refactor: 删除 tkinter app_gui.py, 完全切到 Web UI 作为唯一入口

## 决策背景

用户反馈 "windows GUI 太难看了, 还是完全用 webUI 吧, 用户可以选择"。

tkinter app_gui.py (PR #107 引入, 929 行) 的问题:
- 中文字体下渲染糊 ("WeChat Decrypt 工具箱" 标题模糊)
- 90 年代 Windows 控件风格, 不暗色不现代
- 只能跑 Windows, 不跨平台
- 没法远程访问
- 跟 Web UI 维护两套, 重复

Web UI (monitor_web.py) 已经完全对齐功能:
- 8 个工具按钮 (3 tab 分组: 个人微信 / 企微 / 工具)
- 终止按钮 + 实时日志推送
- 导出筛选模态框 (会话搜索/复选/格式选择, close #112)
- 跟实时消息监听共享 SSE 通道
- Lucide SVG icon 统一风格 (无 emoji)
- 暗色主题 + design tokens + 玻璃质感顶栏

## 改动

### 删除
- \`app_gui.py\` (929 行 tkinter GUI)

### monitor_web.py
拆 \`main()\` → \`_start_monitor_if_ready()\` + 精简的 \`main()\`:

之前: keys 不存在 → \`sys.exit(1)\` 直接挂

现在: keys 不存在 → 跳过监听线程启动, 仅起 Web UI 服务。
用户从工具箱点 "① 提取密钥 + 解密数据库" 跑完后重启进程, 监听自动激活。
这样 exe 用户第一次双击时不会报错挂掉, 而是看到 Web UI 工具箱可以
直接用。

新启动流程: \`_start_monitor_if_ready\` 检查 keys 文件 / session.db
密钥 / session.db 路径都 OK 才启 monitor_thread, 任一不满足都给友好
提示但不退出。

### WeChatDecrypt.spec
- 入口 \`app_gui.py\` → \`monitor_web.py\`
- datas 清单补全 (加 export_all_chats / chat_export_helpers /
  batch_decrypt_images / transcribe_chat 等之前漏的)
- hiddenimports 显式列 Crypto / zstandard / pilk (避免 PyInstaller
  漏 detect)

### build.bat
- 删 30 行重复的 --add-data 清单 (跟 .spec 漂移风险)
- 改成 \`pyinstaller --noconfirm WeChatDecrypt.spec\`
- 单一 source of truth 是 .spec
- 完成提示从 "GUI 启动" 改成 "双击 → 浏览器开 Web UI"

### EXE_USAGE.md
完全重写为 Web UI 视角:
- 快速开始: 双击 exe → 浏览器自动打开
- 工具箱 3 tab 各自能力详解
- 导出筛选模态框使用说明
- 任务终止说明
- 输出目录布局
- 远程访问说明
- 结尾解释为什么去掉了 tkinter

### README.md
- 三平台 quick-start 里 "Windows GUI / EXE" → "Windows Web UI / EXE"
- 文件清单: \`app_gui.py\` 那行 → \`monitor_web.py\` (新身份: Web UI
  总入口)
- 技术细节里 "GUI 工具箱" 章节重写: 强调 Web UI 优势 (筛选模态框 /
  终止按钮 / 跨平台 / 远程访问 / 跟监听共存) + 末尾 1 句历史说明
  解释 tkinter 已删除

## 实测

- python monitor_web.py: keys 在 → 正常启动监听 + Web UI
- python monitor_web.py: 假装 keys 不在 → 跳过监听, Web UI 仍能开,
  用户从工具箱点 "① 提取密钥" 后重启即激活
- 测试 185/185 通过

## 没改 (留 follow-up)

- 实际打包 .spec 验证 (需要 Win 跑 pyinstaller, 没在 CI 跑)
- monitor_web 启动后**自动**检测 keys 文件 mtime 变化重启监听, 不需要
  用户手动重启进程 (现在的设计是"重启进程才激活")

