feat: 改进文件保存对话框，支持跨平台系统原生保存

主要改进：
1. 新增 save_file_with_dialog 函数
   - 优先使用 PyWebview 原生模式保存对话框
   - 回退到 Tkinter 对话框（本地环境）
   - 最终回退到浏览器下载方式

2. 优化所有导出功能
   - Excel 对比表导出支持系统保存对话框
   - DXF 文件导出支持系统保存对话框
   - ZIP 批量导出支持系统保存对话框
   - 模板导出支持系统保存对话框

3. 代码质量改进
   - 统一异步函数命名规范（on_click_*）
   - 改进代码格式化和缩进
   - 添加详细的调试日志

4. 用户体验提升
   - 用户可以自由选择保存位置
   - 支持文件类型过滤
   - 自动处理文件名后缀

gui.py

@@ -5,7 +5,7 @@ import contextlib
 import tempfile
 import matplotlib.pyplot as plt
 import matplotlib.backends.backend_svg
-from nicegui import ui, events
+from nicegui import ui, events, app
 from main import (
     compare_design_methods,
     export_to_dxf,
@@ -54,13 +54,15 @@ if not os.path.exists(state["temp_dir"]):
 @ui.page("/")
 def index():
     # 注入 CSS 隐藏表格自带的复选框列，并定义选中行的高亮背景色
-    ui.add_head_html("""
+    ui.add_head_html(
+        """
         <style>
             .hide-selection-column .q-table__selection { display: none; }
             .hide-selection-column .q-table tr.selected { background-color: #e3f2fd !important; }
             .no-list .q-uploader__list { display: none !important; }
         </style>
-    """)
+    """
+    )
     ui.query("body").style(
         'background-color: #f0f2f5; font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;'
     )
@@ -71,12 +73,12 @@ def index():
         "results_table": None,
         "plot_container": None,
         "export_row": None,
-        "export_selected_btn": None, # 新增按钮引用
+        "export_selected_btn": None,  # 新增按钮引用
         "status_label": None,
         "upload_widget": None,
         "run_btn": None,
-        "current_file_container": None, # 替换 label 为 container
+        "current_file_container": None,  # 替换 label 为 container
-        "info_container": None, # 新增信息展示容器
+        "info_container": None,  # 新增信息展示容器
     }
 
     def update_info_panel():
@@ -85,64 +87,96 @@ def index():
             with refs["info_container"]:
                 # System Params - Always show
                 with ui.row().classes("w-full items-center gap-4 mb-2"):
-                    ui.icon('settings', color='primary').classes('text-2xl')
+                    ui.icon("settings", color="primary").classes("text-2xl")
                     ui.label("系统参数").classes("text-lg font-bold")
-                    
+
                     params_text = []
-                    
+
                     # 获取电压
-                    v = 66000 # Default
+                    v = 66000  # Default
                     is_default_v = True
-                    if state.get("system_params") and 'voltage' in state['system_params']:
+                    if (
-                        v = state['system_params']['voltage']
+                        state.get("system_params")
+                        and "voltage" in state["system_params"]
+                    ):
+                        v = state["system_params"]["voltage"]
                         is_default_v = False
-                    
+
                     v_str = f"电压: {v/1000:.1f} kV" if v >= 1000 else f"电压: {v} V"
                     if is_default_v:
                         v_str += " (默认)"
                     params_text.append(v_str)
 
                     # 获取功率因数
-                    pf = 0.95 # Default
+                    pf = 0.95  # Default
                     is_default_pf = True
-                    if state.get("system_params") and 'power_factor' in state['system_params']:
+                    if (
-                        pf = state['system_params']['power_factor']
+                        state.get("system_params")
+                        and "power_factor" in state["system_params"]
+                    ):
+                        pf = state["system_params"]["power_factor"]
                         is_default_pf = False
-                        
+
                     pf_str = f"功率因数: {pf}"
                     if is_default_pf:
                         pf_str += " (默认)"
                     params_text.append(pf_str)
-                        
-                    for p in params_text:
-                        ui.chip(p, icon='bolt').props('outline color=primary')
 
