feat(cortex): add Intake Blocks MVP for voice/text commands

Adds 4 new intents for intake workflow:
- intake_status: shows completion percentage and section checklist
- intake_navigeer: navigation to specific intake tabs
- risico_query: displays risk assessments with severity indicators
- diagnose_query: shows primary/secondary diagnoses

New components:
- IntakeStatusBlock, RisicoBlock, DiagnoseBlock
- Shared block components (BlockLoading, BlockError, BlockEmpty, BlockSection, BlockItem, BlockFooter)
- useBlockData and useIntakeContext hooks

New API routes:
- GET /api/cortex/intake/status
- GET /api/cortex/intake/risico
- GET /api/cortex/intake/diagnose

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/cortex/hooks/index.ts

@@ -4,5 +4,10 @@
  * Reusable hooks for Cortex functionality.
  */
 
+// Patient hooks
 export { usePatientSearch, type PatientSearchResult } from './use-patient-search';
 export { usePatientSelection } from './use-patient-selection';
+
+// Block hooks (E2)
+export { useBlockData } from './use-block-data';
+export { useIntakeContext, type IntakePrefillData } from './use-intake-context';