fix(swift-ios): load file folders on demand

[t3dotgg]

The SwiftUI file browser fetched the whole workspace for each folder and could not show ignored files.

Request only the opened folder, cache its listing, and dim ignored entries. Keep older servers usable, route requests through the thread environment and worktree, and keep cached entries with Retry after failed refreshes. Older loads cannot overwrite newer results.

Ports the folder API change. Includes the stale-refresh behavior from the earlier SwiftUI refresh fix. That PR is still open.

Verification: 15 focused native tests passed with zero failures. Covers loading, retries, stale results, cache scope, ignored entries, old servers, and Windows paths. Swift syntax parsing and git diff --check pass. UI evidence is pending the shared verification pass.

Created with Codex.

[cursor]

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[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR changes the production iOS file browser from recursive indexed loading to per-folder on-demand RPCs, adding caching, refresh, stale-request handling, path normalization, and ignored-file presentation. The new request parameter also activates a materially different downstream filesystem-listing path, so the behavior change warrants human review.

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[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	—	6.5 KiB	—	7.8 KiB	✅
Codex	Live turn WebSocket decoded	—	57.0 KiB	—	66.4 KiB	✅
Codex	Live turn messages	—	8	—	21	✅
Claude	Total thread wire	—	13.5 KiB	—	15.1 KiB	✅
Claude	Thread snapshot wire	—	7.1 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	—	8	—	21	✅

Baseline: unavailable · PR result: 13e556f · 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.