app_gui.py

@@ -1,939 +0,0 @@
-"""WeChat Decrypt GUI — 一键解密 / 导出消息 / 转换音频"""
-import os
-import sys
-import subprocess
-import threading
-import sqlite3
-import hashlib
-import glob as globmod
-import tkinter as tk
-from tkinter import ttk, scrolledtext
-
-# 确保工作目录为脚本所在目录（打包后也适用）
-if getattr(sys, "frozen", False):
-    BASE_DIR = os.path.dirname(sys.executable)
-else:
-    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
-os.chdir(BASE_DIR)
-os.environ["WECHAT_DECRYPT_APP_DIR"] = BASE_DIR
-
-
-# ── 子任务入口（当以 --task 参数调用时直接执行对应脚本） ──────────────────────
-
-# 显式导入：让 PyInstaller 收集子脚本需要的所有依赖
-# （这些脚本通过 exec 动态加载，PyInstaller 无法自动检测）
-import importlib.util  # noqa: F401 - used for dynamic loading
-if False:  # noqa: never executed, only for PyInstaller dependency detection
-    import sqlite3, hashlib, csv, json, re, glob, tempfile  # noqa: F401
-    import xml.etree.ElementTree  # noqa: F401
-    import functools, platform, ctypes, ctypes.wintypes  # noqa: F401
-    import zstandard  # noqa: F401
-    import pilk  # noqa: F401
-    import Crypto, Crypto.Cipher, Crypto.Cipher.AES, Crypto.Util.Padding  # noqa: F401
-    import wxwork_crypto  # noqa: F401
-    import export_wxwork_messages  # noqa: F401
-
-
-def _run_subtask(task: str):
-    """在子进程中被调用，直接执行对应脚本逻辑"""
-    # 强制 stdout/stderr 为 UTF-8
-    if sys.platform == "win32":
-        for s in (sys.stdout, sys.stderr):
-            if hasattr(s, "reconfigure"):
-                s.reconfigure(encoding="utf-8", errors="replace")
-
-    # onefile: _MEIPASS 临时目录; onedir: _internal/; 开发: BASE_DIR
-    if getattr(sys, "frozen", False):
-        script_dir = getattr(sys, "_MEIPASS", os.path.join(os.path.dirname(sys.executable), "_internal"))
-    else:
-        script_dir = BASE_DIR
-
-    # 让 import 能找到脚本同目录的模块
-    if script_dir not in sys.path:
-        sys.path.insert(0, script_dir)
-    if BASE_DIR not in sys.path:
-        sys.path.insert(0, BASE_DIR)
-
-    mapping = {
-        "decrypt": "main.py",
-        "export": "export_messages.py",
-        "voice": "voice_to_mp3.py",
-        "find_image_key": "find_image_key.py",
-        "decrypt_sns": "decrypt_sns.py",
-        "export_sns": "export_sns.py",
-        "find_wxwork_keys": "find_wxwork_keys.py",
-        "decrypt_wxwork": "decrypt_wxwork_db.py",
-        "export_wxwork": "export_wxwork_messages.py",
-    }
-    script = mapping.get(task)
-    if not script:
-        print(f"未知任务: {task}", flush=True)
-        sys.exit(1)
-
-    script_path = os.path.join(script_dir, script)
-    if not os.path.exists(script_path):
-        # 开发模式回退到 BASE_DIR
-        script_path = os.path.join(BASE_DIR, script)
-    if not os.path.exists(script_path):
-        print(f"脚本不存在: {script_path}", flush=True)
-        sys.exit(1)
-
-    # 将 decrypt 命令传给 main.py
-    if task == "decrypt":
-        sys.argv = ["main.py", "decrypt"]
-    elif task == "find_image_key":
-        sys.argv = ["find_image_key.py"]
-    elif task == "find_wxwork_keys":
-        sys.argv = ["find_wxwork_keys.py"]
-    elif task == "decrypt_wxwork":
-        sys.argv = ["decrypt_wxwork_db.py"]
-    elif task == "export_wxwork":
-        sys.argv = ["export_wxwork_messages.py"]
-    else:
-        sys.argv = [script]
-
-    # 设置环境变量，让 config.py 等脚本知道真正的应用目录
-    os.environ["WECHAT_DECRYPT_APP_DIR"] = BASE_DIR
-    os.chdir(BASE_DIR)
-
-    # 加载并执行脚本
-    spec = importlib.util.spec_from_file_location("__main__", script_path)
-    mod = importlib.util.module_from_spec(spec)
-    mod.__name__ = "__main__"
-    spec.loader.exec_module(mod)
-
-
-# ── 检查是否为子任务模式 ──────────────────────────────────────────────────────
-if len(sys.argv) >= 3 and sys.argv[1] == "--task":
-    _run_subtask(sys.argv[2])
-    sys.exit(0)
-
-# ── GUI 模式：隐藏控制台窗口 ────────────────────────────────────────────────
-if sys.platform == "win32":
-    try:
-        import ctypes
-        ctypes.windll.user32.ShowWindow(ctypes.windll.kernel32.GetConsoleWindow(), 0)
-    except Exception:
-        pass
-
-
-# ── 联系人发现 ────────────────────────────────────────────────────────────────
-
-def _load_contact_map(decrypted_dir):
-    """从 contact.db 加载联系人映射 {username: {remark, nick_name, ...}}"""
-    contact_map = {}
-    db_path = os.path.join(decrypted_dir, "contact", "contact.db")
-    if not os.path.exists(db_path):
-        return contact_map
-    try:
-        conn = sqlite3.connect(db_path)
-        for uname, alias, remark, nick_name in conn.execute(
-            "SELECT username, alias, remark, nick_name FROM contact"
-        ):
-            contact_map[uname] = {
-                "remark": remark or "",
-                "nick_name": nick_name or "",
-            }
-        conn.close()
-    except Exception:
-        pass
-    return contact_map
-
-
-def _display_name(username, contact_map):
-    info = contact_map.get(username, {})
-    return info.get("remark") or info.get("nick_name") or username
-
-
-def _discover_contacts():
-    """扫描所有联系人/会话，返回 (contacts, has_voice)
-    contacts: [(username, display_name), ...]
-    has_voice: 是否存在语音数据
-    """
-    from config import load_config
-    cfg = load_config()
-    decrypted_dir = cfg["decrypted_dir"]
-
-    if not os.path.isdir(decrypted_dir):
