Forge ec98bac146 fix: capture selection on toolbar button mousedown - definitive replace fix ...

Root cause (dual bugs):
1. SCOPE BUG: snapStart/snapEnd/snapElement/snapRange were local vars inside
   runAction() but showModal() is a sibling function — those snap vars were
   never in scope inside the Replace button handler. The condition always
   silently fell through, doing nothing.

2. TIMING BUG: Selection was only captured on document mouseup, which could
   race against focus changes when clicking the toolbar.

Fix:
- showModal() now accepts snapStart/snapEnd/snapElement/snapRange as explicit
  parameters — guaranteed in-scope, no closure ambiguity
- Each toolbar button mousedown calls captureForButton() BEFORE any focus
  shift can occur (belt-and-suspenders, works even if e.preventDefault fails)
- Added console.log debug lines to Replace handler and runAction snapshot
- selectionLocked reset on Escape and overlay click (was missing)

2026-03-06 14:36:48 +08:00

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