refactored HTTP error handling and streamlined UI components by centralizing shared logic and removing redundant parameters

lib/view/pages/settings/chat_background_settings_page.dart

@@ -86,20 +86,11 @@ class ChatBackgroundSettingsPage extends StatelessWidget {
                   trailing: DropdownButton<ChatBackgroundType>(
                     value: s.type,
                     icon: const Icon(Icons.arrow_drop_down),
-                    items: ChatBackgroundType.values
-                        .map(
-                          (e) => DropdownMenuItem<ChatBackgroundType>(
-                            value: e,
-                            child: Row(
-                              children: [
-                                Icon(_typeIcon(e)),
-                                const SizedBox(width: 10),
-                                Text(_typeLabel(e)),
-                              ],
-                            ),
-                          ),
-                        )
-                        .toList(),
+                    items: _iconDropdownItems(
+                      ChatBackgroundType.values,
+                      _typeIcon,
+                      _typeLabel,
+                    ),
                     onChanged: (e) => _onTypeChanged(context, settings, e!),
                   ),
                 ),
@@ -142,20 +133,11 @@ class ChatBackgroundSettingsPage extends StatelessWidget {
                     trailing: DropdownButton<ChatBackgroundFit>(
                       value: s.fit,
                       icon: const Icon(Icons.arrow_drop_down),
-                      items: ChatBackgroundFit.values
-                          .map(
-                            (e) => DropdownMenuItem<ChatBackgroundFit>(
-                              value: e,
-                              child: Row(
-                                children: [
-                                  Icon(_fitIcon(e)),
-                                  const SizedBox(width: 10),
-                                  Text(_fitLabel(e)),
-                                ],
-                              ),
-                            ),
-                          )
-                          .toList(),
+                      items: _iconDropdownItems(
+                        ChatBackgroundFit.values,
+                        _fitIcon,
+                        _fitLabel,
+                      ),
                       onChanged: (e) {
                         Haptics.selection();
                         settings.val(write: true).chatBackgroundSettings.fit =
@@ -280,6 +262,27 @@ class ChatBackgroundSettingsPage extends StatelessWidget {
     cs.type = ChatBackgroundType.color;
   }
 
+  /// Dropdown menu items rendered as an icon + label row, shared by the source
+  /// and fill-mode pickers.
+  static List<DropdownMenuItem<T>> _iconDropdownItems<T>(
+    List<T> values,
+    IconData Function(T) icon,
+    String Function(T) label,
+  ) => values
+      .map(
+        (e) => DropdownMenuItem<T>(
+          value: e,
+          child: Row(
+            children: [
+              Icon(icon(e)),
+              const SizedBox(width: 10),
+              Text(label(e)),
+            ],
+          ),
+        ),
+      )
+      .toList();
+
   IconData _typeIcon(ChatBackgroundType type) => switch (type) {
     ChatBackgroundType.pattern => Icons.texture_outlined,
     ChatBackgroundType.image => Icons.image_outlined,
@@ -330,7 +333,6 @@ class _Preview extends StatelessWidget {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 _bubble(
-                  context,
                   alignment: Alignment.centerLeft,
                   color: remoteColor,
                   text: 'Wie gefällt dir der neue Hintergrund?',
@@ -338,7 +340,6 @@ class _Preview extends StatelessWidget {
                 ),
                 const SizedBox(height: 8),
                 _bubble(
-                  context,
                   alignment: Alignment.centerRight,
                   color: selfColor,
                   text: 'Sieht richtig gut aus! 🎉',
@@ -352,8 +353,7 @@ class _Preview extends StatelessWidget {
     );
   }
 
-  Widget _bubble(
-    BuildContext context, {
+  Widget _bubble({
     required Alignment alignment,
     required Color color,
     required String text,