Comprehensive vscode extension redesign with sidebar reorganization,
new features, and enhanced agent integration:
- Redesign sidebar UI: reduce 6 panels to 3, declutter layout
- SCM provider for tracking agent-modified files
- Checkpoint system for saving/restoring agent state
- Diagnostic integration for surfacing errors in editor
- Line-level editor decorations for agent-modified lines
- Git integration for visualizing agent changes
- Execution plan viewer for live agent step visualization
- Approval/permissions mode system
- Auto-inject editor selection and diagnostics in chat
- Route workflow buttons through Chat panel
- Handle extension UI requests from agent (select, confirm, input)
- Session persistence, ISO timestamp support, descriptive checkpoints
- Bump to v0.3.0
59d80e200a