feat: add mobile-responsive layout and card views across all pages

- New useIsMobile hook and MobileCardList component
- AppLayout: hamburger menu + Drawer navigation on mobile
- All list pages (Inbox, Posteingang, Manuell, Mail, Freigabe, Zahlung, TaskLog)
  show card layout on mobile instead of tables
- CSS: responsive modal height, horizontal table scroll, text-size-adjust
- Backend: Agrarmonitor polling fixes, Zahlung service improvements,
  IMAP folder service extended, misc controller fixes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

paperless-backend/src/paperless/paperless-processor.service.ts

@@ -181,7 +181,7 @@ export class PaperlessProcessorService {
                 doc.correspondent !== null && doc.correspondent !== undefined;
               break;
             case 2:
-              isFilled = !!doc.created || !!doc.created_date;
+              isFilled = !!doc.created;
               break;
             case 3:
               isFilled =

paperless-backend/src/paperless/paperless.controller.ts

@@ -155,7 +155,7 @@ export class PaperlessController {
         asn: doc.archive_serial_number,
         documentType: doc.document_type,
         correspondent: doc.correspondent,
-        created: doc.created_date,
+        created: doc.created,
         added: doc.added,
         tags: doc.tags,
         customFields: doc.custom_fields,
@@ -179,7 +179,7 @@ export class PaperlessController {
         asn: doc.archive_serial_number,
         documentType: doc.document_type,
         correspondent: doc.correspondent,
-        created: doc.created_date,
+        created: doc.created,
         added: doc.added,
         tags: doc.tags,
         customFields: doc.custom_fields,
@@ -338,7 +338,7 @@ export class PaperlessController {
             docDate.getHours() * 60 * 60 * 1000,
         );
       }
-      oldDocument.created_date = docDate.toISOString().split('T')[0];
+      oldDocument.created = docDate.toISOString();
     }
 
     const cfDefinitions = await this.paperlessService.getCustomFields();
@@ -390,7 +390,7 @@ export class PaperlessController {
     for (const req of reqs) {
       let isFieldValid = false;
       if (req.Type === 1) isFieldValid = oldDocument.correspondent !== null;
-      if (req.Type === 2) isFieldValid = oldDocument.created_date !== null;
+      if (req.Type === 2) isFieldValid = oldDocument.created !== null;
       if (req.Type === 3)
         isFieldValid = oldDocument.archive_serial_number !== null;
       if (req.Type === 4)
@@ -446,10 +446,8 @@ export class PaperlessController {
             );
           }
         }
-        titleTemplate = titleTemplate.replace(
-          '{{DATE}}',
-          oldDocument.created_date,
-        );
+        const createdDatePart = String(oldDocument.created ?? '').split('T')[0];
+        titleTemplate = titleTemplate.replace('{{DATE}}', createdDatePart);
         oldDocument.title = titleTemplate;
       }
     } else {
@@ -471,6 +469,9 @@ export class PaperlessController {
       }
     }
 
+    // Veraltetes Feld nicht mit-PATCHen (löst Paperless-Deprecation-Warnung aus)
+    delete oldDocument.created_date;
+
     await this.paperlessService.updateDocument(documentId, oldDocument);
     return { success: true };
   }