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/email/email-import.service.ts

@@ -648,11 +648,17 @@ export class EmailImportService {
           this.logger.log(
             `Email ${firstAtt.EmailMessageId} als verarbeitet markiert.`,
           );
-          const emailEntity = await this.emailRepo.findOne({ where: { Id: firstAtt.EmailMessageId } });
+          const emailEntity = await this.emailRepo.findOne({
+            where: { Id: firstAtt.EmailMessageId },
+          });
           if (emailEntity) {
-            this.imapFolderService.moveToImportiert(emailEntity.MessageId).catch(err =>
-              this.logger.error('IMAP-Verschieben fehlgeschlagen: ' + err.message),
-            );
+            this.imapFolderService
+              .moveToImportiert(emailEntity.MessageId)
+              .catch((err) =>
+                this.logger.error(
+                  'IMAP-Verschieben fehlgeschlagen: ' + err.message,
+                ),
+              );
           }
         }
       }