feat(kesehatan): posyandu banjar relation, redesign halaman publik, fix tips keamanan image

- Tambah model Banjar + relasi ke Posyandu (migration + seeder)
- Update API posyandu (create/update/find) untuk support banjarId
- Tambah endpoint banjar di kesehatan API
- Redesign halaman publik posyandu dengan tabs: ringkasan, data posyandu, balita, ibu hamil
- Update halaman admin posyandu list/create/edit/detail untuk banjar
- Fix image ketukar pada seed tips keamanan
- Hapus seeder core yang sudah tidak dipakai

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

prisma/migrations/20260528100000_add_banjar_to_posyandu/migration.sql

@@ -0,0 +1,16 @@
+-- CreateTable
+CREATE TABLE "Banjar" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Banjar_pkey" PRIMARY KEY ("id")
+);
+
+-- AlterTable
+ALTER TABLE "Posyandu" ADD COLUMN "banjarId" TEXT;
+
+-- AddForeignKey
+ALTER TABLE "Posyandu" ADD CONSTRAINT "Posyandu_banjarId_fkey" FOREIGN KEY ("banjarId") REFERENCES "Banjar"("id") ON DELETE SET NULL ON UPDATE CASCADE;