fix(character-dictionary): normalize fallback titles and wire close button

- Trim blank fallback titles in toAniListMediaCandidate; fall back to
  \"AniList <id>\" when all title fields and the fallback string are empty
- Add fetch unit test covering the trimmed-fallback path
- Extract wireDomEvents from createCharacterDictionaryModal so event
  listeners are bound explicitly after construction
- Call wireDomEvents in renderer init alongside other modal wiring
- Extend modal test to cover close-button click dismissing the modal

src/main/character-dictionary-runtime/fetch.test.ts

@@ -0,0 +1,29 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { searchAniListMediaCandidates } from './fetch';
+
+test('searchAniListMediaCandidates trims fallback candidate titles', async () => {
+  const previousFetch = globalThis.fetch;
+  Object.defineProperty(globalThis, 'fetch', {
+    configurable: true,
+    value: async () =>
+      new Response(
+        JSON.stringify({
+          data: {
+            Page: {
+              media: [{ id: 21355, episodes: 25, title: {} }],
+            },
+          },
+        }),
+      ),
+  });
+
+  try {
+    const candidates = await searchAniListMediaCandidates('  Re:ZERO  ');
+
+    assert.equal(candidates[0]?.title, 'Re:ZERO');
+  } finally {
+    Object.defineProperty(globalThis, 'fetch', { configurable: true, value: previousFetch });
+  }
+});