-                ui.separator().classes('my-2')
+                    for p in params_text:
+                        ui.chip(p, icon="bolt").props("outline color=primary")
+
+                ui.separator().classes("my-2")
 
                 # Cables
                 if state.get("cable_specs"):
                     with ui.row().classes("w-full items-center gap-2 mb-2"):
-                        ui.icon('cable', color='secondary').classes('text-2xl')
+                        ui.icon("cable", color="secondary").classes("text-2xl")
                         ui.label("电缆规格参数").classes("text-lg font-bold")
 
                     columns = [
-                        {'name': 'section', 'label': '截面 (mm²)', 'field': 'section', 'align': 'center'},
+                        {
-                        {'name': 'capacity', 'label': '载流量 (A)', 'field': 'capacity', 'align': 'center'},
+                            "name": "section",
-                        {'name': 'resistance', 'label': '电阻 (Ω/km)', 'field': 'resistance', 'align': 'center'},
+                            "label": "截面 (mm²)",
-                        {'name': 'cost', 'label': '参考单价 (元/m)', 'field': 'cost', 'align': 'center'},
+                            "field": "section",
+                            "align": "center",
+                        },
+                        {
+                            "name": "capacity",
+                            "label": "载流量 (A)",
+                            "field": "capacity",
+                            "align": "center",
+                        },
+                        {
+                            "name": "resistance",
+                            "label": "电阻 (Ω/km)",
+                            "field": "resistance",
+                            "align": "center",
+                        },
+                        {
+                            "name": "cost",
+                            "label": "参考单价 (元/m)",
+                            "field": "cost",
+                            "align": "center",
+                        },
                     ]
                     rows = []
                     for spec in state["cable_specs"]:
                         # spec is (section, capacity, resistance, cost, is_optional)
-                        rows.append({
+                        rows.append(
-                            'section': spec[0],
+                            {
-                            'capacity': spec[1],
+                                "section": spec[0],
-                            'resistance': spec[2],
+                                "capacity": spec[1],
-                            'cost': spec[3]
+                                "resistance": spec[2],
-                        })
+                                "cost": spec[3],
-                    ui.table(columns=columns, rows=rows).classes('w-full').props('dense flat bordered')
+                            }
+                        )
+                    ui.table(columns=columns, rows=rows).classes("w-full").props(
+                        "dense flat bordered"
+                    )
                 else:
-                    ui.label("未检测到电缆数据，将使用默认参数。").classes("text-gray-500 italic")
+                    ui.label("未检测到电缆数据，将使用默认参数。").classes(
+                        "text-gray-500 italic"
+                    )
 
     async def handle_upload(e: events.UploadEventArguments):
         try:
@@ -193,27 +227,38 @@ def index():
             state["excel_path"] = path
             state["original_filename"] = filename
             ui.notify(f"文件已上传: {filename}", type="positive")
-            
+
             # 更新文件显示区域
             if refs["current_file_container"]:
                 refs["current_file_container"].clear()
                 with refs["current_file_container"]:
-                    with ui.row().classes('items-center w-full bg-blue-50 p-2 rounded border border-blue-200'):
+                    with ui.row().classes(
-                        ui.icon('description', color='primary').classes('text-xl mr-2')
+                        "items-center w-full bg-blue-50 p-2 rounded border border-blue-200"
-                        ui.label(filename).classes('font-medium text-gray-700 flex-grow')
+                    ):
-                        ui.icon('check_circle', color='positive')
+                        ui.icon("description", color="primary").classes("text-xl mr-2")
+                        ui.label(filename).classes(
+                            "font-medium text-gray-700 flex-grow"
+                        )
+                        ui.icon("check_circle", color="positive")
 
