feat(right-panel): add branch-coverage tests for right-panel.tsx

[d-oit]

Branch Coverage: right-panel.tsx (54.38% -> ~75% branches)

What

19 targeted tests covering key branches in the right-panel.tsx component.

Coverage Areas

Area	Tests
CitationsPanel	cited sources render, empty state when last assistant lacks citations, grounded footer
InspectorPanel	no-entity state, selected-id fallback, close button, connection click, missing-target link filtering, confirm delete
SearchPanel ranked	mode switch calls search, empty library state, entity result with meta, claim result via entityId, unresolved target, result click startEdit, no-targetId guard
SearchPanel keyword	result click startEdit, create-entity button calls startNew

Notes

• Uses vi.hoisted() for the store and search mocks (avoids Vitest TDZ on hoisted vi.mock references)
• Follow-up observation: RightPanel passes onCreateEntity={() => startNew()} and the store startNew is () => void, so the create-entity button does not pre-fill the entity name despite its label; a store signature change is out of scope for this coverage PR

[vercel]

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Project	Deployment	Actions	Updated (UTC)
do-knowledge-studio	Ready	Preview, v0	Jul 31, 2026 9:44am

[codacy-production]

Up to standards ✅

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