diff --git a/electron/service/window-service/index.ts b/electron/service/window-service/index.ts
index 6d5ddf5..30b7a34 100644
--- a/electron/service/window-service/index.ts
+++ b/electron/service/window-service/index.ts
@@ -1,7 +1,7 @@
 import type { WindowNames } from '@runtime/lib/types'
 
 import { CONFIG_KEYS, IPC_EVENTS, WINDOW_NAMES } from '@runtime/lib/constants'
-import { BrowserWindow, BrowserWindowConstructorOptions, ipcMain, IpcMainInvokeEvent, type IpcMainEvent } from 'electron'
+import { app, BrowserWindow, BrowserWindowConstructorOptions, ipcMain, IpcMainInvokeEvent, type IpcMainEvent } from 'electron'
 import { createLogo } from '@electron/utils'
 
 import logManager from '@electron/service/logger'
@@ -9,6 +9,8 @@ import configManager from '@electron/service/config-service'
 import themeManager from '@electron/service/theme-service'
 import path from 'node:path';
 
+declare const MAIN_WINDOW_VITE_DEV_SERVER_URL: string | undefined;
+
 interface WindowState {
   instance: BrowserWindow | void;
   isHidden: boolean;
@@ -93,8 +95,7 @@ class WindowService {
     if (this.get(name)) return;
     const isHiddenWin = this._isHiddenWin(name);
     let window = this._createWinInstance(name, { ...size, ...moreOpts });
-
-    if (this.isDev) window.webContents.openDevTools()
+    this._setupDevtools(window, name);
 
     !isHiddenWin && this
       ._setupWinLifecycle(window, name)
@@ -120,6 +121,41 @@ class WindowService {
     return window;
   }
 
+  private _setupDevtools(window: BrowserWindow, name: WindowNames) {
+    if (!this.isDev) return;
+
+    let opened = false;
+    const openDevtools = () => {
+      if (opened || window.isDestroyed()) return;
+      opened = true;
+
+      try {
+        window.webContents.openDevTools({ mode: 'detach', activate: true });
+        logManager.info(`DevTools opened for window: ${name}`);
+      } catch (error) {
+        opened = false;
+        logManager.warn(`Failed to open DevTools for window: ${name}`, error);
+      }
+    };
+
+    window.webContents.once('did-finish-load', () => {
+      setTimeout(openDevtools, 150);
+    });
+
+    window.webContents.on('before-input-event', (_event, input) => {
+      const isMacDevtoolsShortcut = process.platform === 'darwin' && input.meta && input.alt && input.key.toLowerCase() === 'i';
+      const isF12 = input.key === 'F12';
+      if (!isF12 && !isMacDevtoolsShortcut) return;
+
+      if (window.webContents.isDevToolsOpened()) {
+        window.webContents.closeDevTools();
+        return;
+      }
+
+      openDevtools();
+    });
+  }
+
   private _setupWinLifecycle(window: BrowserWindow, name: WindowNames) {
     window.once('closed', () => {
       this._winStates[name].onClosed.forEach(callback => callback(window));
diff --git a/src/components/layout/MainLayout.tsx b/src/components/layout/MainLayout.tsx
index 632a448..f2f3679 100644
--- a/src/components/layout/MainLayout.tsx
+++ b/src/components/layout/MainLayout.tsx
@@ -6,7 +6,7 @@ export default function MainLayout() {
   const platform = (window as any).api?.platform ?? '';
 
   return (
-    <div className="bg-white dark:!bg-[#0f0f10] h-screen flex flex-col">
+    <div className=" dark:!bg-[#0f0f10] h-screen flex flex-col">
       <TitleBar />
 
       <main
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index df70ea6..3eea23d 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -3,6 +3,8 @@ import { Book, Clock, Code, Cpu, House, Puzzle, Settings } from 'lucide-react';
 import { useI18n } from '../../i18n';
 import { NAV_ITEMS, normalizeWorkspacePath } from '../../router/routes';
 
+import blueLogo from '../../assets/images/login/blue_logo.png';
+
 const MENU_MARKS: Record<string, typeof House> = {
   '/home': House,
   '/knowledge': Book,
@@ -21,7 +23,7 @@ export default function Sidebar() {
 
   return (
     <aside className="box-border flex h-full w-[80px] flex-col items-center pb-[8px]">
-      <div className="flex w-full flex-col gap-[16px]">
+      <div className="flex flex-1 w-full flex-col gap-[16px]">
         {NAV_ITEMS.map((item) => {
           const active = currentId === item.path;
           const isSetting = item.path === '/setting';
@@ -64,7 +66,7 @@ export default function Sidebar() {
       </div>
 
       <div className="mt-auto flex h-[48px] w-[48px] items-center justify-center overflow-hidden rounded-full border border-black/10 bg-white dark:border-[#2a2a2d] dark:bg-[#222225]">
-        <span className="text-[16px] font-bold text-[#2B7FFF]">Z</span>
+        <img className="h-full w-full object-cover" src={blueLogo} alt="Logo" />
       </div>
     </aside>
   );