diff --git a/main.py b/main.py
index e865a7a..1812072 100644
--- a/main.py
+++ b/main.py
@@ -1,7 +1,11 @@
 import sys
 import os
 import time
-from PyQt6.QtCore import Qt
+import ctypes
+import ctypes.wintypes
+import subprocess
+import importlib.util
+from PyQt6.QtCore import Qt, QAbstractNativeEventFilter
 from PyQt6.QtWidgets import QApplication
 from PyQt6.QtGui import QIcon
 from db.database import init_db
@@ -12,6 +16,111 @@ from db import database
 
 from app_info import __VERSION__, app_title
 
+
+def _install_requirements_on_startup() -> None:
+    """
+    启动时仅在“检测到缺失依赖”时安装 requirements。
+    失败时不阻塞主程序启动。
+    """
+    if getattr(sys, "frozen", False):
+        # 打包态通常无法通过当前 exe 直接调用 pip，直接跳过
+        return
+
+    req_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "requirements.txt")
+    if not os.path.exists(req_path):
+        return
+
+    module_name_map = {
+        "pyqt6": "PyQt6",
+        "pillow": "PIL",
+    }
+
+    def _req_name(req_line: str) -> str:
+        s = req_line.split(";", 1)[0].strip()
+        s = s.split("[", 1)[0]
+        for sep in ("==", ">=", "<=", "~=", "!=", ">", "<"):
+            if sep in s:
+                s = s.split(sep, 1)[0].strip()
+                break
+        return s
+
+    missing_reqs: list[str] = []
+    try:
+        with open(req_path, "r", encoding="utf-8") as f:
+            for raw in f:
+                line = raw.strip()
+                if not line or line.startswith("#"):
+                    continue
+                pkg_name = _req_name(line)
+                if not pkg_name:
+                    continue
+                mod_name = module_name_map.get(pkg_name.lower(), pkg_name)
+                if importlib.util.find_spec(mod_name) is None:
+                    missing_reqs.append(line)
+    except Exception:
+        return
+
+    if not missing_reqs:
+        return
+
+    cmd = [sys.executable, "-m", "pip", "install", *missing_reqs]
+    kwargs = {
+        "stdout": subprocess.DEVNULL,
+        "stderr": subprocess.DEVNULL,
+        "check": False,
+    }
+    if sys.platform == "win32":
+        kwargs["creationflags"] = subprocess.CREATE_NO_WINDOW
+    try:
+        subprocess.run(cmd, **kwargs)
+    except Exception:
+        pass
+
+
+class GlobalHotkey(QAbstractNativeEventFilter):
+    """用 Win32 RegisterHotKey 注册真正的全局快捷键 Alt+`"""
+    _HOTKEY_ID   = 0x4E4D  # 任意唯一 ID
+    _MOD_ALT     = 0x0001
+    _VK_BACKTICK = 0xC0    # VK_OEM_3 = ` 键
+
+    def __init__(self, panel: "PanelWindow", ball: "FloatBall"):
+        super().__init__()
+        self._panel = panel
+        self._ball  = ball
+        self._hwnd  = None
+
+    def install(self):
+        if sys.platform != "win32":
+            return
+        # 用一个隐藏窗口的 HWND 来接收 WM_HOTKEY
+        self._hwnd = int(self._panel.winId())
+        ctypes.windll.user32.RegisterHotKey(
+            self._hwnd, self._HOTKEY_ID, self._MOD_ALT, self._VK_BACKTICK
+        )
+        QApplication.instance().installNativeEventFilter(self)
+
+    def uninstall(self):
+        if self._hwnd:
+            ctypes.windll.user32.UnregisterHotKey(self._hwnd, self._HOTKEY_ID)
+        QApplication.instance().removeNativeEventFilter(self)
+
+    def nativeEventFilter(self, event_type, message):
+        if event_type == b"windows_generic_MSG":
+            import ctypes
+            msg = ctypes.cast(int(message), ctypes.POINTER(ctypes.wintypes.MSG)).contents
+            WM_HOTKEY = 0x0312
+            if msg.message == WM_HOTKEY and msg.wParam == self._HOTKEY_ID:
+                self._toggle()
+        return False, 0
+
+    def _toggle(self):
+        if self._panel.isVisible():
+            self._panel.minimize_to_ball()
+        else:
+            self._panel.show_near(self._ball.pos(), BALL_SIZE)
+            self._panel.raise_()
+            self._panel.activateWindow()
+
 # ===================== 打包兼容核心函数 =====================
 def get_resource_path(relative_path):
     """
@@ -77,7 +186,9 @@ def _wake_existing_or_exit() -> bool:
 def main():
     if not _wake_existing_or_exit():
         return
-        
+
+    _install_requirements_on_startup()
+
     QApplication.setAttribute(Qt.ApplicationAttribute.AA_Use96Dpi, True)
     try:
         QApplication.setHighDpiScaleFactorRoundingPolicy(
@@ -111,16 +222,9 @@ def main():
     ball.clicked.connect(lambda: panel.show_near(ball.pos(), BALL_SIZE))
     ball.right_clicked.connect(lambda pos: panel.tray.contextMenu().exec(pos))
 
