refactor: Improve plan mode with explicit approval request

[edenreich]

Summary

This PR refactors the planning system to replace automatic plan approval with an agent-controlled explicit approval mechanism.

Changes

Core Changes:

1. Added RequestPlanApproval tool - New tool that allows agents to explicitly submit plans for approval
2. Removed automatic plan approval trigger - Plans are now only submitted when the agent explicitly requests approval
3. Enhanced plan mode capabilities - Added TodoWrite and RequestPlanApproval tools to plan mode
4. Updated system prompts - More actionable planning prompts that guide agents to use the new approval mechanism
5. Removed dedicated plan approval UI component - Integrated approval into the existing conversation flow
6. Improved autocomplete filtering - Better tool filtering based on agent mode (plan vs execution)

Technical Details:

• New file: internal/services/tools/request_plan_approval.go - Implements the RequestPlanApproval tool
• Deleted file: internal/ui/components/plan_approval_component.go - Dedicated UI component no longer needed
• Modified files: 15 files with improvements to agent services, conversation handling, and UI components

Benefits:

• More control: Agents decide when to request plan approval
• Better UX: Integrated approval flow reduces context switching
• Flexibility: Agents can create and refine plans before requesting approval
• Cleaner code: Removes complex automatic triggering logic

Testing

• All existing tests pass
• Manual testing of plan creation and approval flow
• Verified TodoWrite integration in plan mode

Migration Notes

No breaking changes - existing workflows continue to work with improved UX.

[edenreich]

PR Description Update Summary:

Based on comprehensive code analysis, this PR includes more extensive changes than initially documented:

Comprehensive Changes Identified:

Major Improvements:

1. Inline Plan Approval - Replaced modal with colored inline buttons (Accept/Reject/Auto-Approve)
2. New InputStatusBar Component - Shows model, theme, agents, context usage, and mode indicators
3. Enhanced State Management - Added PlanApprovalUIState and PlanApprovalAction enum
4. Simplified InputView - Removed text selection mode, consolidated UI logic
5. Improved Event System - Added plan approval events and better integration

File Changes Summary:

• 34 files total (not 15 as initially documented)
• 1853 insertions, 1889 deletions
• Added 2 new files, removed 3 files
• 29 files modified with architectural improvements

Key Benefits:

• Better UX with inline approval workflow
• Enhanced visibility with status information
• Cleaner architecture with removed duplicate components
• Comprehensive keyboard navigation for plan approval

The PR description should be updated to reflect these comprehensive improvements.

[ig-semantic-release-bot]

🎉 This PR is included in version 0.76.2 🎉

The release is available on GitHub release

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