-        raise FileNotFoundError(f"解密目录不存在: {decrypted_dir}\n请先运行「解密数据库」")
-
-    contact_map = _load_contact_map(decrypted_dir)
-    usernames = set()
-    has_voice = False
-
-    # 从消息数据库扫描
-    msg_dir = os.path.join(decrypted_dir, "message")
-    if os.path.isdir(msg_dir):
-        db_files = [
-            f for f in globmod.glob(os.path.join(msg_dir, "message_*.db"))
-            if not f.endswith(("_fts.db", "_resource.db"))
-        ]
-        print(f"找到 {len(db_files)} 个消息数据库", flush=True)
-        for db_path in db_files:
-            try:
-                conn = sqlite3.connect(db_path)
-                hash_to_uname = {}
-                for row in conn.execute("SELECT rowid, user_name FROM Name2Id"):
-                    uname = row[1]
-                    if uname:
-                        h = hashlib.md5(uname.encode()).hexdigest()
-                        hash_to_uname[h] = uname
-                for (tbl,) in conn.execute(
-                    "SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'Msg_%'"
-                ):
-                    h = tbl[4:]
-                    uname = hash_to_uname.get(h)
-                    if uname:
-                        usernames.add(uname)
-                conn.close()
-            except Exception as e:
-                print(f"  读取 {os.path.basename(db_path)} 失败: {e}", flush=True)
-                continue
-    else:
-        print(f"消息目录不存在: {msg_dir}", flush=True)
-
-    # 从语音数据库扫描
-    voice_db = os.path.join(msg_dir, "media_0.db")
-    if os.path.exists(voice_db):
-        try:
-            conn = sqlite3.connect(voice_db)
-            name_map = {}
-            for rowid, uname in conn.execute("SELECT rowid, user_name FROM Name2Id"):
-                name_map[rowid] = uname
-            for (cid,) in conn.execute("SELECT DISTINCT chat_name_id FROM VoiceInfo"):
-                uname = name_map.get(cid)
-                if uname:
-                    usernames.add(uname)
-                    has_voice = True
-            conn.close()
-        except Exception as e:
-            print(f"  读取语音数据库失败: {e}", flush=True)
-
-    print(f"共发现 {len(usernames)} 个会话", flush=True)
-    result = [(u, _display_name(u, contact_map)) for u in usernames]
-    result.sort(key=lambda x: x[1].lower())
-    return result, has_voice
-
-
-# ── 导出选项对话框 ──────────────────────────────────────────────────────────
-
-class ExportOptionsDialog(tk.Toplevel):
-    def __init__(self, parent, contacts, has_voice=False):
-        """contacts: [(username, display_name), ...]
-        has_voice: 是否检测到语音数据
-        """
-        super().__init__(parent)
-        self.title("导出选项")
-        self.geometry("460x600")
-        self.transient(parent)
-        self.grab_set()
-        self.result = None
-        self.configure(bg="#f0f0f0")
-        self._contacts = contacts
-        self._vars = {}  # username -> BooleanVar
-
-        # ── 导出格式 ──
-        fmt_frame = ttk.LabelFrame(self, text="导出格式", padding=6)
-        fmt_frame.pack(fill="x", padx=12, pady=(10, 4))
-
-        self._fmt_csv = tk.BooleanVar(value=True)
-        self._fmt_html = tk.BooleanVar(value=False)
-        self._fmt_json = tk.BooleanVar(value=False)
-
-        ttk.Checkbutton(fmt_frame, text="CSV（默认）", variable=self._fmt_csv).pack(side="left", padx=10)
-        ttk.Checkbutton(fmt_frame, text="HTML", variable=self._fmt_html).pack(side="left", padx=10)
-        ttk.Checkbutton(fmt_frame, text="JSON", variable=self._fmt_json).pack(side="left", padx=10)
-
-        # ── 其他选项 ──
-        opt_frame = ttk.LabelFrame(self, text="其他选项", padding=6)
-        opt_frame.pack(fill="x", padx=12, pady=(0, 4))
-
-        self._image_var = tk.BooleanVar(value=True)
-        ttk.Checkbutton(opt_frame, text="导出并解密图片",
-                        variable=self._image_var).pack(anchor="w", padx=8)
-
-        self._sns_var = tk.BooleanVar(value=False)
-        ttk.Checkbutton(opt_frame, text="导出朋友圈动态（文案/评论）",
-                        variable=self._sns_var).pack(anchor="w", padx=8)
-
-        self._sns_media_var = tk.BooleanVar(value=False)
-        ttk.Checkbutton(opt_frame, text="  ↳ 尝试下载朋友圈媒体（可能较慢）",
-                        variable=self._sns_media_var).pack(anchor="w", padx=24)
-
-        self._voice_var = tk.BooleanVar(value=False)
-        if has_voice:
-            ttk.Checkbutton(opt_frame, text="同时转换语音为 MP3",
-                            variable=self._voice_var).pack(anchor="w", padx=8)
-
-        # ── 联系人选择 ──
-        top = ttk.Frame(self)
-        top.pack(fill="x", padx=12, pady=(4, 4))
-
-        ttk.Label(top, text=f"共 {len(contacts)} 个会话",
-                  font=("Microsoft YaHei UI", 10)).pack(side="left")
-
-        self._all_selected = True
-        self._toggle_btn = ttk.Button(top, text="取消全选", command=self._toggle_all)
-        self._toggle_btn.pack(side="right")
-
-        # 搜索框
-        search_frame = ttk.Frame(self)
-        search_frame.pack(fill="x", padx=12, pady=(0, 4))
-        self._search_var = tk.StringVar()
-        self._search_var.trace_add("write", lambda *_: self._filter_list())
-        ttk.Entry(search_frame, textvariable=self._search_var,
-                  font=("Microsoft YaHei UI", 10)).pack(fill="x")
-
-        # 滚动区域
-        container = ttk.Frame(self)
