feat(mindmap): add branch-coverage tests for mindmap-view.tsx

[d-oit]

Branch Coverage: mindmap-view.tsx (~33% → ~65% branches)

What

27 targeted tests covering the lowest-coverage view component (mindmap-view.tsx).

Coverage by Area

Area	Tests
Empty state	shows empty state when no entities
Node interactions	click, Enter, Space, focus
Keyboard navigation	ArrowRight, ArrowLeft, ArrowDown, ArrowUp, Home, End
Toolbar actions	add child, rename, delete, undo, redo
Global shortcuts	Ctrl+Tab, F2, Delete, Backspace
Controls	root selector, depth slider, compact toggle, sync
UI features	Expand/Collapse chevron, toggle expansion
Export	export PNG (button click, coverage-only)

[vercel]

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Project	Deployment	Actions	Updated (UTC)
do-knowledge-studio	Ready	Preview, v0	Jul 30, 2026 4:15pm

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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