feat(mobile): add a Clear filters action to the thread list menu

[none23]

What Changed

• Add a "Clear filters" action in its own group at the end of the thread filter menu. It resets the environment and project filters at once.
• Show it only while a filter is active, on every menu surface: Android home header, iOS toolbar and pre-Liquid-Glass bottom toolbar, and the split-view sidebar. iOS renders it after a divider; Android has no divider primitive, so it is the last item.

Why

After selecting an environment or project, returning to the full list requires opening each submenu and resetting the selections separately. One action fixes that. It sits at the end of the menu, where iOS puts reset actions, so the submenus keep stable positions whether or not a filter is active.

UI Changes

Android, filtered to one project on a test server.

Active filters

Before	After

Inactive filters

Before	After

Video

Applying a project filter, then resetting it with Clear filters: pr9216-android-clear-filters.mp4

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

Built with Claude Fable 5.1 in Claude Code.

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Note

Low Risk
Localized mobile UI and list-filter state; no auth, data, or API changes.

Overview
Makes environment and project scope on the mobile thread list easier to see and reset, without touching sort/group preferences.

Introduces hasActiveHomeListFilters so “active filter” means narrowed environment or project scope only (sort order stays a preference). Thread List v2 uses that for the filled filter button instead of treating custom sort as “filtered.” Android maps the filled SF symbol to IconFilterFilled so the active state is visually distinct.

When filters are active, Clear filters appears at the top of the filter menu (shared buildHomeListFilterMenu, Home Android/iOS header, and thread navigation sidebar), resetting both scopes in one action. Unit tests cover the helper and conditional menu item.

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Note

Add Clear filters action to mobile thread list menus

• Adds a Clear filters menu item to the Android, iOS, and sidebar thread list menus that resets active environment and project scopes.
• Introduces hasActiveHomeListFilters to detect active scopes, driving the clear action visibility and the customized-filter indicator.
• Fixes AppSymbol mapping to use the filled Tabler filter icon for the filled SFSymbol variant.
• Behavioral Change: The v2 customized-filter indicator now only reflects environment and project scopes, not sort-order preferences.

^{Macroscope summarized f60f590. (Automatic summaries will resume when PR exits draft mode or review begins).}

Summary by CodeRabbit

• New Features
  • Added a Clear filters action to the home screen menus and thread navigation sidebar.
  • The action appears when an environment or project filter is active and resets both selections.
  • Clear filters is available in both Android and iOS menu presentations.
  • Updated menu presentation to display the action inline where appropriate.
  • The action is not shown when neither an environment nor a project filter is selected.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR adds a focused Clear filters action across mobile thread-list menus, but the iOS Liquid Glass path may render the new action as an empty nested submenu because its inline grouping metadata is not propagated. Human verification is warranted for that platform-specific behavior.

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📥 Commits

Reviewing files that changed from the base of the PR and between a112b80 and e71a3f2.

📒 Files selected for processing (6)

• apps/mobile/src/features/home/HomeHeader.android.tsx
• apps/mobile/src/features/home/HomeHeader.tsx
• apps/mobile/src/features/home/home-list-filter-menu.test.ts
• apps/mobile/src/features/home/home-list-filter-menu.ts
• apps/mobile/src/features/threads/ThreadNavigationSidebar.tsx
• apps/mobile/src/features/threads/sidebar-native-header-items.ts

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📝 Walkthrough

Walkthrough

The mobile home and thread menus now show “Clear filters” when an environment or project filter is active. Selecting the action clears both selections. Native sidebar headers preserve inline submenu presentation, and tests cover the filter-menu reset behavior.

Changes

Filter clearing

Layer / File(s)	Summary
Filter menu contract and behavior apps/mobile/src/features/home/home-list-filter-menu.ts, apps/mobile/src/features/home/home-list-filter-menu.test.ts	The menu supports inline submenus, detects active scope filters, appends a “Clear filters” action, and tests both reset callbacks.
Home header filter actions apps/mobile/src/features/home/HomeHeader.android.tsx, apps/mobile/src/features/home/HomeHeader.tsx	Both home headers use the active-filter helper and conditionally show “Clear filters.” Selecting the action clears the environment and project selections.
Thread sidebar integration apps/mobile/src/features/threads/ThreadNavigationSidebar.tsx, apps/mobile/src/features/threads/sidebar-native-header-items.ts	The thread sidebar adds and handles the clear action. Native header conversion preserves inline submenu presentation.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Suggested reviewers: juliusmarminge

Merge Risk: ⚪ Minimal · up to e71a3

Environment-only and project-only filters both expose a clear action that resets both selections across the updated mobile interfaces. The change is ready to merge.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 6 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the main change: adding a Clear filters action to the mobile thread list menu.
Description check	✅ Passed	The description includes all required sections, explains the change and rationale, documents UI changes with before-and-after screenshots and a video, and completes the checklist.

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Actionable comments posted: 1

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Inline comments:
In `@apps/mobile/src/features/home/home-list-filter-menu.test.ts`:
- Around line 44-75: Extend the “buildHomeListFilterMenu clear action” tests
with an environment-only selection case, using a non-null selectedEnvironmentId
and null project selection. Verify the top-level inline “Clear filters” action
is rendered and invoking it calls both onEnvironmentChange(null) and
onProjectChange(null), covering the environment branch of
hasActiveHomeListFilters.

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📥 Commits

Reviewing files that changed from the base of the PR and between 9375c77 and a112b80.

📒 Files selected for processing (5)

• apps/mobile/src/features/home/HomeHeader.tsx
• apps/mobile/src/features/home/home-list-filter-menu.test.ts
• apps/mobile/src/features/home/home-list-filter-menu.ts
• apps/mobile/src/features/threads/ThreadNavigationSidebar.tsx
• apps/mobile/src/features/threads/sidebar-native-header-items.ts

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[none23]

COMMENT FROM claude-fable-5-1

Re the Approvability note about the iOS Liquid Glass path: the inline grouping does reach the native menu.

• buildHomeListFilterMenu sets displayInline: true. That is react-native-screens' own submenu field, not a custom one.
• prepareMenu spreads each submenu as-is into the mailSearchToolbar filterMenu.
• The glass filter button builds its menu with RNSBarButtonItem initUIMenuWithDict, which maps displayInline to UIMenuOptionsDisplayInline.

So on iOS 26 Clear filters renders as a divider-separated trailing group, not an empty nested submenu. Only the sidebar path needs a mapping to inline, and that is in sidebar-native-header-items.ts.