Implements the five section components consumed by the HQ page:
- HQWaitingForInputSection, HQNeedsReviewSection, HQNeedsApprovalSection,
HQBlockedSection, HQEmptyState with typed props from RouterOutputs.
- Shared types.ts defines the 5 item types from getHeadquartersDashboard.
- Adds RouterOutputs export to trpc.ts via inferRouterOutputs<AppRouter>.
- 22 unit tests verify rendering, navigation CTAs, truncation, and edge cases.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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