diff --git a/scripts/devStartupSequence.mts b/scripts/devStartupSequence.mts
index e493030c47..fbac638a14 100644
--- a/scripts/devStartupSequence.mts
+++ b/scripts/devStartupSequence.mts
@@ -1,34 +1,20 @@
-import { type ChildProcess, spawn } from 'node:child_process';
+import type { ChildProcess } from 'node:child_process';
+import { spawn } from 'node:child_process';
+import net from 'node:net';
+import path from 'node:path';
+import { pathToFileURL } from 'node:url';
+
 import dotenv from 'dotenv';
 import dotenvExpand from 'dotenv-expand';
-import net from 'node:net';
 
-const env = process.env.NODE_ENV || 'development';
-const isWindows = process.platform === 'win32';
-
-const shellEnv = Object.entries(process.env).reduce<Record<string, string>>(
-  (acc, [key, value]) => {
-    if (typeof value === 'string') acc[key] = value;
-    return acc;
-  },
-  {},
-);
-const dotenvEnv: Record<string, string> = {};
-const dotenvResult = dotenv.config({
-  override: true,
-  path: ['.env', `.env.${env}`, `.env.${env}.local`],
-  processEnv: dotenvEnv,
-});
-
-if (dotenvResult.parsed) {
-  const expanded = dotenvExpand.expand({
-    parsed: dotenvResult.parsed,
-    processEnv: { ...dotenvEnv, ...shellEnv },
-  });
-
-  Object.assign(process.env, expanded.parsed, shellEnv);
+interface DevProcessHandle {
+  directPid?: number;
+  groupPid?: number;
+  isWindows: boolean;
 }
 
+const isWindows = process.platform === 'win32';
+
 const NEXT_HOST = 'localhost';
 
 /**
@@ -44,16 +30,19 @@ const resolveNextPort = (): number => {
   return 3010;
 };
 
-const NEXT_PORT = resolveNextPort();
-const NEXT_ROOT_URL = `http://${NEXT_HOST}:${NEXT_PORT}/`;
 const NEXT_READY_TIMEOUT_MS = 180_000;
 const NEXT_READY_RETRY_MS = 400;
 const FORCE_KILL_TIMEOUT_MS = 5_000;
 
 const npmCommand = isWindows ? 'npm.cmd' : 'npm';
 
+let nextPort = 3010;
+let nextRootUrl = `http://${NEXT_HOST}:${nextPort}/`;
 let nextProcess: ChildProcess | undefined;
 let viteProcess: ChildProcess | undefined;
+let nextHandle: DevProcessHandle | undefined;
+let viteHandle: DevProcessHandle | undefined;
+let forceKillTimer: ReturnType<typeof setTimeout> | undefined;
 let shuttingDown = false;
 
 const runNpmScript = (scriptName: string) =>
@@ -64,6 +53,66 @@ const runNpmScript = (scriptName: string) =>
     shell: isWindows,
   });
 
+const loadEnv = () => {
+  const env = process.env.NODE_ENV || 'development';
+  const shellEnv = Object.entries(process.env).reduce<Record<string, string>>(
+    (acc, [key, value]) => {
+      if (typeof value === 'string') acc[key] = value;
+      return acc;
+    },
+    {},
+  );
+  const dotenvEnv: Record<string, string> = {};
+  const dotenvResult = dotenv.config({
+    override: true,
+    path: ['.env', `.env.${env}`, `.env.${env}.local`],
+    processEnv: dotenvEnv,
+  });
+
+  if (!dotenvResult.parsed) return;
+
+  const expanded = dotenvExpand.expand({
+    parsed: dotenvResult.parsed,
+    processEnv: { ...dotenvEnv, ...shellEnv },
+  });
+
+  Object.assign(process.env, expanded.parsed, shellEnv);
+};
+
+const createDevProcessHandle = ({
+  isWindows,
+  pid,
+}: {
+  isWindows: boolean;
+  pid?: number;
+}): DevProcessHandle => ({
+  directPid: pid,
+  groupPid: isWindows ? undefined : pid,
+  isWindows,
+});
+
+const sendSignalToDevProcess = (handle: DevProcessHandle | undefined, signal: NodeJS.Signals) => {
+  if (!handle) return;
+
+  if (!handle.isWindows && handle.groupPid) {
+    try {
+      process.kill(-handle.groupPid, signal);
+      return;
+    } catch {
+      // Fall through to the direct child pid below. The wrapper may already be
+      // gone while its process group has been reaped.
+    }
+  }
+
+  if (!handle.directPid) return;
+
+  try {
+    process.kill(handle.directPid, signal);
+  } catch {
+    // The process already exited.
+  }
+};
+
 const wait = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));
 
 const isPortOpen = (host: string, port: number) =>
@@ -84,25 +133,27 @@ const waitForNextReady = async () => {
   const startedAt = Date.now();
 
   while (Date.now() - startedAt < NEXT_READY_TIMEOUT_MS) {
-    if (await isPortOpen(NEXT_HOST, NEXT_PORT)) return;
+    if (await isPortOpen(NEXT_HOST, nextPort)) return;
     await wait(NEXT_READY_RETRY_MS);
   }
 
   throw new Error(
-    `Next server was not ready within ${NEXT_READY_TIMEOUT_MS / 1000}s on ${NEXT_HOST}:${NEXT_PORT}`,
+    `Next server was not ready within ${NEXT_READY_TIMEOUT_MS / 1000}s on ${NEXT_HOST}:${nextPort}`,
   );
 };
 
 const prewarmNextRootCompile = async () => {
   const startedAt = Date.now();
-  const response = await fetch(NEXT_ROOT_URL, { signal: AbortSignal.timeout(120_000) });
+  const response = await fetch(nextRootUrl, { signal: AbortSignal.timeout(120_000) });
   const elapsed = ((Date.now() - startedAt) / 1000).toFixed(2);
-  console.log(`✅ Next prewarm request finished (${response.status}) in ${elapsed}s ${NEXT_ROOT_URL}`);
+  console.log(
+    `✅ Next prewarm request finished (${response.status}) in ${elapsed}s ${nextRootUrl}`,
+  );
 };
 
 const runNextBackgroundTasks = () => {
   setTimeout(() => {
-    console.log(`🔁 Next server URL: ${NEXT_ROOT_URL}`);
+    console.log(`🔁 Next server URL: ${nextRootUrl}`);
   }, 2_000);
 
   void (async () => {
@@ -115,67 +166,69 @@ const runNextBackgroundTasks = () => {
   })();
 };
 
-const isChildAlive = (child: ChildProcess) =>
-  !child.killed && child.exitCode === null && child.signalCode === null;
-
-const sendKillSignal = (child: ChildProcess, signal: NodeJS.Signals) => {
-  if (!isChildAlive(child) || !child.pid) return;
-  try {
-    if (!isWindows) {
-      try {
-        process.kill(-child.pid, signal);
-        return;
-      } catch {
-        // process group kill failed; fall through to direct kill
-      }
-    }
-    child.kill(signal);
-  } catch {
-    // child already gone
-  }
+const terminateChildren = () => {
+  sendSignalToDevProcess(viteHandle, 'SIGTERM');
+  sendSignalToDevProcess(nextHandle, 'SIGTERM');
 };
 
-const terminateChild = (child?: ChildProcess) => {
-  if (!child) return;
-  sendKillSignal(child, 'SIGTERM');
+const forceKillChildren = () => {
+  sendSignalToDevProcess(viteHandle, 'SIGKILL');
+  sendSignalToDevProcess(nextHandle, 'SIGKILL');
 };
 
-const forceKillChild = (child?: ChildProcess) => {
-  if (!child) return;
-  sendKillSignal(child, 'SIGKILL');
+const clearForceKillTimer = () => {
+  if (!forceKillTimer) return;
+  clearTimeout(forceKillTimer);
+  forceKillTimer = undefined;
+};
+
+const hasChildSettled = (child?: ChildProcess) =>
+  !child || child.exitCode !== null || child.signalCode !== null;
+
+const clearForceKillTimerWhenChildrenSettle = () => {
+  if (!shuttingDown) return;
+  if (hasChildSettled(nextProcess) && hasChildSettled(viteProcess)) clearForceKillTimer();
 };
 
 const shutdownAll = (signal: NodeJS.Signals) => {
-  if (shuttingDown) return;
+  if (shuttingDown) {
+    forceKillChildren();
+    return;
+  }
   shuttingDown = true;
 
