release: bump version to 1.4(p) (versionCode 14)

- Update versionCode 12 → 14, versionName 1.3(p) → 1.4(p)
- Update pubspec.yaml version to 1.4.0+14
- Add CHANGELOG.md with full version history
- Update README.md: version badge + changelog section
- Desktop Contribute Dashboard rebuilt to match web version
  - Contributor Dashboard title, 3-tab nav (Contribute/Leaderboard/Achievements)
  - Two-column submit form, tier milestone progress bar
  - Desktop leaderboard with podium, filters, rank table (green points)
  - Desktop achievements 3-column badge grid
  - Inline Reward Shop with RP balance
- Gamification feature module (EP, RP, leaderboard, achievements, shop)
- Profile screen redesigned to match web app layout with animations
- Home screen bottom sheet date filter chips
- Updated API endpoints, login/event detail screens, theme colors
- Added Gilroy font suite, responsive layout improvements

pubspec.yaml

@@ -1,7 +1,7 @@
 name: figma
 description: A Flutter event app
 publish_to: 'none'
-version: 1.0.0+1
+version: 1.4.0+14
 
 environment:
   sdk: ">=2.17.0 <3.0.0"
@@ -19,7 +19,9 @@ dependencies:
   google_maps_flutter: ^2.5.0
   url_launcher: ^6.2.1
   share_plus: ^7.2.1
+  provider: ^6.1.2
   video_player: ^2.8.1
+  cached_network_image: ^3.3.1
 
 dev_dependencies:
   flutter_test: