feat(agenda): Epic 4 - EPD Koppeling (appointment-report integration)

Implements bidirectional linking between appointments and reports:
- E4.S1: Create report from appointment modal with encounter pre-linked
- E4.S2: Link existing reports to appointments via EncounterSelector
- E4.S3: Show linked reports in appointment modal edit view
- E4.S4: Navigation between appointments and reports with deep linking

Also includes bug fixes for patient search:
- Fix FHIR to internal format mapping for patient data
- Fix debounced search interference after patient selection
- Fix UUID handling for optional practitioner_id

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/api/reports/route.ts

@@ -81,7 +81,7 @@ export async function POST(request: NextRequest) {
       );
     }
 
-    const { patient_id, type, content, ai_confidence, ai_reasoning } = result.data;
+    const { patient_id, type, content, ai_confidence, ai_reasoning, encounter_id, intake_id } = result.data;
     const { data, error } = await supabase
       .from('reports')
       .insert({
@@ -90,6 +90,8 @@ export async function POST(request: NextRequest) {
         content,
         ai_confidence,
         ai_reasoning,
+        encounter_id,
+        intake_id,
         created_by: authData.user.id,
       })
       .select('*')