Fix stale editedOcrText reference in handleDownload dependency array

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

frontend/src/App.jsx

@@ -179,7 +179,7 @@ function App() {
     a.download = `deepseek-ocr-result.${ext}`
     a.click()
     URL.revokeObjectURL(url)
-  }, [editedOcrText, result, mode])
+  }, [activeResultMode, editedResults, result, mode])
 
   const metaField = (key) => (e) => setMetadata(m => ({ ...m, [key]: e.target.value }))