Remove unused dependencies and dead code, refresh AGENTS.md

- Drop unused email module and media text extraction path
- Remove 12 unused dependencies
- Remove unused imports in server.ts
- Add typecheck and test scripts
- Rewrite AGENTS.md to describe this project

Co-Authored-By: Claude Opus 5.5 <[email protected]>

package.json

@@ -9,20 +9,19 @@
         "build": "bunx bunext build",
         "db:schema": "bunx bun-sqlite schema -t",
         "db:admin": "bunx bun-sqlite admin",
-        "start": "NODE_ENV=production bun src/server.ts"
+        "start": "NODE_ENV=production bun src/server.ts",
+        "typecheck": "bunx tsc --noEmit",
+        "test": "bun test"
     },
     "devDependencies": {
-        "@next/mdx": "^16.3.0",
         "@types/ace": "^0.0.52",
         "@types/bun": "latest",
         "@types/lodash": "^4.17.25",
         "@types/mdx": "^2.0.14",
         "@types/node": "^26.2.0",
-        "@types/nodemailer": "^8.0.1",
         "@types/qrcode": "^1.5.6",
         "@types/react": "^19.2.18",
         "@types/react-dom": "^19.2.4",
-        "@types/turndown": "^5.0.6",
         "ace-builds": "^1.44.0",
         "tailwindcss": "^4.3.3"
     },
@@ -32,28 +31,19 @@
     "dependencies": {
         "@moduletrace/bun-sqlite": "^1.2.0",
         "@moduletrace/bunext": "^1.2.4",
-        "gray-matter": "^4.0.3",
         "html-to-react": "^1.7.0",
         "lodash": "^4.18.1",
         "lucide-react": "^1.31.0",
-        "mammoth": "^1.12.1",
         "mdx": "^0.3.1",
         "next-mdx-remote": "^6.0.0",
-        "nodemailer": "^9.0.5",
-        "onnxruntime-node": "^1.27.0",
         "openai": "^7.4.0",
         "qrcode": "^1.5.4",
-        "react-code-blocks": "^0.1.6",
         "react-markdown": "^10.1.0",
-        "react-responsive-modal": "^7.2.0",
         "rehype-prism-plus": "^2.0.2",
         "remark-gfm": "^4.0.1",
         "sharp": "^0.35.3",
         "tailwind-merge": "^3.6.0",
-        "turndown": "^7.2.4",
-        "unpdf": "^1.8.0",
-        "uuid": "^14.0.2",
-        "xlsx": "^0.18.5"
+        "uuid": "^14.0.2"
     },
     "repository": {
         "url": "https://git.tben.me/Moduletrace/wireguard-ui"