Feature Request: Add line-by-line code review functionality to file change approvals

Description:

Currently, when Claude Code makes changes to a file and presents them for review in the IDE, users can only accept or reject the entire change with a single feedback message. This limits the
ability to provide detailed, specific feedback on complex changes.

Feature Request:

Add a PR-like review interface that allows users to:

1. Comment on specific lines: Add a comment button/icon next to each changed line in the diff view
2. Accumulate feedback: Store line-specific comments in memory as the user reviews
3. Batch rejection: When rejecting, automatically aggregate all line comments into a structured feedback string
4. Clear review state: Reset comments after accept/reject actions

Expected Behavior:

Line 15: Use dayjs instead of Date constructor
Line 23: Add proper error handling here
Line 30: This function should be async
Line 45: Missing TypeScript type annotation

This aggregated feedback would be passed to Claude, allowing for comprehensive fixes in a single iteration.

Current Workaround:
Users must manually format line-by-line feedback in the rejection message, which is cumbersome and error-prone.

Benefits:

• Improved developer experience
• More efficient code review workflow
• Reduced back-and-forth iterations
• Better alignment with standard PR review practices

Technical Implementation:
The plugin would need:

• UI components for line-level commenting
• Local state management for comment storage
• String formatting/aggregation on rejection
• Comment persistence during review session

This feature would significantly enhance the code review experience and bring Claude Code closer to industry-standard review workflows.