-        container.pack(fill="both", expand=True, padx=12, pady=4)
-
-        self._canvas = tk.Canvas(container, bg="#ffffff", highlightthickness=0)
-        scrollbar = ttk.Scrollbar(container, orient="vertical", command=self._canvas.yview)
-        self._inner = ttk.Frame(self._canvas)
-
-        self._inner.bind("<Configure>",
-                         lambda e: self._canvas.configure(scrollregion=self._canvas.bbox("all")))
-        self._canvas.create_window((0, 0), window=self._inner, anchor="nw")
-        self._canvas.configure(yscrollcommand=scrollbar.set)
-
-        self._canvas.pack(side="left", fill="both", expand=True)
-        scrollbar.pack(side="right", fill="y")
-
-        # 绑定鼠标滚轮
-        self._canvas.bind("<Enter>", lambda e: self._bind_mousewheel())
-        self._canvas.bind("<Leave>", lambda e: self._unbind_mousewheel())
-
-        # 创建 Checkbutton 列表
-        self._cb_widgets = []
-        for username, dname in contacts:
-            var = tk.BooleanVar(value=True)
-            self._vars[username] = var
-            label = f"{dname}  ({username})" if dname != username else username
-            cb = ttk.Checkbutton(self._inner, text=label, variable=var)
-            cb.pack(anchor="w", padx=6, pady=1)
-            self._cb_widgets.append((username, dname, cb))
-
-        # 底部按钮
-        bottom = ttk.Frame(self)
-        bottom.pack(fill="x", padx=12, pady=(4, 10))
-
-        ttk.Button(bottom, text="确定", command=self._on_ok).pack(side="right", padx=4)
-        ttk.Button(bottom, text="取消", command=self._on_cancel).pack(side="right", padx=4)
-
-    def _bind_mousewheel(self):
-        self._canvas.bind_all("<MouseWheel>",
-                              lambda e: self._canvas.yview_scroll(-1 * (e.delta // 120), "units"))
-
-    def _unbind_mousewheel(self):
-        self._canvas.unbind_all("<MouseWheel>")
-
-    def _toggle_all(self):
-        self._all_selected = not self._all_selected
-        for var in self._vars.values():
-            var.set(self._all_selected)
-        self._toggle_btn.configure(text="取消全选" if self._all_selected else "全选")
-
-    def _filter_list(self):
-        keyword = self._search_var.get().strip().lower()
-        for username, dname, cb in self._cb_widgets:
-            if not keyword or keyword in dname.lower() or keyword in username.lower():
-                cb.pack(anchor="w", padx=6, pady=1)
-            else:
-                cb.pack_forget()
-
-    def _on_ok(self):
-        formats = []
-        if self._fmt_csv.get():
-            formats.append("csv")
-        if self._fmt_html.get():
-            formats.append("html")
-        if self._fmt_json.get():
-            formats.append("json")
-
-        if not formats and not self._voice_var.get() and not self._sns_var.get():
-            from tkinter import messagebox
-            messagebox.showwarning("提示", "请至少选择一种导出格式、朋友圈导出或语音转换", parent=self)
-            return
-
-        self.result = {
-            "contacts": [u for u, var in self._vars.items() if var.get()],
-            "formats": formats,
-            "include_voice": self._voice_var.get(),
-            "include_images": self._image_var.get(),
-            "include_sns": self._sns_var.get(),
-            "include_sns_media": self._sns_media_var.get(),
-        }
-        self.destroy()
-
-    def _on_cancel(self):
-        self.result = None
-        self.destroy()
-
-
-class WxworkExportOptionsDialog(tk.Toplevel):
-    def __init__(self, parent, conversations):
-        """conversations: [{conversation_id, display_name, kind, message_count, last_time}, ...]"""
-        super().__init__(parent)
-        self.title("企业微信导出选项")
-        self.geometry("560x620")
-        self.transient(parent)
-        self.grab_set()
-        self.result = None
-        self.configure(bg="#f0f0f0")
-        self._conversations = conversations
-        self._vars = {}
-
-        fmt_frame = ttk.LabelFrame(self, text="导出格式", padding=6)
-        fmt_frame.pack(fill="x", padx=12, pady=(10, 4))
-
-        self._fmt_csv = tk.BooleanVar(value=True)
-        self._fmt_html = tk.BooleanVar(value=False)
-        self._fmt_json = tk.BooleanVar(value=False)
-
-        ttk.Checkbutton(fmt_frame, text="CSV（默认）", variable=self._fmt_csv).pack(side="left", padx=10)
-        ttk.Checkbutton(fmt_frame, text="HTML", variable=self._fmt_html).pack(side="left", padx=10)
-        ttk.Checkbutton(fmt_frame, text="JSON", variable=self._fmt_json).pack(side="left", padx=10)
-
-        top = ttk.Frame(self)
-        top.pack(fill="x", padx=12, pady=(4, 4))
-        ttk.Label(top, text=f"共 {len(conversations)} 个企业微信会话",
-                  font=("Microsoft YaHei UI", 10)).pack(side="left")
-
-        self._all_selected = True
-        self._toggle_btn = ttk.Button(top, text="取消全选", command=self._toggle_all)
-        self._toggle_btn.pack(side="right")
-
-        search_frame = ttk.Frame(self)
-        search_frame.pack(fill="x", padx=12, pady=(0, 4))
-        self._search_var = tk.StringVar()
-        self._search_var.trace_add("write", lambda *_: self._filter_list())
-        ttk.Entry(search_frame, textvariable=self._search_var,
-                  font=("Microsoft YaHei UI", 10)).pack(fill="x")
-
-        container = ttk.Frame(self)
