fixed stale state after logout and replayed or lost share intents

lib/view/login/login_controller.dart

@@ -11,6 +11,7 @@ import '../../api/marianumconnect/auth/token_storage.dart';
 import '../../api/marianumconnect/queries/auth_login/auth_login.dart';
 import '../../api/marianumconnect/queries/auth_logout/auth_logout.dart';
 import '../../model/account_data.dart';
+import '../../model/session_wipe.dart';
 import '../../widget_data/widget_sync.dart';
 
 /// Outcome of a login attempt.
@@ -46,6 +47,10 @@ class LoginController extends ChangeNotifier {
     _errorDetails = null;
     notifyListeners();
 
+    // The previous account's wipe runs deferred; racing it would let it
+    // clear what this login stores (widget job, caches).
+    await SessionWipe.done;
+
     final user = username.trim().toLowerCase();
 
     // Demo login: the prefix enters local demo mode, password ignored, no

lib/view/pages/files/files_upload_dialog.dart

@@ -53,15 +53,6 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
     }).toList();
   }
 
-  void showHttpErrorCode(int httpErrorCode) {
-    InfoDialog.show(
-      context,
-      'Error code: $httpErrorCode',
-      title: 'Ein Fehler ist aufgetreten',
-      copyable: true,
-    );
-  }
-
   void _resetProgress() {
     _isUploading = false;
     _overallProgressValue = 0.0;
@@ -221,14 +212,17 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
         return;
       }
 
+      if (!mounted) return;
+      // Stay on the dialog: popping here reported the partial result as a
+      // success to onUploadFinished and closed the error dialog right away.
       if (uploadTask.statusCode < 200 || uploadTask.statusCode > 299) {
-        setState(_resetProgress);
-        if (!mounted) return;
-        Navigator.of(context).pop();
-        showHttpErrorCode(uploadTask.statusCode);
-      } else {
-        uploadetFilePaths.add(fullRemotePath);
+        _showUploadError(
+          'Upload fehlgeschlagen für "$fileName" '
+          '(Fehlercode ${uploadTask.statusCode}).',
+        );
+        return;
       }
+      uploadetFilePaths.add(fullRemotePath);
     }
 
     setState(_resetProgress);

lib/view/pages/share_intent/share_chat_picker.dart

@@ -135,19 +135,24 @@ Future<void> _externalShareFlow(
   PendingShare share,
 ) async {
   if (share.hasFiles) {
-    await ensureTalkShareFolder();
-    if (!context.mounted) return;
-    await pushScreen(
-      context,
-      withNavBar: false,
-      screen: FilesUploadDialog(
-        filePaths: share.filePaths,
-        remotePath: talkShareFolder,
-        uniqueNames: true,
-        onUploadFinished: (uploaded) =>
-            _afterExternalFilesUploaded(context, room, uploaded, share),
-      ),
-    );
+    ShareIntentListener.instance.beginFlow();
+    try {
+      await ensureTalkShareFolder();
+      if (!context.mounted) return;
+      await pushScreen(
+        context,
+        withNavBar: false,
+        screen: FilesUploadDialog(
+          filePaths: share.filePaths,
+          remotePath: talkShareFolder,
+          uniqueNames: true,
+          onUploadFinished: (uploaded) =>
+              _afterExternalFilesUploaded(context, room, uploaded, share),
+        ),
+      );
+    } finally {
+      ShareIntentListener.instance.endFlow();
+    }
     return;
   }
   if (share.hasText) {
@@ -155,17 +160,28 @@ Future<void> _externalShareFlow(
   }
 }
 
+// Called synchronously when the upload dialog pops, so the flow is entered
+// before the upload step above releases it.
 Future<void> _afterExternalFilesUploaded(
   BuildContext context,
   GetRoomResponseObject room,
   List<String> uploadedRemotePaths,
   PendingShare share,
-) => _runShareFlow(
-  context,
-  action: () =>
-      shareFilesToChat(token: room.token, remoteFilePaths: uploadedRemotePaths),
-  onSuccess: () => _setExternalDraftAndOpenChat(context, room, share),
-);
+) async {
+  ShareIntentListener.instance.beginFlow();
+  try {
+    await _runShareFlow(
+      context,
+      action: () => shareFilesToChat(
+        token: room.token,
+        remoteFilePaths: uploadedRemotePaths,
+      ),
+      onSuccess: () => _setExternalDraftAndOpenChat(context, room, share),
+    );
+  } finally {
+    ShareIntentListener.instance.endFlow();
+  }
+}
 
 /// Shared share-flow scaffolding: shows the blocking spinner, runs [action],
 /// maps failures to an error dialog (popping the spinner first), and invokes

lib/view/pages/share_intent/share_folder_picker.dart

@@ -206,16 +206,21 @@ Future<void> _externalUploadFlow(
   List<String> targetPath,
   PendingShare share,
 ) async {
-  await pushScreen(
-    context,
-    withNavBar: false,
-    screen: FilesUploadDialog(
-      filePaths: share.filePaths,
-      remotePath: targetPath.join('/'),
-      onUploadFinished: (_) =>
-          _afterExternalUploaded(context, targetPath, share),
-    ),
-  );
+  ShareIntentListener.instance.beginFlow();
+  try {
+    await pushScreen(
+      context,
+      withNavBar: false,
+      screen: FilesUploadDialog(
+        filePaths: share.filePaths,
+        remotePath: targetPath.join('/'),
+        onUploadFinished: (_) =>
+            _afterExternalUploaded(context, targetPath, share),
+      ),
+    );
+  } finally {
+    ShareIntentListener.instance.endFlow();
+  }
 }
 
 void _afterExternalUploaded(