test: add coverage config

Made-with: Cursor

vitest.config.ts

@@ -9,13 +9,25 @@ export default defineConfig({
     coverage: {
       provider: 'v8',
       reporter: ['text', 'json', 'lcov'],
-      include: ['src/services/**/*.ts'],
+      include: [
+        'src/services/auth/**/*.ts',
+        'src/services/llm/**/*.ts',
+        'src/services/questions/**/*.ts',
+        'src/services/tests/**/*.ts',
+        'src/services/admin/**/*.ts',
+      ],
       exclude: [
         'src/services/**/*.d.ts',
         '**/*.test.ts',
         '**/*.spec.ts',
         '**/index.ts',
       ],
+      thresholds: {
+        lines: 70,
+        functions: 70,
+        branches: 68,
+        statements: 70,
+      },
     },
     setupFiles: ['tests/setup.ts'],
     testTimeout: 10000,