feat(test): add E2E testing infrastructure with test mode authentication bypass

- Add Test Mode for authentication bypass in E2E testing and development
  - Implement TestModeAuthenticationHandler and TestModeAuthenticationMiddleware
  - Add TestModeOptions configuration class
  - Update Program.cs to conditionally register GitHub OAuth based on test mode
  - Update AuthorizationService to bypass team membership checks in test mode

- Implement E2E testing framework with Playwright
  - Create 10xGitHubPolicies.Tests.E2E project with dual-host architecture
  - Add Page Object Model with DashboardPage for maintainable tests
  - Implement test data management utilities (RepositoryHelper, DatabaseHelper)
  - Add workflow tests covering complete policy enforcement scenarios

- Extend GitHubService with 9 E2E testing methods
  - Repository operations: CreateRepositoryAsync, DeleteRepositoryAsync, UnarchiveRepositoryAsync
  - File operations: CreateFileAsync, UpdateFileAsync, DeleteFileAsync (2 overloads)
  - Issue operations: CloseIssueAsync, GetRepositoryIssuesAsync
  - Workflow operations: UpdateWorkflowPermissionsAsync

- Add comprehensive test coverage
  - Contract tests: FileCrudContractTests, RepositoryCrudContractTests
  - Integration tests: FileCrudOperationsTests, IssueManagementTests, RepositoryCrudOperationsTests
  - Enhanced GitHubApiResponseBuilder for test data creation

- Update documentation
  - Add docs/testing-e2e-tests.md with complete E2E testing guide
  - Update testing-strategy.md with E2E testing section
  - Update github-integration.md with new E2E testing methods
  - Update README.md with Test Mode configuration and E2E testing sections
  - Update CHANGELOG.md with version 1.4 details

- Clean up
  - Remove obsolete plan file (.cursor/plans/githubservice-integration-contract-f95b8e0c.plan.md)
  - Update .gitignore to exclude TestResults directory
  - Update solution file to include new test projects

