refactor(mobile): finish shared cloud task adoption

[richardsolomou]

Problem

After the shared contracts, transport, policies, and session engine are adopted, mobile still has static model configuration and several inbox, task API, parsing, and type wrappers around those packages.

Depends on #3624
Refs #2416

Changes

I switched mobile to the authenticated live model catalog and shared configuration policy, moved the remaining inbox consumers onto canonical contracts, and removed the residual task API, prompt, parser, and type wrappers. This PR contains the final mobile/UI adoption only; the reusable logic lives in the prerequisite PRs.

How did you test this?

• Ran 2,622 core tests, the core typecheck, and 343 mobile tests.
• Ran Biome and host-boundary checks.
• Exported the production iOS Expo bundle.

Automatic notifications

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

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[github-actions]

React Doctor found 10 issues in 2 files · 10 warnings.

10 warnings

src/app/task/index.tsx

• ⚠️ src/app/task/index.tsx:217 Event logic handled in an effect no-event-handler
• ⚠️ src/app/task/index.tsx:219 Derived value copied into state no-derived-state
• ⚠️ src/app/task/index.tsx:220 Event logic handled in an effect no-event-handler
• ⚠️ src/app/task/index.tsx:221 State updates chained through effects no-chain-state-updates

src/features/tasks/composer/TaskChatComposer.tsx

• ⚠️ src/features/tasks/composer/TaskChatComposer.tsx:209 Event logic handled in an effect no-event-handler
• ⚠️ src/features/tasks/composer/TaskChatComposer.tsx:211 Data passed to parent via effect no-pass-data-to-parent
• ⚠️ src/features/tasks/composer/TaskChatComposer.tsx:211 Parent kept in sync with a callback effect no-prop-callback-in-effect
• ⚠️ src/features/tasks/composer/TaskChatComposer.tsx:212 Event logic handled in an effect no-event-handler
• ⚠️ src/features/tasks/composer/TaskChatComposer.tsx:213 Data passed to parent via effect no-pass-data-to-parent
• ⚠️ src/features/tasks/composer/TaskChatComposer.tsx:213 Parent kept in sync with a callback effect no-prop-callback-in-effect

_{Reviewed by React Doctor for commit 70e84e9.}