refactor(ci): add vitest coverage threshold gate to CI pipeline

Author: Nehul-Singh-555

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
         run: npm run typecheck
 
       - name: Run Unit Tests (Vitest)
-        run: npm run test
+        run: npm run test:coverage
 
   build:
     name: Production Build

vitest.config.ts

@@ -7,6 +7,16 @@ export default defineConfig({
     globals: true,
     include: ['**/*.test.ts', '**/*.test.tsx'],
     exclude: ['node_modules', '.next'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'lcov'],
+      thresholds: {
+        statements: 70,
+        branches: 70,
+        functions: 70,
+        lines: 70,
+      },
+    },
   },
   resolve: {
     alias: {