             # 加载数据
             try:
                 # 尝试解包 4 个返回值 (新版 main.py)
-                state["turbines"], state["substation"], state["cable_specs"], state["system_params"] = load_data_from_excel(path)
+                (
+                    state["turbines"],
+                    state["substation"],
+                    state["cable_specs"],
+                    state["system_params"],
+                ) = load_data_from_excel(path)
             except ValueError:
                 # 兼容旧版 (如果是 3 个返回值)
-                state["turbines"], state["substation"], state["cable_specs"] = load_data_from_excel(path)
+                state["turbines"], state["substation"], state["cable_specs"] = (
+                    load_data_from_excel(path)
+                )
                 state["system_params"] = {}
-            
+
             update_info_panel()
-            
+
             # 清空上传组件列表，以便下次选择（配合 .no-list CSS 使用）
             if refs["upload_widget"]:
                 refs["upload_widget"].reset()
@@ -221,6 +266,146 @@ def index():
         except Exception as ex:
             ui.notify(f"上传处理失败: {ex}", type="negative")
 
+    async def save_file_with_dialog(filename, callback, file_filter="All files (*.*)"):
+        """
+        跨平台文件保存助手。
+        如果是原生模式，弹出系统保存对话框。
+        如果是浏览器模式(但在本地运行)，尝试使用 tkinter 弹出对话框。
+        最后回退到使用 nicegui ui.download。
+        :param filename: 默认文件名
+        :param callback: 接收文件路径并执行保存操作的函数 (filepath) -> None
+        :param file_filter: 格式如 "Excel Files (*.xlsx)"
+        """
+        # 检测是否为原生模式 (PyWebview)
+        is_native = False
+        native_window = None
+        try:
+            # 使用 getattr 安全获取 app.native，避免属性不存在错误
+            # 并在 reload=True 时 native 可能未能正确初始化
+            n_obj = getattr(app, "native", None)
+            if n_obj and getattr(n_obj, "main_window", None):
+                is_native = True
+                native_window = n_obj.main_window
+        except Exception as e:
+            print(f"DEBUG: Native check error: {e}")
+
+        print(
+            f"DEBUG: save_file_with_dialog called. is_native={is_native}, filename={filename}"
+        )
+
+        if is_native and native_window:
+            try:
+                # PyWebview 的 create_file_dialog 的 file_types 参数期望一个字符串元组
+                # 格式如: ('Description (*.ext)', 'All files (*.*)')
+                file_types = (file_filter,)
+
+                print(f"DEBUG: calling create_file_dialog with types={file_types}")
+
+                # 在 Native 模式下，create_file_dialog 是同步阻塞的
+                # 注意：必须使用 app.native.SAVE_DIALOG
+                save_path = native_window.create_file_dialog(
+                    app.native.SAVE_DIALOG,
+                    directory="",
+                    save_filename=filename,
+                    file_types=file_types,
+                )
+
+                print(f"DEBUG: save_path result: {save_path}")
+
+                # 用户取消
+                if not save_path:
+                    return
+
+                # 处理返回类型 (PyWebview 可能返回字符串或列表)
+                if isinstance(save_path, (list, tuple)):
+                    if not save_path:
+                        return
+                    save_path = save_path[0]
+
+                # 确保文件名后缀正确
+                if not save_path.lower().endswith(
+                    os.path.splitext(filename)[1].lower()
+                ):
+                    save_path += os.path.splitext(filename)[1]
+
+                await callback(save_path)
+                ui.notify(f"文件已保存至: {save_path}", type="positive")
+                return  # 成功处理，退出
+
+            except Exception as e:
+                import traceback
+
+                traceback.print_exc()
+                print(f"ERROR in save_file_with_dialog (native): {e}")
+                # ui.notify(f"原生保存失败，尝试其他方式: {e}", type="warning")
+                print(f"原生保存失败，尝试其他方式: {e}")
+                # 继续向下执行，尝试 fallback
+
+        # 非 Native 模式 (或 Native 失败)，尝试使用 Tkinter (仅限本地环境)
+        try:
+            import tkinter as tk
+            from tkinter import filedialog
+            from nicegui import run
+
+            print("DEBUG: Attempting Tkinter dialog...")
+
+            def get_save_path_tk(default_name, f_filter):
+                try:
+                    # 创建隐藏的根窗口
+                    root = tk.Tk()
+                    root.withdraw()
+                    root.attributes("-topmost", True)  # 尝试置顶
+
+                    # 转换 filter 格式: "Excel Files (*.xlsx)" -> [("Excel Files", "*.xlsx")]
+                    filetypes = []
+                    if "(" in f_filter and ")" in f_filter:
+                        desc = f_filter.split("(")[0].strip()
+                        ext = f_filter.split("(")[1].split(")")[0]
+                        filetypes.append((desc, ext))
+                    filetypes.append(("All files", "*.*"))
+
+                    path = filedialog.asksaveasfilename(
+                        initialfile=default_name, filetypes=filetypes, title="保存文件"
+                    )
+                    root.destroy()
+                    return path
+                except Exception as ex:
+                    print(f"Tkinter inner error: {ex}")
+                    return None
+
+            # 在线程中运行 tkinter，避免阻塞 asyncio 事件循环
+            save_path = await run.io_bound(get_save_path_tk, filename, file_filter)
+
+            if save_path:
+                print(f"DEBUG: Tkinter save_path: {save_path}")
+                # 确保文件名后缀正确
+                if not save_path.lower().endswith(
+                    os.path.splitext(filename)[1].lower()
+                ):
+                    save_path += os.path.splitext(filename)[1]
+
+                await callback(save_path)
+                ui.notify(f"文件已保存至: {save_path}", type="positive")
+                return  # 成功处理
+            elif save_path is None:
+                print("DEBUG: Tkinter dialog cancelled or failed silently.")
+                # 如果是用户取消（返回空字符串），通常不需要回退到下载。
+                # 但这里如果 Tkinter 彻底失败返回 None，可能需要回退。
+                # askopenfilename 返回空字符串表示取消。我们假设 None 是异常。
+                # 这里简化处理：只要没拿到路径且没报错，就认为是取消。
+                if save_path == "":
+                    return
+
+        except Exception as e:
+            print(f"Tkinter dialog failed: {e}")
+            # Fallback to ui.download if tkinter fails
+
+        # 最后的回退方案：浏览器下载
+        print("DEBUG: Falling back to ui.download")
+        temp_path = os.path.join(state["temp_dir"], filename)
+        await callback(temp_path)
+        ui.download(temp_path)
+
     def update_export_buttons():
         if refs["export_row"]:
             refs["export_row"].clear()
@@ -229,17 +414,20 @@ def index():
 
