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>

components/cortex/shared/index.ts

@@ -0,0 +1,21 @@
+/**
+ * Cortex Shared Components
+ *
+ * Reusable components for Cortex blocks.
+ */
+
+// Block States (E0)
+export { BlockLoading, BlockError, BlockEmpty } from './block-states';
+
+// Block Layout (E1)
+export { BlockSection } from './block-section';
+export { BlockItem, getRiskBadgeVariant, type BadgeVariant } from './block-item';
+export { BlockFooter } from './block-footer';
+
+// Patient Components (existing)
+export {
+  PatientListItem,
+  PatientListEmpty,
+  PatientListLoading,
+} from './patient-list-item';
+export { LinkedEvidence } from './linked-evidence';