refactor(media): unify use-case I/O schemas + presenter + feature error map

Per Plan 9 (spec R1-R28):
- Use cases: input + output schemas (getMedia, listMedia); deleteMedia
  has input schema only (void output, R12 — no presenter).
- Controllers: unknown input + identity presenter on getMedia/listMedia;
  Promise<void> on deleteMedia.
- New integrations/api/procedures.ts with mediaProcedure
  ([InputParseError → BAD_REQUEST], [MediaNotFoundError → NOT_FOUND]).
- Router uses mediaProcedure + .input(xInputSchema).
- src/index.ts exports schemas + types; src/ui/index.ts placeholder
  (media has no queries today); package.json adds ./ui subpath.
- R25 + R26 tests added.

Refactor log: §1, §2, §3.1, §3.2, §3.3, §5.1, §5.2, §6.1, §6.2
Spec: R1–R6, R8–R15, R18–R20, R22–R26

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/media/src/application/use-cases/get-media.use-case.test.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect } from "vitest";
-import { getMediaUseCase } from "@/application/use-cases/get-media.use-case";
+import { ZodError } from "zod";
+import { getMediaUseCase, getMediaOutputSchema } from "@/application/use-cases/get-media.use-case";
 import { MockMediaRepository } from "@/infrastructure/repositories/media.repository.mock";
 import { MediaNotFoundError } from "@/entities/errors/media";
 import { mediaFactory } from "@/__factories__/media.factory";
@@ -23,4 +24,18 @@ describe("getMediaUseCase", () => {
 
     await expect(useCase({ id: "missing" })).rejects.toThrow(MediaNotFoundError);
   });
+
+  it("R25 — parses valid output without error", async () => {
+    const validMedia = mediaFactory.build({ id: "m-r25" });
+    expect(() => getMediaOutputSchema.parse(validMedia)).not.toThrow();
+  });
+
+  it("R25 — throws ZodError when repository returns malformed media", async () => {
+    const repo = new MockMediaRepository();
+    // Store a malformed object (missing required fields) via type cast
+    await repo._store({ id: "bad", alt: "alt", url: "u" } as never);
+
+    const useCase = getMediaUseCase(repo);
+    await expect(useCase({ id: "bad" })).rejects.toBeInstanceOf(ZodError);
+  });
 });