perf(panel): speed up file browsing and preserve loading forms

panel/package.json

@@ -16,12 +16,18 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@codemirror/language": "^6.12.4",
+    "@codemirror/legacy-modes": "^6.5.4",
+    "@codemirror/state": "^6.7.6",
+    "@codemirror/view": "^6.43.13",
+    "@lezer/highlight": "^1.2.4",
     "@radix-ui/react-dialog": "^1.1.6",
     "@radix-ui/react-label": "^2.1.2",
     "@radix-ui/react-select": "^2.1.6",
     "@radix-ui/react-slot": "^1.1.2",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "codemirror": "^6.0.2",
     "i18next": "^26.3.3",
     "i18next-browser-languagedetector": "^8.2.1",
     "lucide-react": "^0.469.0",