feat: move add/remove plate buttons to plate tab, sync remove state

Removed add and remove plate buttons from the plate header panel.
The plate tab toolbar now has add/remove buttons with the remove
button state driven by PlateManager.CanRemoveCurrent. MainForm's
Plate > Remove menu item also syncs on plate change.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
aj
2026-04-06 00:12:59 -04:00
co-authored by Claude Opus 4.6
parent ede06b1bf6
commit d65f3460a9
8 changed files with 123 additions and 71 deletions
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