Mission Control P1: quick assign UI + remove AC1 dynamic skip

[krusty-agent]

Summary

• Add a quick Assign control on list items to support Mission Control assignee workflows directly from list view
• Wire quick assign action to api.items.updateItem (assigneeDid = userDid)
• Show lightweight assignment feedback text (Assigned) after mutation success
• Update e2e/mission-control-phase1.spec.ts AC1 to remove feature-gated dynamic skip and assert assign control visibility
• Wire list-level collaborator presence in ListView using Convex presence heartbeat/offline mutations + presence.getListPresence
• Add a visible session indicator chip in list header: 👀 {n} viewing now
• Remove AC3 feature-gated dynamic skip (hasPresenceUi) from e2e/mission-control-phase1.spec.ts

Why

Mission Control tracker called out assignee/activity/presence wiring and dynamic skip removals. This PR now covers AC1 + AC2/AC5b test-path cleanup + AC3 presence wiring in the app shell.

Test Evidence

Prior targeted run (already in branch)

npm run test:e2e -- e2e/mission-control-phase1.spec.ts -g "baseline harness boots app shell|AC1 assignee round-trip"

Result:

• 1 passed (baseline harness boots app shell)
• 1 skipped (AC1 assignee round-trip) due existing environment auth/app-shell readiness gate
• 0 failed

New targeted run for AC3

npm run test:e2e -- e2e/mission-control-phase1.spec.ts -g "AC3 presence freshness"

Result:

• 0 passed
• 1 skipped (AC3 presence freshness) due existing environment auth/app-shell readiness gate (openAuthenticatedApp)
• 0 failed

The AC3 feature availability skip has been removed; remaining skip is environment readiness only.

[krusty-agent]

Progressing next P0 task: Phase 1: Unskip Mission Control e2e tests with seeded auth fixtures.\n\nWhat changed in :\n- Reworked AC2 harness to use existing item-details activity surface (no feature-flag skip for missing Activity button).\n- Reworked AC5b perf harness to measure item-details activity open latency directly (removed dynamic skip tied to Activity button existence).\n- Added helper for deterministic item-details modal open checks.\n\nTargeted validation:\n\n\n\nResult: \n- Baseline passed\n- Remaining skips are environment auth-shell readiness gate (), not missing Activity button wiring.

[krusty-agent]

Progressing next P0 task: Phase 1: Unskip Mission Control e2e tests with seeded auth fixtures.

What changed in commit e9cad52:

• Reworked AC2 harness to use existing item-details activity surface (no feature-flag skip for missing Activity button).
• Reworked AC5b perf harness to measure item-details activity open latency directly (removed dynamic skip tied to Activity button existence).
• Added helper for deterministic item-details modal open checks.

Targeted validation:

npm run test:e2e -- e2e/mission-control-phase1.spec.ts -g "baseline harness boots app shell|AC2 activity log completeness|AC5b perf floor harness"

Result: 1 passed, 2 skipped

• Baseline passed
• Remaining skips are environment auth-shell readiness gate (openAuthenticatedApp), not missing Activity button wiring.

[krusty-agent]

Superseded by consolidated PR #167: #167