feat(kesehatan): tambah relasi banjar ke penderita penyakit dan CRUD banjar admin

- Tambah field banjarId (optional) ke GrafikKepuasan + migration
- API CRUD banjar baru di /api/desa/banjar/*
- Update API grafik_kepuasan: create, find-many (filter by banjar), findUnique, updt - semua include banjar
- State: tambah banjarId ke form, banjarList proxy, filter by banjarId
- UI list: kolom Banjar di tabel desktop, kartu mobile, Select filter by banjar
- UI create/edit: Select banjar (opsional), load banjarList on mount
- UI detail: tampilkan field Banjar
- Admin banjar: halaman list, create, detail
- Sidebar: menu Banjar di domain Desa

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

prisma/schema.prisma

@@ -1050,6 +1050,8 @@ model GrafikKepuasan {
   jenisKelamin String
   alamat       String
   penyakit     String
+  banjar       Banjar?  @relation(fields: [banjarId], references: [id])
+  banjarId     String?
   createdAt    DateTime @default(now())
   updatedAt    DateTime @updatedAt
   deletedAt    DateTime @default(now())
@@ -1152,12 +1154,13 @@ model DoctorSign {
 
 // ========================================= BANJAR ========================================= //
 model Banjar {
-  id        String     @id @default(cuid())
-  name      String
-  isActive  Boolean    @default(true)
-  createdAt DateTime   @default(now())
-  updatedAt DateTime   @updatedAt
-  posyandus Posyandu[]
+  id               String           @id @default(cuid())
+  name             String
+  isActive         Boolean          @default(true)
+  createdAt        DateTime         @default(now())
+  updatedAt        DateTime         @updatedAt
+  posyandus        Posyandu[]
+  grafikKepuasans  GrafikKepuasan[]
 }
 
 // ========================================= POSYANDU ========================================= //