feat: update version to 1.1.2 and enhance search, group info, UI and media features

Search Screen:
- Complete Search screen with 4 tabs: Chats, Media, Downloads, Files
- Media grid with real image loading from AttachmentFileManager + CDN fallback
- Fullscreen image viewer with swipe navigation from Media tab
- Downloads tab showing files from rosetta_downloads directory
- Files tab showing file attachments from all chats
- Links tab with URL extraction from messages

Group Features:
- Group invite cards redesigned inside chat bubbles with action button
- In-memory cache for group invite info (no loading on re-enter)
- Group members caching with TTL for faster group info loading
- Encryption key screen redesigned (Telegram-style 12x12 identicon)
- Fixed group members online status using PacketOnlineSubscribe/PacketOnlineState
- Emoji picker integration in GroupSetupScreen with proper keyboard handling

Chat & UI:
- Improved message delivery status handling and indicators
- Enhanced camera handling and UI state management
- File download manager with progress tracking
- Download indicator component
- File opening support in OtherProfileScreen (local, downloaded, blob)
- SwipeBack container improvements
- Theme screen and wallpaper selection enhancements
- FAB positioning fixes for keyboard/emoji panel in GroupSetupScreen

app/build.gradle.kts

@@ -23,8 +23,8 @@ val gitShortSha = safeGitOutput("rev-parse", "--short", "HEAD") ?: "unknown"
 // ═══════════════════════════════════════════════════════════
 // Rosetta versioning — bump here on each release
 // ═══════════════════════════════════════════════════════════
-val rosettaVersionName = "1.1.1"
-val rosettaVersionCode = 13  // Increment on each release
+val rosettaVersionName = "1.1.2"
+val rosettaVersionCode = 14  // Increment on each release
 
 android {
     namespace = "com.rosetta.messenger"