-  terminateChild(viteProcess);
-  terminateChild(nextProcess);
+  terminateChildren();
 
   process.exitCode = signal === 'SIGINT' ? 130 : 143;
 
-  const forceKillTimer = setTimeout(() => {
-    forceKillChild(viteProcess);
-    forceKillChild(nextProcess);
+  forceKillTimer = setTimeout(() => {
+    forceKillTimer = undefined;
+    forceKillChildren();
   }, FORCE_KILL_TIMEOUT_MS);
-  forceKillTimer.unref();
 };
 
 const watchChildExit = (child: ChildProcess, name: 'next' | 'vite') => {
   child.once('exit', (code, signal) => {
-    if (!shuttingDown) {
-      console.error(
-        `❌ ${name} exited unexpectedly (code: ${code ?? 'null'}, signal: ${signal ?? 'null'})`,
-      );
-      shutdownAll('SIGTERM');
+    if (shuttingDown) {
+      clearForceKillTimerWhenChildrenSettle();
+      return;
     }
+
+    console.error(
+      `❌ ${name} exited unexpectedly (code: ${code ?? 'null'}, signal: ${signal ?? 'null'})`,
+    );
+    shutdownAll('SIGTERM');
   });
 };
 
 const main = async () => {
+  loadEnv();
+  nextPort = resolveNextPort();
+  nextRootUrl = `http://${NEXT_HOST}:${nextPort}/`;
+
   const forwardedSignals: NodeJS.Signals[] = ['SIGINT', 'SIGTERM', 'SIGHUP'];
   for (const sig of forwardedSignals) {
-    process.once(sig, () => shutdownAll(sig));
+    process.on(sig, () => shutdownAll(sig));
   }
 
   process.on('uncaughtException', (error) => {
@@ -189,19 +242,20 @@ const main = async () => {
   });
 
   process.on('exit', () => {
-    forceKillChild(viteProcess);
-    forceKillChild(nextProcess);
+    forceKillChildren();
   });
 
-  nextProcess = spawn('npx', ['next', 'dev', '-p', String(NEXT_PORT)], {
+  nextProcess = spawn('npx', ['next', 'dev', '-p', String(nextPort)], {
     detached: !isWindows,
     env: process.env,
     stdio: 'inherit',
     shell: isWindows,
   });
+  nextHandle = createDevProcessHandle({ isWindows, pid: nextProcess.pid });
   watchChildExit(nextProcess, 'next');
 
   viteProcess = runNpmScript('dev:spa');
+  viteHandle = createDevProcessHandle({ isWindows, pid: viteProcess.pid });
   watchChildExit(viteProcess, 'vite');
   runNextBackgroundTasks();
 
@@ -211,7 +265,19 @@ const main = async () => {
   ]);
 };
 
-void main().catch((error) => {
-  console.error('❌ dev startup sequence failed:', error);
-  shutdownAll('SIGTERM');
-});
+const isMainModule = () => {
+  const entry = process.argv[1];
+  return !!entry && import.meta.url === pathToFileURL(path.resolve(entry)).href;
+};
+
+export const __testing = {
+  createDevProcessHandle,
+  sendSignalToDevProcess,
+};
+
+if (isMainModule()) {
+  void main().catch((error) => {
+    console.error('❌ dev startup sequence failed:', error);
+    shutdownAll('SIGTERM');
+  });
+}
diff --git a/src/features/Electron/AuthRequiredModal/index.tsx b/src/features/Electron/AuthRequiredModal/index.tsx
index 203a826b08..9e3d4c44c4 100644
--- a/src/features/Electron/AuthRequiredModal/index.tsx
+++ b/src/features/Electron/AuthRequiredModal/index.tsx
@@ -1,9 +1,8 @@
 'use client';
 
 import { useWatchBroadcast } from '@lobechat/electron-client-ipc';
-import { Flexbox, Icon } from '@lobehub/ui';
+import { Button, Flexbox, Icon } from '@lobehub/ui';
 import {
-  Button,
   createModal,
   type ImperativeModalProps,
   ModalFooter,
diff --git a/src/features/RecommendTaskTemplates/TaskTemplateDetailModal.tsx b/src/features/RecommendTaskTemplates/TaskTemplateDetailModal.tsx
index 481044086b..2dc35e8f10 100644
--- a/src/features/RecommendTaskTemplates/TaskTemplateDetailModal.tsx
+++ b/src/features/RecommendTaskTemplates/TaskTemplateDetailModal.tsx
@@ -1,8 +1,8 @@
 'use client';
 
