fix(desktop): include Chrome app text in macOS SnapShots

[shivamhwp]

Chrome SnapShots on macOS can omit app text because CoreGraphics reports the page title while accessibility appends - Google Chrome – Profile. The matcher required the two titles to be identical.

Allow that suffix for macOS Chrome and Chromium bundle IDs after checking for exact matches. Keep process scoping and bounds checks, and reject ambiguous suffix matches even if one window reports itself active. Other platforms and applications keep exact matching.

Fixes #10896. Stacked on #11298. Internal refinement remains pending after the final Fable retry failed.

Validation: 96 focused tests pass across the matcher, accessibility reader, worker lifecycle and macOS capture controls. Six reported-title variants fail against the parent implementation. Desktop typecheck and scoped lint pass. The reader test returns accessibility context for the reported title pair and rejects other processes/applications. Native macOS Chrome verification remains pending; Edge, Brave and Arc are outside this fix. SnapShots are desktop-only; retained context uses existing contracts for local and remote delivery.

Model: GPT-6. Harness: Codex.

[macroscopeapp]

Approvability

Verdict: Approved at 5dcefb7

Macroscope's review found this PR approvable — The production change is narrowly confined to matching macOS Chrome/Chromium accessibility windows whose titles include browser profile suffixes, while preserving existing exact-match and bounds safeguards. Focused tests cover supported variants, ambiguity, platform restrictions, and unrelated titles.

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

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

ℹ️ No successful main baseline artifact is available yet. This run establishes the initial measurement.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	—	13.6 KiB	—	15.1 KiB	✅
Codex	Thread snapshot wire	—	7.0 KiB	—	7.3 KiB	✅
Codex	Live turn WebSocket wire	—	6.6 KiB	—	7.8 KiB	✅
Codex	Live turn WebSocket decoded	—	57.1 KiB	—	66.4 KiB	✅
Codex	Live turn messages	—	10	—	21	✅
Claude	Total thread wire	—	13.6 KiB	—	15.1 KiB	✅
Claude	Thread snapshot wire	—	7.0 KiB	—	7.3 KiB	✅
Claude	Live turn WebSocket wire	—	6.5 KiB	—	7.8 KiB	✅
Claude	Live turn WebSocket decoded	—	57.8 KiB	—	66.4 KiB	✅
Claude	Live turn messages	—	9	—	21	✅

Baseline: unavailable · PR result: 5dcefb7 · 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: 113.9 KiB
• Claude decoded thread snapshot: 114.6 KiB

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