feat: nKode React + TypeScript SPA scaffold

- React + Vite + Tailwind CSS v4 + React Router
- Keypad component: 10-digit pad with dot indicators, keyboard support, haptic feel
- Auth pages: Login (email → keypad), Signup (email → method → keypad/key)
- Home page: session info, practice keypad
- Admin dashboard: placeholder stats + user management
- Developer dashboard: OIDC client registration UI placeholder
- WASM client wrapper: lazy loads from /wasm/, falls back to mock client
- TypeScript type declarations for nkode-client-wasm package
- Dark mode with system preference detection
- Auth state management with localStorage persistence + auto-expiry
- Code splitting: lazy-loaded route pages (~236KB main bundle)
- Inter font, clean indigo/slate design system

package.json

@@ -0,0 +1,33 @@
+{
+  "name": "nkode-web",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "@tailwindcss/vite": "^4.1.18",
+    "@types/node": "^24.10.1",
+    "@types/react": "^19.2.5",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.1",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "react-router-dom": "^7.13.0",
+    "tailwindcss": "^4.1.18",
+    "typescript": "~5.9.3",
+    "typescript-eslint": "^8.46.4",
+    "vite": "^7.2.4"
+  }
+}