [Sardine Android](https://github.com/thegrizzlylabs/sardine-android) - WebDAV Client
-- [Android WorkManager](https://developer.android.com/topic/libraries/architecture/workmanager) - Background Tasks
-
----
-
-**Project Start:** 19. Dezember 2025
-**Status:** 🚧 In Development

android/.gitignore

@@ -13,3 +13,8 @@
 .externalNativeBuild
 .cxx
 local.properties
+
+# Signing configuration (contains sensitive keys)
+key.properties
+*.jks
+*.keystore

android/LOCAL_BUILDS.md

@@ -0,0 +1,157 @@
+# Lokale Gradle Builds mit Release-Signierung
+
+Dieses Dokument erklärt, wie du lokal signierte APKs erstellst, die mit den GitHub Release-APKs kompatibel sind.
+
+## Problem
+
+- **GitHub Actions** erstellt signierte Release-APKs mit dem Production-Keystore
+- **Lokale Debug-Builds** verwenden einen temporären Debug-Key
+- ❌ **Resultat:** Nutzer können lokale Debug-APKs NICHT über Release-APKs installieren (Signature Mismatch!)
+
+## Lösung: Lokale Release-Builds mit Production-Key
+
+### 1️⃣ Keystore-Konfiguration einrichten
+
+Du hast bereits den Keystore: `/android/app/simple-notes-release.jks`
+
+Erstelle eine `key.properties` Datei im `/android/` Ordner:
+
+```bash
+cd /home/liq/gitProjects/simple-notes-sync/android
+cp key.properties.example key.properties
+```
+
+Bearbeite `key.properties` mit den echten Werten:
+
+```properties
+storeFile=simple-notes-release.jks
+storePassword=<dein-keystore-password>
+keyAlias=<dein-key-alias>
+keyPassword=<dein-key-password>
+```
+
+**Wichtig:** Die Werte müssen **exakt** mit den GitHub Secrets übereinstimmen:
+- `KEYSTORE_PASSWORD` → `storePassword`
+- `KEY_ALIAS` → `keyAlias`
+- `KEY_PASSWORD` → `keyPassword`
+
+### 2️⃣ Lokal signierte Release-APKs bauen
+
+```bash
+cd android
+./gradlew assembleStandardRelease
+```
+
+Die signierten APKs findest du dann hier:
+```
+android/app/build/outputs/apk/standard/release/
+├── app-standard-universal-release.apk
+├── app-standard-arm64-v8a-release.apk
+└── app-standard-armeabi-v7a-release.apk
+```
+
+### 3️⃣ F-Droid Flavor bauen (optional)
+
+```bash
+./gradlew assembleFdroidRelease
+```
+
+### 4️⃣ Beide Flavors gleichzeitig bauen
+
+```bash
+./gradlew assembleStandardRelease assembleFdroidRelease
+```
+
+## Verifizierung der Signatur
+
+Um zu prüfen, ob dein lokaler Build die gleiche Signatur wie die Release-Builds hat:
+
+```bash
+# Signatur von lokalem Build anzeigen
+keytool -printcert -jarfile app/build/outputs/apk/standard/release/app-standard-universal-release.apk
+
+# Signatur von GitHub Release-APK anzeigen (zum Vergleich)
+keytool -printcert -jarfile ~/Downloads/simple-notes-sync-v1.1.0-standard-universal.apk
+```
+
+Die **SHA256** Fingerprints müssen **identisch** sein!
+
+## Troubleshooting
+
+### ❌ Build schlägt fehl: "Keystore not found"
+
+**Problem:** `key.properties` oder Keystore-Datei fehlt
+
+**Lösung:** 
+1. Prüfe, ob `key.properties` existiert: `ls -la key.properties`
+2. Prüfe, ob der Keystore existiert: `ls -la app/simple-notes-release.jks`
+
+### ❌ "Signature mismatch" beim Update
+
+**Problem:** Der lokale Build verwendet einen anderen Key als die Release-Builds
+
+**Lösung:**
+1. Vergleiche die Signaturen mit `keytool` (siehe oben)
+2. Stelle sicher, dass `key.properties` die **exakten** GitHub Secret-Werte enthält
+3. Deinstalliere die alte Version und installiere die neue (als letzter Ausweg)
+
+### ❌ Build verwendet Debug-Signatur
+
+**Problem:** `build.gradle.kts` findet `key.properties` nicht
+
+**Lösung:**
+```bash
+# Prüfe, ob die Datei im richtigen Verzeichnis liegt
+ls -la android/key.properties  # ✅ Richtig
+ls -la android/app/key.properties  # ❌ Falsch
+```
+
+## Sicherheitshinweise
+
+⚠️ **NIEMALS** diese Dateien committen:
+- `key.properties` (in `.gitignore`)
+- `*.jks` / `*.keystore` (in `.gitignore`)
+
+✅ **Schon in `.gitignore`:**
+```gitignore
+key.properties
+*.jks
+*.keystore
+```
+
+⚠️ Die GitHub Secrets (`KEYSTORE_PASSWORD`, etc.) und die lokale `key.properties` müssen **synchron** bleiben!
+
+## Workflow-Vergleich
+
+### GitHub Actions Build
+```yaml
+- Lädt Keystore aus Base64 Secret
+- Erstellt key.properties aus Secrets
+- Baut mit: ./gradlew assembleStandardRelease
+- ✅ Produktions-signiert
+```
+
+### Lokaler Build
+```bash
+# Mit key.properties konfiguriert:
+./gradlew assembleStandardRelease
+# ✅ Produktions-signiert (gleiche Signatur wie GitHub!)
+
+# Ohne key.properties:
+./gradlew assembleStandardRelease
+# ⚠️ Debug-signiert (inkompatibel mit Releases!)
+```
+
+## Quick Reference
+
+```bash
+# Release-APK bauen (signiert, klein, optimiert)
+./gradlew assembleStandardRelease
+
+# Debug-APK bauen (unsigniert, groß, debuggable)
+./gradlew assembleStandardDebug
+
+# APK per HTTP Server verteilen
+cd app/build/outputs/apk/standard/release
+python3 -m http.server 8892
+```

android/app/build.gradle.kts

@@ -17,8 +17,8 @@ android {
         applicationId = "dev.dettmer.simplenotes"
         minSdk = 24
         targetSdk = 36
-        versionCode = 2  // 🔥 F-Droid Release v1.1.0
-        versionName = "1.1.0"  // 🔥 Configurable Sync Interval + About Section
+        versionCode = 4  // 🔥 v1.1.2: UX Fixes + CancellationException Handling
+        versionName = "1.1.2"  // 🔥 v1.1.2: Better UX + Job Cancellation Fix
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         
@@ -26,6 +26,12 @@ android {
         buildConfigField("String", "BUILD_DATE", "\"${getBuildDate()}\"")
     }
     
+    // Disable Google dependency metadata for F-Droid/IzzyOnDroid compatibility
+    dependenciesInfo {
+        includeInApk = false  // Removes DEPENDENCY_INFO_BLOCK from APK
+        includeInBundle = false  // Also disable for AAB (Google Play)
+    }
+    
     // Enable multiple APKs per ABI for smaller downloads
     splits {
         abi {
@@ -124,6 +130,9 @@ dependencies {
     // LocalBroadcastManager für UI Refresh
     implementation("androidx.localbroadcastmanager:localbroadcastmanager:1.1.0")
 
+    // SwipeRefreshLayout für Pull-to-Refresh
+    implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.1.0")
+
     // Testing (bleiben so)
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)

android/app/src/main/AndroidManifest.xml

@@ -27,7 +27,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.SimpleNotes"
-        android:usesCleartextTraffic="true"
+        android:networkSecurityConfig="@xml/network_security_config"
         tools:targetApi="31">
         <activity
             android:name=".MainActivity"

android/app/src/main/java/dev/dettmer/simplenotes/MainActivity.kt

@@ -34,6 +34,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import dev.dettmer.simplenotes.sync.WebDavSyncService
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 
 class MainActivity : AppCompatActivity() {
     
@@ -41,10 +42,14 @@ class MainActivity : AppCompatActivity() {
     private lateinit var emptyStateCard: MaterialCardView
     private lateinit var fabAddNote: FloatingActionButton
     private lateinit var toolbar: MaterialToolbar
+    private lateinit var swipeRefreshLayout: SwipeRefreshLayout
     
     private lateinit var adapter: NotesAdapter
     private val storage by lazy { NotesStorage(this) }
     
+    // Track pending deletions to prevent flicker when notes reload
+    private val pendingDeletions = mutableSetOf<String>()
+    
     private val prefs by lazy {
         getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
     }
@@ -91,6 +96,9 @@ class MainActivity : AppCompatActivity() {
             Logger.enableFileLogging(this)
         }
         
+        // Alte Sync-Notifications beim App-Start löschen
+        NotificationHelper.clearSyncNotifications(this)
+        
         // Permission für Notifications (Android 13+)
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
             requestNotificationPermission()
@@ -117,7 +125,7 @@ class MainActivity : AppCompatActivity() {
         
         Logger.d(TAG, "📡 BroadcastReceiver registered (sync-completed)")
         
-        // Reload notes
+        // Reload notes (scroll to top wird in loadNotes() gemacht)
         loadNotes()
         
         // Trigger Auto-Sync beim App-Wechsel in Vordergrund (Toast)
@@ -142,10 +150,27 @@ class MainActivity : AppCompatActivity() {
         // Update last sync timestamp
         prefs.edit().putLong(PREF_LAST_AUTO_SYNC_TIME, System.currentTimeMillis()).apply()
         
-        // GLEICHER Sync-Code wie manueller Sync (funktioniert!)
         lifecycleScope.launch {
             try {
                 val syncService = WebDavSyncService(this@MainActivity)
+                
+                // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
+                if (!syncService.hasUnsyncedChanges()) {
+                    Logger.d(TAG, "⏭️ Auto-sync ($source): No unsynced changes - skipping")
+                    return@launch
+                }
+                
+                // ⭐ WICHTIG: Server-Erreichbarkeits-Check VOR Sync (wie in SyncWorker)
+                val isReachable = withContext(Dispatchers.IO) {
+                    syncService.isServerReachable()
+                }
+                
+                if (!isReachable) {
+                    Logger.d(TAG, "⏭️ Auto-sync ($source): Server not reachable - skipping silently")
+                    return@launch
+                }
+                
+                // Server ist erreichbar → Sync durchführen
                 val result = withContext(Dispatchers.IO) {
                     syncService.syncNotes()
                 }
@@ -203,6 +228,7 @@ class MainActivity : AppCompatActivity() {
         emptyStateCard = findViewById(R.id.emptyStateCard)
         fabAddNote = findViewById(R.id.fabAddNote)
         toolbar = findViewById(R.id.toolbar)
+        swipeRefreshLayout = findViewById<SwipeRefreshLayout>(R.id.swipeRefreshLayout)
     }
     
     private fun setupToolbar() {
@@ -216,10 +242,72 @@ class MainActivity : AppCompatActivity() {
         recyclerViewNotes.adapter = adapter
         recyclerViewNotes.layoutManager = LinearLayoutManager(this)
         
+        // 🔥 v1.1.2: Setup Pull-to-Refresh
+        setupPullToRefresh()
+        
         // Setup Swipe-to-Delete
         setupSwipeToDelete()
     }
     
+    /**
+     * Setup Pull-to-Refresh für manuellen Sync (v1.1.2)
+     */
+    private fun setupPullToRefresh() {
+        swipeRefreshLayout.setOnRefreshListener {
+            Logger.d(TAG, "🔄 Pull-to-Refresh triggered - starting manual sync")
+            
+            lifecycleScope.launch {
+                try {
+                    val prefs = getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
+                    val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
+                    
+                    if (serverUrl.isNullOrEmpty()) {
+                        showToast("⚠️ Server noch nicht konfiguriert")
+                        swipeRefreshLayout.isRefreshing = false
+                        return@launch
+                    }
+                    
+                    val syncService = WebDavSyncService(this@MainActivity)
+                    
+                    // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
+                    if (!syncService.hasUnsyncedChanges()) {
+                        Logger.d(TAG, "⏭️ No unsynced changes, skipping server reachability check")
+                        showToast("✅ Bereits synchronisiert")
+                        swipeRefreshLayout.isRefreshing = false
+                        return@launch
+                    }
+                    
+                    // Check if server is reachable
+                    if (!syncService.isServerReachable()) {
+                        showToast("⚠️ Server nicht erreichbar")
+                        swipeRefreshLayout.isRefreshing = false
+                        return@launch
+                    }
+                    
+                    // Perform sync
+                    val result = syncService.syncNotes()
+                    
+                    if (result.isSuccess) {
+                        showToast("✅ ${result.syncedCount} Notizen synchronisiert")
+                        loadNotes()
+                    } else {
+                        showToast("❌ Sync fehlgeschlagen: ${result.errorMessage}")
+                    }
+                } catch (e: Exception) {
+                    Logger.e(TAG, "Pull-to-Refresh sync failed", e)
+                    showToast("❌ Fehler: ${e.message}")
+                } finally {
+                    swipeRefreshLayout.isRefreshing = false
+                }
+            }
+        }
+        
+        // Set Material 3 color scheme
+        swipeRefreshLayout.setColorSchemeResources(
+            com.google.android.material.R.color.material_dynamic_primary50
+        )
+    }
+    
     private fun setupSwipeToDelete() {
         val itemTouchHelper = ItemTouchHelper(object : ItemTouchHelper.SimpleCallback(
             0, // No drag
@@ -236,6 +324,9 @@ class MainActivity : AppCompatActivity() {
                 val note = adapter.currentList[position]
                 val notesCopy = adapter.currentList.toMutableList()
                 
