这是使用PyQT5作为UI的首次提交,将后端和UI合并到1个工程中，统一使用了Python，没有使用JS和HTML

UI/ui_utils/splash_window.py

@@ -0,0 +1,220 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+启动和关闭提示窗口
+使用 tkinter 实现轻量级的提示界面
+"""
+
+import tkinter as tk
+from tkinter import ttk
+import threading
+import time
+
+
+class SplashWindow:
+    """启动提示窗口"""
+    
+    def __init__(self, title="正在启动", message="系统正在加载，请稍候..."):
+        self.window = None
+        self.title = title
+        self.message = message
+        self._closed = False
+        
+    def show(self):
+        """显示启动窗口（在单独线程中）"""
+        self._window_ready = threading.Event()
+        
+        def _create_window():
+            self.window = tk.Tk()
+            self.window.title(self.title)
+            
+            # 窗口大小和位置
+            width = 400
+            height = 150
+            screen_width = self.window.winfo_screenwidth()
+            screen_height = self.window.winfo_screenheight()
+            x = (screen_width - width) // 2
+            y = (screen_height - height) // 2
+            self.window.geometry(f"{width}x{height}+{x}+{y}")
+            
+            # 无边框、置顶
+            self.window.overrideredirect(True)
+            self.window.attributes('-topmost', True)
+            
+            # 背景色
+            self.window.configure(bg='#f0f0f0')
+            
+            # 创建主框架
+            main_frame = tk.Frame(self.window, bg='#f0f0f0', padx=20, pady=20)
+            main_frame.pack(fill=tk.BOTH, expand=True)
+            
+            # 标题
+            title_label = tk.Label(
+                main_frame,
+                text="跌落试验管理系统",
+                font=('Microsoft YaHei', 16, 'bold'),
+                bg='#f0f0f0',
+                fg='#333333'
+            )
+            title_label.pack(pady=(0, 10))
+            
+            # 提示信息
+            message_label = tk.Label(
+                main_frame,
+                text=self.message,
+                font=('Microsoft YaHei', 11),
+                bg='#f0f0f0',
+                fg='#666666'
+            )
+            message_label.pack(pady=(0, 15))
+            
+            # 进度条
+            self.progress = ttk.Progressbar(
+                main_frame,
+                mode='indeterminate',
+                length=350
+            )
+            self.progress.pack()
+            self.progress.start(10)  # 开始动画
+            
+            # 边框
+            border_frame = tk.Frame(self.window, bg='#3A84FF', bd=0)
+            border_frame.place(x=0, y=0, relwidth=1, height=3)
+            
+            # 强制刷新显示
+            self.window.update_idletasks()
+            self.window.update()
+            
+            # 标记窗口已准备好
+            self._window_ready.set()
+            
+            # 运行主循环
+            self.window.mainloop()
+        
+        # 在单独线程中创建窗口
+        self.thread = threading.Thread(target=_create_window, daemon=True)
+        self.thread.start()
+        
+        # 等待窗口创建完成（最多等待2秒）
+        self._window_ready.wait(timeout=2.0)
+    
+    def close(self):
+        """关闭启动窗口"""
+        if self.window and not self._closed:
+            try:
+                self._closed = True
+                # 在 tkinter 线程中关闭窗口
+                if self.window:
+                    self.window.after(0, self._safe_close)
+                    # 等待线程结束（最多0.5秒）
+                    if self.thread and self.thread.is_alive():
+                        self.thread.join(timeout=0.5)
+            except Exception as e:
+                print(f"关闭启动窗口时出错: {e}")
+    
+    def _safe_close(self):
+        """安全关闭窗口（在 tkinter 线程中执行）"""
+        try:
+            if self.window:
+                self.window.quit()
+                self.window.destroy()
+        except Exception as e:
+            print(f"关闭窗口时出错: {e}")
+
+
+class ClosingWindow:
+    """关闭提示窗口"""
+    
+    def __init__(self, title="正在关闭", message="系统正在关闭，请稍候..."):
+        self.window = None
+        self.title = title
+        self.message = message
+        self._closed = False
+        
+    def show(self):
+        """显示关闭窗口（在主线程中）"""
+        self.window = tk.Tk()
+        self.window.title(self.title)
+        
+        # 窗口大小和位置
+        width = 400
+        height = 150
+        screen_width = self.window.winfo_screenwidth()
+        screen_height = self.window.winfo_screenheight()
+        x = (screen_width - width) // 2
+        y = (screen_height - height) // 2
+        self.window.geometry(f"{width}x{height}+{x}+{y}")
+        
+        # 无边框、置顶
+        self.window.overrideredirect(True)
+        self.window.attributes('-topmost', True)
+        
+        # 背景色
+        self.window.configure(bg='#f0f0f0')
+        
+        # 创建主框架
+        main_frame = tk.Frame(self.window, bg='#f0f0f0', padx=20, pady=20)
+        main_frame.pack(fill=tk.BOTH, expand=True)
+        
+        # 标题
+        title_label = tk.Label(
+            main_frame,
+            text="跌落试验管理系统",
+            font=('Microsoft YaHei', 16, 'bold'),
+            bg='#f0f0f0',
+            fg='#333333'
+        )
+        title_label.pack(pady=(0, 10))
+        
+        # 提示信息
+        message_label = tk.Label(
+            main_frame,
+            text=self.message,
+            font=('Microsoft YaHei', 11),
+            bg='#f0f0f0',
+            fg='#666666'
+        )
+        message_label.pack(pady=(0, 15))
+        
+        # 进度条
+        """
+        self.progress = ttk.Progressbar(
+            main_frame,
+            mode='indeterminate',
+            length=350
+        )
+        self.progress.pack()
+        self.progress.start(10)  # 开始动画
+        """
+        # 边框
+        border_frame = tk.Frame(self.window, bg='#ff6b6b', bd=0)
+        border_frame.place(x=0, y=0, relwidth=1, height=3)
+        
+        # 刷新窗口
+        self.window.update()
+    
+    def close(self):
+        """关闭窗口"""
+        if self.window and not self._closed:
+            try:
+                self._closed = True
+                self.window.quit()
+                self.window.destroy()
+            except Exception as e:
+                print(f"关闭提示窗口时出错: {e}")
+    
+    def update_message(self, message):
+        """更新提示信息"""
+        if self.window:
+            try:
+                # 查找message_label并更新
+                for widget in self.window.winfo_children():
+                    if isinstance(widget, tk.Frame):
+                        for child in widget.winfo_children():
+                            if isinstance(child, tk.Label) and child.cget('font')[1] == 11:
+                                child.config(text=message)
+                                break
+                self.window.update()
+            except Exception as e:
+                print(f"更新提示信息时出错: {e}")