Remove tmdbImageUrl mocks to fix cross-file mock poisoning in CI

bun's mock.module persists across test files in the same process,
causing image.test.ts to receive the stub instead of the real
tmdbImageUrl. Since tmdbImageUrl has no heavy runtime dependencies,
service tests work fine with the real implementation.

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

lib/services/credits.test.ts

@@ -2,10 +2,6 @@ import { beforeEach, describe, expect, mock, test } from "bun:test";
 import { persons, titleCast } from "@/lib/db/schema";
 import { clearAllTables, insertTitle, testDb } from "@/lib/test-utils";
 
-mock.module("@/lib/tmdb/image", () => ({
-  tmdbImageUrl: (path: string | null) => path,
-}));
-
 mock.module("./image-cache", () => ({
   imageCacheEnabled: () => false,
   cacheProfilePhotos: async () => {},
@@ -65,7 +61,7 @@ describe("getCastForTitle", () => {
     expect(cast).toHaveLength(2);
     expect(cast[0].name).toBe("Actor One");
     expect(cast[0].character).toBe("Hero");
-    expect(cast[0].profilePath).toBe("/path1.jpg");
+    expect(cast[0].profilePath).toBe("/api/images/profiles/path1.jpg");
     expect(cast[1].name).toBe("Actor Two");
   });
 

lib/services/discovery.test.ts

@@ -1,4 +1,4 @@
-import { beforeEach, describe, expect, mock, test } from "bun:test";
+import { beforeEach, describe, expect, test } from "bun:test";
 import {
   clearAllTables,
   insertAvailabilityOffer,
@@ -12,10 +12,6 @@ import {
   insertUser,
 } from "@/lib/test-utils";
 
-mock.module("@/lib/tmdb/image", () => ({
-  tmdbImageUrl: (path: string | null) => path,
-}));
-
 import {
   getContinueWatchingFeed,
   getNewAvailableFeed,

lib/services/person.test.ts

@@ -1,11 +1,7 @@
-import { beforeEach, describe, expect, mock, test } from "bun:test";
+import { beforeEach, describe, expect, test } from "bun:test";
 import { persons, titleCast } from "@/lib/db/schema";
 import { clearAllTables, insertTitle, testDb } from "@/lib/test-utils";
 
-mock.module("@/lib/tmdb/image", () => ({
-  tmdbImageUrl: (path: string | null) => path,
-}));
-
 import { getLocalFilmography } from "./person";
 
 beforeEach(() => {