+                // Track pending deletion to prevent flicker
+                pendingDeletions.add(note.id)
+                
                 // Remove from list immediately for visual feedback
                 notesCopy.removeAt(position)
                 adapter.submitList(notesCopy)
@@ -246,13 +337,15 @@ class MainActivity : AppCompatActivity() {
                     "Notiz gelöscht",
                     Snackbar.LENGTH_LONG
                 ).setAction("RÜCKGÄNGIG") {
-                    // UNDO: Restore note in list
+                    // UNDO: Remove from pending deletions and restore
+                    pendingDeletions.remove(note.id)
                     loadNotes()
                 }.addCallback(object : Snackbar.Callback() {
                     override fun onDismissed(transientBottomBar: Snackbar?, event: Int) {
                         if (event != DISMISS_EVENT_ACTION) {
                             // Snackbar dismissed without UNDO → Actually delete the note
                             storage.deleteNote(note.id)
+                            pendingDeletions.remove(note.id)
                             loadNotes()
                         }
                     }
@@ -276,10 +369,21 @@ class MainActivity : AppCompatActivity() {
     
     private fun loadNotes() {
         val notes = storage.loadAllNotes()
-        adapter.submitList(notes)
+        
+        // Filter out notes that are pending deletion (prevent flicker)
+        val filteredNotes = notes.filter { it.id !in pendingDeletions }
+        
+        // Submit list with callback to scroll to top after list is updated
+        adapter.submitList(filteredNotes) {
+            // Scroll to top after list update is complete
+            // Wichtig: Nach dem Erstellen/Bearbeiten einer Notiz
+            if (filteredNotes.isNotEmpty()) {
+                recyclerViewNotes.scrollToPosition(0)
+            }
+        }
         
         // Material 3 Empty State Card
-        emptyStateCard.visibility = if (notes.isEmpty()) {
+        emptyStateCard.visibility = if (filteredNotes.isEmpty()) {
             android.view.View.VISIBLE
         } else {
             android.view.View.GONE
@@ -303,10 +407,30 @@ class MainActivity : AppCompatActivity() {
     private fun triggerManualSync() {
         lifecycleScope.launch {
             try {
+                // Create sync service
+                val syncService = WebDavSyncService(this@MainActivity)
+                
+                // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
+                if (!syncService.hasUnsyncedChanges()) {
+                    Logger.d(TAG, "⏭️ Manual Sync: No unsynced changes - skipping")
+                    showToast("✅ Bereits synchronisiert")
+                    return@launch
+                }
+                
                 showToast("Starte Synchronisation...")
                 
-                // Start sync
-                val syncService = WebDavSyncService(this@MainActivity)
+                // ⭐ WICHTIG: Server-Erreichbarkeits-Check VOR Sync (wie in SyncWorker)
+                val isReachable = withContext(Dispatchers.IO) {
+                    syncService.isServerReachable()
+                }
+                
+                if (!isReachable) {
+                    Logger.d(TAG, "⏭️ Manual Sync: Server not reachable - aborting")
+                    showToast("Server nicht erreichbar")
+                    return@launch
+                }
+                
+                // Server ist erreichbar → Sync durchführen
                 val result = withContext(Dispatchers.IO) {
                     syncService.syncNotes()
                 }

android/app/src/main/java/dev/dettmer/simplenotes/NoteEditorActivity.kt

@@ -41,7 +41,8 @@ class NoteEditorActivity : AppCompatActivity() {
         setSupportActionBar(toolbar)
         supportActionBar?.apply {
             setDisplayHomeAsUpEnabled(true)
-            setHomeAsUpIndicator(android.R.drawable.ic_menu_close_clear_cancel)
+            // 🔥 v1.1.2: Use default back arrow (Material Design) instead of X icon
+            // Icon is set in XML: app:navigationIcon="?attr/homeAsUpIndicator"
         }
         
         // Find views

android/app/src/main/java/dev/dettmer/simplenotes/SettingsActivity.kt

@@ -10,6 +10,7 @@ import android.util.Log
 import android.view.MenuItem
 import android.widget.Button
 import android.widget.EditText
+import android.widget.RadioButton
 import android.widget.RadioGroup
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
@@ -20,14 +21,12 @@ import androidx.lifecycle.lifecycleScope
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import com.google.android.material.appbar.MaterialToolbar
 import com.google.android.material.card.MaterialCardView
-import com.google.android.material.chip.Chip
 import com.google.android.material.color.DynamicColors
 import com.google.android.material.switchmaterial.SwitchMaterial
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import dev.dettmer.simplenotes.utils.UrlValidator
 import kotlinx.coroutines.withContext
 import dev.dettmer.simplenotes.sync.WebDavSyncService
 import dev.dettmer.simplenotes.sync.NetworkMonitor
@@ -49,6 +48,7 @@ class SettingsActivity : AppCompatActivity() {
         private const val LICENSE_URL = "https://github.com/inventory69/simple-notes-sync/blob/main/LICENSE"
     }
     
+    private lateinit var textInputLayoutServerUrl: com.google.android.material.textfield.TextInputLayout
     private lateinit var editTextServerUrl: EditText
     private lateinit var editTextUsername: EditText
     private lateinit var editTextPassword: EditText
@@ -57,7 +57,12 @@ class SettingsActivity : AppCompatActivity() {
     private lateinit var buttonSyncNow: Button
     private lateinit var buttonRestoreFromServer: Button
     private lateinit var textViewServerStatus: TextView
-    private lateinit var chipAutoSaveStatus: Chip
+    
+    // Protocol Selection UI
+    private lateinit var protocolRadioGroup: RadioGroup
+    private lateinit var radioHttp: RadioButton
+    private lateinit var radioHttps: RadioButton
+    private lateinit var protocolHintText: TextView
     
     // Sync Interval UI
     private lateinit var radioGroupSyncInterval: RadioGroup
@@ -68,8 +73,6 @@ class SettingsActivity : AppCompatActivity() {
     private lateinit var cardDeveloperProfile: MaterialCardView
     private lateinit var cardLicense: MaterialCardView
     
-    private var autoSaveIndicatorJob: Job? = null
-    
     private val prefs by lazy {
         getSharedPreferences(Constants.PREFS_NAME, MODE_PRIVATE)
     }
@@ -98,6 +101,7 @@ class SettingsActivity : AppCompatActivity() {
     }
     
     private fun findViews() {
+        textInputLayoutServerUrl = findViewById(R.id.textInputLayoutServerUrl)
         editTextServerUrl = findViewById(R.id.editTextServerUrl)
         editTextUsername = findViewById(R.id.editTextUsername)
         editTextPassword = findViewById(R.id.editTextPassword)
@@ -106,7 +110,12 @@ class SettingsActivity : AppCompatActivity() {
         buttonSyncNow = findViewById(R.id.buttonSyncNow)
         buttonRestoreFromServer = findViewById(R.id.buttonRestoreFromServer)
         textViewServerStatus = findViewById(R.id.textViewServerStatus)
-        chipAutoSaveStatus = findViewById(R.id.chipAutoSaveStatus)
+        
+        // Protocol Selection UI
+        protocolRadioGroup = findViewById(R.id.protocolRadioGroup)
+        radioHttp = findViewById(R.id.radioHttp)
+        radioHttps = findViewById(R.id.radioHttps)
+        protocolHintText = findViewById(R.id.protocolHintText)
         
         // Sync Interval UI
         radioGroupSyncInterval = findViewById(R.id.radioGroupSyncInterval)
@@ -119,16 +128,91 @@ class SettingsActivity : AppCompatActivity() {
     }
     
     private fun loadSettings() {
-        editTextServerUrl.setText(prefs.getString(Constants.KEY_SERVER_URL, ""))
+        val savedUrl = prefs.getString(Constants.KEY_SERVER_URL, "") ?: ""
+        
+        // Parse existing URL to extract protocol and host/path
+        if (savedUrl.isNotEmpty()) {
+            val (protocol, hostPath) = parseUrl(savedUrl)
+            
+            // Set protocol radio button
+            when (protocol) {
+                "http" -> radioHttp.isChecked = true
+                "https" -> radioHttps.isChecked = true
+                else -> radioHttp.isChecked = true // Default to HTTP (most users have local servers)
+            }
+            
+            // Set URL with protocol prefix in the text field
+            editTextServerUrl.setText("$protocol://$hostPath")
+        } else {
+            // Default: HTTP selected (lokale Server sind häufiger), empty URL with prefix
+            radioHttp.isChecked = true
+            editTextServerUrl.setText("http://")
+        }
+        
         editTextUsername.setText(prefs.getString(Constants.KEY_USERNAME, ""))
         editTextPassword.setText(prefs.getString(Constants.KEY_PASSWORD, ""))
         switchAutoSync.isChecked = prefs.getBoolean(Constants.KEY_AUTO_SYNC, false)
         
+        // Update hint text based on selected protocol
+        updateProtocolHint()
+        
         // Server Status prüfen
         checkServerStatus()
     }
     
+    /**
+     * Parse URL into protocol and host/path components
+     * @param url Full URL like "https://example.com:8080/webdav"
+     * @return Pair of (protocol, hostPath) like ("https", "example.com:8080/webdav")
+     */
+    private fun parseUrl(url: String): Pair<String, String> {
+        return when {
+            url.startsWith("https://") -> "https" to url.removePrefix("https://")
+            url.startsWith("http://") -> "http" to url.removePrefix("http://")
+            else -> "http" to url // Default to HTTP if no protocol specified
+        }
+    }
+    
+    /**
+     * Update the hint text below protocol selection based on selected protocol
+     */
+    private fun updateProtocolHint() {
+        protocolHintText.text = if (radioHttp.isChecked) {
+            "HTTP nur für lokale Netzwerke (z.B. 192.168.x.x, 10.x.x.x)"
+        } else {
+            "HTTPS für sichere Verbindungen über das Internet"
+        }
+    }
+    
+    /**
+     * Update protocol prefix in URL field when radio button changes
+     * Keeps the host/path part, only changes http:// <-> https://
+     */
+    private fun updateProtocolInUrl() {
+        val currentText = editTextServerUrl.text.toString()
+        val newProtocol = if (radioHttp.isChecked) "http" else "https"
+        
+        // Extract host/path without protocol
+        val hostPath = when {
+            currentText.startsWith("https://") -> currentText.removePrefix("https://")
+            currentText.startsWith("http://") -> currentText.removePrefix("http://")
+            else -> currentText
+        }
+        
+        // Set new URL with correct protocol
+        editTextServerUrl.setText("$newProtocol://$hostPath")
+        
+        // Move cursor to end
+        editTextServerUrl.setSelection(editTextServerUrl.text?.length ?: 0)
+    }
+    
     private fun setupListeners() {
+        // Protocol selection listener - update URL prefix when radio changes
+        protocolRadioGroup.setOnCheckedChangeListener { _, checkedId ->
+            updateProtocolInUrl()
+            updateProtocolHint()
+        }
+        
         buttonTestConnection.setOnClickListener {
             saveSettings()
             testConnection()
@@ -146,24 +230,23 @@ class SettingsActivity : AppCompatActivity() {
         
         switchAutoSync.setOnCheckedChangeListener { _, isChecked ->
             onAutoSyncToggled(isChecked)
-            showAutoSaveIndicator()
         }
         
