bun + update

.github/workflows/ci.yml

@@ -12,35 +12,33 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
         with:
-          node-version: '25'
-          cache: 'npm'
-          cache-dependency-path: frontend/package-lock.json
+          bun-version: '1.3'
 
       - name: Install Dependencies
-        run: npm install
+        run: bun install --frozen-lockfile
         working-directory: frontend
 
       - name: Typecheck
-        run: npm run typecheck
+        run: bun run typecheck
         working-directory: frontend
 
       - name: Lint
-        run: npm run lint
+        run: bun run lint
         working-directory: frontend
 
       - name: Format Check
-        run: npm run format:check
+        run: bun run format:check
         working-directory: frontend
 
       - name: Test
-        run: npm test -- --run
+        run: bun run test
         working-directory: frontend
 
       - name: Build
-        run: npm run build
+        run: bun run build
         working-directory: frontend
 
   backend-check: