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

[d-oit]

Branch Coverage: chat-view.tsx (56.94% -> ~75% branches)

What

16 targeted tests covering key branches in the chat-view.tsx component.

Coverage Areas

Area	Tests
Send guards	empty input, whitespace-only, chatLoading
Keyboard	Enter sends, Shift+Enter does not
Clear guard	early return when chat empty
Citations	section render, singular/plural count, expand/collapse toggle, entity open via selectEntity + setView
Char counter	clay color at 2000 chars
Suggestions bar	visible with 1 message, chip calls sendMessage

Notes

• Uses vi.hoisted() for the store mock (avoids Vitest TDZ on hoisted vi.mock references)
• Citation collapse test clicks once per act with waitFor between clicks to avoid stale closures

[vercel]

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Project	Deployment	Actions	Updated (UTC)
do-knowledge-studio	Ready	Preview, v0	Jul 31, 2026 9:21am

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

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