feat: API key settings page — store ANTHROPIC/VOYAGE keys in DB with admin UI

- Migration: app_settings table with admin-only RLS (ANTHROPIC_API_KEY, VOYAGE_API_KEY)
- lib/settings.ts: getApiKey() reads DB first, falls back to env var
- lib/claude/client.ts: factory createAnthropicClient(apiKey) replaces singleton
- lib/claude/embed.ts: optional apiKey param, falls back to env
- 3 Claude AI routes + similar route: fetch key from settings before calling AI
- incidents/route.ts: fire-and-forget embed reads VOYAGE key from settings
- GET/POST /api/settings: admin-only masked key management endpoint
- /hse/settings page + ApiKeyForm client component

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

app/api/incidents/[id]/ai/rca-draft/route.ts

@@ -2,7 +2,8 @@ export const dynamic = 'force-dynamic'
 
 import { NextRequest, NextResponse } from 'next/server'
 import { createClient } from '@/lib/supabase/server'
-import { anthropic } from '@/lib/claude/client'
+import { createAnthropicClient } from '@/lib/claude/client'
+import { getApiKey } from '@/lib/settings'
 
 export async function POST(
   _request: NextRequest,
@@ -17,6 +18,9 @@ export async function POST(
   if (!profile || !['hse', 'admin'].includes(profile.role))
     return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
 
+  const anthropicKey = await getApiKey(supabase, 'ANTHROPIC_API_KEY')
+  const anthropic = createAnthropicClient(anthropicKey)
+
   const { data: incident } = await supabase
     .from('incidents')
     .select(`

app/api/incidents/[id]/ai/triage-suggest/route.ts

@@ -2,7 +2,8 @@ export const dynamic = 'force-dynamic'
 
 import { NextRequest, NextResponse } from 'next/server'
 import { createClient } from '@/lib/supabase/server'
-import { anthropic } from '@/lib/claude/client'
+import { createAnthropicClient } from '@/lib/claude/client'
+import { getApiKey } from '@/lib/settings'
 
 export async function POST(
   _request: NextRequest,
@@ -17,6 +18,9 @@ export async function POST(
   if (!profile || !['hse', 'admin'].includes(profile.role))
     return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
 
+  const anthropicKey = await getApiKey(supabase, 'ANTHROPIC_API_KEY')
+  const anthropic = createAnthropicClient(anthropicKey)
+
   const { data: incident } = await supabase
     .from('incidents')
     .select('id, incident_type, description, injury_involved, asset_involved, medical_status')

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

@@ -3,6 +3,7 @@ export const dynamic = 'force-dynamic'
 import { NextRequest, NextResponse } from 'next/server'
 import { createClient } from '@/lib/supabase/server'
 import { embedText } from '@/lib/claude/embed'
+import { getApiKey } from '@/lib/settings'
 
 export async function GET(
   _request: NextRequest,
@@ -17,6 +18,8 @@ export async function GET(
   if (!profile || !['hse', 'admin'].includes(profile.role))
     return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
 
+  const voyageKey = await getApiKey(supabase, 'VOYAGE_API_KEY')
+
   const { data: incident } = await supabase
     .from('incidents')
     .select('id, description, embedding')
@@ -31,7 +34,7 @@ export async function GET(
     if (inc.embedding) {
       embeddingVec = JSON.parse(inc.embedding) as number[]
     } else {
-      embeddingVec = await embedText(inc.description)
+      embeddingVec = await embedText(inc.description, voyageKey)
       await supabase.from('incidents').update({
         embedding: `[${embeddingVec.join(',')}]` as unknown as string,
       }).eq('id', id)

app/api/incidents/ai/quality-check/route.ts

@@ -2,13 +2,17 @@ export const dynamic = 'force-dynamic'
 
 import { NextRequest, NextResponse } from 'next/server'
 import { createClient } from '@/lib/supabase/server'
-import { anthropic } from '@/lib/claude/client'
+import { createAnthropicClient } from '@/lib/claude/client'
+import { getApiKey } from '@/lib/settings'
 
 export async function POST(request: NextRequest) {
   const supabase = await createClient()
   const { data: { user }, error: authError } = await supabase.auth.getUser()
   if (authError || !user) return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
 
+  const anthropicKey = await getApiKey(supabase, 'ANTHROPIC_API_KEY')
+  const anthropic = createAnthropicClient(anthropicKey)
+
   let body: { description?: string; incident_type?: string }
   try {
     body = await request.json()

app/api/incidents/route.ts

@@ -110,11 +110,16 @@ export async function POST(request: Request) {
     .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: `[${embedding.join(',')}]` as unknown as string,
-      }).eq('id', incident.id)
+  const supabaseForEmbed = supabase
+  import('@/lib/settings').then(({ getApiKey }) =>
+    getApiKey(supabaseForEmbed, 'VOYAGE_API_KEY').then(voyageKey =>
+      import('@/lib/claude/embed').then(({ embedText }) =>
+        embedText(input.description.trim(), voyageKey).then(embedding =>
+          supabase.from('incidents').update({
+            embedding: `[${embedding.join(',')}]` as unknown as string,
+          }).eq('id', incident.id)
+        )
+      )
     )
   ).catch(err => console.error('embed error:', err))