+        // Clear error when user starts typing again
+        editTextServerUrl.addTextChangedListener(object : android.text.TextWatcher {
+            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
+            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+                textInputLayoutServerUrl.error = null
+            }
+            override fun afterTextChanged(s: android.text.Editable?) {}
+        })
+        
         // Server Status Check bei Settings-Änderung
         editTextServerUrl.setOnFocusChangeListener { _, hasFocus ->
             if (!hasFocus) {
                 checkServerStatus()
-                showAutoSaveIndicator()
             }
         }
-        
-        editTextUsername.setOnFocusChangeListener { _, hasFocus ->
-            if (!hasFocus) showAutoSaveIndicator()
-        }
-        
-        editTextPassword.setOnFocusChangeListener { _, hasFocus ->
-            if (!hasFocus) showAutoSaveIndicator()
-        }
     }
     
     /**
@@ -258,8 +341,26 @@ class SettingsActivity : AppCompatActivity() {
     }
     
     private fun saveSettings() {
+        // URL is already complete with protocol in the text field (http:// or https://)
+        val fullUrl = editTextServerUrl.text.toString().trim()
+        
+        // Clear previous error
+        textInputLayoutServerUrl.error = null
+        textInputLayoutServerUrl.isErrorEnabled = false
+        
+        // 🔥 v1.1.2: Validate HTTP URL (only allow for local networks)
+        if (fullUrl.isNotEmpty()) {
+            val (isValid, errorMessage) = UrlValidator.validateHttpUrl(fullUrl)
+            if (!isValid) {
+                // Only show error in TextField (no Toast)
+                textInputLayoutServerUrl.isErrorEnabled = true
+                textInputLayoutServerUrl.error = errorMessage
+                return
+            }
+        }
+        
         prefs.edit().apply {
-            putString(Constants.KEY_SERVER_URL, editTextServerUrl.text.toString().trim())
+            putString(Constants.KEY_SERVER_URL, fullUrl)
             putString(Constants.KEY_USERNAME, editTextUsername.text.toString().trim())
             putString(Constants.KEY_PASSWORD, editTextPassword.text.toString().trim())
             putBoolean(Constants.KEY_AUTO_SYNC, switchAutoSync.isChecked)
@@ -268,6 +369,24 @@ class SettingsActivity : AppCompatActivity() {
     }
     
     private fun testConnection() {
+        // URL is already complete with protocol in the text field (http:// or https://)
+        val fullUrl = editTextServerUrl.text.toString().trim()
+        
+        // Clear previous error
+        textInputLayoutServerUrl.error = null
+        textInputLayoutServerUrl.isErrorEnabled = false
+        
+        // 🔥 v1.1.2: Validate before testing
+        if (fullUrl.isNotEmpty()) {
+            val (isValid, errorMessage) = UrlValidator.validateHttpUrl(fullUrl)
+            if (!isValid) {
+                // Only show error in TextField (no Toast)
+                textInputLayoutServerUrl.isErrorEnabled = true
+                textInputLayoutServerUrl.error = errorMessage
+                return
+            }
+        }
+        
         lifecycleScope.launch {
             try {
                 showToast("Teste Verbindung...")
@@ -291,8 +410,23 @@ class SettingsActivity : AppCompatActivity() {
     private fun syncNow() {
         lifecycleScope.launch {
             try {
-                showToast("Synchronisiere...")
                 val syncService = WebDavSyncService(this@SettingsActivity)
+                
+                // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
+                if (!syncService.hasUnsyncedChanges()) {
+                    showToast("✅ Bereits synchronisiert")
+                    return@launch
+                }
+                
+                showToast("Synchronisiere...")
+                
+                // ⭐ WICHTIG: Server-Erreichbarkeits-Check VOR Sync (wie in anderen Triggern)
+                if (!syncService.isServerReachable()) {
+                    showToast("⚠️ Server nicht erreichbar")
+                    checkServerStatus() // Server-Status aktualisieren
+                    return@launch
+                }
+                
                 val result = syncService.syncNotes()
                 
                 if (result.isSuccess) {
@@ -420,32 +554,6 @@ class SettingsActivity : AppCompatActivity() {
         }
     }
     
-    private fun showAutoSaveIndicator() {
-        // Cancel previous job if still running
-        autoSaveIndicatorJob?.cancel()
-        
-        // Show saving indicator
-        chipAutoSaveStatus.apply {
-            visibility = android.view.View.VISIBLE
-            text = "💾 Speichere..."
-            setChipBackgroundColorResource(android.R.color.darker_gray)
-        }
-        
-        // Save settings
-        saveSettings()
-        
-        // Show saved confirmation after short delay
-        autoSaveIndicatorJob = lifecycleScope.launch {
-            delay(300) // Short delay to show "Speichere..."
-            chipAutoSaveStatus.apply {
-                text = "✓ Gespeichert"
-                setChipBackgroundColorResource(android.R.color.holo_green_light)
-            }
-            delay(2000) // Show for 2 seconds
-            chipAutoSaveStatus.visibility = android.view.View.GONE
-        }
-    }
-    
     private fun showRestoreConfirmation() {
         android.app.AlertDialog.Builder(this)
             .setTitle(R.string.restore_confirmation_title)

android/app/src/main/java/dev/dettmer/simplenotes/adapters/NotesAdapter.kt

@@ -1,5 +1,6 @@
 package dev.dettmer.simplenotes.adapters
 
+import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -11,6 +12,7 @@ import androidx.recyclerview.widget.RecyclerView
 import dev.dettmer.simplenotes.R
 import dev.dettmer.simplenotes.models.Note
 import dev.dettmer.simplenotes.models.SyncStatus
+import dev.dettmer.simplenotes.utils.Constants
 import dev.dettmer.simplenotes.utils.toReadableTime
 import dev.dettmer.simplenotes.utils.truncate
 
@@ -39,14 +41,25 @@ class NotesAdapter(
             textViewContent.text = note.content.truncate(100)
             textViewTimestamp.text = note.updatedAt.toReadableTime()
             
-            // Sync status icon
-            val syncIcon = when (note.syncStatus) {
-                SyncStatus.SYNCED -> android.R.drawable.ic_menu_upload
-                SyncStatus.PENDING -> android.R.drawable.ic_popup_sync
-                SyncStatus.CONFLICT -> android.R.drawable.ic_dialog_alert
-                SyncStatus.LOCAL_ONLY -> android.R.drawable.ic_menu_save
+            // Sync Icon nur zeigen wenn Sync konfiguriert ist
+            val prefs = itemView.context.getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
+            val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
+            val isSyncConfigured = !serverUrl.isNullOrEmpty()
+            
+            if (isSyncConfigured) {
+                // Sync status icon
+                val syncIcon = when (note.syncStatus) {
+                    SyncStatus.SYNCED -> android.R.drawable.ic_menu_upload
+                    SyncStatus.PENDING -> android.R.drawable.ic_popup_sync
+                    SyncStatus.CONFLICT -> android.R.drawable.ic_dialog_alert
+                    SyncStatus.LOCAL_ONLY -> android.R.drawable.ic_menu_save
+                }
+                imageViewSyncStatus.setImageResource(syncIcon)
+                imageViewSyncStatus.visibility = View.VISIBLE
+            } else {
+                // Sync nicht konfiguriert → Icon verstecken
+                imageViewSyncStatus.visibility = View.GONE
             }
-            imageViewSyncStatus.setImageResource(syncIcon)
             
             itemView.setOnClickListener {
                 onNoteClick(note)

android/app/src/main/java/dev/dettmer/simplenotes/sync/SyncWorker.kt

@@ -8,6 +8,7 @@ import androidx.work.WorkerParameters
 import dev.dettmer.simplenotes.BuildConfig
 import dev.dettmer.simplenotes.utils.Logger
 import dev.dettmer.simplenotes.utils.NotificationHelper
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 
@@ -52,7 +53,49 @@ class SyncWorker(
             }
             
             if (BuildConfig.DEBUG) {
-                Logger.d(TAG, "📍 Step 2: Before syncNotes() call")
+                Logger.d(TAG, "📍 Step 2: Checking for unsynced changes (Performance Pre-Check)")
+            }
+            
+            // 🔥 v1.1.2: Performance-Optimierung - Skip Sync wenn keine lokalen Änderungen
+            // Spart Batterie + Netzwerk-Traffic + Server-Last
+            if (!syncService.hasUnsyncedChanges()) {
+                Logger.d(TAG, "⏭️ No local changes - skipping sync (performance optimization)")
+                Logger.d(TAG, "   Saves battery, network traffic, and server load")
+                
+                if (BuildConfig.DEBUG) {
+                    Logger.d(TAG, "✅ SyncWorker.doWork() SUCCESS (no changes to sync)")
+                    Logger.d(TAG, "═══════════════════════════════════════")
+                }
+                
+                return@withContext Result.success()
+            }
+            
+            if (BuildConfig.DEBUG) {
+                Logger.d(TAG, "📍 Step 3: Checking server reachability (Pre-Check)")
+            }
+            
+            // ⭐ KRITISCH: Server-Erreichbarkeits-Check VOR Sync
+            // Verhindert Fehler-Notifications in fremden WiFi-Netzen
+            // Wartet bis Netzwerk bereit ist (DHCP, Routing, Gateway)
+            if (!syncService.isServerReachable()) {
+                Logger.d(TAG, "⏭️ Server not reachable - skipping sync (no error)")
+                Logger.d(TAG, "   Reason: Server offline/wrong network/network not ready/not configured")
+                Logger.d(TAG, "   This is normal in foreign WiFi or during network initialization")
+                
+                // 🔥 v1.1.2: Check if we should show warning (server unreachable for >24h)
+                checkAndShowSyncWarning(syncService)
+                
+                if (BuildConfig.DEBUG) {
+                    Logger.d(TAG, "✅ SyncWorker.doWork() SUCCESS (silent skip)")
+                    Logger.d(TAG, "═══════════════════════════════════════")
+                }
+                
+                // Success zurückgeben (kein Fehler, Server ist halt nicht erreichbar)
+                return@withContext Result.success()
+            }
+            
+            if (BuildConfig.DEBUG) {
+                Logger.d(TAG, "📍 Step 3: Server reachable - proceeding with sync")
                 Logger.d(TAG, "    SyncService: $syncService")
             }
             
@@ -73,13 +116,13 @@ class SyncWorker(
             }
             
             if (BuildConfig.DEBUG) {
-                Logger.d(TAG, "📍 Step 3: Processing result")
+                Logger.d(TAG, "📍 Step 4: Processing result")
                 Logger.d(TAG, "📦 Sync result: success=${result.isSuccess}, count=${result.syncedCount}, error=${result.errorMessage}")
             }
             
             if (result.isSuccess) {
                 if (BuildConfig.DEBUG) {
-                    Logger.d(TAG, "📍 Step 4: Success path")
+                    Logger.d(TAG, "📍 Step 5: Success path")
                 }
                 Logger.i(TAG, "✅ Sync successful: ${result.syncedCount} notes")
                 
@@ -109,7 +152,7 @@ class SyncWorker(
                 Result.success()
             } else {
                 if (BuildConfig.DEBUG) {
-                    Logger.d(TAG, "📍 Step 4: Failure path")
+                    Logger.d(TAG, "📍 Step 5: Failure path")
                 }
                 Logger.e(TAG, "❌ Sync failed: ${result.errorMessage}")
                 NotificationHelper.showSyncError(
@@ -126,6 +169,32 @@ class SyncWorker(
                 }
                 Result.failure()
             }
+        } catch (e: CancellationException) {
+            // ⭐ Job wurde gecancelt - KEIN FEHLER!
+            // Gründe: App-Update, Doze Mode, Battery Optimization, Network Constraint, etc.
+            if (BuildConfig.DEBUG) {
+                Logger.d(TAG, "═══════════════════════════════════════")
+            }
+            Logger.d(TAG, "⏹️ Job was cancelled (normal - update/doze/constraints)")
+            Logger.d(TAG, "   Reason could be: App update, Doze mode, Battery opt, Network disconnect")
+            Logger.d(TAG, "   This is expected Android behavior - not an error!")
+            
+            try {
+                // UI-Refresh trotzdem triggern (falls MainActivity geöffnet)
+                broadcastSyncCompleted(false, 0)
+            } catch (broadcastError: Exception) {
+                Logger.e(TAG, "Failed to broadcast after cancellation", broadcastError)
+            }
+            
+            if (BuildConfig.DEBUG) {
+                Logger.d(TAG, "✅ SyncWorker.doWork() SUCCESS (cancelled, no error)")
+                Logger.d(TAG, "═══════════════════════════════════════")
+            }
+            
+            // ⚠️ WICHTIG: Result.success() zurückgeben!
+            // Cancellation ist KEIN Fehler, WorkManager soll nicht retries machen
+            Result.success()
+            
         } catch (e: Exception) {
             if (BuildConfig.DEBUG) {
                 Logger.d(TAG, "═══════════════════════════════════════")
@@ -168,4 +237,69 @@ class SyncWorker(
         LocalBroadcastManager.getInstance(applicationContext).sendBroadcast(intent)
         Logger.d(TAG, "📡 Broadcast sent: success=$success, count=$count")
     }
+    
+    /**
+     * Prüft ob Server längere Zeit unreachable und zeigt ggf. Warnung (v1.1.2)
+     * - Nur wenn Auto-Sync aktiviert
+     * - Nur wenn schon mal erfolgreich gesynct
+     * - Nur wenn >24h seit letztem erfolgreichen Sync
+     * - Throttling: Max. 1 Warnung pro 24h
+     */
+    private fun checkAndShowSyncWarning(syncService: WebDavSyncService) {
+        try {
+            val prefs = applicationContext.getSharedPreferences(
+                dev.dettmer.simplenotes.utils.Constants.PREFS_NAME,
+                android.content.Context.MODE_PRIVATE
+            )
+            
+            // Check 1: Auto-Sync aktiviert?
+            val autoSyncEnabled = prefs.getBoolean(
+                dev.dettmer.simplenotes.utils.Constants.KEY_AUTO_SYNC,
+                false
+            )
+            if (!autoSyncEnabled) {
+                Logger.d(TAG, "⏭️ Auto-Sync disabled - no warning needed")
+                return
+            }
+            
+            // Check 2: Schon mal erfolgreich gesynct?
+            val lastSuccessfulSync = syncService.getLastSuccessfulSyncTimestamp()
+            if (lastSuccessfulSync == 0L) {
+                Logger.d(TAG, "⏭️ Never synced successfully - no warning needed")
+                return
+            }
+            
+            // Check 3: >24h seit letztem erfolgreichen Sync?
+            val now = System.currentTimeMillis()
+            val timeSinceLastSync = now - lastSuccessfulSync
+            if (timeSinceLastSync < dev.dettmer.simplenotes.utils.Constants.SYNC_WARNING_THRESHOLD_MS) {
+                Logger.d(TAG, "⏭️ Last successful sync <24h ago - no warning needed")
+                return
+            }
+            
+            // Check 4: Throttling - schon Warnung in letzten 24h gezeigt?
+            val lastWarningShown = prefs.getLong(
+                dev.dettmer.simplenotes.utils.Constants.KEY_LAST_SYNC_WARNING_SHOWN,
+                0L
+            )
+            if (now - lastWarningShown < dev.dettmer.simplenotes.utils.Constants.SYNC_WARNING_THRESHOLD_MS) {
+                Logger.d(TAG, "⏭️ Warning already shown in last 24h - throttling")
+                return
+            }
+            
+            // Zeige Warnung
+            val hoursSinceLastSync = timeSinceLastSync / (1000 * 60 * 60)
+            NotificationHelper.showSyncWarning(applicationContext, hoursSinceLastSync)
+            
+            // Speichere Zeitpunkt der Warnung
+            prefs.edit()
+                .putLong(dev.dettmer.simplenotes.utils.Constants.KEY_LAST_SYNC_WARNING_SHOWN, now)
+                .apply()
+            
+            Logger.d(TAG, "⚠️ Sync warning shown: Server unreachable for ${hoursSinceLastSync}h")
+            
+        } catch (e: Exception) {
+            Logger.e(TAG, "Failed to check/show sync warning", e)
+        }
+    }
 }

android/app/src/main/java/dev/dettmer/simplenotes/sync/WebDavSyncService.kt

@@ -20,6 +20,7 @@ import java.net.InetSocketAddress
 import java.net.NetworkInterface
 import java.net.Proxy
 import java.net.Socket
+import java.net.URL
 import javax.net.SocketFactory
 
 class WebDavSyncService(private val context: Context) {
@@ -188,6 +189,78 @@ class WebDavSyncService(private val context: Context) {
         return prefs.getString(Constants.KEY_SERVER_URL, null)
     }
     
+    /**
+     * Prüft ob lokale Änderungen seit letztem Sync vorhanden sind (v1.1.2)
+     * Performance-Optimierung: Vermeidet unnötige Sync-Operationen
+     * 
+     * @return true wenn unsynced changes vorhanden, false sonst
+     */
+    suspend fun hasUnsyncedChanges(): Boolean = withContext(Dispatchers.IO) {
+        return@withContext try {
+            val lastSyncTime = getLastSyncTimestamp()
+            
+            // Wenn noch nie gesynct, dann haben wir Änderungen
+            if (lastSyncTime == 0L) {
+                Logger.d(TAG, "📝 Never synced - assuming changes exist")
+                return@withContext true
+            }
+            
+            // Prüfe ob Notizen existieren die neuer sind als letzter Sync
+            val storage = dev.dettmer.simplenotes.storage.NotesStorage(context)
+            val allNotes = storage.loadAllNotes()
+            
+            val hasChanges = allNotes.any { note ->
+                note.updatedAt > lastSyncTime
+            }
+            
+            Logger.d(TAG, "📊 Unsynced changes check: $hasChanges (${allNotes.size} notes total)")
+            if (hasChanges) {
+                val unsyncedCount = allNotes.count { note -> note.updatedAt > lastSyncTime }
+                Logger.d(TAG, "   → $unsyncedCount notes modified since last sync")
+            }
+            
+            hasChanges
+        } catch (e: Exception) {
+            Logger.e(TAG, "Failed to check for unsynced changes - assuming changes exist", e)
+            // Bei Fehler lieber sync durchführen (safe default)
+            true
+        }
+    }
+    
+    /**
+     * Prüft ob WebDAV-Server erreichbar ist (ohne Sync zu starten)
+     * Verwendet Socket-Check für schnelle Erreichbarkeitsprüfung
+     * 
+     * @return true wenn Server erreichbar ist, false sonst
+     */
+    suspend fun isServerReachable(): Boolean = withContext(Dispatchers.IO) {
+        return@withContext try {
+            val serverUrl = getServerUrl()
+            if (serverUrl == null) {
+                Logger.d(TAG, "❌ Server URL not configured")
+                return@withContext false
+            }
+            
+            val url = URL(serverUrl)
+            val host = url.host
+            val port = if (url.port > 0) url.port else url.defaultPort
+            
+            Logger.d(TAG, "🔍 Checking server reachability: $host:$port")
+            
+            // Socket-Check mit 2s Timeout
+            // Gibt dem Netzwerk Zeit für Initialisierung (DHCP, Routing, Gateway)
+            val socket = Socket()
+            socket.connect(InetSocketAddress(host, port), 2000)
+            socket.close()
+            
+            Logger.d(TAG, "✅ Server is reachable")
+            true
+        } catch (e: Exception) {
+            Logger.d(TAG, "❌ Server not reachable: ${e.message}")
+            false
+        }
+    }
+    
     suspend fun testConnection(): SyncResult = withContext(Dispatchers.IO) {
         return@withContext try {
             val sardine = getSardine() ?: return@withContext SyncResult(
@@ -446,8 +519,10 @@ class WebDavSyncService(private val context: Context) {
     }
     
     private fun saveLastSyncTimestamp() {
+        val now = System.currentTimeMillis()
         prefs.edit()
-            .putLong(Constants.KEY_LAST_SYNC, System.currentTimeMillis())
+            .putLong(Constants.KEY_LAST_SYNC, now)
+            .putLong(Constants.KEY_LAST_SUCCESSFUL_SYNC, now)  // 🔥 v1.1.2: Track successful sync
             .apply()
     }
     
@@ -455,6 +530,10 @@ class WebDavSyncService(private val context: Context) {
         return prefs.getLong(Constants.KEY_LAST_SYNC, 0)
     }
     
+    fun getLastSuccessfulSyncTimestamp(): Long {
+        return prefs.getLong(Constants.KEY_LAST_SUCCESSFUL_SYNC, 0)
+    }
+    
     /**
      * Restore all notes from server - overwrites local storage
      * @return RestoreResult with count of restored notes

android/app/src/main/java/dev/dettmer/simplenotes/utils/Constants.kt

@@ -10,6 +10,11 @@ object Constants {
     const val KEY_AUTO_SYNC = "auto_sync_enabled"
     const val KEY_LAST_SYNC = "last_sync_timestamp"
     
+    // 🔥 v1.1.2: Last Successful Sync Monitoring
+    const val KEY_LAST_SUCCESSFUL_SYNC = "last_successful_sync_time"
+    const val KEY_LAST_SYNC_WARNING_SHOWN = "last_sync_warning_shown_time"
+    const val SYNC_WARNING_THRESHOLD_MS = 24 * 60 * 60 * 1000L  // 24h
+    
     // 🔥 NEU: Sync Interval Configuration
     const val PREF_SYNC_INTERVAL_MINUTES = "sync_interval_minutes"
     const val DEFAULT_SYNC_INTERVAL_MINUTES = 30L

android/app/src/main/java/dev/dettmer/simplenotes/utils/NotificationHelper.kt

@@ -6,12 +6,15 @@ import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
 import android.os.Build
+import android.os.Handler
+import android.os.Looper
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import dev.dettmer.simplenotes.MainActivity
 
 object NotificationHelper {
     
+    private const val TAG = "NotificationHelper"
     private const val CHANNEL_ID = "notes_sync_channel"
     private const val CHANNEL_NAME = "Notizen Synchronisierung"
     private const val CHANNEL_DESCRIPTION = "Benachrichtigungen über Sync-Status"
@@ -38,6 +41,17 @@ object NotificationHelper {
         }
     }
     
+    /**
+     * Löscht alle Sync-Notifications
+     * Sollte beim App-Start aufgerufen werden um alte Notifications zu entfernen
+     */
+    fun clearSyncNotifications(context: Context) {
+        val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) 
+            as NotificationManager
+        manager.cancel(SYNC_NOTIFICATION_ID)
+        Logger.d(TAG, "🗑️ Cleared old sync notifications")
+    }
+    
     /**
      * Zeigt Erfolgs-Notification nach Sync
      */
@@ -240,6 +254,7 @@ object NotificationHelper {
     
     /**
      * Zeigt Fehler-Notification
+     * Auto-Cancel nach 30 Sekunden
      */
     fun showSyncError(context: Context, message: String) {
         // PendingIntent für App-Öffnung
@@ -266,5 +281,47 @@ object NotificationHelper {
         val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) 
             as NotificationManager
         manager.notify(SYNC_NOTIFICATION_ID, notification)
+        
+        // ⭐ NEU: Auto-Cancel nach 30 Sekunden
+        Handler(Looper.getMainLooper()).postDelayed({
+            manager.cancel(SYNC_NOTIFICATION_ID)
+            Logger.d(TAG, "🗑️ Auto-cancelled error notification after 30s timeout")
+        }, 30_000)
+    }
+    
+    /**
+     * Zeigt Warnung wenn Server längere Zeit nicht erreichbar (v1.1.2)
+     * Throttling: Max. 1 Warnung pro 24h
+     */
+    fun showSyncWarning(context: Context, hoursSinceLastSync: Long) {
+        // PendingIntent für App-Öffnung
+        val intent = Intent(context, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+        }
+        val pendingIntent = PendingIntent.getActivity(
+            context,
+            0,
+            intent,
+            PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
+        )
+        
+        val notification = NotificationCompat.Builder(context, CHANNEL_ID)
+            .setSmallIcon(android.R.drawable.stat_notify_error)
+            .setContentTitle("⚠️ Sync-Warnung")
+            .setContentText("Server seit ${hoursSinceLastSync}h nicht erreichbar")
+            .setStyle(NotificationCompat.BigTextStyle()
+                .bigText("Der WebDAV-Server ist seit ${hoursSinceLastSync} Stunden nicht erreichbar. " +
+                        "Bitte prüfe deine Netzwerkverbindung oder Server-Einstellungen."))
+            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+            .setCategory(NotificationCompat.CATEGORY_STATUS)
+            .setContentIntent(pendingIntent)
+            .setAutoCancel(true)
+            .build()
+        
+        val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) 
+            as NotificationManager
+        manager.notify(SYNC_NOTIFICATION_ID, notification)
+        
+        Logger.d(TAG, "⚠️ Showed sync warning: Server unreachable for ${hoursSinceLastSync}h")
     }
 }

