Add message actions and grounded citation Sources (#97, #98)

Wire copy/thumbs/export on chat bubbles and render live + hydrated Sources from citations frames so users can rate, export, and inspect grounded answers.

llm-fe/package.json

@@ -20,16 +20,21 @@
     "@testing-library/user-event": "^14.5.2",
     "@types/jest": "^29.5.14",
     "@types/node": "^22.10.2",
+    "@types/papaparse": "^5.5.2",
+    "@types/pdfmake": "^0.3.3",
     "axios": "^1.13.2",
     "babel-loader": "^9.2.1",
     "bootstrap": "^5.3.3",
     "brace-expansion": "file:vendor/brace-expansion-compat",
     "chroma-js": "^3.1.2",
+    "docx": "^9.7.1",
     "formik": "^2.4.6",
     "jwt-decode": "^4.0.0",
     "lodash": "^4.17.21",
     "markdown-to-jsx": "^7.7.2",
     "mini.css": "^3.0.1",
+    "papaparse": "^5.5.4",
+    "pdfmake": "^0.3.11",
     "react-bootstrap": "^2.10.6",
     "react-code-blocks": "^0.1.6",
     "react-github-btn": "^1.4.0",
@@ -42,6 +47,7 @@
     "web-vitals": "^4.2.4",
     "webpack": "^5.97.1",
     "webpack-cli": "^5.1.4",
+    "xlsx": "^0.18.5",
     "yup": "^1.5.0"
   },
   "scripts": {
@@ -77,6 +83,7 @@
   },
   "devDependencies": {
     "@capacitor/assets": "^3.0.5",
+    "@testing-library/dom": "^10.4.1",
     "@types/bootstrap": "~5.2.10",
     "@types/lodash": "~4.17.13",
     "@types/react": "^18.3.16",