fix: minor changes

.github/workflows/CI.yaml

@@ -2,16 +2,16 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 env:
   CARGO_TERM_COLOR: always
 
 defaults:
   run:
-    working-directory: contracts   # 👈 all cargo commands run in contracts/
+    working-directory: contracts # 👈 all cargo commands run in contracts/
 
 jobs:
   format:
@@ -94,4 +94,74 @@ jobs:
             ${{ runner.os }}-cargo-build-
             ${{ runner.os }}-cargo-
       - name: Build all crates
-        run: cargo build --all --verbose
+        run: cargo build --all --verbose
+
+  # ─────────────────────────────────────────────
+  # BACKEND — NestJS
+  # ─────────────────────────────────────────────
+  backend:
+    name: Backend (NestJS)
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: backend
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          cache-dependency-path: backend/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Build (TypeScript check)
+        run: npm run build
+
+      - name: Unit tests
+        run: npm run test -- --passWithNoTests
+
+  # ─────────────────────────────────────────────
+  # FRONTEND — Next.js
+  # ─────────────────────────────────────────────
+  frontend:
+    name: Frontend (Next.js)
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: frontend
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Build
+        run: npm run build
+        env:
+          NEXT_PUBLIC_API_URL: http://localhost:3001
+
+      - name: Unit tests
+        run: npm run test -- --passWithNoTests