android/app/src/main/java/dev/dettmer/simplenotes/utils/UrlValidator.kt

@@ -0,0 +1,107 @@
+package dev.dettmer.simplenotes.utils
+
+import java.net.URL
+
+/**
+ * URL Validator für Network Security (v1.1.2)
+ * Erlaubt HTTP nur für lokale Netzwerke (RFC 1918 Private IPs)
+ */
+object UrlValidator {
+    
+    /**
+     * Prüft ob eine URL eine lokale/private Adresse ist
+     * Erlaubt:
+     * - 192.168.x.x (Class C private)
+     * - 10.x.x.x (Class A private)
+     * - 172.16.x.x - 172.31.x.x (Class B private)
+     * - 127.x.x.x (Localhost)
+     * - .local domains (mDNS/Bonjour)
+     */
+    fun isLocalUrl(url: String): Boolean {
+        return try {
+            val parsedUrl = URL(url)
+            val host = parsedUrl.host.lowercase()
+            
+            // Check for .local domains (e.g., nas.local)
+            if (host.endsWith(".local")) {
+                return true
+            }
+            
+            // Check for localhost
+            if (host == "localhost" || host == "127.0.0.1") {
+                return true
+            }
+            
+            // Parse IP address if it's numeric
+            val ipPattern = """^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$""".toRegex()
+            val match = ipPattern.find(host)
+            
+            if (match != null) {
+                val octets = match.groupValues.drop(1).map { it.toInt() }
+                
+                // Validate octets are in range 0-255
+                if (octets.any { it > 255 }) {
+                    return false
+                }
+                
+                val (o1, o2, o3, o4) = octets
+                
+                // Check RFC 1918 private IP ranges
+                return when {
+                    // 10.0.0.0/8 (10.0.0.0 - 10.255.255.255)
+                    o1 == 10 -> true
+                    
+                    // 172.16.0.0/12 (172.16.0.0 - 172.31.255.255)
+                    o1 == 172 && o2 in 16..31 -> true
+                    
+                    // 192.168.0.0/16 (192.168.0.0 - 192.168.255.255)
+                    o1 == 192 && o2 == 168 -> true
+                    
+                    // 127.0.0.0/8 (Localhost)
+                    o1 == 127 -> true
+                    
+                    else -> false
+                }
+            }
+            
+            // Not a recognized local address
+            false
+        } catch (e: Exception) {
+            // Invalid URL format
+            false
+        }
+    }
+    
+    /**
+     * Validiert ob HTTP URL erlaubt ist
+     * @return Pair<Boolean, String?> - (isValid, errorMessage)
+     */
+    fun validateHttpUrl(url: String): Pair<Boolean, String?> {
+        return try {
+            val parsedUrl = URL(url)
+            
+            // HTTPS ist immer erlaubt
+            if (parsedUrl.protocol.equals("https", ignoreCase = true)) {
+                return Pair(true, null)
+            }
+            
+            // HTTP nur für lokale URLs erlaubt
+            if (parsedUrl.protocol.equals("http", ignoreCase = true)) {
+                if (isLocalUrl(url)) {
+                    return Pair(true, null)
+                } else {
+                    return Pair(
+                        false,
+                        "HTTP ist nur für lokale Server erlaubt (z.B. 192.168.x.x, 10.x.x.x, nas.local). " +
+                        "Für öffentliche Server verwende bitte HTTPS."
+                    )
+                }
+            }
+            
+            // Anderes Protokoll
+            Pair(false, "Ungültiges Protokoll: ${parsedUrl.protocol}. Bitte verwende HTTP oder HTTPS.")
+        } catch (e: Exception) {
+            Pair(false, "Ungültige URL: ${e.message}")
+        }
+    }
+}

android/app/src/main/res/drawable/ic_launcher_background.xml

@@ -1,170 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#3DDC84"
-        android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-</vector>

android/app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -1,30 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:aapt="http://schemas.android.com/aapt"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
-        <aapt:attr name="android:fillColor">
-            <gradient
-                android:endX="85.84757"
-                android:endY="92.4963"
-                android:startX="42.9492"
-                android:startY="49.59793"
-                android:type="linear">
-                <item
-                    android:color="#44000000"
-                    android:offset="0.0" />
-                <item
-                    android:color="#00000000"
-                    android:offset="1.0" />
-            </gradient>
-        </aapt:attr>
-    </path>
-    <path
-        android:fillColor="#FFFFFF"
-        android:fillType="nonZero"
-        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
-        android:strokeWidth="1"
-        android:strokeColor="#00000000" />
-</vector>

android/app/src/main/res/layout/activity_editor.xml

@@ -14,7 +14,7 @@
         android:layout_width="match_parent"
         android:layout_height="?attr/actionBarSize"
         android:elevation="0dp"
-        app:navigationIcon="@android:drawable/ic_menu_close_clear_cancel"
+        app:navigationIcon="?attr/homeAsUpIndicator"
         app:title="@string/edit_note"
         app:titleTextAppearance="@style/TextAppearance.Material3.TitleLarge" />
 

android/app/src/main/res/layout/activity_main.xml

@@ -24,14 +24,22 @@
 
     </com.google.android.material.appbar.AppBarLayout>
 
-    <!-- RecyclerView mit größerem Padding für Material 3 -->
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/recyclerViewNotes"
+    <!-- SwipeRefreshLayout für Pull-to-Refresh (v1.1.2) -->
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:id="@+id/swipeRefreshLayout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:clipToPadding="false"
-        android:padding="16dp"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+        <!-- RecyclerView mit größerem Padding für Material 3 -->
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/recyclerViewNotes"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:clipToPadding="false"
+            android:padding="16dp" />
+
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
     <!-- Material 3 Empty State Card -->
     <com.google.android.material.card.MaterialCardView

android/app/src/main/res/layout/activity_settings.xml

@@ -30,17 +30,6 @@
             android:orientation="vertical"
             android:padding="16dp">
 
-            <!-- Auto-Save Status Indicator -->
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chipAutoSaveStatus"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center_horizontal"
-                android:layout_marginBottom="12dp"
-                android:visibility="gone"
-                android:textSize="12sp"
-                app:chipIconEnabled="false" />
-
             <!-- Material 3 Card: Server Configuration -->
             <com.google.android.material.card.MaterialCardView
                 android:layout_width="match_parent"
@@ -63,15 +52,65 @@
                         android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
                         android:layout_marginBottom="16dp" />
 
-                    <!-- Server URL with Icon -->
-                    <com.google.android.material.textfield.TextInputLayout
+                    <!-- Protocol Selection -->
+                    <TextView
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
-                        android:hint="@string/server_url"
+                        android:text="Verbindungstyp"
+                        android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+                        android:layout_marginBottom="8dp" />
+
+                    <RadioGroup
+                        android:id="@+id/protocolRadioGroup"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:orientation="horizontal"
+                        android:layout_marginBottom="16dp">
+
+                        <com.google.android.material.radiobutton.MaterialRadioButton
+                            android:id="@+id/radioHttp"
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_weight="1"
+                            android:text="🏠 Intern (HTTP)"
+                            android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
+                            android:checked="false" />
+
+                        <com.google.android.material.radiobutton.MaterialRadioButton
+                            android:id="@+id/radioHttps"
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_weight="1"
+                            android:text="🌐 Extern (HTTPS)"
+                            android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
+                            android:checked="true" />
+
+                    </RadioGroup>
+
+                    <!-- Helper Text for Protocol Selection -->
+                    <TextView
+                        android:id="@+id/protocolHintText"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="HTTP nur für lokale Netzwerke (z.B. 192.168.x.x, 10.x.x.x)"
+                        android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+                        android:textColor="?attr/colorOnSurfaceVariant"
+                        android:layout_marginBottom="16dp"
+                        android:paddingStart="4dp"
+                        android:paddingEnd="4dp" />
+
+                    <!-- Server URL with Icon -->
+                    <com.google.android.material.textfield.TextInputLayout
+                        android:id="@+id/textInputLayoutServerUrl"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:hint="Server-Adresse"
                         android:layout_marginBottom="12dp"
                         style="@style/Widget.Material3.TextInputLayout.OutlinedBox"
                         app:startIconDrawable="@android:drawable/ic_menu_compass"
                         app:endIconMode="clear_text"
+                        app:helperText="z.B. http://192.168.0.188:8080/webdav"
+                        app:helperTextEnabled="true"
                         app:boxCornerRadiusTopStart="12dp"
                         app:boxCornerRadiusTopEnd="12dp"
                         app:boxCornerRadiusBottomStart="12dp"
@@ -185,7 +224,7 @@
 
             </com.google.android.material.card.MaterialCardView>
 
-            <!-- Material 3 Card: Auto-Sync Settings -->
+            <!-- Material 3 Card: Synchronisation Settings (Auto-Sync + Interval) -->
             <com.google.android.material.card.MaterialCardView
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -230,6 +269,7 @@
                     <LinearLayout
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
+                        android:layout_marginBottom="16dp"
                         android:orientation="horizontal"
                         android:gravity="center_vertical">
 
@@ -247,87 +287,22 @@
 
                     </LinearLayout>
 
-                </LinearLayout>
-
-            </com.google.android.material.card.MaterialCardView>
-
-            <!-- Material 3 Card: Backup & Restore -->
-            <com.google.android.material.card.MaterialCardView
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:layout_marginBottom="16dp"
-                style="@style/Widget.Material3.CardView.Elevated"
-                app:cardCornerRadius="16dp">
-
-                <LinearLayout
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:orientation="vertical"
-                    android:padding="20dp">
-
-                    <!-- Section Header -->
-                    <TextView
+                    <!-- Divider -->
+                    <View
                         android:layout_width="match_parent"
-                        android:layout_height="wrap_content"
-                        android:text="@string/backup_restore_title"
-                        android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
-                        android:layout_marginBottom="12dp" />
+                        android:layout_height="1dp"
+                        android:layout_marginVertical="16dp"
+                        android:background="?attr/colorOutlineVariant" />
 
-                    <!-- Warning Info Card -->
-                    <com.google.android.material.card.MaterialCardView
-                        android:layout_width="match_parent"
-                        android:layout_height="wrap_content"
-                        android:layout_marginBottom="16dp"
-                        app:cardBackgroundColor="?attr/colorErrorContainer"
-                        app:cardCornerRadius="12dp"
-                        app:cardElevation="0dp">
-
-                        <TextView
-                            android:layout_width="match_parent"
-                            android:layout_height="wrap_content"
-                            android:padding="16dp"
-                            android:text="@string/backup_restore_warning"
-                            android:textAppearance="@style/TextAppearance.Material3.BodySmall"
-                            android:textColor="?attr/colorOnErrorContainer"
-                            android:lineSpacingMultiplier="1.3" />
-
-                    </com.google.android.material.card.MaterialCardView>
-
-                    <!-- Restore Button -->
-                    <Button
-                        android:id="@+id/buttonRestoreFromServer"
-                        android:layout_width="match_parent"
-                        android:layout_height="wrap_content"
-                        android:text="@string/restore_from_server"
-                        style="@style/Widget.Material3.Button.TonalButton" />
-
-                </LinearLayout>
-
-            </com.google.android.material.card.MaterialCardView>
-
-            <!-- Material 3 Card: Sync Interval Configuration -->
-            <com.google.android.material.card.MaterialCardView
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:layout_marginBottom="16dp"
-                style="@style/Widget.Material3.CardView.Elevated"
-                app:cardCornerRadius="16dp">
-
-                <LinearLayout
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:orientation="vertical"
-                    android:padding="20dp">
-
-                    <!-- Section Header -->
+                    <!-- Sync Interval Section -->
                     <TextView
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:text="Sync-Intervall"
-                        android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
+                        android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
                         android:layout_marginBottom="12dp" />
 
-                    <!-- Info Card -->
+                    <!-- Interval Info Card -->
                     <com.google.android.material.card.MaterialCardView
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
@@ -412,6 +387,60 @@
 
             </com.google.android.material.card.MaterialCardView>
 
+            <!-- Material 3 Card: Backup & Restore -->
+            <com.google.android.material.card.MaterialCardView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="16dp"
+                style="@style/Widget.Material3.CardView.Elevated"
+                app:cardCornerRadius="16dp">
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical"
+                    android:padding="20dp">
+
+                    <!-- Section Header -->
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="@string/backup_restore_title"
+                        android:textAppearance="@style/TextAppearance.Material3.TitleMedium"
+                        android:layout_marginBottom="12dp" />
+
+                    <!-- Warning Info Card -->
+                    <com.google.android.material.card.MaterialCardView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginBottom="16dp"
+                        app:cardBackgroundColor="?attr/colorErrorContainer"
+                        app:cardCornerRadius="12dp"
+                        app:cardElevation="0dp">
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:padding="16dp"
+                            android:text="@string/backup_restore_warning"
+                            android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+                            android:textColor="?attr/colorOnErrorContainer"
+                            android:lineSpacingMultiplier="1.3" />
+
+                    </com.google.android.material.card.MaterialCardView>
+
+                    <!-- Restore Button -->
+                    <Button
+                        android:id="@+id/buttonRestoreFromServer"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="@string/restore_from_server"
+                        style="@style/Widget.Material3.Button.TonalButton" />
+
+                </LinearLayout>
+
+            </com.google.android.material.card.MaterialCardView>
+
             <!-- Material 3 Card: About Section -->
             <com.google.android.material.card.MaterialCardView
                 android:layout_width="match_parent"

