feat(stats): add TMDB metadata for live-action dramas in the Library

Anime covers come from AniList, which has no live-action titles, so dramas
and movies showed blank cards with no description and split across season
folders. Library entries now carry a media kind plus a TMDB link, and the
cover-art fetcher falls back to TMDB when AniList has no match, accepting
only a Japanese non-animated title whose TMDB names match the parsed title
exactly. Entries that resolve to the same TMDB title merge into one card
regardless of season, and a Link to TMDB action in the detail view covers
anything the automatic match missed.

Release builds bundle a project-owned TMDB key injected from the
SUBMINER_TMDB_API_KEY secret at build time; tmdb.apiKey/apiKeyCommand
override it and are required when running from source.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

scripts/bundled-integration-keys.test.ts

@@ -0,0 +1,39 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import test from 'node:test';
+import {
+  BUNDLED_INTEGRATION_KEYS_FILENAME,
+  stageBundledIntegrationKeys,
+} from './bundled-integration-keys.mjs';
+
+function withDistDir(work: (distDir: string) => void): void {
+  const distDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-bundled-keys-'));
+  try {
+    work(distDir);
+  } finally {
+    fs.rmSync(distDir, { recursive: true, force: true });
+  }
+}
+
+test('stageBundledIntegrationKeys writes the TMDB key from the environment', () => {
+  withDistDir((distDir) => {
+    const staged = stageBundledIntegrationKeys(distDir, { SUBMINER_TMDB_API_KEY: ' abc123 ' });
+    assert.deepEqual(staged, ['tmdb']);
+    const written = JSON.parse(
+      fs.readFileSync(path.join(distDir, BUNDLED_INTEGRATION_KEYS_FILENAME), 'utf8'),
+    );
+    assert.deepEqual(written, { tmdbApiKey: 'abc123' });
+  });
+});
+
+test('stageBundledIntegrationKeys removes a stale file when the variable is unset', () => {
+  withDistDir((distDir) => {
+    const outputPath = path.join(distDir, BUNDLED_INTEGRATION_KEYS_FILENAME);
+    fs.writeFileSync(outputPath, '{"tmdbApiKey":"old"}');
+    assert.deepEqual(stageBundledIntegrationKeys(distDir, {}), []);
+    assert.equal(fs.existsSync(outputPath), false);
+    assert.deepEqual(stageBundledIntegrationKeys(distDir, { SUBMINER_TMDB_API_KEY: '  ' }), []);
+  });
+});