feat(swift-ios): keep failed source control output visible with accessible Retry

[saphid]

What Changed

Keep a failed Source Control operation visible above the existing repository state and provide an accessible Retry action. If a Git operation succeeds but the following refresh fails, Retry reloads status instead of repeating the operation.

Why

A transient error could disappear, and a failed status refresh could be mistaken for a failed commit or push. Separate operation and refresh recovery prevents that accidental replay.

Verification and remaining proof

Candidate: 87ce6873a729a3c8e2d330f0cd056f3225c665e5. This PR targets t3code/rebuild-mobile-app-swift; its historical integration base is 22b22f1463b83963d851bd0574a36a20f224a28d. The current native parent inspected in the readiness review is b99405468a6b2be1e0f67d551ece824b1627e35c. Merging this child does not by itself deliver the native app to upstream main.

The hosted native build/test job passed on the candidate. The earlier report records 20 FeatureToolRecoveryTests at this head against target 22b22f1. The earlier 374-test bundle predates that integration and was not rerun afterwards. No local build, test or client session was run for this description update; full historical local invocations were not recovered here.

Refresh against the current native parent and capture retained errors, repeated failure, successful retry and VoiceOver focus. Keep mutation-success/refresh-failure verification in the focused suite. This PR is not evidence-complete for human merge review against the current native parent.

Earlier visual evidence

These retained captures/reports belong to the revisions and conditions stated below. They were not recaptured, visually inspected or revalidated for current-parent integration in this pass. Historical access/playback statements describe the original check, not a new one.

Earlier captures and their original conditions

The following media was captured on pre-merge head 47389c712. It remains useful for historical comparison but is not current-head proof.

Before, healthy repository in light appearance

Before, healthy repository in dark appearance

After, retained failure and Retry in light appearance

After, retained failure and Retry in dark appearance

Interaction video

Play or download the MP4.

Tracking: native work item #87.

Automated summaries of the candidate

[!NOTE]

Add persistent failure banner with accessible Retry to source control UI

• Replaces transient alert-based error messaging in FeatureSourceControlView with a retained failure banner that shows a scroll-limited message and an accessible Retry button that replays the exact failed operation (including commit messages)
• Adds a reusable recovery infrastructure in FeatureToolRecovery.swift: FeatureToolFailureState manages cancellation-aware failure state with one-time recovery announcements, FeatureToolRunState prevents overlapping operations via single-flight, and FeatureRecoverableOperation protocol models retryable operations
• Shifts accessibility focus to failure content on error and back to content on recovery, announcing success exactly once
• Changes performSourceControlAction on FeatureClient protocol and NativeFeatureClient to return Void instead of FeatureSourceControlStatus; callers now refresh status themselves after mutations
• Behavioral Change: conformers of FeatureClient.performSourceControlAction must drop the return value; the source control view now performs an explicit post-action status refresh rather than relying on the method's return value

^{Macroscope summarized 87ce687.}

Description and evidence audit: GPT-6 in Codex, using prepare-proof-media from #9926.

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[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This introduces a new production recovery workflow for source-control operations, including persistent failure UI, accessibility focus management, single-flight state, and Retry for side-effectful actions. It also changes the mutation and status-refresh boundary, so the scope and runtime behavior warrant human review.

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