         # 获取文件名基础前缀
         file_prefix = "wind_farm"
-        download_name = "wind_farm_design_result.xlsx"
+        default_excel_name = "wind_farm_design_result.xlsx"
-        
+
         # 确定主对比 Excel 的生成路径 (对应 main.py 中的生成逻辑)
         if state.get("excel_path"):
             file_prefix = os.path.splitext(state["original_filename"])[0]
-            download_name = f"{file_prefix}_result.xlsx"
+            default_excel_name = f"{file_prefix}_result.xlsx"
-            main_excel_path = os.path.join(state["temp_dir"], f"{file_prefix}_design.xlsx")
+            # 这里的路径是 main.py 中生成的源文件路径，用于复制
+            source_excel_path = os.path.join(
+                state["temp_dir"], f"{file_prefix}_design.xlsx"
+            )
         else:
-            main_excel_path = "wind_farm_design.xlsx"
+            source_excel_path = "wind_farm_design.xlsx"
 
-        # 寻找推荐方案：优先 Scenario 1 的最低成本，否则取全局最低成本
+        # 寻找推荐方案
         scenario1_results = [r for r in state["results"] if "Scenario 1" in r["name"]]
         if scenario1_results:
             best_res = min(scenario1_results, key=lambda x: x["cost"])
@@ -247,14 +435,31 @@ def index():
             best_res = min(state["results"], key=lambda x: x["cost"])
 
         with refs["export_row"]:
+
+            # --- 下载 Excel ---
+            async def save_excel(path):
+                import shutil
+
+                # 如果源文件存在，则复制到目标路径
+                if os.path.exists(source_excel_path):
+                    shutil.copy2(source_excel_path, path)
+                else:
+                    # 如果不存在，重新生成
+                    export_all_scenarios_to_excel(state["results"], path)
+
+            async def on_click_excel():
+                await save_file_with_dialog(
+                    default_excel_name, save_excel, "Excel Files (*.xlsx)"
+                )
+
             ui.button(
                 "下载 Excel 对比表",
-                on_click=lambda: ui.download(main_excel_path, download_name),
+                on_click=on_click_excel,
             ).props("icon=download")
 
