feat: 添加多厂商内容管道功能并增强核心代码文档

refactor: 重构循环机制和系统提示架构

docs: 更新核心代码和系统提示的详细文档

Author: tt-a1i

src/App.tsx

@@ -73,6 +73,7 @@ const RequestTokenizerAnimation = lazy(() => import('./pages/RequestTokenizerAni
 const ResultCacheAnimation = lazy(() => import('./pages/ResultCacheAnimation').then(m => ({ default: m.ResultCacheAnimation })));
 const TerminalSerializerAnimation = lazy(() => import('./pages/TerminalSerializerAnimation').then(m => ({ default: m.TerminalSerializerAnimation })));
 const ContentConverterAnimation = lazy(() => import('./pages/ContentConverterAnimation').then(m => ({ default: m.ContentConverterAnimation })));
+const MultiProviderPipelineAnimation = lazy(() => import('./pages/MultiProviderPipelineAnimation'));
 const SmartEditAnimation = lazy(() => import('./pages/SmartEditAnimation').then(m => ({ default: m.SmartEditAnimation })));
 const VimBufferAnimation = lazy(() => import('./pages/VimBufferAnimation').then(m => ({ default: m.VimBufferAnimation })));
 const ChatCompressionAnimation = lazy(() => import('./pages/ChatCompressionAnimation').then(m => ({ default: m.ChatCompressionAnimation })));
@@ -325,6 +326,8 @@ function App() {
         return <TerminalSerializerAnimation />;
       case 'content-converter-anim':
         return <ContentConverterAnimation />;
+      case 'multi-provider-pipeline-anim':
+        return <MultiProviderPipelineAnimation />;
       case 'smart-edit-anim':
         return <SmartEditAnimation />;
       case 'vim-buffer-anim':

src/nav.ts

@@ -153,6 +153,7 @@ export const navGroups: NavGroup[] = [
       { id: 'result-cache-anim', label: '文件搜索缓存', highlight: true },
       { id: 'terminal-serializer-anim', label: '终端序列化器', highlight: true },
       { id: 'content-converter-anim', label: 'OpenAI 内容转换', highlight: true },
+      { id: 'multi-provider-pipeline-anim', label: '多厂商内容管道', highlight: true },
       { id: 'smart-edit-anim', label: 'Smart Edit 替换引擎', highlight: true },
       { id: 'vim-buffer-anim', label: 'Vim 文本缓冲区', highlight: true },
       { id: 'chat-compression-anim', label: '聊天压缩分割点', highlight: true },