fix: Remove emojis from F-Droid changelogs and fix EOF delimiter

- Removed emojis (🆕 📚) from F-Droid changelogs (better compatibility)
- Changed EOF to CHANGELOG_EOF in workflow (prevents delimiter conflicts)

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

@@ -107,9 +107,9 @@ jobs:
           # Lese deutsche Changelog (Hauptsprache)
           if [ -f "fastlane/metadata/android/de-DE/changelogs/${{ env.BUILD_NUMBER }}.txt" ]; then
             {
-              echo 'CHANGELOG_DE<<EOF'
+              echo 'CHANGELOG_DE<<CHANGELOG_EOF'
               cat "fastlane/metadata/android/de-DE/changelogs/${{ env.BUILD_NUMBER }}.txt"
-              echo 'EOF'
+              echo 'CHANGELOG_EOF'
             } >> $GITHUB_ENV
           else
             echo "CHANGELOG_DE=Keine deutschen Release Notes verfügbar." >> $GITHUB_ENV
@@ -118,9 +118,9 @@ jobs:
           # Lese englische Changelog (optional)
           if [ -f "fastlane/metadata/android/en-US/changelogs/${{ env.BUILD_NUMBER }}.txt" ]; then
             {
-              echo 'CHANGELOG_EN<<EOF'
+              echo 'CHANGELOG_EN<<CHANGELOG_EOF'
               cat "fastlane/metadata/android/en-US/changelogs/${{ env.BUILD_NUMBER }}.txt"
-              echo 'EOF'
+              echo 'CHANGELOG_EOF'
             } >> $GITHUB_ENV
           else
             echo "CHANGELOG_EN=" >> $GITHUB_ENV

fastlane/metadata/android/de-DE/changelogs/5.txt

@@ -1,13 +1,13 @@
 v1.2.0 - Backup & Desktop-Integration
 
-🆕 Lokales Backup/Restore
+Lokales Backup/Restore
 • Exportiere alle Notizen als JSON
 • 3 Wiederherstellungs-Modi (Merge/Replace/Overwrite)
 • Auto-Backup vor Restore
 
-🆕 Markdown Desktop-Integration (optional)
+Markdown Desktop-Integration (optional)
 • .md Export für Desktop-Editoren (WebDAV-Mount)
 • Last-Write-Wins Sync
 • Manueller Import
 
-📚 Sync-Architektur Doku
+Sync-Architektur Doku

fastlane/metadata/android/en-US/changelogs/5.txt

@@ -1,13 +1,13 @@
 v1.2.0 - Backup & Desktop Integration
 
-🆕 Local Backup/Restore
+Local Backup/Restore
 • Export all notes as JSON
 • 3 restore modes (Merge/Replace/Overwrite)
 • Auto-backup before restore
 
-🆕 Markdown Desktop Integration (optional)
+Markdown Desktop Integration (optional)
 • .md export for desktop editors (WebDAV mount)
 • Last-Write-Wins sync
 • Manual import
 
-📚 Sync architecture docs
+Sync architecture docs