v0.5.3

Changes

Added

• resolve_lines tool: hunk-based line number resolution for LLM review comments.
  Three-tier algorithm ported from alibaba/open-code-review.
  Returns {startLine, endLine} or {unresolved: true}.

Removed

• review_git_diff tool: redundant with bash git diff.
• review_git_comment / review_git_comments: ghost tools referenced in docs but never implemented.

Changed

• Internal: cleaned up unused imports and helper functions.
• Review panel: removed references to non-existent tools.