Fam Zheng 63bbbae17c feat: show plan diff in execution log when revise_plan is called
- apply_plan_diff now returns a YAML unified diff string
- Pure Rust LCS diff implementation (no external dependency)
- revise_plan logs the diff to execution log with ```diff fencing
- Frontend renders diff with green/red syntax highlighting
2026-03-10 19:03:47 +00:00
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2026-03-09 12:01:29 +00:00