+            # --- 导出推荐方案 DXF ---
             def export_best_dxf():
                 if state["substation"] is not None:
-                    # 生成安全的文件名
                     safe_name = "".join(
                         [
                             c
@@ -262,31 +467,68 @@ def index():
                             if c.isalnum() or c in (" ", "-", "_")
                         ]
                     ).strip()
-                    dxf_name = os.path.join(state["temp_dir"], f"{file_prefix}_best_{safe_name}.dxf")
+                    default_name = f"{file_prefix}_best_{safe_name}.dxf"
 
-                    export_to_dxf(
+                    async def save_dxf(path):
-                        best_res["turbines"],
+                        export_to_dxf(
-                        state["substation"],
+                            best_res["turbines"],
-                        best_res["eval"]["details"],
+                            state["substation"],
-                        dxf_name,
+                            best_res["eval"]["details"],
+                            path,
+                        )
+
+                    # 包装为 async 任务，并在 NiceGUI 事件循环中执行
+                    async def run_save():
+                        await save_file_with_dialog(
+                            default_name, save_dxf, "DXF Files (*.dxf)"
+                        )
+
+                    # 这里的 export_best_dxf 本身是普通函数，绑定到 on_click
+                    # 但我们需要它执行异步操作。最简单的是让 export_best_dxf 变为 async
+                    # 或者在这里直接调用 run_save (但这在普通函数里不行)
+                    # 更好的方法是将 export_best_dxf 定义为 async，如下所示
+                    return run_save()
+                else:
+                    ui.notify("缺少升压站数据，无法导出 DXF", type="negative")
+
+            # 将 export_best_dxf 改为 async 并重命名，以便直接用作回调
+            async def on_click_best_dxf():
+                if state["substation"] is not None:
+                    safe_name = "".join(
+                        [
+                            c
+                            for c in best_res["name"]
+                            if c.isalnum() or c in (" ", "-", "_")
+                        ]
+                    ).strip()
+                    default_name = f"{file_prefix}_best_{safe_name}.dxf"
+
+                    async def save_dxf(path):
+                        export_to_dxf(
+                            best_res["turbines"],
+                            state["substation"],
+                            best_res["eval"]["details"],
+                            path,
+                        )
+
+                    await save_file_with_dialog(
+                        default_name, save_dxf, "DXF Files (*.dxf)"
                     )
-                    ui.download(dxf_name)
-                    ui.notify(f'已导出推荐方案: {best_res["name"]}', type="positive")
                 else:
                     ui.notify("缺少升压站数据，无法导出 DXF", type="negative")
 
             ui.button(
-                f'导出推荐方案 DXF ({best_res["name"]})', on_click=export_best_dxf
+                f'导出推荐方案 DXF ({best_res["name"]})', on_click=on_click_best_dxf
             ).props("icon=architecture color=accent")
 
-            def export_selected_dxf():
+            # --- 导出选中方案 DXF ---
+            async def on_click_selected_dxf():
                 if not refs["results_table"] or not refs["results_table"].selected:
                     ui.notify("请先在上方表格中选择一个方案", type="warning")
                     return
 
                 selected_row = refs["results_table"].selected[0]
                 row_name = selected_row.get("original_name", selected_row.get("name"))
-
                 selected_res = next(
                     (r for r in state["results"] if r["name"] == row_name), None
                 )
@@ -299,62 +541,55 @@ def index():
                             if c.isalnum() or c in (" ", "-", "_")
                         ]
                     ).strip()
-                    dxf_name = os.path.join(state["temp_dir"], f"{file_prefix}_{safe_name}.dxf")
+                    default_name = f"{file_prefix}_{safe_name}.dxf"
 
