feat(remote-cursors): add branch-coverage tests for remote-cursors.tsx

[d-oit]

Branch Coverage: remote-cursors.tsx (33.33% -> ~80% branches)

What

5 targeted tests covering the untested branches in the CursorTracker effect handlers.

Coverage Areas

Area	Tests
Mouse move handler	computes offset coordinates via getBoundingClientRect -> setCursor(50, 50)
Text selection	valid selection -> select(startOffset, endOffset, text)
Null selection	getSelection() null -> clearSelect
No ranges	rangeCount 0 -> clearSelect
Whitespace text	trim() empty -> clearSelect

Notes

• Uses vi.hoisted() for the useCursors mock (avoids Vitest TDZ on hoisted vi.mock references)
• mousemove test mocks getBoundingClientRect via spyOn; selection tests mock window.getSelection

[vercel]

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Project	Deployment	Actions	Updated (UTC)
do-knowledge-studio	Ready	Preview, v0	Jul 31, 2026 9:09am

[codacy-production]

Up to standards ✅

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