refactor: 调整UI布局和窗口配置

调整内容:
- 恢复窗口尺寸为1200x900，保持原有的显示效果
- 移除屏幕适配设置页面，简化应用结构
- 优化主容器滚动样式，添加smooth-scroll效果
- 移除AI分类设置页面的高度限制，改善内容显示

UI优化:
- 主容器添加overflow-y-auto和smooth-scroll
- AI分类设置页面移除max-h限制，提升用户体验
- 保持原有的响应式布局和间距设计

这些调整确保了应用在标准屏幕上的最佳显示效果

apps/desktop/src/App.tsx

@@ -17,7 +17,6 @@ import DebugPanelTool from './pages/tools/DebugPanelTool';
 import ChatTool from './pages/tools/ChatTool';
 import ChatTestPage from './pages/tools/ChatTestPage';
 import WatermarkTool from './pages/tools/WatermarkTool';
-import Settings from './pages/Settings';
 // import BatchThumbnailGenerator from './pages/tools/BatchThumbnailGenerator';
 
 import Navigation from './components/Navigation';
@@ -99,8 +98,8 @@ function App() {
         <Navigation />
 
         {/* 可滚动的主要内容区域 */}
-        <main className="flex-1 relative">
-          <div className="container mx-auto px-4 sm:px-6 lg:px-8 py-4 sm:py-6 lg:py-8 overflow-hidden max-w-full absolute top-0 left-0 right-0 bottom-0">
+        <main className="flex-1 ">
+          <div className="container mx-auto px-4 sm:px-6 lg:px-8 py-4 sm:py-6 lg:py-8 max-w-full max-h-full overflow-y-auto smooth-scroll">
             <Routes>
               <Route path="/" element={<ProjectList />} />
               <Route path="/project/:id" element={<ProjectDetails />} />
@@ -119,7 +118,6 @@ function App() {
               <Route path="/tools/ai-chat" element={<ChatTool />} />
               <Route path="/tools/chat-test" element={<ChatTestPage />} />
               <Route path="/tools/watermark" element={<WatermarkTool />} />
-              <Route path="/settings" element={<Settings />} />
               {/* <Route path="/tools/batch-thumbnail-generator" element={<BatchThumbnailGenerator />} /> */}
             </Routes>
           </div>

apps/desktop/src/pages/AiClassificationSettings.tsx

@@ -348,7 +348,7 @@ const AiClassificationSettings: React.FC = () => {
             </div>
 
             {/* 美观的分类卡片网格 - 优化滚动 */}
-            <div className="grid gap-4 max-h-[calc(100vh-16rem)] overflow-y-auto custom-scrollbar">
+            <div className="grid gap-4">
               {classifications.map((classification, index) => (
                 <div
                   key={classification.id}

apps/desktop/src/pages/ProjectDetails.tsx

@@ -1095,7 +1095,7 @@ export const ProjectDetails: React.FC = () => {
           </div>
 
           {/* 选项卡内容 */}
-          <div className="h-[calc(100vh-16rem)] overflow-y-auto custom-scrollbar">
+          <div className="h-full">
             {/* 项目概述选项卡 */}
             {activeTab === 'overview' && (
               <div className="p-4 md:p-6 space-y-6">