-                    export_to_dxf(
+                    async def save_dxf(path):
-                        selected_res["turbines"],
+                        export_to_dxf(
-                        state["substation"],
+                            selected_res["turbines"],
-                        selected_res["eval"]["details"],
+                            state["substation"],
-                        dxf_name,
+                            selected_res["eval"]["details"],
+                            path,
+                        )
+
+                    await save_file_with_dialog(
+                        default_name, save_dxf, "DXF Files (*.dxf)"
                     )
-                    ui.download(dxf_name)
-                    ui.notify(f'已导出选中方案: {selected_res["name"]}', type="positive")
                 else:
-                    ui.notify("无法导出：未找到方案数据或缺少升压站信息", type="negative")
+                    ui.notify(
+                        "无法导出：未找到方案数据或缺少升压站信息", type="negative"
+                    )
 
-            # 记录此按钮引用，以便 handle_row_click 更新文字
             refs["export_selected_btn"] = ui.button(
-                "导出选中方案 DXF", on_click=export_selected_dxf
+                "导出选中方案 DXF", on_click=on_click_selected_dxf
             ).props("icon=architecture color=primary")
 
-            # 初始化按钮文字
             clean_name = best_res["name"].replace("(推荐) ", "")
             refs["export_selected_btn"].set_text(f"导出选中方案 ({clean_name})")
 
-            def export_all_dxf():
+            # --- 导出全部 ZIP ---
+            async def on_click_all_dxf():
                 if not state["results"] or state["substation"] is None:
                     ui.notify("无方案数据可导出", type="warning")
                     return
 
-                import zipfile
+                default_name = f"{file_prefix}_all_results.zip"
 
-                # 1. 确定文件名
+                async def save_zip(path):
-                zip_filename = os.path.join(state["temp_dir"], f"{file_prefix}_all_results.zip")
+                    import zipfile
-                excel_result_name = f"{file_prefix}_summary.xlsx"
 
-                # 推断 main.py 生成的原始 Excel 路径
+                    excel_result_name = f"{file_prefix}_summary.xlsx"
-                generated_excel_path = main_excel_path
 
-                try:
+                    with zipfile.ZipFile(path, "w", zipfile.ZIP_DEFLATED) as zipf:
-                    with zipfile.ZipFile(
+                        # 1. Excel
-                        zip_filename, "w", zipfile.ZIP_DEFLATED
+                        temp_excel = os.path.join(state["temp_dir"], "temp_export.xlsx")
-                    ) as zipf:
+                        export_all_scenarios_to_excel(state["results"], temp_excel)
-                        # 2. 添加 Excel 结果表
+                        zipf.write(temp_excel, arcname=excel_result_name)
-                        if os.path.exists(generated_excel_path):
+                        try:
-                            zipf.write(generated_excel_path, arcname=excel_result_name)
+                            os.remove(temp_excel)
-                        else:
+                        except:
-                            # 尝试重新生成
+                            pass
-                            try:
-                                temp_excel = os.path.join(state["temp_dir"], "temp_export.xlsx")
-                                export_all_scenarios_to_excel(
-                                    state["results"], temp_excel
-                                )
-                                zipf.write(temp_excel, arcname=excel_result_name)
-                                os.remove(temp_excel)
-                            except Exception as e:
-                                print(f"生成Excel失败: {e}")
 
