feat: setup full Next.js toolchain and core dependencies

- Add runtime deps: react-query, react-hook-form+zod, zustand, ky, openapi-fetch,
  better-auth, react-markdown, shiki, recharts, next-themes, nuqs, sonner, cmdk,
  vaul, embla-carousel-react, motion, date-fns, tailwind-merge, clsx, cva
- Add dev tooling: vitest, testing-library, playwright, prettier(+tailwind plugin),
  husky, lint-staged, jsdom
- Wire providers (QueryClient, Theme, NuqsAdapter, Tooltip, Sonner) into layout
- Add vitest/playwright/prettier configs + lint-staged pre-commit hook
- Add lib/query-client + lib/http (ky) helpers and sample unit test
- Fix react-hooks/set-state-in-effect lint errors (use-mobile useSyncExternalStore,
  carousel async init)
- Remove committed Next-generated types/ duplicates (regenerated under .next/types)

package.json

@@ -6,22 +6,83 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "eslint"
+    "lint": "eslint",
+    "lint:fix": "eslint --fix",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage",
+    "test:e2e": "playwright test",
+    "format": "prettier --write .",
+    "format:check": "prettier --check .",
+    "prepare": "husky"
+  },
+  "lint-staged": {
+    "*.{ts,tsx}": [
+      "eslint --fix",
+      "prettier --write"
+    ],
+    "*.{css,json,md}": [
+      "prettier --write"
+    ]
   },
   "dependencies": {
+    "@base-ui/react": "^1.8.0",
+    "@hookform/resolvers": "^5.9.1",
+    "@shadcn/react": "^0.3.1",
+    "@tanstack/react-query": "^5.103.1",
+    "@tanstack/react-table": "^9.2.4",
+    "better-auth": "^1.7.5",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "cmdk": "^1.1.1",
+    "cn": "^0.3.0",
+    "date-fns": "^4.4.0",
+    "embla-carousel-react": "^8.6.0",
+    "input-otp": "^1.5.0",
+    "ky": "^2.1.0",
+    "lucide-react": "^1.47.0",
+    "motion": "^13.4.0",
     "next": "16.3.5",
+    "next-themes": "^0.4.6",
+    "nuqs": "^2.10.1",
+    "openapi-fetch": "^0.17.0",
     "react": "19.2.8",
-    "react-dom": "19.2.8"
+    "react-day-picker": "^10.0.1",
+    "react-dom": "19.2.8",
+    "react-hook-form": "^7.88.0",
+    "react-markdown": "^10.1.0",
+    "react-resizable-panels": "^4.12.4",
+    "recharts": "^3.10.1",
+    "remark-gfm": "^4.0.1",
+    "shadcn": "^4.21.0",
+    "shiki": "^4.4.3",
+    "sonner": "^2.0.8",
+    "tailwind-merge": "^3.7.0",
+    "tw-animate-css": "^1.4.0",
+    "vaul": "^1.1.2",
+    "zod": "^4.6.5",
+    "zustand": "^5.0.15"
   },
   "devDependencies": {
+    "@playwright/test": "^1.63.0",
     "@tailwindcss/postcss": "^4",
+    "@testing-library/dom": "^10.4.2",
+    "@testing-library/jest-dom": "^7.0.1",
+    "@testing-library/react": "^16.3.3",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "eslint": "^9",
     "eslint-config-next": "16.3.5",
+    "husky": "^9.1.7",
+    "jsdom": "^30.1.0",
+    "lint-staged": "^17.5.1",
+    "prettier": "^3.9.8",
+    "prettier-plugin-tailwindcss": "^0.8.1",
     "tailwindcss": "^4",
-    "typescript": "^5"
+    "typescript": "^5",
+    "vitest": "^5.0.1"
   },
   "packageManager": "bun@1.3.14",
   "ignoreScripts": [