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <background android:drawable="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
 </adaptive-icon>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <background android:drawable="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
 </adaptive-icon>

android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <!-- Allow HTTP for all connections during development/testing -->
+    <!-- Production validation happens in UrlValidator.kt to restrict HTTP to:
+         - Private IP ranges: 192.168.x.x, 10.x.x.x, 172.16-31.x.x, 127.x.x.x
+         - .local domains (mDNS/Bonjour)
+         
+         This permissive config is necessary because Android's Network Security Config
+         doesn't support IP-based rules, only domain patterns.
+         We handle security through application-level validation instead. -->
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="system" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sat Dec 20 00:06:31 CET 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionSha256Sum=20f1b1176237254a6fc204d8434196fa11a4cfb387567519c61556e8710aed78
 distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true

android/gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015 the original authors.
+# Copyright © 2015-2021 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -114,7 +114,7 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH="\\\"\\\""
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 
 # Determine the Java command to use to start the JVM.
@@ -213,7 +213,7 @@ DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
-        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
 # Stop when "xargs" is not available.

android/gradlew.bat

@@ -1,94 +1,94 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-@rem SPDX-License-Identifier: Apache-2.0
-@rem
-
-@if "%DEBUG%"=="" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%"=="" set DIRNAME=.
-@rem This is normally unused
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if %ERRORLEVEL% equ 0 goto execute
-
-echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation. 1>&2
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto execute
-
-echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation. 1>&2
-
-goto fail
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=
-
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
-
-:end
-@rem End local scope for the variables with windows NT shell
-if %ERRORLEVEL% equ 0 goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-set EXIT_CODE=%ERRORLEVEL%
-if %EXIT_CODE% equ 0 set EXIT_CODE=1
-if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
-exit /b %EXIT_CODE%
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/key.properties.example

@@ -0,0 +1,21 @@
+# Android Signing Configuration
+# 
+# ANLEITUNG FÜR LOKALE BUILDS:
+# 1. Kopiere diese Datei nach "key.properties" (ohne .example)
+# 2. Fülle die Werte mit deinen echten Keystore-Daten aus
+# 3. Die key.properties Datei ist in .gitignore und wird NICHT committet
+#
+# WICHTIG: Diese Datei darf NIEMALS ins Git-Repository gelangen!
+# Sie enthält sensible Signing-Keys für die App-Veröffentlichung.
+
+# Pfad zum Keystore (relativ zum android/app Ordner)
+storeFile=simple-notes-release.jks
+
+# Keystore Password
+storePassword=DEIN_KEYSTORE_PASSWORD
+
+# Key Alias (meist "key0" oder ein selbst gewählter Name)
+keyAlias=DEIN_KEY_ALIAS
+
+# Key Password
+keyPassword=DEIN_KEY_PASSWORD

android/scripts/README.md

@@ -0,0 +1,192 @@
+# Android Build Scripts
+
+Nützliche Scripts für die lokale Entwicklung und Release-Erstellung.
+
+## 📜 Verfügbare Scripts
+
+### 1. `create-keystore.fish` - Neuen Release-Keystore erstellen
+
+**Wann verwenden:**
+- ✅ Erstmaliges Setup des Projekts
+- ✅ Keystore-Passwort vergessen
+- ✅ Keystore beschädigt oder verloren
+- ❌ **NICHT** verwenden, wenn bereits User existieren (macht alte APKs inkompatibel!)
+
+**Verwendung:**
+```bash
+cd /home/liq/gitProjects/simple-notes-sync/android
+./scripts/create-keystore.fish
+```
+
+**Das Script:**
+1. Erstellt einen neuen 4096-Bit RSA-Keystore
+2. Generiert `app/simple-notes-release.jks`
+3. Erstellt `key.properties` mit den Zugangsdaten
+4. Zeigt Base64-kodierten Keystore für GitHub Secrets
+5. Gibt SHA256-Fingerprint zur Verifikation aus
+
+**Output:**
+- ✅ `app/simple-notes-release.jks` - Der Keystore
+- ✅ `key.properties` - Lokale Signing-Konfiguration
+- 📋 GitHub Secrets zum Kopieren
+
+---
+
+### 2. `verify-secrets.fish` - GitHub Secrets & Keystore verifizieren
+
+**Wann verwenden:**
+- ✅ Nach `create-keystore.fish` zur Verifikation
+- ✅ Vor einem Release-Build zum Troubleshooting
+- ✅ Um zu prüfen ob alles korrekt konfiguriert ist
+
+**Verwendung:**
+```bash
+cd /home/liq/gitProjects/simple-notes-sync/android
+./scripts/verify-secrets.fish
+```
+
+**Das Script prüft:**
+- GitHub CLI Installation & Authentifizierung
+- Ob alle 4 erforderlichen GitHub Secrets gesetzt sind
+- Ob `key.properties` lokal existiert
+- Ob der Keystore existiert
+- Zeigt SHA256-Fingerprint des Keystores
+
+**Output:**
+- ✅ Status aller Secrets
+- ✅ Status der lokalen Konfiguration
+- 💡 Empfehlungen bei Problemen
+
+---
+
+### 3. `build-release-local.fish` - Lokal signierte Release-APKs bauen
+
+**Wann verwenden:**
+- ✅ Lokale Test-APKs erstellen, die mit Releases kompatibel sind
+- ✅ APKs vor dem GitHub Release testen
+- ✅ Schneller als GitHub Actions für Tests
+
+**Voraussetzung:**
+- `key.properties` muss existieren (via `create-keystore.fish` erstellt)
+
+**Verwendung:**
+```bash
+cd /home/liq/gitProjects/simple-notes-sync/android
+./scripts/build-release-local.fish
+```
+
+**Interaktive Auswahl:**
+1. Standard Flavor (empfohlen)
+2. F-Droid Flavor
+3. Beide Flavors
+
+**Output:**
+- `app/build/outputs/apk/standard/release/` - Signierte Standard APKs
+- `app/build/outputs/apk/fdroid/release/` - Signierte F-Droid APKs
+
+---
+
+## 🚀 Kompletter Workflow (von 0 auf Release)
+
+### Erstmaliges Setup
+
+```bash
+cd /home/liq/gitProjects/simple-notes-sync/android
+
+# 1. Keystore erstellen (mit automatischer GitHub Secrets-Konfiguration!)
+./scripts/create-keystore.fish
+# → Folge den Anweisungen, speichere die Passwörter!
+# → GitHub Secrets werden automatisch via GitHub CLI gesetzt
+
+# 2. Verifiziere die Konfiguration
+./scripts/verify-secrets.fish
+# → Prüft ob alle Secrets gesetzt sind
+# → Zeigt Keystore-Informationen
+
+# 3. Teste lokalen Build
+./scripts/build-release-local.fish
+# → Wähle "1" für Standard Flavor
+
+# 4. Verifiziere Signatur
+keytool -printcert -jarfile app/build/outputs/apk/standard/release/app-standard-universal-release.apk
+```
+
+### Vor jedem Release
+
+```bash
+# 1. Code committen und pushen
+git add .
+git commit -m "✨ Neue Features"
+git push origin main
+
+# 2. GitHub Actions erstellt automatisch Release
+# → Workflow läuft: .github/workflows/build-production-apk.yml
+# → Erstellt Release mit signierten APKs
+
+# Optional: Lokalen Test-Build vorher
+./scripts/build-release-local.fish
+```
+
+---
+
+## 🔐 Sicherheitshinweise
+
+### ⚠️ Diese Dateien NIEMALS committen:
+- `key.properties` - Enthält Keystore-Passwörter
+- `*.jks` / `*.keystore` - Der Keystore selbst
+- Beide sind bereits in `.gitignore`
+
+### ✅ Diese Werte sicher speichern:
+- Keystore-Passwort
+- Key-Alias
+- Key-Passwort
+- Base64-kodierter Keystore (für GitHub Secrets)
+
+**Empfehlung:** Nutze einen Passwort-Manager (Bitwarden, 1Password, etc.)
+
+---
+
+## 🛠️ Troubleshooting
+
+### "Keystore not found"
+```bash
+# Prüfe ob Keystore existiert
+ls -la app/simple-notes-release.jks
+
+# Falls nicht: Neu erstellen
+./scripts/create-keystore.fish
+```
+
+### "key.properties not found"
+```bash
+# Prüfe ob Datei existiert
+ls -la key.properties
+
+# Falls nicht: Keystore neu erstellen oder manuell anlegen
+./scripts/create-keystore.fish
+```
+
+### "Signature mismatch" beim App-Update
+**Problem:** Lokaler Build hat andere Signatur als GitHub Release
+
+**Ursache:** Unterschiedliche Keystores oder Passwörter
+
+**Lösung:**
+1. Vergleiche SHA256-Fingerprints:
+   ```bash
+   # Lokal
+   keytool -list -v -keystore app/simple-notes-release.jks
+   
+   # GitHub Release-APK
+   keytool -printcert -jarfile ~/Downloads/simple-notes-v1.1.0.apk
+   ```
+2. Müssen **identisch** sein!
+3. Falls nicht: GitHub Secrets mit lokaler `key.properties` synchronisieren
+
+---
+
+## 📚 Weitere Dokumentation
+
+- `../LOCAL_BUILDS.md` - Detaillierte Anleitung für lokale Builds
+- `../.github/workflows/build-production-apk.yml` - GitHub Actions Workflow
+- `../app/build.gradle.kts` - Build-Konfiguration

android/scripts/build-release-local.fish

@@ -0,0 +1,104 @@
+#!/usr/bin/env fish
+
+# Simple Notes Sync - Lokaler Release Build
+# Erstellt signierte APKs, die mit GitHub Release-APKs kompatibel sind
+
+set -l SCRIPT_DIR (dirname (status --current-filename))
+set -l ANDROID_DIR (realpath "$SCRIPT_DIR/..")
+set -l KEY_PROPERTIES "$ANDROID_DIR/key.properties"
+
+echo "🔨 Simple Notes Sync - Lokaler Release Build"
+echo ""
+
+# 1. Prüfe ob key.properties existiert
+if not test -f "$KEY_PROPERTIES"
+    echo "❌ Fehler: key.properties nicht gefunden!"
+    echo ""
+    echo "Bitte erstelle die Datei:"
+    echo "  cd $ANDROID_DIR"
+    echo "  cp key.properties.example key.properties"
+    echo ""
+    echo "Und fülle sie mit den echten Keystore-Daten aus."
+    echo "Siehe: android/LOCAL_BUILDS.md"
+    exit 1
+end
+
+# 2. Prüfe ob Keystore existiert
+set -l KEYSTORE "$ANDROID_DIR/app/simple-notes-release.jks"
+if not test -f "$KEYSTORE"
+    echo "❌ Fehler: Keystore nicht gefunden!"
+    echo "  Erwartet: $KEYSTORE"
+    exit 1
+end
+
+echo "✅ key.properties gefunden"
+echo "✅ Keystore gefunden"
+echo ""
+
+# 3. Build-Typ abfragen
+echo "Welchen Build möchtest du erstellen?"
+echo "  1) Standard Flavor (empfohlen)"
+echo "  2) F-Droid Flavor"
+echo "  3) Beide Flavors"
+echo ""
+read -P "Auswahl [1-3]: " -n 1 choice
+
+echo ""
+echo ""
+
+switch $choice
+    case 1
+        echo "🏗️  Baue Standard Release APKs..."
+        cd "$ANDROID_DIR"
+        ./gradlew assembleStandardRelease --no-daemon
+        
+        if test $status -eq 0
+            echo ""
+            echo "✅ Build erfolgreich!"
+            echo ""
+            echo "📦 APKs findest du hier:"
+            echo "  $ANDROID_DIR/app/build/outputs/apk/standard/release/"
+            ls -lh "$ANDROID_DIR/app/build/outputs/apk/standard/release/"*.apk
+        end
+        
+    case 2
+        echo "🏗️  Baue F-Droid Release APKs..."
+        cd "$ANDROID_DIR"
+        ./gradlew assembleFdroidRelease --no-daemon
+        
+        if test $status -eq 0
+            echo ""
+            echo "✅ Build erfolgreich!"
+            echo ""
+            echo "📦 APKs findest du hier:"
+            echo "  $ANDROID_DIR/app/build/outputs/apk/fdroid/release/"
+            ls -lh "$ANDROID_DIR/app/build/outputs/apk/fdroid/release/"*.apk
+        end
+        
+    case 3
+        echo "🏗️  Baue Standard + F-Droid Release APKs..."
+        cd "$ANDROID_DIR"
+        ./gradlew assembleStandardRelease assembleFdroidRelease --no-daemon
+        
+        if test $status -eq 0
+            echo ""
+            echo "✅ Build erfolgreich!"
+            echo ""
+            echo "📦 Standard APKs:"
+            echo "  $ANDROID_DIR/app/build/outputs/apk/standard/release/"
+            ls -lh "$ANDROID_DIR/app/build/outputs/apk/standard/release/"*.apk
+            echo ""
+            echo "📦 F-Droid APKs:"
+            echo "  $ANDROID_DIR/app/build/outputs/apk/fdroid/release/"
+            ls -lh "$ANDROID_DIR/app/build/outputs/apk/fdroid/release/"*.apk
+        end
+        
+    case '*'
+        echo "❌ Ungültige Auswahl"
+        exit 1
+end
+
+echo ""
+echo "💡 Tipp: Du kannst die APK per HTTP Server verteilen:"
+echo "   cd app/build/outputs/apk/standard/release"
+echo "   python3 -m http.server 8892"

