test: Created GitHub Actions CI pipeline with type-check, test, coverag…

- ".github/workflows/ci.yml"

GSD-Task: S12/T04

Author: Matt-Aurora-Ventures

.github/workflows/ci.yml

@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - 'milestone/**'
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  verify:
+    name: Verify
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: npm
+          cache-dependency-path: |
+            backend/package-lock.json
+            frontend/package-lock.json
+
+      # --- Backend ---
+      - name: Install backend dependencies
+        run: cd backend && npm ci
+
+      - name: Backend type check
+        run: cd backend && npx tsc --noEmit
+
+      - name: Backend tests
+        run: cd backend && npx vitest run
+
+      - name: Backend coverage
+        run: cd backend && npx vitest run --coverage
+
+      # --- Frontend ---
+      - name: Install frontend dependencies
+        run: cd frontend && npm ci
+
+      - name: Frontend type check
+        run: cd frontend && npx tsc -b
+
+      - name: Frontend build
+        run: cd frontend && npx vite build