refactor(mobile): adopt shared interaction semantics

[richardsolomou]

Problem

Mobile still duplicates MCP, skill, permission, composer, session, and inbox presentation behavior after the shared policies have been extracted.

Depends on #3640
Refs PostHog/posthog#76229

Changes

Phase 2: I migrated mobile onto the shared interaction and presentation policies, then removed the replaced mobile implementations. Shared desktop behavior remains unchanged in this PR.

How did you test this?

• Full monorepo typecheck at this checkpoint
• Final stack: 711 shared, 153 API-client, 2,599 core, and 451 mobile tests

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

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Created with PostHog Code

[github-actions]

React Doctor found 1 issue in 1 file · 1 warning.

1 warning

src/features/chat/components/AgentMessage.tsx

• ⚠️ src/features/chat/components/AgentMessage.tsx:113 Time or random value in JSX rendering-hydration-mismatch-time

_{Reviewed by React Doctor for commit 08bacb1.}

[richardsolomou]

• feat(mobile): add Codex task parity #3654
• refactor(mobile): finalize portability boundary #3642
• refactor(mobile): adopt shared interaction semantics #3641 👈 (View in Graphite)
• refactor(mobile): finish shared task and inbox adoption #3640
• refactor(mobile): adopt shared task runtime #3637
• refactor(core): extract shared presentation semantics #3635
• refactor(core): extract permission and composer semantics #3634
• refactor(core): extract repository integration semantics #3633
• refactor(core): extract portable cloud task engine #3608
• refactor(core): rename cloud task service as engine #3624
• refactor(core): extract cloud task policies #3623
• refactor(api-client): extract cloud task transport #3622
• refactor(shared): extract task contracts and model policy #3616
• main

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[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(core): require desktop inbox tab cou..." | Re-trigger Greptile}

[trunk-io]

😎 Merged successfully - details.