[jdlar18]

Problem

On Android, the new-thread draft screen sometimes renders pushed down by roughly a native header's height: an empty band sits below the status bar, the "New thread" header starts far too low, and the composer at the bottom is clipped under the gesture bar with its toolbar row off screen. Observed on a physical Android device before the fix, when the draft was opened for a branch that still had to be checked out (for example "New thread on " from a thread's long-press menu).

Expected: the sheet header sits directly under the status bar and the composer, including its toolbar row, is fully visible above the gesture bar.

Change

The NewTaskDraft route in NewTaskSheetStack inherited headerShown: true from the sheet header options. The screen itself hides the native header through NativeStackScreenOptions, which calls navigation.setOptions from a layout effect once the screen has committed, so the native header is already part of the route's first native layout. On Android, react-native-screens lays out the content under the native AppBar using Material ScrollingViewBehavior. Removing the toolbar after that initial layout is a suspected cause of the reported persistent offset and clipped composer; the emulator checks below demonstrate the delayed header removal, but do not confirm that persistent failure or its resolution. While NewTaskDraftRouteScreen shows its "Switching branch..." state, NewTaskDraftScreen is not mounted at all, so the native header stays visible until the draft mounts and hides it. That is why the thread-row "New thread on " action, the one entry that passes a branch needing a checkout, is the path that hits the late hide; the plain project-picker path mounts the draft immediately.

This applies the same fix the repo already uses for DETAIL_HEADER_OPTIONS and the Settings tab: the route hides the native header from the first layout on Android (headerShown: Platform.OS !== "android"), so the native header never takes part in layout. iOS is unchanged.

One observable side effect on Android: the "Switching branch..." loading state no longer shows the transient native header above it, so its centered text now sits in the full screen height instead of below a header. No dismissal path is lost there, since that route already had headerBackVisible: false and the loading state blocks removal while a checkout is pending.

Scope and approval

Very small, focused fix for an obvious visual bug: one option on one route in apps/mobile/src/Stack.tsx, matching an existing documented pattern in the same file. Android also loses the transient native header during branch switching, as described above. iOS is unchanged.

Verification

• Traced the mechanism in the vendored react-native-screens (ScreenStackFragment.kt sets a ScrollingViewBehavior on the screen under the AppBar; ScreenStackHeaderConfig.kt removes the toolbar when headerShown flips to false after mount), and matched it to the two existing workarounds in Stack.tsx (DETAIL_HEADER_OPTIONS, Settings tab).
• vp run check:changed: format, lint, knip and typecheck of @t3tools/mobile pass.
• Release preview APKs of main and of this branch were run on an Android 16 x86_64 emulator (1080x2400) against a local server with seeded demo data, opening the draft through "New thread on " so a real checkout happens. On main the native "New task" header is visible above "Switching branch..." until the draft mounts; on this branch it never appears. The final draft renders identically on both.
• The persistent pushed-down draft from the physical-device report did not reproduce on the Android 16 x86_64 emulator in about ten attempts, covering the branch-switch path, project-picker path, cold start, and soft keyboard enabled. The screenshots demonstrate removal of the native header during branch switching; final draft layouts look identical on both builds. Resolution of the persistent physical-device symptom remains unverified.
• Not checked: iOS (unchanged by this diff).

Before (main): loading state	After (this branch): loading state

Before (main): draft	After (this branch): draft

Claude Fable 5.1 via Claude Code in T3 Code, with a GPT-6 Astra review round (reviewer only).

[macroscopeapp]

Approvability

Verdict: Needs Human Approval

Macroscope's review found this PR requires human approval — This is a small Android-only layout fix that hides the inherited native header before the draft route's first layout while preserving the custom Android header and iOS behavior. It also changes the route's default header presentation, so the product-default policy requires human review.

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📥 Commits

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📒 Files selected for processing: 1

• apps/mobile/src/Stack.tsx

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📝 Walkthrough

The NewTaskDraft screen now hides its native header on Android and shows it on other platforms.

Changes: NewTaskDraft header visibility

Layer / File(s)	Summary
Set header visibility by platform apps/mobile/src/Stack.tsx	NewTaskDraft sets headerShown to false on Android and true on other platforms.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Bug fix

Possibly related issues

• Issue 22737 describes an Android NewTaskDraft header offset before the header is hidden. This change sets the header visibility to false on Android.

Suggested reviewers: juliusmarminge

Merge Risk: ⚪ Minimal · up to eaa10

The reported emulator checks show the final draft layout is unchanged, and no concrete regression is established. The original physical-device clipping symptom remains unverified, so this is mergeable with ordinary follow-up.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title clearly and concisely identifies the Android fix: hiding the draft native header before the initial layout.
Description check		The description includes all required sections, explains the problem and implementation, justifies the focused scope, documents verification and limitations, and provides before/after UI evidence.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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[t3dotgg]

Note

🤖 Claude Opus 5.5 responding on behalf of Theo

Thanks for this. Julius has #22742 open with the same fix to the Android draft header in Stack.tsx (#22737), so we are closing this one to keep one fix in review.