Wire Yomitan session into overlay window creation

- Pass `yomitanSession` through overlay window factory deps
- Set BrowserWindow `webPreferences.session` when session is available
- Extend tests to verify session plumbing across runtime/factory layers

src/core/services/overlay-window-config.test.ts

@@ -9,3 +9,10 @@ test('overlay window config explicitly disables renderer sandbox for preload com
 
   assert.match(source, /webPreferences:\s*\{[\s\S]*sandbox:\s*false[\s\S]*\}/m);
 });
+
+test('overlay window config uses the provided Yomitan session when available', () => {
+  const sourcePath = path.join(process.cwd(), 'src/core/services/overlay-window.ts');
+  const source = fs.readFileSync(sourcePath, 'utf8');
+
+  assert.match(source, /session:\s*options\.yomitanSession\s*\?\?\s*undefined/);
+});

src/core/services/overlay-window.ts

@@ -1,4 +1,4 @@
-import { BrowserWindow } from 'electron';
+import { BrowserWindow, type Session } from 'electron';
 import * as path from 'path';
 import { WindowGeometry } from '../../types';
 import { createLogger } from '../../logger';
@@ -78,6 +78,7 @@ export function createOverlayWindow(
     tryHandleOverlayShortcutLocalFallback: (input: Electron.Input) => boolean;
     forwardTabToMpv: () => void;
     onWindowClosed: (kind: OverlayWindowKind) => void;
+    yomitanSession?: Session | null;
   },
 ): BrowserWindow {
   const showNativeDebugFrame = process.platform === 'win32' && options.isDev;
@@ -102,6 +103,7 @@ export function createOverlayWindow(
       nodeIntegration: false,
       sandbox: false,
       webSecurity: true,
+      session: options.yomitanSession ?? undefined,
       additionalArguments: [`--overlay-layer=${kind}`],
     },
   });

src/main.ts

@@ -3556,10 +3556,11 @@ const { createMainWindow: createMainWindowHandler, createModalWindow: createModa
       onRuntimeOptionsChanged: () => broadcastRuntimeOptionsChanged(),
       setOverlayDebugVisualizationEnabled: (enabled) =>
         setOverlayDebugVisualizationEnabled(enabled),
-      isOverlayVisible: (windowKind) =>
-        windowKind === 'visible' ? overlayManager.getVisibleOverlayVisible() : false,
-      tryHandleOverlayShortcutLocalFallback: (input) =>
-        overlayShortcutsRuntime.tryHandleOverlayShortcutLocalFallback(input),
+    isOverlayVisible: (windowKind) =>
+      windowKind === 'visible' ? overlayManager.getVisibleOverlayVisible() : false,
+    getYomitanSession: () => appState.yomitanSession,
+    tryHandleOverlayShortcutLocalFallback: (input) =>
+      overlayShortcutsRuntime.tryHandleOverlayShortcutLocalFallback(input),
       forwardTabToMpv: () => sendMpvCommandRuntime(appState.mpvClient, ['keypress', 'TAB']),
       onWindowClosed: (windowKind) => {
         if (windowKind === 'visible') {

src/main/runtime/overlay-window-factory-main-deps.test.ts

@@ -8,6 +8,7 @@ import {
 
 test('overlay window factory main deps builders return mapped handlers', () => {
   const calls: string[] = [];
+  const yomitanSession = { id: 'session' } as never;
   const buildOverlayDeps = createBuildCreateOverlayWindowMainDepsHandler({
     createOverlayWindowCore: (kind) => ({ kind }),
     isDev: true,
@@ -18,11 +19,13 @@ test('overlay window factory main deps builders return mapped handlers', () => {
     tryHandleOverlayShortcutLocalFallback: () => false,
     forwardTabToMpv: () => calls.push('forward-tab'),
     onWindowClosed: (kind) => calls.push(`closed:${kind}`),
+    getYomitanSession: () => yomitanSession,
   });
 
   const overlayDeps = buildOverlayDeps();
   assert.equal(overlayDeps.isDev, true);
   assert.equal(overlayDeps.isOverlayVisible('visible'), true);
+  assert.equal(overlayDeps.getYomitanSession(), yomitanSession);
   overlayDeps.forwardTabToMpv();
 