-        container.pack(fill="both", expand=True, padx=12, pady=4)
-
-        self._canvas = tk.Canvas(container, bg="#ffffff", highlightthickness=0)
-        scrollbar = ttk.Scrollbar(container, orient="vertical", command=self._canvas.yview)
-        self._inner = ttk.Frame(self._canvas)
-        self._inner.bind("<Configure>",
-                         lambda e: self._canvas.configure(scrollregion=self._canvas.bbox("all")))
-        self._canvas.create_window((0, 0), window=self._inner, anchor="nw")
-        self._canvas.configure(yscrollcommand=scrollbar.set)
-        self._canvas.pack(side="left", fill="both", expand=True)
-        scrollbar.pack(side="right", fill="y")
-
-        self._canvas.bind("<Enter>", lambda e: self._bind_mousewheel())
-        self._canvas.bind("<Leave>", lambda e: self._unbind_mousewheel())
-
-        self._cb_widgets = []
-        for conv in conversations:
-            cid = conv["conversation_id"]
-            var = tk.BooleanVar(value=True)
-            self._vars[cid] = var
-            last_time = self._format_time(conv.get("last_time"))
-            suffix = f" · {last_time}" if last_time else ""
-            label = (
-                f"[{conv.get('kind', '会话')}] {conv.get('display_name') or cid}"
-                f" · {conv.get('message_count', 0)} 条{suffix}"
-            )
-            cb = ttk.Checkbutton(self._inner, text=label, variable=var)
-            cb.pack(anchor="w", padx=6, pady=1)
-            self._cb_widgets.append((cid, label.lower(), cb))
-
-        bottom = ttk.Frame(self)
-        bottom.pack(fill="x", padx=12, pady=(4, 10))
-        ttk.Button(bottom, text="确定", command=self._on_ok).pack(side="right", padx=4)
-        ttk.Button(bottom, text="取消", command=self._on_cancel).pack(side="right", padx=4)
-
-    def _format_time(self, value):
-        if not value:
-            return ""
-        try:
-            from datetime import datetime
-            return datetime.fromtimestamp(int(value)).strftime("%Y-%m-%d")
-        except Exception:
-            return ""
-
-    def _bind_mousewheel(self):
-        self._canvas.bind_all("<MouseWheel>",
-                              lambda e: self._canvas.yview_scroll(-1 * (e.delta // 120), "units"))
-
-    def _unbind_mousewheel(self):
-        self._canvas.unbind_all("<MouseWheel>")
-
-    def _toggle_all(self):
-        self._all_selected = not self._all_selected
-        for var in self._vars.values():
-            var.set(self._all_selected)
-        self._toggle_btn.configure(text="取消全选" if self._all_selected else "全选")
-
-    def _filter_list(self):
-        keyword = self._search_var.get().strip().lower()
-        for _cid, label, cb in self._cb_widgets:
-            if not keyword or keyword in label:
-                cb.pack(anchor="w", padx=6, pady=1)
-            else:
-                cb.pack_forget()
-
-    def _on_ok(self):
-        formats = []
-        if self._fmt_csv.get():
-            formats.append("csv")
-        if self._fmt_html.get():
-            formats.append("html")
-        if self._fmt_json.get():
-            formats.append("json")
-        if not formats:
-            from tkinter import messagebox
-            messagebox.showwarning("提示", "请至少选择一种导出格式", parent=self)
-            return
-        self.result = {
-            "conversations": [cid for cid, var in self._vars.items() if var.get()],
-            "formats": formats,
-        }
-        self.destroy()
-
-    def _on_cancel(self):
-        self.result = None
-        self.destroy()
-
-
-class App(tk.Tk):
-    def __init__(self):
-        super().__init__()
-        self.title("WeChat Decrypt 工具箱")
-        self.geometry("820x600")
-        self.resizable(True, True)
-        self.configure(bg="#f0f0f0")
-        self._running = False
-        self._auto_export = False
-        self._selected_contacts = None
-        self._export_formats = None
-        self._include_voice = False
-        self._include_images = True
-        self._include_sns = False
-        self._include_sns_media = False
-        self._selected_wxwork_conversations = None
-        self._wxwork_export_formats = None
-
-        self._build_ui()
-
-    # ── UI 构建 ────────────────────────────────────────────────────────────
-    def _build_ui(self):
-        style = ttk.Style(self)
-        style.theme_use("clam")
-        style.configure("Big.TButton", font=("Microsoft YaHei UI", 11), padding=(16, 10))
-        style.configure("TLabel", font=("Microsoft YaHei UI", 10), background="#f0f0f0")
-
-        # 标题
-        title = ttk.Label(self, text="WeChat Decrypt 工具箱", font=("Microsoft YaHei UI", 16, "bold"))
-        title.pack(pady=(14, 6))
-
-        # 按钮区域
-        btn_frame = ttk.Frame(self)
-        btn_frame.pack(fill="x", padx=20, pady=(4, 4))
-
-        self.btn_decrypt = ttk.Button(
-            btn_frame, text="① 微信解密", style="Big.TButton",
-            command=lambda: self._run_task("decrypt")
-        )
-        self.btn_decrypt.pack(side="left", expand=True, fill="x", padx=4)
-
-        self.btn_imgkey = ttk.Button(
-            btn_frame, text="② 图片密钥", style="Big.TButton",
-            command=lambda: self._run_task("find_image_key")
-        )