android/scripts/create-keystore.fish

@@ -0,0 +1,279 @@
+#!/usr/bin/env fish
+
+# Simple Notes Sync - Keystore Generator
+# Erstellt einen neuen Release-Keystore für App-Signierung
+
+set -l SCRIPT_DIR (dirname (status --current-filename))
+set -l ANDROID_DIR (realpath "$SCRIPT_DIR/..")
+set -l KEYSTORE_PATH "$ANDROID_DIR/app/simple-notes-release.jks"
+set -l KEY_PROPERTIES "$ANDROID_DIR/key.properties"
+
+echo "🔐 Simple Notes Sync - Keystore Generator"
+echo ""
+echo "⚠️  WICHTIG: Dieser Keystore wird für alle zukünftigen App-Releases verwendet!"
+echo "    Speichere die Zugangsdaten sicher ab (z.B. in einem Passwort-Manager)."
+echo ""
+
+# Prüfe ob Keystore bereits existiert
+if test -f "$KEYSTORE_PATH"
+    echo "⚠️  Ein Keystore existiert bereits:"
+    echo "    $KEYSTORE_PATH"
+    echo ""
+    read -P "Möchtest du ihn überschreiben? (Dies macht alte APKs inkompatibel!) [j/N]: " -n 1 overwrite
+    echo ""
+    
+    if not string match -qi "j" $overwrite
+        echo "❌ Abgebrochen."
+        exit 1
+    end
+    
+    echo "🗑️  Lösche alten Keystore..."
+    rm "$KEYSTORE_PATH"
+end
+
+echo ""
+echo "📝 Bitte gib die folgenden Informationen ein:"
+echo ""
+
+# App-Informationen sammeln
+read -P "Dein Name (z.B. 'Max Mustermann'): " developer_name
+read -P "Organisation (z.B. 'dettmer.dev'): " organization
+read -P "Stadt: " city
+read -P "Land (z.B. 'DE'): " country
+
+echo ""
+echo "🔒 Keystore-Passwörter:"
+echo ""
+echo "Möchtest du sichere Passwörter automatisch generieren lassen?"
+read -P "[J/n]: " -n 1 auto_generate
+echo ""
+
+if string match -qi "n" $auto_generate
+    # Manuelle Passwort-Eingabe
+    echo ""
+    echo "📝 Manuelle Passwort-Eingabe:"
+    echo ""
+    
+    while true
+        read -sP "Keystore-Passwort: " keystore_password
+        echo ""
+        read -sP "Keystore-Passwort (Bestätigung): " keystore_password_confirm
+        echo ""
+        
+        if test "$keystore_password" = "$keystore_password_confirm"
+            break
+        else
+            echo "❌ Passwörter stimmen nicht überein. Bitte erneut eingeben."
+            echo ""
+        end
+    end
+    
+    while true
+        read -sP "Key-Passwort: " key_password
+        echo ""
+        read -sP "Key-Passwort (Bestätigung): " key_password_confirm
+        echo ""
+        
+        if test "$key_password" = "$key_password_confirm"
+            break
+        else
+            echo "❌ Passwörter stimmen nicht überein. Bitte erneut eingeben."
+            echo ""
+        end
+    end
+else
+    # Automatische Passwort-Generierung
+    echo ""
+    echo "🔐 Generiere sichere Passwörter (32 Zeichen, alphanumerisch)..."
+    
+    # Generiere sichere, zufällige Passwörter (alphanumerisch, 32 Zeichen)
+    set keystore_password (openssl rand -base64 32 | tr -d '/+=' | head -c 32)
+    set key_password (openssl rand -base64 32 | tr -d '/+=' | head -c 32)
+    
+    echo "✅ Passwörter generiert"
+    echo ""
+    echo "⚠️  WICHTIG: Speichere diese Passwörter jetzt in deinem Passwort-Manager!"
+    echo ""
+    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo "Keystore-Passwort: $keystore_password"
+    echo "Key-Passwort:      $key_password"
+    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo ""
+    read -P "Passwörter gespeichert? Drücke Enter zum Fortfahren..."
+end
+
+set -l key_alias "simple-notes-key"
+
+echo ""
+echo "🏗️  Erstelle Keystore..."
+echo ""
+
+# Keystore erstellen
+keytool -genkey \
+    -v \
+    -keystore "$KEYSTORE_PATH" \
+    -alias "$key_alias" \
+    -keyalg RSA \
+    -keysize 4096 \
+    -validity 10000 \
+    -storepass "$keystore_password" \
+    -keypass "$key_password" \
+    -dname "CN=$developer_name, OU=Simple Notes Sync, O=$organization, L=$city, C=$country"
+
+if test $status -ne 0
+    echo ""
+    echo "❌ Fehler beim Erstellen des Keystores!"
+    exit 1
+end
+
+echo ""
+echo "✅ Keystore erfolgreich erstellt!"
+echo ""
+
+# key.properties erstellen
+echo "📝 Erstelle key.properties..."
+echo "storeFile=simple-notes-release.jks" > "$KEY_PROPERTIES"
+echo "storePassword=$keystore_password" >> "$KEY_PROPERTIES"
+echo "keyAlias=$key_alias" >> "$KEY_PROPERTIES"
+echo "keyPassword=$key_password" >> "$KEY_PROPERTIES"
+
+echo "✅ key.properties erstellt"
+echo ""
+
+# Keystore-Info anzeigen
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "📋 KEYSTORE-INFORMATIONEN - SICHER SPEICHERN!"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+echo "Keystore-Pfad:      $KEYSTORE_PATH"
+echo "Key-Alias:          $key_alias"
+echo "Keystore-Passwort:  $keystore_password"
+echo "Key-Passwort:       $key_password"
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+# Base64-kodierten Keystore für GitHub Secrets
+echo "🔐 Base64-kodierter Keystore für GitHub Secrets:"
+echo ""
+set -l keystore_base64 (base64 -w 0 "$KEYSTORE_PATH")
+echo "$keystore_base64"
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+# GitHub Secrets konfigurieren
+echo "<22> GitHub Secrets konfigurieren..."
+echo ""
+
+# Prüfe ob GitHub CLI installiert ist
+if not command -v gh &> /dev/null
+    echo "⚠️  GitHub CLI (gh) nicht gefunden!"
+    echo ""
+    echo "📝 Manuelle Konfiguration erforderlich:"
+    echo ""
+    echo "1. Gehe zu: https://github.com/inentory69/simple-notes-sync/settings/secrets/actions"
+    echo "2. Erstelle/Aktualisiere folgende Secrets:"
+    echo ""
+    echo "   KEYSTORE_BASE64:"
+    echo "   $keystore_base64"
+    echo ""
+    echo "   KEYSTORE_PASSWORD:"
+    echo "   $keystore_password"
+    echo ""
+    echo "   KEY_ALIAS:"
+    echo "   $key_alias"
+    echo ""
+    echo "   KEY_PASSWORD:"
+    echo "   $key_password"
+    echo ""
+    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo ""
+else
+    # GitHub CLI verfügbar - automatisch Secrets erstellen
+    echo "✅ GitHub CLI gefunden"
+    echo ""
+    
+    # Prüfe ob authentifiziert
+    if not gh auth status &> /dev/null
+        echo "⚠️  Nicht bei GitHub authentifiziert!"
+        echo ""
+        read -P "Möchtest du dich jetzt authentifizieren? [j/N]: " -n 1 do_auth
+        echo ""
+        
+        if string match -qi "j" $do_auth
+            gh auth login
+        else
+            echo "❌ Überspringe automatische Secret-Konfiguration"
+            echo ""
+            echo "📝 Manuelle Konfiguration erforderlich (siehe oben)"
+            echo ""
+            echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+            echo ""
+            return
+        end
+    end
+    
+    echo "🔐 Erstelle/Aktualisiere GitHub Secrets..."
+    echo ""
+    
+    set -l repo "inventory69/simple-notes-sync"
+    
+    # KEYSTORE_BASE64
+    echo "$keystore_base64" | gh secret set KEYSTORE_BASE64 --repo $repo
+    if test $status -eq 0
+        echo "✅ KEYSTORE_BASE64 gesetzt"
+    else
+        echo "❌ Fehler beim Setzen von KEYSTORE_BASE64"
+    end
+    
+    # KEYSTORE_PASSWORD
+    echo "$keystore_password" | gh secret set KEYSTORE_PASSWORD --repo $repo
+    if test $status -eq 0
+        echo "✅ KEYSTORE_PASSWORD gesetzt"
+    else
+        echo "❌ Fehler beim Setzen von KEYSTORE_PASSWORD"
+    end
+    
+    # KEY_ALIAS
+    echo "$key_alias" | gh secret set KEY_ALIAS --repo $repo
+    if test $status -eq 0
+        echo "✅ KEY_ALIAS gesetzt"
+    else
+        echo "❌ Fehler beim Setzen von KEY_ALIAS"
+    end
+    
+    # KEY_PASSWORD
+    echo "$key_password" | gh secret set KEY_PASSWORD --repo $repo
+    if test $status -eq 0
+        echo "✅ KEY_PASSWORD gesetzt"
+    else
+        echo "❌ Fehler beim Setzen von KEY_PASSWORD"
+    end
+    
+    echo ""
+    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo ""
+    echo "✅ GitHub Secrets erfolgreich konfiguriert!"
+    echo ""
+    echo "🔍 Verifizieren:"
+    echo "   gh secret list --repo $repo"
+    echo ""
+    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo ""
+end
+
+# Signatur-Fingerprint anzeigen
+echo "🔑 SHA256-Fingerprint (zur Verifikation):"
+keytool -list -v -keystore "$KEYSTORE_PATH" -storepass "$keystore_password" | grep "SHA256:"
+echo ""
+
+echo "✅ Setup abgeschlossen!"
+echo ""
+echo "💡 Nächste Schritte:"
+echo "   1. Speichere die obigen Informationen in einem Passwort-Manager"
+echo "   2. Konfiguriere die GitHub Secrets (siehe oben)"
+echo "   3. Teste den lokalen Build:"
+echo "      cd $ANDROID_DIR"
+echo "      ./gradlew assembleStandardRelease"
+echo ""