 import type { TaskTemplate } from '@lobechat/const';
-import { ActionIcon, Flexbox, Icon, Markdown, Text } from '@lobehub/ui';
-import { Button, createModal, type ModalInstance, useModalContext } from '@lobehub/ui/base-ui';
+import { ActionIcon, Button, Flexbox, Icon, Markdown, Text } from '@lobehub/ui';
+import { createModal, type ModalInstance, useModalContext } from '@lobehub/ui/base-ui';
 import { Divider } from 'antd';
 import { cssVar } from 'antd-style';
 import { Clock, X } from 'lucide-react';
diff --git a/src/scripts/devProcessCleanup.test.ts b/src/scripts/devProcessCleanup.test.ts
new file mode 100644
index 0000000000..8b7781a700
--- /dev/null
+++ b/src/scripts/devProcessCleanup.test.ts
@@ -0,0 +1,84 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+interface DevProcessHandle {
+  directPid?: number;
+  groupPid?: number;
+  isWindows: boolean;
+}
+
+interface DevStartupTestingExports {
+  __testing: {
+    createDevProcessHandle: (params: { isWindows: boolean; pid?: number }) => DevProcessHandle;
+    sendSignalToDevProcess: (handle: DevProcessHandle | undefined, signal: NodeJS.Signals) => void;
+  };
+}
+
+const loadTestingExports = async () => {
+  const modulePath = '../../scripts/devStartupSequence' + '.mts';
+  return (await import(modulePath)) as unknown as DevStartupTestingExports;
+};
+
+describe('devProcessCleanup', () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('should save the detached process group pid on Unix', async () => {
+    const { createDevProcessHandle } = (await loadTestingExports()).__testing;
+
+    expect(createDevProcessHandle({ isWindows: false, pid: 1234 })).toEqual({
+      directPid: 1234,
+      groupPid: 1234,
+      isWindows: false,
+    });
+  });
+
+  it('should signal the saved process group without requiring the direct child to be alive', async () => {
+    const { sendSignalToDevProcess } = (await loadTestingExports()).__testing;
+    const kill = vi.spyOn(process, 'kill').mockImplementation(() => true);
+
+    sendSignalToDevProcess(
+      {
+        directPid: 1234,
+        groupPid: 1234,
+        isWindows: false,
+      },
+      'SIGTERM',
+    );
+
+    expect(kill).toHaveBeenCalledTimes(1);
+    expect(kill).toHaveBeenCalledWith(-1234, 'SIGTERM');
+  });
+
+  it('should fall back to the direct child pid when the process group is already gone', async () => {
+    const { sendSignalToDevProcess } = (await loadTestingExports()).__testing;
+    const kill = vi.spyOn(process, 'kill').mockImplementation((pid) => {
+      if (pid < 0) throw new Error('missing process group');
+      return true;
+    });
+
+    sendSignalToDevProcess(
+      {
+        directPid: 1234,
+        groupPid: 1234,
+        isWindows: false,
+      },
+      'SIGKILL',
+    );
+
+    expect(kill).toHaveBeenCalledTimes(2);
+    expect(kill).toHaveBeenNthCalledWith(1, -1234, 'SIGKILL');
+    expect(kill).toHaveBeenNthCalledWith(2, 1234, 'SIGKILL');
+  });
+
+  it('should signal only the direct child pid on Windows', async () => {
+    const { createDevProcessHandle, sendSignalToDevProcess } = (await loadTestingExports())
+      .__testing;
+    const kill = vi.spyOn(process, 'kill').mockImplementation(() => true);
+
+    sendSignalToDevProcess(createDevProcessHandle({ isWindows: true, pid: 1234 }), 'SIGTERM');
+
+    expect(kill).toHaveBeenCalledTimes(1);
+    expect(kill).toHaveBeenCalledWith(1234, 'SIGTERM');
+  });
+});