UI refinements: Send button, server deletion detection, remove manual refresh

- Rename "Order" button to "Send" throughout UI
- Detect server-side document deletions (404) and auto-archive
- Remove manual refresh button (auto-refresh handles this)
- Fix password toggle button with preventDefault/stopPropagation
- Make auto-refresh silent (no status messages)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/utils/binect-api.ts

@@ -445,6 +445,10 @@ export async function getDocumentStatus(
     }
 
     if (error instanceof BinectApiError) {
+      // Check for 404 - document not found (deleted on server)
+      if (error.status === 404) {
+        throw new BinectAPIError('Document not found on server', 404);
+      }
       throw BinectAPIError.fromBinectError(error);
     }