-                        # 3. 添加所有 DXF
+                        # 2. DXFs
                         for res in state["results"]:
                             safe_name = "".join(
                                 [
@@ -363,25 +598,24 @@ def index():
                                     if c.isalnum() or c in (" ", "-", "_")
                                 ]
                             ).strip()
-                            dxf_name = os.path.join(state["temp_dir"], f"{file_prefix}_{safe_name}.dxf")
+                            dxf_name = os.path.join(
+                                state["temp_dir"], f"{file_prefix}_{safe_name}.dxf"
+                            )
                             export_to_dxf(
                                 res["turbines"],
                                 state["substation"],
                                 res["eval"]["details"],
                                 dxf_name,
                             )
-                            zipf.write(dxf_name)
+                            zipf.write(dxf_name, arcname=os.path.basename(dxf_name))
                             try:
                                 os.remove(dxf_name)
                             except:
                                 pass
-                    ui.download(zip_filename)
-                    ui.notify("已导出所有方案 (含Excel)", type="positive")
-                except Exception as ex:
-                    ui.notify(f"导出失败: {ex}", type="negative")
 
+                await save_file_with_dialog(default_name, save_zip, "ZIP Files (*.zip)")
 
-            ui.button("导出全部方案 DXF (ZIP)", on_click=export_all_dxf).props(
+            ui.button("导出全部方案 DXF (ZIP)", on_click=on_click_all_dxf).props(
                 "icon=folder_zip color=secondary"
             )
 
@@ -507,11 +741,11 @@ def index():
                 # 默认推荐 Scenario 1 中成本最低的方案
                 scenario1_results = [r for r in results if "Scenario 1" in r["name"]]
                 if scenario1_results:
-                     best_res = min(scenario1_results, key=lambda x: x["cost"])
+                    best_res = min(scenario1_results, key=lambda x: x["cost"])
                 else:
-                     # 如果没有 Scenario 1，则回退到全局最优
+                    # 如果没有 Scenario 1，则回退到全局最优
-                     best_res = min(results, key=lambda x: x["cost"])
+                    best_res = min(results, key=lambda x: x["cost"])
-                
+
                 update_plot(best_res)
                 ui.notify(
                     f'计算完成！已自动加载推荐方案: {best_res["name"]}', type="positive"
@@ -595,48 +829,71 @@ def index():
                 )
     processing_dialog.props("persistent")
 
-    with ui.header().classes("bg-primary text-white p-4 shadow-lg items-center no-wrap"):
+    with ui.header().classes(
+        "bg-primary text-white p-4 shadow-lg items-center no-wrap"
+    ):
         with ui.column().classes("gap-0"):
-            ui.label("海上风电场集电线路设计优化系统 v1.0").classes("text-2xl font-bold")
+            ui.label("海上风电场集电线路设计优化系统 v1.0").classes(
+                "text-2xl font-bold"
+            )
         with ui.column().classes("gap-0"):
             ui.label("Wind Farm Collector System Design Optimizer").classes(
                 "text-sm opacity-80"
             )
         ui.space()
-        ui.label("中能建西北院海上能源业务开发部").classes(
+        ui.label("中能建西北院海上能源业务开发部").classes("text-xl font-bold")
-            "text-xl font-bold"
-        )
 
     with ui.row().classes("w-full p-4 gap-4"):
         with ui.card().classes("w-1/4 p-4 shadow-md"):
             ui.label("配置面板").classes("text-xl font-semibold mb-4 border-b pb-2")
 
-            def export_template():
+            async def export_template():
                 from generate_template import create_template
-                try:
+                import shutil
+
+                async def save_template(path):
+                    # 生成模板到当前目录
                     create_template()
-                    ui.download("coordinates.xlsx")
+                    source = "coordinates.xlsx"
-                    ui.notify("Excel 模板导出成功", type="positive")
+                    if os.path.exists(source):
-                except Exception as ex:
+                        shutil.copy2(source, path)
-                    ui.notify(f"模板导出失败: {ex}", type="negative")
+                    else:
+                        raise FileNotFoundError("无法生成模板文件")
+
+                await save_file_with_dialog(
+                    "coordinates.xlsx", 
+                    save_template, 
+                    "Excel Files (*.xlsx)"
+                )
 
             ui.button("导出 Excel 模板", on_click=export_template).classes(
                 "w-full mb-4"
             ).props("icon=file_download outline color=primary")
 
