feat: implement direct file upload for sends with JWT token validation

- Added `processSendFileUpload` function to handle file uploads for sends.
- Integrated JWT token creation and verification for secure file uploads.
- Updated `handleCreateFileSendV2` and `handleGetSendFileUpload` to use new upload URL generation.
- Refactored upload handling in `handleUploadSendFile` and `handlePublicUploadSendFile` to utilize the new upload process.
- Introduced `uploadDirectEncryptedPayload` for handling direct uploads with progress tracking.
- Enhanced API routes to support both POST and PUT methods for attachment uploads.
- Added localization strings for upload progress messages.
- Created utility functions for direct upload URL building and payload parsing.

webapp/src/components/AdminPage.tsx

@@ -11,7 +11,7 @@ interface AdminPageProps {
   onRefresh: () => void;
   onCreateInvite: (hours: number) => Promise<void>;
   onDeleteAllInvites: () => Promise<void>;
-  onToggleUserStatus: (userId: string, currentStatus: string) => Promise<void>;
+  onToggleUserStatus: (userId: string, currentStatus: 'active' | 'banned') => Promise<void>;
   onDeleteUser: (userId: string) => Promise<void>;
   onRevokeInvite: (code: string) => Promise<void>;
 }