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/list-media.use-case.ts

@@ -1,10 +1,27 @@
-import type { Media } from "../../entities/models/media";
+import { z } from "zod";
+
+import { mediaSchema } from "../../entities/models/media";
 import type { IMediaRepository } from "../repositories/media.repository.interface";
 
+// ── Input ────────────────────────────────────────────────────────────────
+export const listMediaInputSchema = z
+  .object({
+    limit: z.number().int().positive().optional(),
+    offset: z.number().int().nonnegative().optional(),
+  })
+  .strict();
+export type ListMediaInput = z.infer<typeof listMediaInputSchema>;
+
+// ── Output ───────────────────────────────────────────────────────────────
+export const listMediaOutputSchema = z.array(mediaSchema);
+export type ListMediaOutput = z.infer<typeof listMediaOutputSchema>;
+
+// ── Use case ─────────────────────────────────────────────────────────────
 export type IListMediaUseCase = ReturnType<typeof listMediaUseCase>;
 
 export const listMediaUseCase =
   (mediaRepository: IMediaRepository) =>
-  async (opts?: { limit?: number; offset?: number }): Promise<Media[]> => {
-    return mediaRepository.listMedia(opts);
+  async (input: ListMediaInput): Promise<ListMediaOutput> => {
+    const result = await mediaRepository.listMedia(input);
+    return listMediaOutputSchema.parse(result);
   };