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.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;