fix(mobile): expose thread rows and project picker rows to accessibility (#152)

[rynfar]

Closes #152

Root Cause

1. Thread rows (Home and Sidebar):
   Rows are wrapped in <ControlPillMenu shouldOpenOnLongPress>, which renders @react-native-menu/menu's ThemedMenuView (MenuViewImplementation: UIButton). In iOS UIKit, UIButton initializes with isAccessibilityElement = YES by default. Under React Native Fabric, RCTViewComponentView.mm evaluates self.contentView.isAccessibilityElement, which returned YES for the menu overlay button without an accessibility label. In UIKit, marking a view as an accessibility element causes the accessibility engine to treat it as a leaf element, completely ignoring and hiding all child views (the row Pressables, thread title text, labels, and badges) from VoiceOver and accessibility inspection.
2. Project picker rows (NewTaskRouteScreen):
   Project rows in the "Choose project" sheet rendered a bare Pressable without accessibility role, label, or state attributes. The iOS toolbar "Add project" button and empty-state buttons were also missing accessibility labels/roles.

Fix

• Updated @react-native-menu/menu iOS patch (MenuViewImplementation.swift) to set self.isAccessibilityElement = !shouldOpenOnLongPress alongside self.isUserInteractionEnabled = !shouldOpenOnLongPress. In long-press mode, the overlay button is excluded from the accessibility tree, allowing VoiceOver to traverse into the wrapped child views.
• Updated NewTaskRouteScreen project picker rows to configure accessible, accessibilityRole="button", accessibilityLabel (via getProjectScopeAccessibilityLabel), and accessibilityState={{ disabled }}.
• Added accessibility labels and roles to the "Add project" header button and empty-state action buttons.
• Added unit tests for getProjectScopeAccessibilityLabel.

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Project	Deployment	Actions	Updated
pylon-marketing	Ready	Preview	Sep 21, 2026 9:54pm UTC

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Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	14.0 KiB	14.0 KiB	+13 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.2 KiB	7.2 KiB	−12 B (−0.2%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.7 KiB	6.8 KiB	+25 B (+0.4%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	58.0 KiB	58.0 KiB	+44 B (+0.1%)	66.4 KiB	✅
Codex	Live turn messages	9	10	+1 (+11.1%)	21	✅
Claude	Total thread wire	13.9 KiB	13.9 KiB	−27 B (−0.2%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.2 KiB	7.2 KiB	0 B (0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.7 KiB	6.7 KiB	−27 B (−0.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.9 KiB	58.8 KiB	−44 B (−0.1%)	66.4 KiB	✅
Claude	Live turn messages	9	8	−1 (−11.1%)	21	✅

Baseline: d93a127 · PR result: 6872486 · 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: 115.6 KiB
• Claude decoded thread snapshot: 116.3 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.