   const buildMainDeps = createBuildCreateMainWindowMainDepsHandler({

src/main/runtime/overlay-window-factory-main-deps.ts

@@ -1,3 +1,5 @@
+import type { Session } from 'electron';
+
 export function createBuildCreateOverlayWindowMainDepsHandler<TWindow>(deps: {
   createOverlayWindowCore: (
     kind: 'visible' | 'modal',
@@ -10,6 +12,7 @@ export function createBuildCreateOverlayWindowMainDepsHandler<TWindow>(deps: {
       tryHandleOverlayShortcutLocalFallback: (input: Electron.Input) => boolean;
       forwardTabToMpv: () => void;
       onWindowClosed: (windowKind: 'visible' | 'modal') => void;
+      yomitanSession?: Session | null;
     },
   ) => TWindow;
   isDev: boolean;
@@ -20,6 +23,7 @@ export function createBuildCreateOverlayWindowMainDepsHandler<TWindow>(deps: {
   tryHandleOverlayShortcutLocalFallback: (input: Electron.Input) => boolean;
   forwardTabToMpv: () => void;
   onWindowClosed: (windowKind: 'visible' | 'modal') => void;
+  getYomitanSession?: () => Session | null;
 }) {
   return () => ({
     createOverlayWindowCore: deps.createOverlayWindowCore,
@@ -31,6 +35,7 @@ export function createBuildCreateOverlayWindowMainDepsHandler<TWindow>(deps: {
     tryHandleOverlayShortcutLocalFallback: deps.tryHandleOverlayShortcutLocalFallback,
     forwardTabToMpv: deps.forwardTabToMpv,
     onWindowClosed: deps.onWindowClosed,
+    getYomitanSession: () => deps.getYomitanSession?.() ?? null,
   });
 }
 

src/main/runtime/overlay-window-factory.test.ts

@@ -9,12 +9,14 @@ import {
 test('create overlay window handler forwards options and kind', () => {
   const calls: string[] = [];
   const window = { id: 1 };
+  const yomitanSession = { id: 'session' } as never;
   const createOverlayWindow = createCreateOverlayWindowHandler({
     createOverlayWindowCore: (kind, options) => {
       calls.push(`kind:${kind}`);
       assert.equal(options.isDev, true);
       assert.equal(options.isOverlayVisible('visible'), true);
       assert.equal(options.isOverlayVisible('modal'), false);
+      assert.equal(options.yomitanSession, yomitanSession);
       options.forwardTabToMpv();
       options.onRuntimeOptionsChanged();
       options.setOverlayDebugVisualizationEnabled(true);
@@ -29,6 +31,7 @@ test('create overlay window handler forwards options and kind', () => {
     tryHandleOverlayShortcutLocalFallback: () => false,
     forwardTabToMpv: () => calls.push('forward-tab'),
     onWindowClosed: (kind) => calls.push(`closed:${kind}`),
+    getYomitanSession: () => yomitanSession,
   });
 
   assert.equal(createOverlayWindow('visible'), window);

src/main/runtime/overlay-window-factory.ts

@@ -1,3 +1,5 @@
+import type { Session } from 'electron';
+
 type OverlayWindowKind = 'visible' | 'modal';
 
 export function createCreateOverlayWindowHandler<TWindow>(deps: {
@@ -12,6 +14,7 @@ export function createCreateOverlayWindowHandler<TWindow>(deps: {
       tryHandleOverlayShortcutLocalFallback: (input: Electron.Input) => boolean;
       forwardTabToMpv: () => void;
       onWindowClosed: (windowKind: OverlayWindowKind) => void;
+      yomitanSession?: Session | null;
     },
   ) => TWindow;
   isDev: boolean;
@@ -22,6 +25,7 @@ export function createCreateOverlayWindowHandler<TWindow>(deps: {
   tryHandleOverlayShortcutLocalFallback: (input: Electron.Input) => boolean;
   forwardTabToMpv: () => void;
   onWindowClosed: (windowKind: OverlayWindowKind) => void;
+  getYomitanSession?: () => Session | null;
 }) {
   return (kind: OverlayWindowKind): TWindow => {
     return deps.createOverlayWindowCore(kind, {
@@ -33,6 +37,7 @@ export function createCreateOverlayWindowHandler<TWindow>(deps: {
       tryHandleOverlayShortcutLocalFallback: deps.tryHandleOverlayShortcutLocalFallback,
       forwardTabToMpv: deps.forwardTabToMpv,
       onWindowClosed: deps.onWindowClosed,
+      yomitanSession: deps.getYomitanSession?.() ?? null,
     });
   };
 }

src/main/runtime/overlay-window-runtime-handlers.test.ts

@@ -7,10 +7,14 @@ test('overlay window runtime handlers compose create/main/modal handlers', () =>
   let modalWindow: { kind: string } | null = null;
   let debugEnabled = false;
   const calls: string[] = [];
+  const yomitanSession = { id: 'session' } as never;
 
-  const runtime = createOverlayWindowRuntimeHandlers({
+  const runtime = createOverlayWindowRuntimeHandlers<{ kind: string }>({
     createOverlayWindowDeps: {
-      createOverlayWindowCore: (kind) => ({ kind }),
+      createOverlayWindowCore: (kind, options) => {
+        assert.equal(options.yomitanSession, yomitanSession);
+        return { kind };
+      },
       isDev: true,
       ensureOverlayWindowLevel: () => calls.push('ensure-level'),
       onRuntimeOptionsChanged: () => calls.push('runtime-options-changed'),
@@ -21,6 +25,7 @@ test('overlay window runtime handlers compose create/main/modal handlers', () =>
       tryHandleOverlayShortcutLocalFallback: () => false,
       forwardTabToMpv: () => calls.push('forward-tab'),
       onWindowClosed: (kind) => calls.push(`closed:${kind}`),
+      getYomitanSession: () => yomitanSession,
     },
     setMainWindow: (window) => {
       mainWindow = window;