feat(media): support local and s3 upload providers

apps/admin/src/lib/media/storage.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from "vitest"
+
+import { resolveMediaStorageProvider } from "@/lib/media/storage"
+
+describe("resolveMediaStorageProvider", () => {
+  it("defaults to local when unset", () => {
+    expect(resolveMediaStorageProvider(undefined)).toBe("local")
+  })
+
+  it("resolves s3", () => {
+    expect(resolveMediaStorageProvider("s3")).toBe("s3")
+    expect(resolveMediaStorageProvider("S3")).toBe("s3")
+  })
+
+  it("falls back to local for unknown values", () => {
+    expect(resolveMediaStorageProvider("foo")).toBe("local")
+  })
+})