Add OverlayMetricsManager to avoid workspace shift when flyout is open#508

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tracygardner wants to merge 3 commits intomainfrom

codex/locate-toolbox-workaround-implementation

Commits on Apr 5, 2026

Use custom Blockly metrics manager for overlay flyout behavior
tracygardner
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Stabilize toolbox metrics to prevent category-specific workspace shifts
tracygardner
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Simplify overlay metrics fix to absolute-origin adjustment only
tracygardner
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