fix(mobile): hide changed-files navigator and restore refresh in raw diff fallback

[lnieuwenhuis]

When the native diff view is unavailable, the changed-files widget falls back to a raw patch ScrollView but keeps a navigator whose scroll targets no-op and offers no way to refresh on iOS.

Hide the navigator and its toggle in fallback mode and add pull-to-refresh to the fallback ScrollView.

Builds on #7867 (null-safe fallback) by addressing its two unresolved review threads.

Built with muse-spark-1.3-contributor via OpenCode in T3 Code.

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Note

Low Risk
Review UI fallback and visibility gating only; no changes to auth, networking, or diff data loading.

Overview
When resolveNativeReviewDiffView() returns null (missing native module or still registering), ReviewSheet no longer assumes a native component exists. The native diff branch runs only when resolution succeeds; otherwise parsedDiff.kind === "files" degrades to an inline raw patch with a short “native diff view unavailable” message instead of crashing.

The changed-files workspace inspector and the sidebar.right header toggle are gated on a resolved native surface, since file navigation depends on scrollToFile on that view. In raw fallback, opening the pane would show an empty column or non-functional controls, so both are hidden in that case.

The fallback ScrollView (raw patch, empty states, and the new files-without-native path) gets RefreshControl wired to the existing handlePullToRefresh, restoring pull-to-refresh on iOS where only Android had a “Refresh current diff” menu action.

^{Reviewed by Cursor Bugbot for commit 9b9b859. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Hide changed-files navigator and restore refresh in raw diff fallback for ReviewSheet

• Changes native diff view resolution to return a nullable result instead of asserting a component is always available
• Adds an inline raw-patch fallback for file diffs when native resolution returns null, with pull-to-refresh via RefreshControl
• Gates changed-file inspector registration and the auxiliary-pane toolbar button so they are hidden when the native diff view is unavailable
• Adds RefreshControl to the non-native review content ScrollView for empty and other fallback states

^{Macroscope summarized 9b9b859.}

[macroscopeapp]

Approvability

Verdict: Approved at 9b9b859

Macroscope's review found this PR approvable — This is a focused one-file mobile bug fix that preserves the native diff path while making unavailable-native-view states render safely, hiding unusable navigation controls, and restoring refresh through the existing handler. It introduces no schema, security, deployment, product-default, or static-analysis changes.

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