feat (app): Add Extensive Project Support with GitHub Integration - #10107

Summary

This PR implements comprehensive project support through a provider-based architecture, enabling users to work with projects from multiple sources. The initial implementation focuses on GitHub integration while establishing the foundation for additional providers. Fixes #10104

Key Features Added

🏗️ Provider-Based Architecture

• Provider abstraction system: Unified interface for different project sources
• Extensible provider registry: Easy to add new project providers
• Provider-specific UI components: Custom interfaces for different provider types

🔐 GitHub Provider (Primary Implementation)

• Repository browsing: Direct access to GitHub repositories with search and pagination
• Secure authentication: Support for both classic and fine-grained GitHub tokens
• Branch management: Select branches with protection status indicators
• Automatic cloning: Streamlined repository setup with working branch creation
• Project metadata tracking: Store GitHub-specific project information and PR data

📁 Enhanced Local Project Support

• Unified project selection: Consolidated directory and provider selection
• Improved file operations: Enhanced file search and directory listing APIs
• Better navigation: Enhanced directory browsing with search capabilities

🎨 User Interface Enhancements

• Redesigned project opening flow: Provider selection before project browsing
• GitHub-specific dialogs: Repository selection, branch choosing, and authentication setup
• Comprehensive internationalization: Support for all new features across languages
• Git actions integration: Repository operations available in the prompt interface

Technical Implementation

Backend Changes:

• Provider routes: New /github/* routes for GitHub operations
• GitHub key management: Secure token storage with Zod validation
• Enhanced file routes: Improved /search/file and /find/file endpoints
• Git operations: GitHub API integration with Octokit

Frontend Changes:

• Provider context system: GitHubProjectsProvider for project metadata management
• Unified project dialogs: DialogSelectProject replacing DialogSelectDirectory
• Provider-specific components: GitHub repository and branch selection UIs
• Updated application structure: Provider providers integrated into app context

Security Implementation:

• Encrypted token storage with restricted file permissions (0o600)
• Token validation with proper error handling
• Secure API communication with GitHub

Breaking Changes

• DialogSelectDirectory component removed in favor of provider-based DialogSelectProject
• File search API endpoint changed from find.files to search.files for consistency
• Project opening flow now includes mandatory provider selection step

Future Extensibility

This implementation establishes the foundation for additional project providers:

• GitLab integration: Similar API-based repository access
• Bitbucket support: Atlassian repository integration
• Cloud storage providers: AWS S3, Google Drive, etc.
• Enterprise Git solutions: Self-hosted GitLab, Gitea, etc.
• Archive/project imports: Support for ZIP files, exported projects

The provider architecture makes it straightforward to add new project sources while maintaining a consistent user experience.

Testing

Comprehensive error handling covers:

• Authentication failures: Invalid or expired tokens
• Network issues: Connectivity problems and API rate limits
• Repository access: Permission and visibility restrictions
• Git operations: Clone failures and branch conflicts
• File system operations: Permission and disk space issues

All new UI components include full internationalization support and responsive design.