fix: EXE版禁用一键安装拖拽，打包时集成tkinterdnd2

- EXE版(sys.frozen)不显示安装按钮，提示用源码版安装后重新打包
- tkinterdnd2 加入 hidden_imports，打包时自动带上

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/ui/main_window.py

@@ -304,6 +304,8 @@ def _setup_drag_area(mid_container, theme, dnd_supported, log_text, status_bar):
         btn_row = tk.Frame(dnd_frame, bg=theme["card_bg"])
         btn_row.pack(fill=tk.X)
 
+        is_frozen = getattr(sys, 'frozen', False)
+
         def copy_install():
             try:
                 mid_container.winfo_toplevel().clipboard_clear()
@@ -312,8 +314,12 @@ def _setup_drag_area(mid_container, theme, dnd_supported, log_text, status_bar):
             except Exception as e:
                 messagebox.showwarning("复制失败", str(e))
 
-        create_modern_button(btn_row, "复制安装命令", copy_install, "primary", px_width=132, px_height=28).pack(side=tk.RIGHT)
-
+        if is_frozen:
+            tk.Label(
+                btn_row, text="EXE版不支持运行时安装，请用源码版安装后重新打包",
+                bg=theme["card_bg"], fg="#999999", font=("Microsoft YaHei UI", 8)
+            ).pack(side=tk.RIGHT, padx=4)
+        else:
             def install_and_restart():
                 try:
                     add_to_log(log_text, "开始安装拖拽支持库 tkinterdnd2...\n", "info")
@@ -332,6 +338,8 @@ def _setup_drag_area(mid_container, theme, dnd_supported, log_text, status_bar):
 
             create_modern_button(btn_row, "一键安装拖拽", install_and_restart, "primary", px_width=132, px_height=28).pack(side=tk.RIGHT, padx=(3, 0))
 
+        create_modern_button(btn_row, "复制安装命令", copy_install, "primary", px_width=132, px_height=28).pack(side=tk.RIGHT)
+
     # 点击拖拽框选择文件
     def _click_select(evt=None):
         try:

build_exe.py

@@ -58,6 +58,7 @@ hidden_imports = [
     'xlutils',
     'requests',
     'dotenv',
+    'tkinterdnd2',
     'configparser',
     'threading',
     'datetime',