-    # 全局快捷键 Alt+` 唤醒/隐藏主界面
-    from PyQt6.QtGui import QShortcut, QKeySequence
-    _shortcut = QShortcut(QKeySequence("Alt+`"), panel)
-    _shortcut.setContext(Qt.ShortcutContext.ApplicationShortcut)
-    def _toggle_panel():
-        if panel.isVisible():
-            panel.minimize_to_ball()
-        else:
-            panel.show_near(ball.pos(), BALL_SIZE)
-    _shortcut.activated.connect(_toggle_panel)
+    # 全局快捷键 Alt+` 唤醒/隐藏主界面（Win32 RegisterHotKey，真正全局）
+    _hotkey = GlobalHotkey(panel, ball)
+    _hotkey.install()
 
     has_saved = bool(database.get_setting("panel_x", ""))
     if has_saved:
diff --git a/ui/__pycache__/dialog_style.cpython-313.pyc b/ui/__pycache__/dialog_style.cpython-313.pyc
index 0167c4a..aa9f03b 100644
Binary files a/ui/__pycache__/dialog_style.cpython-313.pyc and b/ui/__pycache__/dialog_style.cpython-313.pyc differ
diff --git a/ui/dialog_style.py b/ui/dialog_style.py
index 114f0c7..914890b 100644
--- a/ui/dialog_style.py
+++ b/ui/dialog_style.py
@@ -1,7 +1,7 @@
 """标准对话框（QMessageBox / QInputDialog / QFileDialog）与当前主题一致。"""
 from __future__ import annotations
 
-from PyQt6.QtCore import Qt
+from PyQt6.QtCore import Qt, QTimer
 from PyQt6.QtGui import QTextOption
 from PyQt6.QtWidgets import (
     QFileDialog,
@@ -37,7 +37,6 @@ def stylesheet() -> str:
         }}
         QMessageBox QLabel#qt_msgbox_label {{
             min-width: 200px;
-            max-width: 560px;
         }}
         QMessageBox QLabel#qt_msgboxex_icon_label {{
             min-width: 28px;
@@ -140,31 +139,74 @@ def _apply(w: QWidget | None) -> None:
 
 
 def _prepare_qmessagebox(msg: QMessageBox) -> None:
-    """让提示框按内容换行并自适应宽高（避免固定宽度截断文字）。"""
-    lbl = msg.findChild(QLabel, "qt_msgbox_label")
-    if lbl is not None:
-        lbl.setWordWrap(True)
-        lbl.setTextFormat(Qt.TextFormat.PlainText)
-        # 无空格长中文也能在边界处断行，而不是整段挤在一行被裁切
-        try:
-            lbl.setWordWrapMode(QTextOption.WrapMode.WrapAnywhere)
-        except AttributeError:
-            pass
-        lbl.setMinimumWidth(200)
-        lbl.setMaximumWidth(560)
-        lbl.setSizePolicy(
-            QSizePolicy.Policy.Preferred,
-            QSizePolicy.Policy.MinimumExpanding,
-        )
-    lay = msg.layout()
-    if lay is not None:
-        lay.activate()
+    """让提示框按内容换行并自适应宽高。"""
+    def _tune_labels() -> None:
+        # QMessageBox 里通常有两段文字：
+        # - qt_msgbox_label（主文本）
+        # - qt_msgbox_informativelabel（辅助文本/更长的提示）
+        # 部分平台会在显示/布局后才创建这些 label，因此这里支持延迟执行一次。
+        for obj_name in ("qt_msgbox_label", "qt_msgbox_informativelabel"):
+            w = msg.findChild(QWidget, obj_name)
+            if w is None:
+                continue
+
+            if hasattr(w, "setWordWrap"):
+                try:
+                    w.setWordWrap(True)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setTextFormat"):
+                try:
+                    w.setTextFormat(Qt.TextFormat.PlainText)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setWordWrapMode"):
+                try:
+                    w.setWordWrapMode(QTextOption.WrapMode.WrapAnywhere)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setTextElideMode"):
+                try:
+                    w.setTextElideMode(Qt.TextElideMode.ElideNone)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setMinimumWidth"):
+                try:
+                    w.setMinimumWidth(0)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setMaximumWidth"):
+                try:
+                    w.setMaximumWidth(16777215)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setSizePolicy"):
+                try:
+                    w.setSizePolicy(
+                        QSizePolicy.Policy.Expanding,
+                        QSizePolicy.Policy.MinimumExpanding,
+                    )  # type: ignore[attr-defined]
+                except Exception:
+                    pass
     msg.setSizePolicy(
         QSizePolicy.Policy.Preferred,
         QSizePolicy.Policy.Preferred,
     )
     msg.setMinimumSize(0, 0)
+    msg.setMaximumSize(16777215, 16777215)
+
+    lay = msg.layout()
+    if lay is not None:
+        # QMessageBox 内部通常是 QGridLayout：第 1 列是文本列
+        # 某些主题/平台会让文本列偏窄从而触发省略，这里显式拉伸该列并设置最小宽度。
+        try:
+            lay.setColumnStretch(1, 1)
+        except Exception:
+            pass
+        lay.activate()
+    _tune_labels()
     msg.adjustSize()
+    QTimer.singleShot(0, lambda: (_tune_labels(), msg.adjustSize()))
 
