feat: simplify color handling in ChatsListScreen and improve gesture callbacks in SwipeableDialogItem

app/src/main/java/com/rosetta/messenger/data/AccountManager.kt

@@ -118,6 +118,32 @@ class AccountManager(private val context: Context) {
         saveAccount(updatedAccount)
     }
     
+    /**
+     * Delete account completely - remove from accounts list and clear login state
+     */
+    suspend fun deleteAccount(publicKey: String) {
+        context.accountDataStore.edit { preferences ->
+            // Remove from accounts list
+            val existingJson = preferences[ACCOUNTS_JSON]
+            if (existingJson != null) {
+                val accounts = parseAccounts(existingJson).toMutableList()
+                accounts.removeAll { it.publicKey == publicKey }
+                preferences[ACCOUNTS_JSON] = serializeAccounts(accounts)
+            }
+            // Clear current login if this was the active account
+            val currentKey = preferences[CURRENT_PUBLIC_KEY]
+            if (currentKey == publicKey) {
+                preferences[IS_LOGGED_IN] = false
+                preferences.remove(CURRENT_PUBLIC_KEY)
+            }
+        }
+        // Clear SharedPreferences if this was the last logged account
+        val lastLogged = sharedPrefs.getString(KEY_LAST_LOGGED, null)
+        if (lastLogged == publicKey) {
+            sharedPrefs.edit().remove(KEY_LAST_LOGGED).commit()
+        }
+    }
+
     suspend fun clearAll() {
         context.accountDataStore.edit { it.clear() }
     }