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

tsconfig.node.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}