webui: Allow pasting file from clipboard (#13526)

* server: Allow pasting file from clipboard

* server: Prevent default action on file paste

* update build

* format then build combined

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Co-authored-by: Xuan Son Nguyen <son@huggingface.co>

tools/server/webui/package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc -b && vite build",
+    "build": "npm run format && tsc -b && vite build",
     "format": "eslint . && prettier --write .",
     "lint": "eslint .",
     "preview": "vite preview"