implement calls product surface with fixtures and ui tests

[hankli29]

Summary

Implements the initial Calls product surface against call-notes/v1 contract and deterministic CallSnapshot fixtures.
Provides a Live/Recent Calls rail and a note-first workspace for viewing call status, notes, AI-enhanced proposals, transcripts, capture gaps, bookmarks, and privacy states.

Implemented in this PR

• Full /calls layout: rail + note-first pane + collapsed transcript
• Capture states: Paused, Partial, Completed, and Failed, with Resume/Retry controls when applicable
• Transcript expanded: bookmark + speaker/timestamp, gap timeline
• Private-note redaction: "Private to the owner"
• AI-enhanced tab: proposal summary
• Desktop + mobile (~390px, rail closed + reopened)

Testing

9 UI tests covering:

• Calls rail filtering and call selection
• Transcript rendering and visible capture gaps
• Resetting view state when switching between calls
• Rendering different call scenarios: completed, paused, failed, partial with capture gaps, private-note redaction, AI enhancement ready

Known Limitations

• the surface currently uses data from fixtures (sampleCalls), not live APIs
• capture, note editing, bookmarking, enrichment, privacy, and knowledge-inclusion commands are not implemented yet
• AI-enhanced accept/reject without overwrite not implemented yet, still display only
• notes are read only: note saving/saved/failed state for notes comes from fixture rather than actual save requests
• owner-only controls are not permission-gated yet: CallSnapshot does not expose viewer identity/capabilities, so UI cannot restrict certain actions (editing, bookmarking, enrichment, privacy)

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Project	Deployment	Actions	Updated (UTC)
launch-stack	Ready	Preview	Aug 21, 2026 9:03pm
pdr-ai-v2	Ready	Preview	Aug 21, 2026 9:03pm