feat(storage): complete phase 3 branding foundation

server/repositories/branding.ts

@@ -0,0 +1,13 @@
+import { eq } from "drizzle-orm";
+import { instanceBranding } from "../db/schema/storage";
+import type { DomainDatabase } from "../domain/database";
+
+export function createBrandingRepository(db: DomainDatabase) {
+  return {
+    get: () => db.select().from(instanceBranding).where(eq(instanceBranding.id, "default")).get(),
+    create: (value: typeof instanceBranding.$inferInsert) =>
+      db.insert(instanceBranding).values(value).returning().get(),
+    update: (value: Partial<typeof instanceBranding.$inferInsert>) =>
+      db.update(instanceBranding).set(value).where(eq(instanceBranding.id, "default")).returning().get(),
+  };
+}