[Feature][Mobile] Copy thread ID, branch, and path from thread menus (desktop parity)

Description

The T3 Code mobile app has no visible way to copy a thread's ID, branch, or workspace path, while the desktop/web app does.

Desktop/web exposes a per-thread Copy submenu in both the sidebar row right-click menu and the chat header menu (buildThreadActionMenuItems in apps/web/src/components/threadActionMenu.logic.ts):

• Copy Path (workspace path, falls back to project cwd)
• Copy Branch (when the thread has a branch)
• Copy Thread ID (always)

plus a separate PR-link-or-thread-ID shortcut via resolveThreadReferenceCopyTarget (packages/shared/src/threadReference.ts, wired in ChatView.tsx / command palette).

On mobile (React Native client):

• Thread row long-press menus (ThreadListRow in apps/mobile/src/features/threads/thread-list-items.tsx, ThreadListV2Row in thread-list-v2-items.tsx) offer only lifecycle/title actions (Archive/Settle/Snooze/Pin/Regenerate/Delete, plus New-thread-on-branch) — no Copy submenu.
• The only copy path is the hardware-keyboard shortcut in HardwareKeyboardCommandProvider.tsx (copyThreadReference), which is invisible on touch devices.

Expected behavior

• Add a Copy submenu to the mobile thread row long-press menus (both v1 and v2 lists), mirroring desktop ordering/labels:
  • Path (worktree path, falling back to project workspace root where available; error feedback when unavailable, like desktop's "Path unavailable")
  • Branch (only when the thread has one)
  • Thread ID (always)
• Use the existing copyTextWithHaptic helper with failure feedback, matching other mobile copy surfaces.
• Add the missing number SF Symbol Android mapping (Tabler Hash) so the Thread ID row has an icon on Android, as the prior full-parity attempt did.

Related reports and changes

• Desktop origin: feat(web) add Copy Thread ID to the sidebar and chat header thread context menu (#5574, merged)
• Mobile full-parity attempt (included this Copy submenu, closed unmerged as too large): feat(mobile) Bring Thread Menus to Desktop Parity (#5962, closed)
• SwiftUI-only equivalent (does not cover the React Native client): feat(swift-ios) copy thread metadata from row menus (#8622, merged)
• Adjacent mobile parity gap: [Bug][Mobile] Archive action is missing from thread actions (#9328, open)
• Hardware-keyboard-only copy on mobile: apps/mobile/src/features/keyboard/HardwareKeyboardCommandProvider.tsx

Acceptance criteria

• A mobile user can long-press a thread row and copy its Thread ID.
• Branch and Path are copyable from the same submenu under the same conditions as desktop.
• Missing-path and clipboard-failure cases surface an error instead of silently doing nothing.
• Existing Archive/Delete/Settle/Snooze/Pin/Regenerate behavior does not regress.

Start with buildThreadActionMenuItems in apps/web/src/components/threadActionMenu.logic.ts, then inspect ThreadListRow and ThreadListV2Row in apps/mobile/src/features/threads and the existing copyTextWithHaptic usage. Add the mobile Copy submenu and number SF Symbol mapping, preserving current actions; done means touch users can copy path, branch, or thread ID with the specified availability and error feedback.