统一使用 public logo 资源

- 登录页、侧栏和 favicon 统一引用 public/logo.png 暴露的 /logo.png。

- 删除根目录 logo_square.png 和 Express 中单独提供该文件的路由。

- 同步更新组件测试、项目文档和历史工程分析说明，避免继续引用旧 logo_square。

- 同步整理 ../Seg_Server_Docker 部署包，仅保留 public/logo.png 并更新前端 Docker 构建配置。

src/components/Login.test.tsx

@@ -55,7 +55,7 @@ describe('Login', () => {
   it('uses the product logo and updated system title copy', () => {
     render(<Login />);
 
-    expect(screen.getByAltText('Logo')).toHaveAttribute('src', expect.stringContaining('logo_square'));
+    expect(screen.getByAltText('Logo')).toHaveAttribute('src', expect.stringContaining('logo.png'));
     expect(screen.getByText('多模态影像及视频智能语义分割与标注系统')).toBeInTheDocument();
     expect(screen.getByText('智能语义分割系统')).toBeInTheDocument();
     expect(screen.queryByText('欢迎登录协同工作站')).not.toBeInTheDocument();

src/components/Login.tsx

@@ -33,7 +33,7 @@ export function Login() {
       <div className="relative z-10 w-full max-w-md p-8 bg-[#111] border border-white/5 rounded-2xl shadow-2xl scale-in shadow-black/50">
         <div className="flex flex-col items-center mb-8">
           <div className="w-16 h-16 bg-white rounded-2xl flex items-center justify-center text-cyan-500 shadow-lg shadow-cyan-500/20 mb-4 overflow-hidden border border-white/10">
-            <img src="/logo_square.png" alt="Logo" className="h-full w-full object-contain" />
+            <img src="/logo.png" alt="Logo" className="h-full w-full object-contain" />
           </div>
           <h1 className="text-center text-2xl font-bold text-white tracking-wider mb-2">多模态影像及视频智能语义分割与标注系统</h1>
           <p className="text-sm text-gray-500">智能语义分割系统</p>

src/components/Sidebar.test.tsx

@@ -41,10 +41,10 @@ describe('Sidebar', () => {
     expect(screen.getByTitle('AI智能分割').querySelector('[data-testid="ai-segmentation-icon"]')).toBeInTheDocument();
   });
 
-  it('uses the root logo_square asset for the sidebar logo', () => {
+  it('uses the public logo asset for the sidebar logo', () => {
     render(<Sidebar activeModule="dashboard" setActiveModule={vi.fn()} />);
 
-    expect(screen.getByAltText('Logo')).toHaveAttribute('src', expect.stringContaining('logo_square'));
+    expect(screen.getByAltText('Logo')).toHaveAttribute('src', expect.stringContaining('logo.png'));
   });
 
   it('uses a logout icon and prevents the logout tooltip from catching workspace hover', () => {

src/components/Sidebar.tsx

@@ -26,7 +26,7 @@ export function Sidebar({ activeModule, setActiveModule }: SidebarProps) {
   return (
     <aside className="w-16 flex flex-col items-center py-6 bg-[#0d0d0d] border-r border-white/10 z-50 gap-8">
       <div className="w-10 h-10 rounded-lg overflow-hidden flex items-center justify-center bg-white">
-        <img src="/logo_square.png" alt="Logo" className="h-full w-full object-contain" />
+        <img src="/logo.png" alt="Logo" className="h-full w-full object-contain" />
       </div>
       <nav className="flex flex-col gap-6 w-full px-2">
         {navItems.map((item) => {