Fix profile avatar and display name issues

- Increase Dio receiveTimeout to 120s for file uploads
- Reduce WebDAV client timeout to 30s
- Add cache-busting v parameter to avatar URLs
- Add hasChanges logic to disable Save button when no changes made

b0esche_cloud/lib/services/api_client.dart

@@ -15,7 +15,7 @@ class ApiClient {
         baseUrl: baseUrl,
         connectTimeout: const Duration(seconds: 10),
         receiveTimeout: const Duration(
-          seconds: 60,
+          seconds: 120,
         ), // Increased for file uploads and org operations
       ),
     );

b0esche_cloud/lib/widgets/account_settings_dialog.dart

@@ -27,6 +27,7 @@ class _AccountSettingsDialogState extends State<AccountSettingsDialog> {
 
   // Profile fields
   late TextEditingController _displayNameController;
+  bool _hasChanges = false;
   String? _avatarUrl;
 
   // Security fields
@@ -55,6 +56,14 @@ class _AccountSettingsDialogState extends State<AccountSettingsDialog> {
         }
       }
     });
+
+    // Listen for changes in display name
+    _displayNameController.addListener(() {
+      final newHasChanges = _displayNameController.text != (_currentUser?.displayName ?? '');
+      if (_hasChanges != newHasChanges) {
+        setState(() => _hasChanges = newHasChanges);
+      }
+    });
   }
 
   @override
@@ -168,6 +177,8 @@ class _AccountSettingsDialogState extends State<AccountSettingsDialog> {
           const SnackBar(content: Text('Profile updated successfully')),
         );
 
+        setState(() => _hasChanges = false);
+
         // Close the dialog
         Navigator.of(context).pop();
       }
@@ -640,7 +651,7 @@ class _AccountSettingsDialogState extends State<AccountSettingsDialog> {
                 child: SizedBox(
                   width: 144,
                   child: ModernGlassButton(
-                    onPressed: _isLoading ? () {} : () => _updateProfile(),
+                    onPressed: _isLoading || !_hasChanges ? null : () => _updateProfile(),
                     isLoading: _isLoading,
                     child: _isLoading
                         ? const SizedBox(

go_cloud/internal/http/routes.go

@@ -3848,7 +3848,7 @@ func getUserProfileHandler(w http.ResponseWriter, r *http.Request, db *database.
 
 	// If avatar exists, return the backend URL instead of the internal WebDAV URL
 	if user.AvatarURL != nil && *user.AvatarURL != "" {
-		user.AvatarURL = &[]string{"/user/avatar"}[0]
+		user.AvatarURL = &[]string{fmt.Sprintf("/user/avatar?v=%d", time.Now().Unix())}[0]
 	}
 
 	w.Header().Set("Content-Type", "application/json")
@@ -4048,7 +4048,7 @@ func uploadUserAvatarHandler(w http.ResponseWriter, r *http.Request, db *databas
 
 	// Get public URL - for now, construct it manually since Nextcloud doesn't provide direct public URLs
 	// In a real setup, you'd configure Nextcloud to serve public URLs or use a CDN
-	publicURL := "/user/avatar"
+	publicURL := fmt.Sprintf("/user/avatar?v=%d", time.Now().Unix())
 	webdavURL := fmt.Sprintf("%s/%s", client.BaseURL, avatarPath)
 
 	// Update user profile with avatar URL

go_cloud/internal/storage/webdav.go

@@ -42,7 +42,7 @@ func NewWebDAVClient(cfg *config.Config) *WebDAVClient {
 		user:       cfg.NextcloudUser,
 		pass:       cfg.NextcloudPass,
 		basePrefix: strings.TrimRight(base, "/"),
-		httpClient: &http.Client{Timeout: 120 * time.Second},
+		httpClient: &http.Client{Timeout: 30 * time.Second},
 	}
 }