refactor(mobile): finalize portability boundary

[richardsolomou]

Problem

Mobile still duplicates canonical MCP, skill, and inbox contracts, and some shared behavior is interpreted differently from desktop. The shared packages also need to run against Expo's React Native renderer and fetch implementation.

Changes

I switched mobile to the API-client and core contracts already used by desktop, sharing only inbox labels and attribution consumed by both renderers. Mobile-specific MCP, diff, and native UI presentation stays in mobile. I also aligned React with the renderer embedded by React Native 0.81 and normalized URL inputs at the Expo fetch boundary.

How did you test this?

• Full monorepo typecheck from the commit hook
• Core suite: 2,578 tests
• API-client suite: 129 tests
• Mobile suite: 405 tests
• UI and web typechecks
• Biome on changed core and mobile files
• Host-boundary check
• Signed iOS simulator build on Xcode 26.6
• Dev PHX authentication against project 2, including live task-list and task-stream loading

Automatic notifications

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

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Created with PostHog Code

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 498fc78.}

[richardsolomou]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat(mobile): add Codex task parity #3654
• refactor(mobile): finalize portability boundary #3642 👈 (View in Graphite)
• refactor(mobile): reuse inbox semantics #3641
• refactor(mobile): reuse session display semantics #3640
• refactor(core): own composer model policy #3637
• refactor(mobile): reuse transport and permission policies #3635
• refactor(mobile): reuse inbox transport #3634
• refactor(mobile): reuse repository aggregation #3633
• refactor(mobile): finish shared cloud task adoption #3608
• refactor(mobile): reuse the cloud task engine #3624
• refactor(mobile): reuse core task policies #3623
• refactor(mobile): reuse the task API client #3622
• refactor(mobile): reuse task contracts and model policy #3616
• main

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[greptile-apps]

_{Reviews (1): Last reviewed commit: "Merge posthog-code/share-inbox-automatio..." | Re-trigger Greptile}