feat(health): emergency vet with OSM search and map

- EmergencyVet model: name, address, phone, website, lat, lng (1:1 to Pet)
- health router: getEmergencyVet, setEmergencyVet, deleteEmergencyVet
- EmergencyVetSection: Nominatim search (debounced 500ms, OSM attribution),
  result dropdown auto-fills address + coordinates, manual override for all fields
- OSM iframe map (no API key) with "In Karte öffnen" link; shown in edit
  mode as coordinate preview and in view mode after save
- Health card (public): red-accented emergency vet block with phone link,
  website link and OSM map; map hidden on print (print:hidden)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/trpc/routers/health.ts

@@ -132,6 +132,43 @@ export const healthRouter = router({
       return { success: true };
     }),
 
+  // ── Emergency Vet ────────────────────────────────────────────────────────────
+
+  getEmergencyVet: protectedProcedure
+    .input(z.object({ petId: z.string().min(1) }))
+    .query(async ({ ctx, input }) => {
+      await assertOwner(ctx.prisma, input.petId, ctx.userId);
+      return ctx.prisma.emergencyVet.findUnique({ where: { petId: input.petId } });
+    }),
+
+  setEmergencyVet: protectedProcedure
+    .input(z.object({
+      petId: z.string().min(1),
+      name: z.string().min(1).max(150),
+      address: z.string().max(300).optional().nullable(),
+      phone: z.string().max(30).optional().nullable(),
+      website: z.string().max(200).optional().nullable(),
+      lat: z.number().optional().nullable(),
+      lng: z.number().optional().nullable(),
+    }))
+    .mutation(async ({ ctx, input }) => {
+      await assertOwner(ctx.prisma, input.petId, ctx.userId);
+      const { petId, ...data } = input;
+      return ctx.prisma.emergencyVet.upsert({
+        where: { petId },
+        update: data,
+        create: { petId, ...data },
+      });
+    }),
+
+  deleteEmergencyVet: protectedProcedure
+    .input(z.object({ petId: z.string().min(1) }))
+    .mutation(async ({ ctx, input }) => {
+      await assertOwner(ctx.prisma, input.petId, ctx.userId);
+      await ctx.prisma.emergencyVet.deleteMany({ where: { petId: input.petId } });
+      return { success: true };
+    }),
+
   // ── Health Card ──────────────────────────────────────────────────────────────
 
   getOrCreateCard: protectedProcedure