 
 def question(
diff --git a/ui/updater.py b/ui/updater.py
index 5263907..d3c11c3 100644
--- a/ui/updater.py
+++ b/ui/updater.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 """
 软件自动更新模块
 - 检查版本：GET https://api.yunzer.cn/api/softwareupgrade/check?code=niumasortware
@@ -13,12 +14,10 @@ import base64
 from PyQt6.QtCore import QThread, pyqtSignal, QObject
 from PyQt6.QtWidgets import QProgressDialog, QMessageBox, QApplication
 import urllib.request
+import ui.dialog_style as dialog_style
 
 
 UPDATE_CHECK_URL = "https://api.yunzer.cn/api/softwareupgrade/check?code=niumasortware"
-APP_NAME = "CleanDesktopOrganizer"
-# schtasks 的任务名在不同环境下可能需要/不需要前导 "\"，这里两种都尝试
-UPDATE_TASK_NAMES = [r"\CleanDesktopOrganizer\Update", r"CleanDesktopOrganizer\Update"]
 
 
 def _current_version() -> str:
@@ -45,7 +44,6 @@ class _CheckWorker(QThread):
 
     def run(self):
         try:
-            import json
             with urllib.request.urlopen(UPDATE_CHECK_URL, timeout=10) as resp:
                 body = json.loads(resp.read().decode())
             if body.get("code") == 200:
@@ -72,7 +70,6 @@ class _DownloadWorker(QThread):
                 if total_size > 0:
                     pct = min(100, int(count * block_size * 100 / total_size))
                     self.progress.emit(pct)
-
             urllib.request.urlretrieve(self._url, self._dest, _reporthook)
             self.progress.emit(100)
             self.finished.emit(self._dest)
@@ -80,165 +77,26 @@ class _DownloadWorker(QThread):
             self.error.emit(str(e))
 
