chore(js-ts): Convert SettingsNotification, AssetList to TypeScript

[devin-ai-integration]

Summary

Part of Workstream 2 (Base & UI component JS→TS migration). Converts two presentational UI components from JS to TS. Type-only changes — snapshots identical.

• app/components/UI/SettingsNotification/index.js → .tsx
• app/components/UI/AssetList/index.js → .tsx

Worth knowing (rest is mechanical PropTypes→interface):

• SettingsNotification: the old defaultProps (style = {}, isWarning = false) are moved to destructured default params. An unused isHighlighted default (no matching prop / usage) is dropped. Object.assign({}, styles.menuItemWarning, style) casts style as ViewStyle since StyleProp<ViewStyle> isn't a plain object.
• AssetList: handleSelectAsset is typed ((asset: Asset) => void) | null because its .test.tsx passes handleSelectAsset={null}; call sites use optional chaining handleSelectAsset?.(...) (only reachable on press, never with the null test case, so snapshot is unchanged). searchQuery?.length guards the optional prop. logo={iconUrl as string} at the AssetIcon boundary preserves the previous runtime (passing undefined through — AssetIcon returns null for falsy logo).

Validation (local)

• yarn lint:tsc: passes, 0 errors.
• eslint on both files: clean (no any).
• yarn jest (SettingsNotification, AssetList): 2 suites pass, 3 snapshots identical.

CI note

The install-gated CI jobs on this fork fail before reaching any TS/test step due to a preexisting broken dependency (react-native-tcp pins a GitHub commit that now 404s on yarn install); check-diff/CLABot/label checks also fail on all fork PRs for preexisting infra/governance reasons (ruby/setup-ruby detects the macOS runner as self-hosted). None are caused by this diff, which contains only file renames + type annotations and no lockfile change.

Link to Devin session: https://app.devin.ai/sessions/a0f7f796d1fb45e88b2feabe5829a4ac
Requested by: @WesternConcrete

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