feat: pgvector similar-incident retrieval + SimilarIncidentsPanel

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FFDuBhMKvoWjrWT3ZnGmmr

app/(protected)/hse/incidents/[id]/page.tsx

@@ -4,6 +4,7 @@ import { notFound } from 'next/navigation'
 import Link from 'next/link'
 import { createClient } from '@/lib/supabase/server'
 import { IncidentDetail, type Incident } from '@/components/incidents/incident-detail'
+import { SimilarIncidentsPanel } from '@/components/incidents/similar-incidents-panel'
 
 interface Props {
   params: Promise<{ id: string }>
@@ -94,6 +95,7 @@ export default async function HseIncidentDetailPage({ params }: Props) {
           </a>
         </div>
       )}
+      <SimilarIncidentsPanel incidentId={id} />
     </main>
   )
 }

app/api/incidents/[id]/similar/route.ts

@@ -0,0 +1,46 @@
+export const dynamic = 'force-dynamic'
+
+import { NextRequest, NextResponse } from 'next/server'
+import { createClient } from '@/lib/supabase/server'
+import { embedText } from '@/lib/claude/embed'
+
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const { id } = await params
+  const supabase = await createClient()
+  const { data: { user }, error: authError } = await supabase.auth.getUser()
+  if (authError || !user) return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+
+  const { data: profile } = await supabase.from('users').select('role').eq('id', user.id).single()
+  if (!profile || !['hse', 'admin'].includes(profile.role))
+    return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+
+  const { data: incident } = await supabase
+    .from('incidents')
+    .select('id, description, embedding')
+    .eq('id', id)
+    .single()
+  if (!incident) return NextResponse.json({ error: 'Not found' }, { status: 404 })
+
+  const inc = incident as { id: string; description: string; embedding: string | null }
+
+  let embeddingVec: number[]
+  if (inc.embedding) {
+    embeddingVec = JSON.parse(inc.embedding) as number[]
+  } else {
+    embeddingVec = await embedText(inc.description)
+    await supabase.from('incidents').update({
+      embedding: `[${embeddingVec.join(',')}]` as unknown as string,
+    }).eq('id', id)
+  }
+
+  const { data: similar } = await supabase.rpc('match_incidents', {
+    query_embedding: `[${embeddingVec.join(',')}]`,
+    exclude_id: id,
+    match_count: 5,
+  })
+
+  return NextResponse.json(similar ?? [])
+}

app/api/incidents/route.ts

@@ -109,5 +109,14 @@ export async function POST(request: Request) {
   sendNewIncidentEmail(incident.id, zone.site_id, incident.reference_no ?? '', input.incident_type)
     .catch(err => console.error('email notification failed:', err))
 
+  // Embed description asynchronously for future similarity search
+  import('@/lib/claude/embed').then(({ embedText }) =>
+    embedText(input.description.trim()).then(embedding =>
+      supabase.from('incidents').update({
+        embedding: `[${embedding.join(',')}]` as unknown as string,
+      }).eq('id', incident.id)
+    )
+  ).catch(err => console.error('embed error:', err))
+
   return NextResponse.json({ id: incident.id, reference_no: incident.reference_no }, { status: 201 })
 }