feat(dictionary): add Hachidori backend support

- Add backend selection, setup gating, Anki integration, and external host support
- Add launcher flags, documentation, packaging, and focused tests
- Open on-demand overlay modals on the first attempt

src/renderer/modals/session-help-sections.ts

@@ -368,7 +368,7 @@ function buildFixedOverlaySections(): SessionHelpSection[] {
         { shortcut: 'Y then S', action: 'Start overlay' },
         { shortcut: 'Y then Shift + S', action: 'Stop overlay' },
         { shortcut: 'Y then T', action: 'Toggle visible overlay' },
-        { shortcut: 'Y then O', action: 'Open Yomitan settings' },
+        { shortcut: 'Y then O', action: 'Open dictionary settings' },
         { shortcut: 'Y then R', action: 'Restart overlay' },
         { shortcut: 'Y then C', action: 'Check overlay status' },
         { shortcut: 'Y then H/K', action: 'Open session help' },
@@ -377,7 +377,7 @@ function buildFixedOverlaySections(): SessionHelpSection[] {
     },
     {
       title: 'Global shortcuts',
-      rows: [{ shortcut: 'Alt + Shift + Y', action: 'Open Yomitan settings' }],
+      rows: [{ shortcut: 'Alt + Shift + Y', action: 'Open dictionary settings' }],
     },
   ];
 }

src/renderer/modals/youtube-track-picker.test.ts

@@ -274,7 +274,7 @@ test('youtube track picker close restores focus and mouse-ignore state', () => {
     assert.equal(state.youtubePickerModalOpen, false);
     assert.deepEqual(syncCalls, ['sync', 'sync', 'restore-pointer']);
     assert.deepEqual(notifications, ['youtube-track-picker']);
-    assert.deepEqual(frontendCommands, [{ type: 'refreshOptions' }]);
+    assert.deepEqual(frontendCommands, []);
     assert.equal(overlay.classList.contains('interactive'), false);
     assert.equal(focusMainWindowCalls.length > 0, true);
     assert.equal(overlayFocusCalls.length > 0, true);

src/renderer/modals/youtube-track-picker.ts

@@ -1,6 +1,5 @@
 import type { YoutubePickerOpenPayload } from '../../types';
 import type { ModalStateReader, RendererContext } from '../context';
-import { YOMITAN_POPUP_COMMAND_EVENT } from '../yomitan-popup.js';
 
 function createOption(value: string, label: string): HTMLOptionElement {
   const option = document.createElement('option');
@@ -197,13 +196,6 @@ export function createYoutubeTrackPickerModal(
     ctx.dom.youtubePickerModal.classList.add('hidden');
     ctx.dom.youtubePickerModal.setAttribute('aria-hidden', 'true');
     window.electronAPI.notifyOverlayModalClosed('youtube-track-picker');
-    window.dispatchEvent(
-      new CustomEvent(YOMITAN_POPUP_COMMAND_EVENT, {
-        detail: {
-          type: 'refreshOptions',
-        },
-      }),
-    );
     if (!options.modalStateReader.isAnyModalOpen()) {
       ctx.dom.overlay.classList.remove('interactive');
     }