-        self.btn_imgkey.pack(side="left", expand=True, fill="x", padx=4)
-
-        self.btn_export = ttk.Button(
-            btn_frame, text="③ 导出数据", style="Big.TButton",
-            command=lambda: self._run_task("export")
-        )
-        self.btn_export.pack(side="left", expand=True, fill="x", padx=4)
-
-        self.btn_sns = ttk.Button(
-            btn_frame, text="④ 朋友圈图片", style="Big.TButton",
-            command=lambda: self._run_task("decrypt_sns")
-        )
-        self.btn_sns.pack(side="left", expand=True, fill="x", padx=4)
-
-        wxwork_frame = ttk.Frame(self)
-        wxwork_frame.pack(fill="x", padx=20, pady=(0, 6))
-
-        self.btn_wxwork = ttk.Button(
-            wxwork_frame, text="⑤ 企业微信解密", style="Big.TButton",
-            command=lambda: self._run_task("wxwork_decrypt")
-        )
-        self.btn_wxwork.pack(side="left", expand=True, fill="x", padx=4)
-
-        self.btn_wxwork_export = ttk.Button(
-            wxwork_frame, text="⑥ 企业微信导出", style="Big.TButton",
-            command=lambda: self._run_task("wxwork_export")
-        )
-        self.btn_wxwork_export.pack(side="left", expand=True, fill="x", padx=4)
-
-        # 提示信息
-        tips_frame = ttk.LabelFrame(self, text="使用提示", padding=6)
-        tips_frame.pack(fill="x", padx=20, pady=(0, 4))
-        tips_text = (
-            "• 微信解密：需要微信正在运行中，会自动提取密钥并解密\n"
-            "• 查找图片密钥：先在微信中打开 2-3 张图片查看，然后立即运行\n"
-            "• 导出数据：选择联系人和格式，可同时导出消息/图片/语音\n"
-            "• 朋友圈图片：解密朋友圈缓存图片（_t缩略图自动跳过）\n"
-            "• 企业微信解密：需要企业微信正在运行中，输出到 wxwork_decrypted/\n"
-            "• 企业微信导出：选择某个人或群，输出 CSV / HTML / JSON 到 wxwork_export/"
-        )
-        ttk.Label(tips_frame, text=tips_text, font=("Microsoft YaHei UI", 9),
-                  wraplength=760, justify="left").pack(anchor="w")
-
-        # 进度条
-        self.progress = ttk.Progressbar(self, mode="indeterminate")
-        self.progress.pack(fill="x", padx=20, pady=(0, 4))
-
-        # 日志区域
-        log_label = ttk.Label(self, text="运行日志：")
-        log_label.pack(anchor="w", padx=20)
-
-        self.log = scrolledtext.ScrolledText(
-            self, wrap="word", height=18,
-            font=("Consolas", 10), bg="#1e1e1e", fg="#d4d4d4",
-            insertbackground="#fff", state="disabled"
-        )
-        self.log.pack(fill="both", expand=True, padx=20, pady=(2, 10))
-
-        # 底部状态
-        self.status_var = tk.StringVar(value="就绪")
-        status = ttk.Label(self, textvariable=self.status_var, font=("Microsoft YaHei UI", 9))
-        status.pack(anchor="w", padx=20, pady=(0, 8))
-
-    # ── 日志写入 ───────────────────────────────────────────────────────────
-    def _log(self, text: str):
-        self.log.configure(state="normal")
-        self.log.insert("end", text)
-        self.log.see("end")
-        self.log.configure(state="disabled")
-
-    def _clear_log(self):
-        self.log.configure(state="normal")
-        self.log.delete("1.0", "end")
-        self.log.configure(state="disabled")
-
-    # ── 按钮状态 ───────────────────────────────────────────────────────────
-    def _set_buttons(self, enabled: bool):
-        state = "normal" if enabled else "disabled"
-        self.btn_decrypt.configure(state=state)
-        self.btn_imgkey.configure(state=state)
-        self.btn_export.configure(state=state)
-        self.btn_sns.configure(state=state)
-        self.btn_wxwork.configure(state=state)
-        self.btn_wxwork_export.configure(state=state)
-
-    # ── 任务调度 ───────────────────────────────────────────────────────────
-    def _run_task(self, task: str):
-        if self._running:
-            return
-        self._running = True
-        self._selected_contacts = None
-        self._export_formats = None
-        self._include_voice = False
-        self._include_sns = False
-        self._include_sns_media = False
-        self._selected_wxwork_conversations = None
-        self._wxwork_export_formats = None
-        self._clear_log()
-        self._set_buttons(False)
-
-        if task == "export":
-            self.progress.start(15)
-            self.status_var.set("正在扫描联系人...")
-            threading.Thread(
-                target=self._discover_and_select, daemon=True
-            ).start()
-        elif task == "find_image_key":
-            self.progress.start(15)
-            self.status_var.set("正在扫描微信进程内存...")
-            threading.Thread(target=self._exec_task, args=(task,), daemon=True).start()
-        elif task == "decrypt_sns":
-            self.progress.start(15)
-            self.status_var.set("正在解密朋友圈图片...")
-            threading.Thread(target=self._exec_task, args=(task,), daemon=True).start()
-        elif task == "wxwork_decrypt":
-            self.progress.start(15)
-            self.status_var.set("正在解密企业微信数据库...")
-            threading.Thread(target=self._exec_wxwork_decrypt, daemon=True).start()
-        elif task == "wxwork_export":
-            self.progress.start(15)
-            self.status_var.set("正在扫描企业微信会话...")
-            threading.Thread(target=self._discover_wxwork_and_select, daemon=True).start()
-        else:
-            self.progress.start(15)
-            labels = {"decrypt": "解密数据库"}
-            self.status_var.set(f"正在{labels.get(task, task)}...")
