v0.26.3: Claude Code hooks migration, improved suggestions, and GLM support

New features

- Skills Enabled by Default - Skills command now enabled for all users
- Claude Code Hooks Auto-Migration - Automatically detects and imports hooks from Claude Code CLI with interactive prompts. Smart translation converts bash_tool to Execute and CLAUDE_CWD to DROID_CWD, preventing duplicates and tracking migration state
- @ Suggestions Improvements - Now includes folders in addition to files with better UI and performance

Bug fixes

- Fixed GLM4.6 configuration issues preventing it from working in spec mode
- Fixed warmup API calls
- Shift+Backspace now deletes single character like Backspace