Refactor: Introduce FullScreenContainedLoader and use rememberUpdatedState

This commit introduces `FullScreenContainedLoader` and replaces usages of `FullScreenLoader` where appropriate.

It also updates several composables to use `rememberUpdatedState` for lambda parameters to ensure the latest versions are used.

Additionally, the following changes are included:
- Add a setting to show/hide the attachment button in the chat input bar.
- Implement navigation to `PhotoViewScreen` when a photo attachment is clicked in a message.
- Add "Copy link" and "Copy image" actions to `PhotoViewScreen`.
- Remove unused settings and their corresponding logic from `SettingsViewModel` and `UserSettings`.

feature/settings/src/main/kotlin/dev/meloda/fast/settings/SettingsViewModel.kt

@@ -201,24 +201,12 @@ class SettingsViewModelImpl(
                 userSettings.onAppLanguageChanged(newLanguage)
             }
 
-
-            SettingsKeys.DEFAULT_VALUE_FEATURES_FAST_TEXT -> {
-                val newText = newValue as? String ?: SettingsKeys.DEFAULT_VALUE_FEATURES_FAST_TEXT
-                userSettings.onFastTextChanged(newText)
-            }
-
-
             SettingsKeys.KEY_ACTIVITY_SEND_ONLINE_STATUS -> {
                 val isUsing = newValue as? Boolean
                     ?: SettingsKeys.DEFAULT_VALUE_KEY_ACTIVITY_SEND_ONLINE_STATUS
                 userSettings.onSendOnlineStatusChanged(isUsing)
             }
 
-            SettingsKeys.KEY_DEBUG_SHOW_CRASH_ALERT -> {
-                val show = newValue as? Boolean ?: SettingsKeys.DEFAULT_VALUE_KEY_SHOW_EMOJI_BUTTON
-                userSettings.onShowAlertAfterCrashChanged(show)
-            }
-
             SettingsKeys.KEY_LONG_POLL_IN_BACKGROUND -> {
                 val inBackground = newValue as? Boolean
                     ?: SettingsKeys.DEFAULT_LONG_POLL_IN_BACKGROUND
@@ -240,17 +228,6 @@ class SettingsViewModelImpl(
                 userSettings.onUseBlurChanged(isUsing)
             }
 
-            SettingsKeys.KEY_SHOW_EMOJI_BUTTON -> {
-                val show = newValue as? Boolean ?: SettingsKeys.DEFAULT_VALUE_KEY_SHOW_EMOJI_BUTTON
-                userSettings.onShowEmojiButtonChanged(show)
-            }
-
-            SettingsKeys.KEY_SHOW_TIME_IN_ACTION_MESSAGES -> {
-                val show = newValue as? Boolean
-                    ?: SettingsKeys.DEFAULT_SHOW_TIME_IN_ACTION_MESSAGES
-                userSettings.onShowTimeInActionMessagesChanged(show)
-            }
-
             SettingsKeys.KEY_USE_SYSTEM_FONT -> {
                 val use = newValue as? Boolean ?: SettingsKeys.DEFAULT_USE_SYSTEM_FONT
                 userSettings.onUseSystemFontChanged(use)
@@ -302,6 +279,12 @@ class SettingsViewModelImpl(
             text = UiText.Resource(UiR.string.settings_general_show_emoji_button_summary),
             defaultValue = SettingsKeys.DEFAULT_VALUE_KEY_SHOW_EMOJI_BUTTON
         )
+        val generalShowAttachmentButton = SettingsItem.Switch(
+            key = SettingsKeys.KEY_SHOW_ATTACHMENT_BUTTON,
+            title = UiText.Resource(UiR.string.settings_general_show_attachment_button_title),
+            text = UiText.Resource(UiR.string.settings_general_show_attachment_button_summary),
+            defaultValue = SettingsKeys.DEFAULT_VALUE_SHOW_ATTACHMENT_BUTTON
+        )
         val generalEnableHaptic = SettingsItem.Switch(
             key = SettingsKeys.KEY_ENABLE_HAPTIC,
             defaultValue = SettingsKeys.DEFAULT_ENABLE_HAPTIC,
@@ -476,6 +459,7 @@ class SettingsViewModelImpl(
             generalTitle,
             generalUseContactNames,
             generalShowEmojiButton,
+            generalShowAttachmentButton,
             generalEnableHaptic
         )
         val appearanceList = listOf(