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/vault/VaultEditor.tsx

@@ -18,6 +18,8 @@ interface VaultEditorProps {
   localError: string;
   downloadingAttachmentKey: string;
   attachmentDownloadPercent: number | null;
+  uploadingAttachmentName: string;
+  attachmentUploadPercent: number | null;
   onUpdateDraft: (patch: Partial<VaultDraft>) => void;
   onSeedSshDefaults: (force?: boolean) => void;
   onUpdateSshPublicKey: (value: string) => void;
@@ -42,6 +44,13 @@ export default function VaultEditor(props: VaultEditorProps) {
       ? t('txt_downloading')
       : t('txt_downloading_percent', { percent: props.attachmentDownloadPercent });
   };
+  const uploadLabel =
+    props.attachmentUploadPercent == null
+      ? t('txt_uploading_attachment_named', { name: props.uploadingAttachmentName || t('txt_attachment') })
+      : t('txt_uploading_attachment_named_percent', {
+          name: props.uploadingAttachmentName || t('txt_attachment'),
+          percent: props.attachmentUploadPercent,
+        });
 
   return (
     <>
@@ -220,6 +229,7 @@ export default function VaultEditor(props: VaultEditorProps) {
             <Plus size={14} className="btn-icon" />
           </button>
         </div>
+        {!!props.uploadingAttachmentName && <div className="detail-sub">{uploadLabel}</div>}
         {!props.isCreating && props.selectedCipher && props.editExistingAttachments.length > 0 && (
           <div className="attachment-list">
             {props.editExistingAttachments.map((attachment) => {