-            threading.Thread(target=self._exec_task, args=(task,), daemon=True).start()
-
-    def _discover_and_select(self):
-        """后台扫描联系人，然后在主线程弹出选择对话框"""
-        try:
-            contacts, has_voice = _discover_contacts()
-        except Exception as e:
-            self.after(0, self._log, f"扫描联系人失败: {e}\n")
-            self.after(0, self._on_task_done)
-            return
-
-        if not contacts:
-            self.after(0, self._log, "未找到任何联系人/会话\n")
-            self.after(0, self._on_task_done)
-            return
-
-        self.after(0, self._show_contact_dialog, contacts, has_voice)
-
-    def _show_contact_dialog(self, contacts, has_voice):
-        self.progress.stop()
-        self.status_var.set(f"请选择导出选项 ({len(contacts)} 个会话)")
-
-        dlg = ExportOptionsDialog(self, contacts, has_voice=has_voice)
-        self.wait_window(dlg)
-
-        if dlg.result is None:
-            self._on_task_done()
-            return
-
-        if not dlg.result["contacts"]:
-            self._log("未选择任何联系人\n")
-            self._on_task_done()
-            return
-
-        self._selected_contacts = dlg.result["contacts"]
-        self._export_formats = dlg.result["formats"]
-        self._include_voice = dlg.result["include_voice"]
-        self._include_images = dlg.result["include_images"]
-        self._include_sns = dlg.result["include_sns"]
-        self._include_sns_media = dlg.result["include_sns_media"]
-
-        self._clear_log()
-        self.progress.start(15)
-        n_sel = len(dlg.result["contacts"])
-        parts = []
-        if self._export_formats:
-            parts.append(f"导出 {'/'.join(f.upper() for f in self._export_formats)}")
-        if self._include_sns:
-            parts.append("朋友圈")
-        if self._include_voice:
-            parts.append("转换语音")
-        action = " + ".join(parts) or "处理"
-        self.status_var.set(f"正在{action}...（{n_sel}/{len(contacts)} 个联系人）")
-        threading.Thread(target=self._exec_combined, daemon=True).start()
-
-    def _discover_wxwork_and_select(self):
-        """后台扫描企业微信会话，然后在主线程弹出选择对话框"""
-        try:
-            from export_wxwork_messages import discover_conversations
-            conversations = discover_conversations()
-        except Exception as e:
-            self.after(0, self._log, f"扫描企业微信会话失败: {e}\n")
-            self.after(0, self._on_task_done)
-            return
-
-        if not conversations:
-            self.after(0, self._log, "未找到任何企业微信会话，请先运行「企业微信解密」\n")
-            self.after(0, self._on_task_done)
-            return
-
-        self.after(0, self._show_wxwork_dialog, conversations)
-
-    def _show_wxwork_dialog(self, conversations):
-        self.progress.stop()
-        self.status_var.set(f"请选择企业微信导出选项 ({len(conversations)} 个会话)")
-
-        dlg = WxworkExportOptionsDialog(self, conversations)
-        self.wait_window(dlg)
-
-        if dlg.result is None:
-            self._on_task_done()
-            return
-
-        if not dlg.result["conversations"]:
-            self._log("未选择任何企业微信会话\n")
-            self._on_task_done()
-            return
-
-        self._selected_wxwork_conversations = dlg.result["conversations"]
-        self._wxwork_export_formats = dlg.result["formats"]
-
-        self._clear_log()
-        self.progress.start(15)
-        n_sel = len(dlg.result["conversations"])
-        self.status_var.set(
-            f"正在导出企业微信 {'/'.join(f.upper() for f in self._wxwork_export_formats)}..."
-            f"（{n_sel}/{len(conversations)} 个会话）"
-        )
-        threading.Thread(target=self._exec_wxwork_export, daemon=True).start()
-
-    # ── 子进程执行 ─────────────────────────────────────────────────────────
-    def _run_subprocess(self, task: str) -> int:
-        """运行子进程，返回退出码
-
-        打包成 exe (`sys.frozen=True`) 时 sys.executable 就是 exe 本身,
-        `--task` 是它的子命令,直接走 [exe, --task, ...] 即可。
-        开发模式 (python app_gui.py) 时 sys.executable 是 python 解释器,
-        需要把当前脚本路径 __file__ 加上,否则 `python --task` 会被解释器
-        误判为 `python --task` (报 unknown option)。
-        """
-        if getattr(sys, "frozen", False):
-            cmd = [sys.executable, "--task", task]
-        else:
-            cmd = [sys.executable, os.path.abspath(__file__), "--task", task]
-        self.after(0, self._log, f">>> {' '.join(cmd)}\n\n")
-
-        env = os.environ.copy()
-        env["PYTHONIOENCODING"] = "utf-8"
-        env["WECHAT_DECRYPT_APP_DIR"] = BASE_DIR
-        env["WECHAT_DECRYPT_GUI"] = "1"
-        env["WECHAT_DECRYPT_NONINTERACTIVE"] = "1"
-
-        if self._selected_contacts:
-            env["WECHAT_EXPORT_CONTACTS"] = ",".join(self._selected_contacts)
-        if self._export_formats:
-            env["WECHAT_EXPORT_FORMATS"] = ",".join(self._export_formats)
-        env["WECHAT_EXPORT_IMAGES"] = "1" if getattr(self, '_include_images', True) else "0"
-        if getattr(self, '_include_sns_media', False):
-            env["WECHAT_SNS_DOWNLOAD_MEDIA"] = "1"
-        if self._selected_wxwork_conversations:
-            env["WXWORK_EXPORT_CONVERSATIONS"] = ",".join(self._selected_wxwork_conversations)
-        if self._wxwork_export_formats:
-            env["WXWORK_EXPORT_FORMATS"] = ",".join(self._wxwork_export_formats)
