feat: update environment configuration and enhance API integration

- Remove versioning from docker-compose.yml
- Enhance Vite configuration to support API proxying for development
- Improve error handling and data normalization in API service
- Add fallback values in PublicationsTable and ResearcherCard components
- Update sync functionality in DashboardPage to handle backend responses more effectively
- Refactor mockSyncResearcher to simulate backend response structure

frontend/vite.config.js

@@ -1,8 +1,27 @@
-import { defineConfig } from 'vite'
+import { defineConfig, loadEnv } from 'vite'
 import react from '@vitejs/plugin-react'
 import tailwindcss from '@tailwindcss/vite'
 
 // https://vite.dev/config/
-export default defineConfig({
-  plugins: [react(), tailwindcss()],
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '')
+  const proxyTarget = env.VITE_API_PROXY_TARGET || 'http://localhost:8000'
+
+  return {
+    plugins: [react(), tailwindcss()],
+    server: {
+      host: true,
+      port: 5173,
+      proxy: {
+        '/researchers': {
+          target: proxyTarget,
+          changeOrigin: true,
+        },
+        '/health': {
+          target: proxyTarget,
+          changeOrigin: true,
+        },
+      },
+    },
+  }
 })