android/scripts/verify-secrets.fish

@@ -0,0 +1,150 @@
+#!/usr/bin/env fish
+
+# Simple Notes Sync - GitHub Secrets Verifier
+# Verifiziert ob die GitHub Secrets korrekt konfiguriert sind
+
+set -l repo "inventory69/simple-notes-sync"
+
+echo "🔍 GitHub Secrets Verifier"
+echo ""
+
+# Prüfe ob GitHub CLI installiert ist
+if not command -v gh &> /dev/null
+    echo "❌ GitHub CLI (gh) nicht gefunden!"
+    echo ""
+    echo "Installation:"
+    echo "  Arch Linux:  sudo pacman -S github-cli"
+    echo "  Ubuntu:      sudo apt install gh"
+    echo "  macOS:       brew install gh"
+    echo ""
+    exit 1
+end
+
+# Prüfe Authentifizierung
+if not gh auth status &> /dev/null
+    echo "❌ Nicht bei GitHub authentifiziert!"
+    echo ""
+    echo "Authentifizierung starten:"
+    echo "  gh auth login"
+    echo ""
+    exit 1
+end
+
+echo "✅ GitHub CLI authentifiziert"
+echo ""
+
+# Liste alle Secrets auf
+echo "📋 Konfigurierte Secrets für $repo:"
+echo ""
+gh secret list --repo $repo
+
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+# Prüfe ob alle erforderlichen Secrets vorhanden sind
+set -l required_secrets "KEYSTORE_BASE64" "KEYSTORE_PASSWORD" "KEY_ALIAS" "KEY_PASSWORD"
+set -l missing_secrets
+
+for secret in $required_secrets
+    if not gh secret list --repo $repo | grep -q "^$secret"
+        set -a missing_secrets $secret
+    end
+end
+
+if test (count $missing_secrets) -gt 0
+    echo "❌ Fehlende Secrets:"
+    for secret in $missing_secrets
+        echo "   - $secret"
+    end
+    echo ""
+    echo "💡 Tipp: Führe create-keystore.fish aus, um die Secrets zu erstellen"
+else
+    echo "✅ Alle erforderlichen Secrets sind konfiguriert!"
+    echo ""
+    echo "Required Secrets:"
+    for secret in $required_secrets
+        echo "   ✓ $secret"
+    end
+end
+
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+# Prüfe ob key.properties lokal existiert
+set -l SCRIPT_DIR (dirname (status --current-filename))
+set -l ANDROID_DIR (realpath "$SCRIPT_DIR/..")
+set -l KEY_PROPERTIES "$ANDROID_DIR/key.properties"
+
+if test -f "$KEY_PROPERTIES"
+    echo "✅ Lokale key.properties gefunden: $KEY_PROPERTIES"
+    echo ""
+    echo "📋 Inhalt (Passwörter verborgen):"
+    cat "$KEY_PROPERTIES" | sed 's/\(Password=\).*/\1***HIDDEN***/g'
+else
+    echo "⚠️  Lokale key.properties nicht gefunden: $KEY_PROPERTIES"
+    echo ""
+    echo "💡 Tipp: Führe create-keystore.fish aus, um sie zu erstellen"
+end
+
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+# Prüfe ob Keystore existiert
+set -l KEYSTORE "$ANDROID_DIR/app/simple-notes-release.jks"
+if test -f "$KEYSTORE"
+    echo "✅ Keystore gefunden: $KEYSTORE"
+    
+    # Zeige Keystore-Info (wenn key.properties existiert)
+    if test -f "$KEY_PROPERTIES"
+        set -l store_password (grep "storePassword=" "$KEY_PROPERTIES" | cut -d'=' -f2)
+        
+        echo ""
+        echo "🔑 Keystore-Informationen:"
+        keytool -list -v -keystore "$KEYSTORE" -storepass "$store_password" 2>/dev/null | grep -E "(Alias|Creation date|Valid|SHA256)" | head -10
+    end
+else
+    echo "⚠️  Keystore nicht gefunden: $KEYSTORE"
+    echo ""
+    echo "💡 Tipp: Führe create-keystore.fish aus, um ihn zu erstellen"
+end
+
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+# Zusammenfassung
+set -l issues 0
+
+if test (count $missing_secrets) -gt 0
+    set issues (math $issues + 1)
+end
+
+if not test -f "$KEY_PROPERTIES"
+    set issues (math $issues + 1)
+end
+
+if not test -f "$KEYSTORE"
+    set issues (math $issues + 1)
+end
+
+if test $issues -eq 0
+    echo "🎉 Alles konfiguriert! Du kannst jetzt Releases erstellen."
+    echo ""
+    echo "🚀 Nächste Schritte:"
+    echo "   1. Lokalen Build testen:"
+    echo "      ./scripts/build-release-local.fish"
+    echo ""
+    echo "   2. Code committen und pushen:"
+    echo "      git push origin main"
+    echo ""
+    echo "   3. GitHub Actions erstellt automatisch Release"
+else
+    echo "⚠️  $issues Problem(e) gefunden - siehe oben"
+    echo ""
+    echo "💡 Lösung: Führe create-keystore.fish aus"
+end
+
+echo ""

fastlane/metadata/android/de-DE/changelogs/3.txt

@@ -0,0 +1,18 @@
+🐛 Bugfixes v1.1.1
+
+✅ Keine Fehler-Notifications in fremden WiFi-Netzwerken
+- Server-Check vor Sync (2s Timeout)
+- Stiller Abbruch wenn Server offline
+
+✅ WiFi-Connect Fixes
+- Pre-Check wartet bis Netzwerk bereit ist
+- Keine Fehler bei Netzwerk-Init
+
+🔧 Notifications
+- Alte Notifications beim Start gelöscht
+- Fehler verschwinden nach 30s
+
+📱 UI
+- Sync-Icon nur wenn konfiguriert
+- Swipe-to-Delete ohne Flackern
+- Nach Speichern: Scroll to top

fastlane/metadata/android/de-DE/changelogs/4.txt

@@ -0,0 +1,12 @@
+v1.1.2 - UX & Performance
+
+• "Job was cancelled" Fehler behoben
+• Zurück-Pfeil statt X im Editor
+• Pull-to-Refresh für manuellen Sync
+• HTTP/HTTPS Protokoll-Auswahl (Radio Buttons)
+• Inline Fehler-Anzeige (keine Toast-Spam)
+• Settings gruppiert (Auto-Sync & Intervall)
+• Sync nur bei tatsächlichen Änderungen (spart Batterie)
+• 24h Server-Offline Warnung
+• HTTP nur für lokale Netzwerke (RFC 1918 IPs)
+• Auto-Save Benachrichtigungen entfernt

fastlane/metadata/android/en-US/changelogs/3.txt

@@ -0,0 +1,18 @@
+🐛 Bugfixes v1.1.1
+
+✅ No error notifications in foreign WiFi networks
+- Server check before sync (2s timeout)
+- Silent abort when server offline
+
+✅ WiFi-connect fixes
+- Pre-check waits until network ready
+- No errors during network init
+
+🔧 Notifications
+- Old notifications cleared on start
+- Errors disappear after 30s
+
+📱 UI
+- Sync icon only when configured
+- Swipe-to-delete without flickering
+- After saving: Scroll to top

fastlane/metadata/android/en-US/changelogs/4.txt

@@ -0,0 +1,12 @@
+v1.1.2 - UX & Performance
+
+• Fixed "Job was cancelled" error notifications
+• Back arrow instead of X in editor
+• Pull-to-Refresh for manual sync
+• HTTP/HTTPS protocol selector (radio buttons)
+• Inline error display (no toast spam)
+• Grouped settings (Auto-Sync & Interval)
+• Sync only on actual changes (saves battery)
+• 24h server offline warning
+• HTTP only for local networks (RFC 1918 IPs)
+• Removed auto-save notifications

fastlane/metadata/android/en-US/full_description.txt

@@ -0,0 +1,37 @@
+Simple Notes Sync is a minimalist note-taking app with WebDAV synchronization.
+
+KEY FEATURES:
+
+• Create and edit simple notes
+• WebDAV synchronization with your own server
+• Automatic synchronization on home WiFi
+• Configurable sync interval (15/30/60 minutes)
+• Transparent battery usage display
+• Material Design 3 with Dynamic Colors (Android 12+)
+• Swipe-to-delete with confirmation dialog
+• Server backup & restore
+• Fully usable offline
+• No ads, no trackers
+
+PRIVACY:
+
+Your data stays with you! The app only communicates with your own WebDAV server. No cloud services, no tracking libraries, no analytics tools.
+
+SYNCHRONIZATION:
+
+• Supports all WebDAV servers (Nextcloud, ownCloud, etc.)
+• Configurable interval: 15, 30, or 60 minutes
+• Measured battery consumption: only ~0.4% per day (at 30min)
+• Doze Mode optimized for reliable background syncs
+• Manual synchronization available anytime
+• Conflict-free merging through timestamps
+
+MATERIAL DESIGN 3:
+
+• Modern user interface
+• Dynamic Colors (Material You) on Android 12+
+• Dark Mode support
+• Intuitive gestures (Swipe-to-delete)
+
+Open Source under MIT License
+Source code: https://github.com/inventory69/simple-notes-sync

fastlane/metadata/android/en-US/short_description.txt

@@ -0,0 +1 @@
+Simple note-taking app with WebDAV synchronization

fastlane/metadata/android/en-US/title.txt

@@ -0,0 +1 @@
+Simple Notes Sync

metadata/dev.dettmer.simplenotes.yml

@@ -0,0 +1,53 @@
+Categories:
+  - Writing
+License: MIT
+AuthorName: Liq Dettmer
+AuthorEmail: liq@dettmer.dev
+AuthorWebSite: https://dettmer.dev
+SourceCode: https://github.com/inventory69/simple-notes-sync
+IssueTracker: https://github.com/inventory69/simple-notes-sync/issues
+Changelog: https://github.com/inventory69/simple-notes-sync/releases
+
+AutoName: Simple Notes Sync
+
+RepoType: git
+Repo: https://github.com/inventory69/simple-notes-sync.git
+
+AntiFeatures:
+  NonFreeNet:
+    en-US: |-
+      Allows unencrypted HTTP connections to self-hosted WebDAV servers on local networks.
+      Starting with v1.1.2, HTTP connections will be restricted to:
+      - Private IP ranges (RFC 1918: 10.x.x.x, 172.16-31.x.x, 192.168.x.x)
+      - Localhost (127.0.0.1, ::1)
+      - .local domains (mDNS)
+      HTTPS is recommended and supported for all connections.
+    de-DE: |-
+      Erlaubt unverschlüsselte HTTP-Verbindungen zu selbst gehosteten WebDAV-Servern in lokalen Netzwerken.
+      Ab Version 1.1.2 werden HTTP-Verbindungen eingeschränkt auf:
+      - Private IP-Bereiche (RFC 1918: 10.x.x.x, 172.16-31.x.x, 192.168.x.x)
+      - Localhost (127.0.0.1, ::1)
+      - .local-Domains (mDNS)
+      HTTPS wird empfohlen und für alle Verbindungen unterstützt.
+
+Builds:
+  - versionName: 1.1.1
+    versionCode: 3
+    commit: v1.1.1
+    subdir: android/app
+    sudo:
+      - apt-get update
+      - apt-get install -y openjdk-17-jdk-headless
+      - update-java-alternatives -a
+    gradle:
+      - fdroid
+    srclibs:
+      - reproducible-apk-tools@v0.2.8
+    prebuild: sed -i -e '/signingConfig/d' build.gradle.kts
+    scandelete:
+      - android/gradle/wrapper
+
+AutoUpdateMode: Version
+UpdateCheckMode: Tags
+CurrentVersion: 1.1.1
+CurrentVersionCode: 3

server/README.en.md

@@ -0,0 +1,86 @@
+# WebDAV Server - Simple Notes Sync
+
+**🌍 Languages:** [Deutsch](README.md) · **English**
+
+---
+
+## Quick Start
+
+```bash
+# 1. Adjust environment variables
+cp .env.example .env
+nano .env
+
+# 2. Start server
+docker-compose up -d
+
+# 3. Check logs
+docker-compose logs -f
+
+# 4. Test
+curl -u noteuser:your_password http://localhost:8080/
+```
+
+## Server URL
+
+**Local:** `http://localhost:8080/`
+
+**On network:** `http://YOUR_IP:8080/` (e.g. `http://192.168.1.100:8080/`)
+
+Find IP address:
+```bash
+ip addr show | grep "inet " | grep -v 127.0.0.1
+```
+
+## Credentials
+
+Default (see `.env`):
+- Username: `noteuser`
+- Password: See `.env` file
+
+## Management
+
+```bash
+# Check status
+docker-compose ps
+
+# View logs
+docker-compose logs -f
+
+# Restart
+docker-compose restart
+
+# Stop
+docker-compose down
+
+# Update
+docker-compose pull
+docker-compose up -d
+```
+
+## Data Location
+
+Your notes are stored in: `./data/`
+
+**Backup:**
+```bash
+# Create backup
+tar -czf notes-backup-$(date +%Y%m%d).tar.gz data/
+
+# Restore backup
+tar -xzf notes-backup-YYYYMMDD.tar.gz
+```
+
+## External Access (HTTPS)
+
+For access from outside your home network, use a reverse proxy like Caddy or nginx:
+
+**Example with Caddy:**
+
+```Caddyfile
+notes.yourdomain.com {
+    reverse_proxy localhost:8080
+}
+```
+
+**Important:** Always use HTTPS for external access to protect your credentials!

server/README.md

@@ -1,5 +1,9 @@
 # WebDAV Server - Simple Notes Sync
 
+**🌍 Sprachen:** **Deutsch** · [English](README.en.md)
+
+---
+
 ## Quick Start
 
 ```bash