-
-        proc = subprocess.Popen(
-            cmd,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.STDOUT,
-            cwd=BASE_DIR,
-            env=env,
-            creationflags=subprocess.CREATE_NO_WINDOW if sys.platform == "win32" else 0,
-        )
-
-        for raw in proc.stdout:
-            line = raw.decode("utf-8", errors="replace")
-            self.after(0, self._log, line)
-
-        proc.wait()
-        return proc.returncode
-
-    def _exec_combined(self):
-        """执行导出（消息 + 可选语音）"""
-        try:
-            if self._export_formats:
-                rc = self._run_subprocess("export")
-                if rc != 0:
-                    self.after(0, self._log, f"\n❌ 导出失败 (返回码 {rc})\n")
-                    self.after(0, self.status_var.set, f"失败 (返回码 {rc})")
-                    return
-
-            if getattr(self, '_include_sns', False):
-                if self._export_formats:
-                    self.after(0, self._log, "\n\n━━━ 开始导出朋友圈 ━━━\n\n")
-                rc = self._run_subprocess("export_sns")
-                if rc != 0:
-                    self.after(0, self._log, f"\n❌ 朋友圈导出失败 (返回码 {rc})\n")
-                    self.after(0, self.status_var.set, f"朋友圈导出失败 (返回码 {rc})")
-                    return
-
-            if self._include_voice:
-                if self._export_formats or getattr(self, '_include_sns', False):
-                    self.after(0, self._log, "\n\n━━━ 开始转换语音 ━━━\n\n")
-                rc = self._run_subprocess("voice")
-                if rc != 0:
-                    self.after(0, self._log, f"\n❌ 语音转换失败 (返回码 {rc})\n")
-                    self.after(0, self.status_var.set, f"语音转换失败 (返回码 {rc})")
-                    return
-
-            self.after(0, self._log, "\n✅ 全部完成！\n")
-            self.after(0, self.status_var.set, "完成")
-        except Exception as e:
-            self.after(0, self._log, f"\n❌ 异常: {e}\n")
-            self.after(0, self.status_var.set, "异常")
-        finally:
-            self._selected_contacts = None
-            self._export_formats = None
-            self._include_voice = False
-            self._include_images = True
-            self._include_sns = False
-            self._include_sns_media = False
-            self.after(0, self._on_task_done)
-
-    def _exec_wxwork_decrypt(self):
-        """执行企业微信 key 提取 + 数据库解密。"""
-        try:
-            self.after(0, self._log, "━━━ 开始提取企业微信密钥 ━━━\n\n")
-            rc = self._run_subprocess("find_wxwork_keys")
-            if rc != 0:
-                self.after(0, self._log, f"\n❌ 企业微信密钥提取失败 (返回码 {rc})\n")
-                self.after(0, self.status_var.set, f"企业微信密钥提取失败 (返回码 {rc})")
-                return
-
-            self.after(0, self._log, "\n\n━━━ 开始解密企业微信数据库 ━━━\n\n")
-            rc = self._run_subprocess("decrypt_wxwork")
-            if rc != 0:
-                self.after(0, self._log, f"\n❌ 企业微信数据库解密失败 (返回码 {rc})\n")
-                self.after(0, self.status_var.set, f"企业微信解密失败 (返回码 {rc})")
-                return
-
-            self.after(0, self._log, "\n✅ 企业微信解密完成！输出目录: wxwork_decrypted\n")
-            self.after(0, self.status_var.set, "企业微信解密完成")
-        except Exception as e:
-            self.after(0, self._log, f"\n❌ 异常: {e}\n")
-            self.after(0, self.status_var.set, "异常")
-        finally:
-            self.after(0, self._on_task_done)
-
-    def _exec_wxwork_export(self):
-        """执行企业微信消息导出。"""
-        try:
-            rc = self._run_subprocess("export_wxwork")
-            if rc != 0:
-                self.after(0, self._log, f"\n❌ 企业微信导出失败 (返回码 {rc})\n")
-                self.after(0, self.status_var.set, f"企业微信导出失败 (返回码 {rc})")
-                return
-            self.after(0, self._log, "\n✅ 企业微信导出完成！输出目录: wxwork_export\n")
-            self.after(0, self.status_var.set, "企业微信导出完成")
-        except Exception as e:
-            self.after(0, self._log, f"\n❌ 异常: {e}\n")
-            self.after(0, self.status_var.set, "异常")
-        finally:
-            self._selected_wxwork_conversations = None
-            self._wxwork_export_formats = None
-            self.after(0, self._on_task_done)
-
-    def _exec_task(self, task: str):
-        """执行单一任务（解密）"""
-        try:
-            rc = self._run_subprocess(task)
-            if rc == 0:
-                self.after(0, self._log, "\n✅ 完成！\n")
-                self.after(0, self.status_var.set, "完成")
-                if task == "decrypt":
-                    self._auto_export = True
-            else:
-                self.after(0, self._log, f"\n❌ 进程退出，返回码: {rc}\n")
-                self.after(0, self.status_var.set, f"失败 (返回码 {rc})")
-        except Exception as e:
-            self.after(0, self._log, f"\n❌ 异常: {e}\n")
-            self.after(0, self.status_var.set, "异常")
-        finally:
-            self.after(0, self._on_task_done)
-
-    def _on_task_done(self):
-        self._running = False
-        self.progress.stop()
-        self._set_buttons(True)
-        if self._auto_export:
-            self._auto_export = False
-            self._log("\n解密完成，自动进入导出流程...\n\n")
-            self.after(500, lambda: self._run_task("export"))
-
-
-if __name__ == "__main__":
-    app = App()
-    app.mainloop()