fix(mobile): prevent Android transcript clipping crash

[iscekic]

Summary

• disable clipped subviews on the streaming agent transcript FlashList
• avoid the Android Fabric ReactClippingViewManager reattachment path from KILO-APP-25
• add a mounted regression test for the list prop

Verification

• pnpm format
• pnpm typecheck
• pnpm lint
• pnpm test (523 files, 5,335 tests)
• pnpm check:unused
• git diff --check

Fixes KILO-APP-25

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• apps/mobile/src/components/agents/session-message-list.tsx
• apps/mobile/src/components/agents/session-message-list.mounted.test.tsx

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_{Reviewed by grok-4.6 · Input: 84.4K · Output: 7.2K · Cached: 381.4K}

_{Review guidance: REVIEW.md from base branch main}