Refactor image blurring to use RenderScript for improved performance and quality

- Replaced custom fast blur implementation with RenderScript-based Gaussian blur in BlurredAvatarBackground and AppearanceScreen.
- Updated image processing logic to scale down bitmaps before applying blur for efficiency.
- Simplified blur logic by removing unnecessary pixel manipulation methods.
- Enhanced media preview handling in OtherProfileScreen to utilize new Gaussian blur function.
- Improved code readability and maintainability by consolidating blur functionality.

app/src/main/java/com/rosetta/messenger/database/RosettaDatabase.kt

@@ -15,8 +15,9 @@ import androidx.sqlite.db.SupportSQLiteDatabase
                         DialogEntity::class,
                         BlacklistEntity::class,
                         AvatarCacheEntity::class,
-                        AccountSyncTimeEntity::class],
-        version = 12,
+                        AccountSyncTimeEntity::class,
+                        PinnedMessageEntity::class],
+        version = 13,
         exportSchema = false
 )
 abstract class RosettaDatabase : RoomDatabase() {
@@ -26,6 +27,7 @@ abstract class RosettaDatabase : RoomDatabase() {
     abstract fun blacklistDao(): BlacklistDao
     abstract fun avatarDao(): AvatarDao
     abstract fun syncTimeDao(): SyncTimeDao
+    abstract fun pinnedMessageDao(): PinnedMessageDao
 
     companion object {
         @Volatile private var INSTANCE: RosettaDatabase? = null
@@ -148,6 +150,32 @@ abstract class RosettaDatabase : RoomDatabase() {
                     }
                 }
 
+        /**
+         * 📌 МИГРАЦИЯ 12->13: Таблица pinned_messages для закреплённых сообщений (Telegram-style)
+         */
+        private val MIGRATION_12_13 =
+                object : Migration(12, 13) {
+                    override fun migrate(database: SupportSQLiteDatabase) {
+                        database.execSQL(
+                                """
+                    CREATE TABLE IF NOT EXISTS pinned_messages (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                        account TEXT NOT NULL,
+                        dialog_key TEXT NOT NULL,
+                        message_id TEXT NOT NULL,
+                        pinned_at INTEGER NOT NULL
+                    )
+                """
+                        )
+                        database.execSQL(
+                                "CREATE UNIQUE INDEX IF NOT EXISTS index_pinned_messages_account_dialog_key_message_id ON pinned_messages (account, dialog_key, message_id)"
+                        )
+                        database.execSQL(
+                                "CREATE INDEX IF NOT EXISTS index_pinned_messages_account_dialog_key_pinned_at ON pinned_messages (account, dialog_key, pinned_at)"
+                        )
+                    }
+                }
+
         fun getDatabase(context: Context): RosettaDatabase {
             return INSTANCE
                     ?: synchronized(this) {
@@ -168,7 +196,8 @@ abstract class RosettaDatabase : RoomDatabase() {
                                                 MIGRATION_8_9,
                                                 MIGRATION_9_10,
                                                 MIGRATION_10_11,
-                                                MIGRATION_11_12
+                                                MIGRATION_11_12,
+                                                MIGRATION_12_13
                                         )
                                         .fallbackToDestructiveMigration() // Для разработки - только
                                         // если миграция не