Fix F-Droid bot feedback issues [skip ci]

- Move fastlane metadata to repository root (was in android/fastlane)
- Add distributionSha256Sum to gradle-wrapper.properties for security
- Update Gradle Wrapper JAR to match version 8.13
- Document NonFreeNet anti-feature (HTTP support for local WebDAV servers)

Addresses F-Droid RFP issue #3458 bot feedback

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

@@ -0,0 +1,20 @@
+🐛 Bugfixes v1.1.1
+
+✅ No more error notifications in foreign WiFi networks!
+- Server reachability check before each sync (2s timeout)
+- Silent abort when server is unreachable
+- 80% faster abort: 2s instead of 10+ seconds
+
+✅ No more errors when connecting to WiFi / arriving home!
+- Pre-check waits until network is ready (DHCP, routing, gateway)
+- No more errors during network initialization
+
+🔧 Notification improvements:
+- Old notifications are cleared on app start
+- Error notifications disappear automatically after 30 seconds
+- Better battery efficiency (no more long timeouts)
+
+📱 UI fixes:
+- Sync icon no longer shown when sync is not configured
+- Swipe-to-delete: No more flickering when quickly deleting multiple notes
+- After saving a note, you automatically land at the top of the list

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