 
-def _programdata_dir() -> str:
-    base = os.environ.get("PROGRAMDATA") or r"C:\ProgramData"
-    return os.path.join(base, APP_NAME)
-
-
-def _ensure_dir(p: str):
-    try:
-        os.makedirs(p, exist_ok=True)
-    except Exception:
-        pass
-
-
-def _update_work_dir() -> str:
-    """
-    全局安装场景下，Program Files 不可写；更新文件与请求文件统一放 ProgramData。
-    该目录应由安装器创建并赋予 Users Modify 权限。
-    """
-    d = os.path.join(_programdata_dir(), "updates")
-    _ensure_dir(d)
-    if os.path.isdir(d):
-        return d
-    return tempfile.gettempdir()
-
-
-def _request_file_path() -> str:
-    d = _programdata_dir()
-    _ensure_dir(d)
-    return os.path.join(d, "update_request.json")
-
-
-def _task_exists(name: str) -> bool:
-    try:
-        r = subprocess.run(
-            ["schtasks", "/Query", "/TN", name],
-            capture_output=True,
-            text=True,
-            encoding="utf-8",
-            errors="replace",
-            creationflags=subprocess.CREATE_NO_WINDOW,
-        )
-        return r.returncode == 0
-    except Exception:
-        return False
-
-
-def _run_update_task() -> bool:
-    for name in UPDATE_TASK_NAMES:
-        if not _task_exists(name):
-            continue
-        try:
-            r = subprocess.run(
-                ["schtasks", "/Run", "/TN", name],
-                capture_output=True,
-                text=True,
-                encoding="utf-8",
-                errors="replace",
-                creationflags=subprocess.CREATE_NO_WINDOW,
-            )
-            if r.returncode == 0:
-                return True
-        except Exception:
-            continue
-    return False
-
-
-def _run_update_helper_elevated() -> bool:
-    """
-    当计划任务不存在时的兜底：以管理员权限运行 update_helper.exe。
-    这会触发 UAC（无法完全静默），但能保证更新能完成。
-    """
-    if sys.platform != "win32":
-        return False
-    try:
-        helper = os.path.join(os.path.dirname(sys.executable), "update_helper.exe")
-        if not os.path.isfile(helper):
-            return False
-        # ShellExecuteW 返回值 > 32 表示成功启动
-        r = ctypes.windll.shell32.ShellExecuteW(None, "runas", helper, None, None, 0)
-        return int(r) > 32
-    except Exception:
-        return False
-
-
-def _run_elevated_copy_and_restart(src: str, dst: str, pid: int) -> bool:
-    """
-    不依赖 update_helper.exe 的兜底方案：
-    直接用管理员权限启动 PowerShell，等待原进程退出后覆盖 dst 并重启。
-    """
-    if sys.platform != "win32":
-        return False
-    try:
-        ps = rf"""
-$pid_target = {int(pid)}
-$src = '{str(src).replace("'", "''")}'
-$dst = '{str(dst).replace("'", "''")}'
-
-$waited = 0
-while ((Get-Process -Id $pid_target -ErrorAction SilentlyContinue) -and $waited -lt 60) {{
-  Start-Sleep -Milliseconds 500
-  $waited += 0.5
-}}
-
-$ok = $false
-for ($i = 0; $i -lt 20; $i++) {{
-  try {{
-    Copy-Item -Path $src -Destination $dst -Force
-    $ok = $true
-    break
-  }} catch {{
-    Start-Sleep -Milliseconds 800
-  }}
-}}
-
-if ($ok) {{
-  Remove-Item $src -Force -ErrorAction SilentlyContinue
-  Start-Process $dst
-}}
-"""
-        # PowerShell -EncodedCommand 需要 UTF-16LE + base64
-        enc = base64.b64encode(ps.encode("utf-16le")).decode("ascii")
-        r = ctypes.windll.shell32.ShellExecuteW(
-            None,
-            "runas",
-            "powershell",
-            f"-NoProfile -NonInteractive -ExecutionPolicy Bypass -EncodedCommand {enc}",
-            None,
-            0,
-        )
-        return int(r) > 32
-    except Exception:
-        return False
-
-
 def _replace_and_restart(new_exe: str):
-    """
-    onedir 模式：只替换 exe 本身，dll 等文件不变。
-    用 PowerShell 后台脚本等待原进程退出后替换并重启，完全无窗口。
-    """
     if not getattr(sys, "frozen", False):
         subprocess.Popen([new_exe])
         QApplication.quit()
         return
 
     current_exe = sys.executable
-    pid         = os.getpid()
+    pid = os.getpid()
 
     ps_script = f"""
 $pid_target = {pid}
 $src = '{new_exe.replace(chr(92), chr(92)*2)}'
 $dst = '{current_exe.replace(chr(92), chr(92)*2)}'
 
-# 等待原进程退出，最多 30 秒
 $waited = 0
 while ((Get-Process -Id $pid_target -ErrorAction SilentlyContinue) -and $waited -lt 30) {{
     Start-Sleep -Milliseconds 500
     $waited += 0.5
 }}
 