Author: mackowski

.ai/implementation-plans/e2e-initial-tests.plan.md

@@ -0,0 +1,173 @@
+# E2E Testing Implementation Plan
+
+## Overview
+
+This plan outlines the implementation of End-to-End (E2E) testing infrastructure for the 10x GitHub Policy Enforcer using Playwright with .NET. The implementation follows a phased approach, focusing on what needs to be accomplished rather than detailed implementation steps.
+
+## ✅ Completed Phases
+
+### Phase 1: E2E Test Project Setup ✅
+**Status: COMPLETED**
+
+- Created E2E test project `10xGitHubPolicies.Tests.E2E`
+- Added required NuGet packages (Playwright, NUnit, EF Core, FluentAssertions)
+- Configured project references to main application
+- Set up Playwright browser installation
+- Added to solution file
+
+### Phase 2: Test Infrastructure Classes ✅
+**Status: COMPLETED**
+
+- **E2ETestBase**: Base class inheriting from `PageTest` with proper service configuration
+- **TestDataManager**: Service for creating test repositories with various compliance states
+- **TestCleanupService**: Service for cleaning up test data from database and GitHub
+- **GitHubService Extensions**: Extended GitHub service with E2E-specific methods
+
+### Phase 3: Page Object Models ✅
+**Status: COMPLETED**
+
+- **DashboardPage**: Page object model for dashboard interactions
+- Methods for navigation, scanning, violation counting, filtering
+- Proper Playwright integration with async/await patterns
+
+### Phase 4: Basic E2E Tests ✅
+**Status: COMPLETED**
+
+- **CompleteE2EWorkflowTests**: Comprehensive test covering:
+  - Test repository creation (compliant and non-compliant)
+  - URL accessibility testing (authenticated vs unauthenticated)
+  - Database connectivity verification
+  - GitHub API integration testing
+  - Complete cleanup verification
+
+### Phase 5: Configuration and Setup ✅
+**Status: COMPLETED**
+
+- **Playwright Configuration**: `playwright.config.ts` with proper browser setup
+- **User Secrets Integration**: E2E tests use same GitHub App configuration as main app
+- **Service Registration**: Proper DI container setup with all required services
+- **Test Execution**: Successfully running against live application
+
+## 🎯 Current Status
+
+The E2E testing infrastructure is **FUNCTIONAL** and successfully:
+
+1. ✅ Creates test repositories on GitHub
+2. ✅ Tests web application URLs (authenticated/unauthenticated)
+3. ✅ Verifies database connectivity
+4. ✅ Tests GitHub API integration
+5. ✅ Performs complete cleanup of test data
+6. ✅ Runs against live application instance
+
+## 📋 Remaining Tasks
+
+### Phase 6: Application Authentication Bypass
+**Status: PENDING**
+
+**What to accomplish:**
+- Refactor application to support test mode without authentication
+- Configure application to bypass OAuth for E2E testing
+- Ensure all dashboard functionality works without user authentication
+- Set up test mode configuration and environment detection
+
+**Key requirements:**
+- Add test mode configuration option
+- Bypass authentication middleware in test mode
+- Ensure all services work without authenticated user context
+- Configure application to run in test mode for E2E testing
+
+### Phase 7: Enhanced E2E Scenarios
+**Status: PENDING**
+
+**What to accomplish:**
+- Implement authenticated user workflow testing (now possible without OAuth)
+- Add policy violation detection and action verification
+- Create repository scanning workflow tests
+- Add dashboard interaction tests with real data
+
+**Key scenarios to test:**
+- Complete scan workflow from dashboard trigger to results
+- Policy violation creation and GitHub action execution
+- Repository compliance status updates
+- Dashboard interactions without authentication barriers
+
+## 🏗️ Architecture Overview
+
+### Test Structure
+```
+10xGitHubPolicies.Tests.E2E/
+├── E2ETestBase.cs              # Base test class with service setup
+├── TestDataManager.cs          # Test repository creation/management
+├── TestCleanupService.cs       # Test data cleanup
+├── CompleteE2EWorkflowTests.cs # Main E2E workflow tests
+├── WorkflowTests.cs            # Additional workflow scenarios
+├── Pages/
+│   └── DashboardPage.cs        # Page object model
+└── playwright.config.ts        # Playwright configuration
+```
+
+### Service Integration
+- **GitHubService**: Extended with E2E-specific methods
+- **Database**: Direct EF Core integration for verification
+- **Configuration**: User secrets integration for GitHub App
+- **Playwright**: Browser automation for UI testing
+
+## 🎯 Success Criteria
+
+### ✅ Achieved
+- [x] E2E test project builds and runs successfully
+- [x] Test data manager creates and cleans up repositories
+- [x] Application URLs are properly tested
+- [x] Database connectivity is verified
+- [x] GitHub API integration works correctly
+- [x] Complete test data cleanup is performed
+
+### 🎯 Remaining Goals
+- [ ] Application authentication bypass implementation
+- [ ] Test mode configuration and setup
+- [ ] Authenticated user workflow testing (without authentication)
+- [ ] Policy violation detection and action verification
+- [ ] Complete scan workflow testing
+- [ ] Dashboard interaction testing
+
+## 📊 Test Coverage Areas
+
+### ✅ Covered
+- **Infrastructure**: Service setup, configuration, connectivity
+- **GitHub Integration**: Repository creation, file operations, cleanup
+- **Web Application**: URL accessibility, basic navigation
+- **Database**: Connection verification, data cleanup
+
+### 🎯 To Be Covered
+- **Application Configuration**: Test mode setup and authentication bypass
+- **User Workflows**: Dashboard interactions without authentication
+- **Policy Enforcement**: Violation detection, action execution
+- **Scanning Process**: Complete scan workflow, result verification
+- **Test Mode Operations**: Application behavior without OAuth
+
+## 🔧 Technical Implementation Notes
+
+### Key Design Decisions
+1. **Real GitHub Integration**: Tests use actual GitHub API, not mocks
+2. **User Secrets**: E2E tests share GitHub App configuration with main app
+3. **Service Reuse**: Extended existing GitHubService rather than creating test-specific services
+4. **Comprehensive Cleanup**: Both database and GitHub data are cleaned up
+5. **Live Application Testing**: Tests run against actual running application
+6. **No Authentication**: Application runs in test mode without OAuth requirements
+
+### Configuration Requirements
+- GitHub App with required permissions
+- Database connection string
+- User secrets properly configured
+- Application running on https://localhost:7040
+- Application configured to run without authentication for E2E testing
+
+## 🚀 Next Steps
+
+1. **Refactor application for test mode** - Implement authentication bypass for E2E testing
+2. **Configure test mode environment** - Set up application configuration for test mode
+3. **Implement dashboard workflow testing** - Test authenticated workflows without OAuth
+4. **Create policy violation scenarios** - Test the complete policy enforcement workflow
+5. **Add scanning workflow tests** - Test complete scan process from trigger to results
+
+The foundation is solid and functional. The next critical step is refactoring the application to support test mode without authentication, which will enable comprehensive E2E testing of all dashboard functionality.