feat: Implement compliance document analysis and chat functionality

- Added API functions for document analysis, compliance result retrieval, and chat streaming.
- Integrated document upload and analysis in CompliancePage with progress simulation.
- Enhanced DocsPage to load documents from the API and handle file uploads with parsing and embedding.
- Updated RagChatPage to fetch quick questions from the API and handle chat responses with streaming.
- Improved StatusPage to display system statistics and configuration from the API.
- Configured Vite to proxy API requests to the backend server.

src/api/status.ts

@@ -0,0 +1,19 @@
+import { fetchAPI, type SystemStats, type SystemConfig } from './index';
+
+// Get system statistics
+export async function getSystemStats(): Promise<SystemStats> {
+  return fetchAPI<SystemStats>('/status/stats');
+}
+
+// Get system configuration
+export async function getSystemConfig(): Promise<SystemConfig> {
+  return fetchAPI<SystemConfig>('/status/config');
+}
+
+// Get Milvus health status
+export async function getMilvusHealth(): Promise<{ connected: boolean; collections: string[] }> {
+  return fetchAPI('/status/milvus/health');
+}
+
+// Export types
+export type { SystemStats, SystemConfig };