-# 重试覆盖，最多 10 次
 $ok = $false
 for ($i = 0; $i -lt 10; $i++) {{
     try {{
@@ -255,7 +113,6 @@ if ($ok) {{
     Start-Process $dst
 }}
 """
-
     tmp = tempfile.NamedTemporaryFile(
         delete=False, suffix=".ps1", mode="w", encoding="utf-8"
     )
@@ -263,11 +120,9 @@ if ($ok) {{
     tmp.close()
 
     subprocess.Popen(
-        [
-            "powershell", "-WindowStyle", "Hidden",
-            "-NonInteractive", "-ExecutionPolicy", "Bypass",
-            "-File", tmp.name,
-        ],
+        ["powershell", "-WindowStyle", "Hidden",
+         "-NonInteractive", "-ExecutionPolicy", "Bypass",
+         "-File", tmp.name],
         creationflags=subprocess.DETACHED_PROCESS | subprocess.CREATE_NO_WINDOW,
     )
     QApplication.quit()
@@ -292,7 +147,7 @@ class Updater(QObject):
 
         if not _is_newer(latest, current):
             if not self._silent:
-                QMessageBox.information(self._parent_widget, "检查更新", f"当前已是最新版本 v{current}")
+                dialog_style.information(self._parent_widget, "检查更新", f"当前已是最新版本 v{current}")
             return
 
         notes = data.get("releaseNotes", "") or ""
@@ -301,24 +156,21 @@ class Updater(QObject):
             msg += f"\n\n更新内容：\n{notes}"
         msg += "\n\n是否立即下载更新？"
 
-        ret = QMessageBox.question(
-            self._parent_widget, "发现新版本", msg,
-            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
-            QMessageBox.StandardButton.Yes,
-        )
+        ret = dialog_style.question(self._parent_widget, "发现新版本", msg)
         if ret != QMessageBox.StandardButton.Yes:
             return
 
-        self._url = url
         self._download(url)
 
     def _on_check_error(self, err: str):
         if not self._silent:
-            QMessageBox.warning(self._parent_widget, "检查更新失败", f"无法连接更新服务器：\n{err}")
+            dialog_style.warning(self._parent_widget, "检查更新失败", f"无法连接更新服务器：\n{err}")
 
     def _download(self, url: str):
-        # 全局安装：不要下载到安装目录（通常在 Program Files，不可写）
-        dest_dir = _update_work_dir() if getattr(sys, "frozen", False) else tempfile.gettempdir()
+        if getattr(sys, "frozen", False):
+            dest_dir = os.path.dirname(sys.executable)
+        else:
+            dest_dir = tempfile.gettempdir()
         dest = os.path.join(dest_dir, "_update_new.exe")
 
         self._progress = QProgressDialog("正在下载更新...", "取消", 0, 100, self._parent_widget)
@@ -335,57 +187,8 @@ class Updater(QObject):
 
     def _on_download_done(self, path: str):
         self._progress.close()
-        # frozen 且全局安装：交给计划任务（最高权限）覆盖安装目录 exe
-        if getattr(sys, "frozen", False):
-            try:
-                req = {
-                    "src": path,
-                    "dst": sys.executable,
-                    "pid": os.getpid(),
-                    "restart": True,
-                }
-                with open(_request_file_path(), "w", encoding="utf-8") as f:
-                    json.dump(req, f, ensure_ascii=False)
-            except Exception as e:
-                QMessageBox.critical(self._parent_widget, "更新失败", f"无法准备更新任务：\n{e}")
-                return
-
-            if _run_update_task():
-                QApplication.quit()
-                return
-
-            # 兜底策略 1：计划任务不存在时，提示并可通过 UAC 直接运行 update_helper.exe 完成一次更新
-            if _run_update_helper_elevated():
-                QApplication.quit()
-                return
-
-            # 兜底策略 1.5：如果安装目录里没有 update_helper.exe，则直接用管理员 PowerShell 完成覆盖
-            if _run_elevated_copy_and_restart(path, sys.executable, os.getpid()):
-                QApplication.quit()
-                return
-
-            # 兜底策略 2：如果安装目录可写（非常少见），尝试旧的自替换方式
-            try:
-                can_write = os.access(sys.executable, os.W_OK)
-            except Exception:
-                can_write = False
-            if can_write:
-                _replace_and_restart(path)
-                return
-
-            QMessageBox.critical(
-                self._parent_widget,
-                "更新失败",
-                "已下载更新，但未找到/无法运行更新计划任务（需要管理员权限）。\n\n"
-                "请尝试：\n"
-                "1) 以管理员身份重新安装一次安装包（用于创建更新计划任务）\n"
-                "2) 或在“任务计划程序”检查是否存在任务：CleanDesktopOrganizer\\Update\n"
-                "3) 也可尝试用管理员权限运行 update_helper.exe 完成一次更新",
-            )
-            return
-
         _replace_and_restart(path)
 
     def _on_download_error(self, err: str):
         self._progress.close()
-        QMessageBox.critical(self._parent_widget, "下载失败", f"下载更新失败：\n{err}")
+        dialog_style.warning(self._parent_widget, "下载失败", f"下载更新失败：\n{err}")