perf(mobile): sends respond instantly, thread opens stop freezing - #4882

💭 Looking at the diff to see if it involves Effect service changes—mostly mobile performance updates and React code. I'm scanning for Effect-related patterns like thread-outbox-manager and array sorting, checking whether the pull request violates any Effect service conventions, though the promise-based confirmQueued in the manager doesn't seem to raise obvious issues. Let me check a few files like thread-outbox-manager.ts and thread-outbox.ts to be thorough, and I notice useAppShortcuts.ts references Platform—that could be a missing import, which would be a real bug, though it's outside the scope of the Effect service check. I should verify this anyway since it's a concrete issue. Looking at the PR changes, this is focused on mobile performance optimization rather than introducing new Effect service patterns. The existing ThreadOutboxManagerError is legacy code that was already there, so nothing new violates the conventions. I'm checking the use-thread-composer-state modifications to see if mergeComposerDraftContent has the right signature—it's returning void as expected, not a Promise, so that's consistent with the existing patterns. Since the check defaults to failure but I'm finding no violations, this passes. I'll format the response as JSON with "All clear" in the summary.