+            async def test_save_dialog():
+                async def dummy_callback(path):
+                    # 仅作为测试，实际不写入文件，只弹出通知
+                    ui.notify(f"测试成功！选定路径: {path}", type="info")
+
+                await save_file_with_dialog(
+                    "test_save_dialog.txt", dummy_callback, "Text Files (*.txt)"
+                )
+
+            ui.button("测试对话框", on_click=test_save_dialog).classes(
+                "w-full mb-4"
+            ).props("icon=bug_report outline color=orange")
+
             ui.label("1. 上传坐标文件 (.xlsx)").classes("font-medium")
-            
+
             # 使用 .no-list CSS 隐藏 Quasar 默认列表，完全自定义文件显示
             refs["upload_widget"] = ui.upload(
-                label="选择Excel文件", 
+                label="选择Excel文件", on_upload=handle_upload, auto_upload=True
-                on_upload=handle_upload, 
-                auto_upload=True
             ).classes("w-full mb-2 no-list")
-            
+
             # 自定义文件显示容器
-            refs['current_file_container'] = ui.column().classes('w-full mb-4')
+            refs["current_file_container"] = ui.column().classes("w-full mb-4")
-            with refs['current_file_container']:
+            with refs["current_file_container"]:
-                ui.label('未选择文件').classes('text-xs text-gray-500 italic ml-1')
+                ui.label("未选择文件").classes("text-xs text-gray-500 italic ml-1")
 
             refs["run_btn"] = (
                 ui.button(
@@ -649,9 +906,15 @@ def index():
 
         with ui.column().classes("w-3/4 gap-4"):
             # 新增：信息展示卡片
-            with ui.card().classes("w-full p-4 shadow-md").style("max-height: 400px; overflow-y: auto;"):
+            with (
-                 refs["info_container"] = ui.column().classes("w-full")
+                ui.card()
-                 ui.label("请上传 Excel 文件以查看系统参数和电缆规格...").classes("text-gray-500 italic")
+                .classes("w-full p-4 shadow-md")
+                .style("max-height: 400px; overflow-y: auto;")
+            ):
+                refs["info_container"] = ui.column().classes("w-full")
+                ui.label("请上传 Excel 文件以查看系统参数和电缆规格...").classes(
+                    "text-gray-500 italic"
+                )
 
             with ui.card().classes("w-full p-4 shadow-md"):
                 ui.label("方案对比结果 (点击行查看拓扑详情)").classes(
@@ -721,13 +984,16 @@ target_port = find_available_port(8082)  # 从 8082 开始，避开常用的 808
 
 # 检测是否为打包后的exe程序
 import sys
-if getattr(sys, 'frozen', False):
+
+if getattr(sys, "frozen", False):
     # 修复无控制台模式下 stdout/stderr 为 None 导致的 logging 错误
     class NullWriter:
         def write(self, text):
             pass
+
         def flush(self):
             pass
+
         def isatty(self):
             return False
 
@@ -738,12 +1004,29 @@ if getattr(sys, 'frozen', False):
 
     # 打包环境下禁用日志配置，避免在无控制台模式下出现错误
     import logging.config
-    logging.config.dictConfig({
+
-        'version': 1,
+    logging.config.dictConfig(
-        'disable_existing_loggers': True,
+        {
-    })
+            "version": 1,
-    ui.run(title="海上风电场集电线路优化", host='127.0.0.1', port=target_port, reload=False, window_size=(1280, 800),native=True)
+            "disable_existing_loggers": True,
+        }
+    )
+    ui.run(
+        title="海上风电场集电线路优化",
+        host="127.0.0.1",
+        port=target_port,
+        reload=False,
+        window_size=(1280, 800),
+        native=True,
+    )
 else:
     # 普通使用环境保留日志功能
     # ui.run(title="海上风电场集电线路优化", host='127.0.0.1', reload=True, port=target_port, native=False)
-    ui.run(title="海上风电场集电线路优化", host='127.0.0.1', port=target_port, reload=True, window_size=(1280, 800),native=True)
+    ui.run(
+        title="海上风电场集电线路优化",
+        host="127.0.0.1",
+        port=target_port,
+        reload=False,
+        window_size=(1280, 800),
+        native=True,
+    )