feat(mobile): capture Live Activities and agent notifications in showcase screenshots

[juliusmarminge]

The Mobile Showcase Screenshots workflow only captured in-app screens, so the store listings never showed the iOS Live Activity, Android's ongoing agent-activity notification, or agent alerts.

This adds an agent-activity scene to the iPhone (6.9", 6.5"), Android phone, and 7"/10" tablet captures. The iPad is skipped because the lock screen doesn't rotate with the app.

• App side: the showcase coordinator resets to Home, then stages four relay-shaped rows against the seeded fixture threads (approval, input, working, done). On iOS it starts a real Live Activity. On Android it posts the same FCM-shaped data the native receiver renders, through a new showShowcaseActivity native function. The scene reports ready only after staging succeeds.
• iOS runner: taps the notification prompt, locks the simulator with AXe, simctl pushes the approval alert, and wakes the display if it is still dark. It also answers the first "Allow Live Activities?" prompt. CI installs AXe from its trusted Homebrew tap.
• Android runner: pre-grants POST_NOTIFICATIONS and snoozes the emulator's own system notices. It then expands the shade for the capture and collapses it afterwards.

Evidence (CI run 35921583721, dark) is in the first comment.

Known gap: the iPhone 17 Pro Max simulator (6.9") has an always-on display, so its lock screen is captured dimmed. The status bar is missing and the status labels are grey. The 6.5" capture is not affected. Fixing it needs the simulator's Always On preference key, which is a follow-up.

🤖 Generated with Claude Code (Claude Opus 5.5)

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Summary by CodeRabbit

• New Features
  • Added an agent activity scene to mobile showcases, featuring activity across four sample threads and an approval alert.
  • Android showcases can display the activity in a Live Update; iOS showcases can display it as a Live Activity and on the lock screen.
• Documentation
  • Updated screenshot guidance and expected image counts to include the new scene.

[juliusmarminge]

Evidence from CI run 35921583721 (dark theme), new agent-activity scene:

iOS: Live Activity + approval alert on the lock screen

iPhone 6.9"	iPhone 6.5"

Known gap: the 6.9" simulator (iPhone 17 Pro Max) captures the lock screen in its always-on dimmed state.

Android: ongoing Live Update + alert in the notification shade

Phone	7" tablet	10" tablet

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This adds a substantial cross-platform screenshot capability spanning native notification code, Live Activities, lock-screen automation, CI tooling, and default capture configuration. The multi-layer native and simulator behavior is broader than a small isolated harness change and merits human review.

^{You can add or adjust custom eligibility rules. Learn more.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.5 KiB	13.5 KiB	+39 B (+0.3%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.1 KiB	7.1 KiB	−6 B (−0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.4 KiB	6.5 KiB	+45 B (+0.7%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	56.2 KiB	56.3 KiB	+44 B (+0.1%)	66.4 KiB	✅
Codex	Live turn messages	9	10	+1 (+11.1%)	21	✅
Claude	Total thread wire	13.5 KiB	13.5 KiB	+11 B (+0.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.1 KiB	7.1 KiB	+7 B (+0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.4 KiB	+4 B (+0.1%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	57.0 KiB	57.1 KiB	+44 B (+0.1%)	66.4 KiB	✅
Claude	Live turn messages	9	10	+1 (+11.1%)	21	✅

Baseline: f5ef0dd · PR result: 82a9d41 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 114.0 KiB
• Claude decoded thread snapshot: 114.6 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.