Update icons, screenshots, and UX improvements

- Refactor icon picker to use full Ionicons set dynamically
- Add date sort toggle to My Answers screen
- Fix match deduplication and show total count on home
- Clear stale data when switching chats
- Update app store screenshots
- Bump build number to 25

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/mobile/ios/Sauci/Info.plist

@@ -47,7 +47,7 @@
       </dict>
     </array>
     <key>CFBundleVersion</key>
-    <string>20</string>
+    <string>25</string>
     <key>LSMinimumSystemVersion</key>
     <string>12.0</string>
     <key>LSRequiresIPhoneOS</key>
@@ -60,7 +60,7 @@
       <true/>
     </dict>
     <key>NSCameraUsageDescription</key>
-    <string>Sauci uses your camera to take photos and videos that you can share privately with your partner in encrypted chat messages.</string>
+    <string>Sauci uses your camera to take photos and videos that you can share privately with your partner.</string>
     <key>NSFaceIDUsageDescription</key>
     <string>Sauci uses Face ID to unlock the app and keep your conversations private.</string>
     <key>NSMicrophoneUsageDescription</key>
@@ -68,7 +68,7 @@
     <key>NSPhotoLibraryAddUsageDescription</key>
     <string>Sauci saves photos and videos from your partner's messages to your photo library when you tap the save button.</string>
     <key>NSPhotoLibraryUsageDescription</key>
-    <string>Sauci uses your photo library so you can select photos and videos to share privately with your partner in encrypted chat messages.</string>
+    <string>Sauci uses your photo library so you can select photos and videos to share privately with your partner.</string>
     <key>NSUserActivityTypes</key>
     <array>
       <string>$(PRODUCT_BUNDLE_IDENTIFIER).expo.index_route</string>