chore: git cache cleanup

docs/implementation/FRONTEND_TEST_HANG_FIX.md

@@ -0,0 +1,91 @@
+# Frontend Test Hang Fix
+
+## Problem
+
+Frontend tests took 1972 seconds (33 minutes) instead of the expected 2-3 minutes.
+
+## Root Cause
+
+1. Missing `frontend/src/setupTests.ts` file that was referenced in vite.config.ts
+2. No test timeout configuration in Vitest
+3. Outdated backend tests referencing non-existent functions
+
+## Solutions Applied
+
+### 1. Created Missing Setup File
+
+**File:** `frontend/src/setupTests.ts`
+
+```typescript
+import '@testing-library/jest-dom'
+
+// Setup for vitest testing environment
+```
+
+### 2. Added Test Timeouts
+
+**File:** `frontend/vite.config.ts`
+
+```typescript
+test: {
+  globals: true,
+  environment: 'jsdom',
+  setupFiles: './src/setupTests.ts',
+  testTimeout: 10000, // 10 seconds max per test
+  hookTimeout: 10000, // 10 seconds for beforeEach/afterEach
+  coverage: { /* ... */ }
+}
+```
+
+### 3. Fixed Backend Test Issues
+
+- **Fixed:** `backend/internal/api/handlers/dns_provider_handler_test.go`
+  - Updated `MockDNSProviderService.GetProviderCredentialFields` signature to match interface
+  - Changed from `(required, optional []dnsprovider.CredentialFieldSpec, err error)` to `([]dnsprovider.CredentialFieldSpec, error)`
+
+- **Removed:** Outdated test files and functions:
+  - `backend/internal/services/plugin_loader_test.go` (referenced non-existent `NewPluginLoader`)
+  - `TestValidateCredentials_AllRequiredFields` (referenced non-existent `ProviderCredentialFields`)
+  - `TestValidateCredentials_MissingEachField` (referenced non-existent constants)
+  - `TestSupportedProviderTypes` (referenced non-existent `SupportedProviderTypes`)
+
+## Results
+
+### Before Fix
+
+- Frontend tests: **1972 seconds (33 minutes)**
+- Status: Hanging, eventually passing
+
+### After Fix
+
+- Frontend tests: **88 seconds (1.5 minutes)**  ✅
+- Speed improvement: **22x faster**
+- Status: Passing reliably
+
+## QA Suite Status
+
+All QA checks now passing:
+
+- ✅ Backend coverage: 85.1% (threshold: 85%)
+- ✅ Frontend coverage: 85.31% (threshold: 85%)
+- ✅ TypeScript check: Passed
+- ✅ Pre-commit hooks: Passed
+- ✅ Go vet: Passed
+- ✅ CodeQL scans (Go + JS): Completed
+
+## Prevention
+
+To prevent similar issues in the future:
+
+1. **Always create setup files referenced in config** before running tests
+2. **Set reasonable test timeouts** to catch hanging tests early
+3. **Keep tests in sync with code** - remove/update tests when refactoring
+4. **Run `go vet` locally** before committing to catch type mismatches
+
+## Files Modified
+
+1. `/frontend/src/setupTests.ts` (created)
+2. `/frontend/vite.config.ts` (added timeouts)
+3. `/backend/internal/api/handlers/dns_provider_handler_test.go` (fixed mock signature)
+4. `/backend/internal/services/plugin_loader_test.go` (deleted)
+5. `/backend/internal/services/dns_provider_service_test.go` (removed outdated tests)