fix(dictionary): sync Hachidori deck to ankiConnect.deck for polling

- Always set the first Hachidori Anki template deck to ankiConnect.deck so polling mode enriches Hachidori cards; other custom template settings stay intact
- Treat right-clicks retargeted to the Hachidori popup shadow host as overlay interactions so they no longer raise mpv or toggle pause
- Update anki-integration docs and changelog fragment

src/renderer/handlers/keyboard.test.ts

@@ -5,6 +5,7 @@ import test from 'node:test';
 
 import { createKeyboardHandlers } from './keyboard.js';
 import { createRendererState } from '../state.js';
+import { YOMITAN_POPUP_HOST_SELECTOR } from '../yomitan-popup.js';
 import type { CompiledSessionBinding } from '../../types';
 import type { MpvInputBindingsSnapshot } from '../../types/session-bindings';
 import { DEFAULT_KEYBINDINGS, SPECIAL_COMMANDS } from '../../config/definitions';
@@ -442,6 +443,13 @@ function installKeyboardTestGlobals() {
       target.closest = (selector: string) => (selector.includes('.modal') ? target : null);
       return target;
     },
+    // Events inside Hachidori's shadow root reach the document retargeted to its host.
+    createDictionaryPopupHostTarget: () => {
+      const target = new TestElement();
+      target.closest = (selector: string) =>
+        selector === YOMITAN_POPUP_HOST_SELECTOR ? target : null;
+      return target;
+    },
     setGetSessionBindings: (value: () => Promise<CompiledSessionBinding[]>) => {
       getSessionBindingsImpl = value;
     },
@@ -683,6 +691,23 @@ test('right-clicking interactive overlay controls does not raise playback window
   }
 });
 
+test('right-clicking inside a dictionary popup host does not raise playback window or toggle pause', async () => {
+  const { handlers, testGlobals } = createKeyboardHandlerHarness();
+  const popupHost = testGlobals.createDictionaryPopupHostTarget();
+
+  try {
+    await handlers.setupMpvInputForwarding();
+
+    testGlobals.dispatchDocumentMouseDown({ button: 2, target: popupHost });
+    await wait(0);
+
+    assert.deepEqual(testGlobals.interactionActivations, []);
+    assert.deepEqual(testGlobals.mpvCommands, []);
+  } finally {
+    testGlobals.restore();
+  }
+});
+
 test('mpv input forwarding retries a transient keyboard config IPC failure', async () => {
   const { handlers, testGlobals } = createKeyboardHandlerHarness();
   let calls = 0;

src/renderer/handlers/keyboard.ts

@@ -4,6 +4,7 @@ import { createMpvInputForwarding } from './mpv-input-forwarding';
 import {
   registerDictionaryPopupVisibilityListener,
   YOMITAN_POPUP_COMMAND_EVENT,
+  YOMITAN_POPUP_HOST_SELECTOR,
   isYomitanPopupVisible,
   isYomitanPopupIframe,
 } from '../yomitan-popup.js';
@@ -82,6 +83,8 @@ export function createKeyboardHandlers(
     if (target.closest('.modal')) return true;
     if (ctx.dom.subtitleContainer.contains(target)) return true;
     if (isYomitanPopupIframe(target)) return true;
+    // Hachidori's popup lives in a shadow root, so its events arrive retargeted to the host.
+    if (target.closest(YOMITAN_POPUP_HOST_SELECTOR)) return true;
     if (target.closest && target.closest('iframe.yomitan-popup, iframe[id^="yomitan-popup"]'))
       return true;
     return false;