fix: update server URL in README and settings for SurfSense plugin

surfsense_web/.env.example

@@ -1,4 +1,9 @@
 NEXT_PUBLIC_FASTAPI_BACKEND_URL=http://localhost:8000
+
+# Server-only. Backend URL behind the /api/v1/* proxy in next.config.ts.
+# Falls back to NEXT_PUBLIC_FASTAPI_BACKEND_URL when unset.
+BACKEND_PROXY_TARGET=https://your-internal-backend.example.com
+
 NEXT_PUBLIC_FASTAPI_BACKEND_AUTH_TYPE=LOCAL or GOOGLE
 NEXT_PUBLIC_ETL_SERVICE=UNSTRUCTURED or LLAMACLOUD or DOCLING
 NEXT_PUBLIC_ZERO_CACHE_URL=http://localhost:4848

surfsense_web/components/assistant-ui/connector-popup/connect-forms/components/obsidian-connect-form.tsx

@@ -14,7 +14,7 @@ const PLUGIN_RELEASES_URL =
 	"https://github.com/MODSetter/SurfSense/releases?q=obsidian&expanded=true";
 
 const BACKEND_URL =
-	process.env.NEXT_PUBLIC_FASTAPI_BACKEND_URL ?? "https://api.surfsense.com";
+	process.env.NEXT_PUBLIC_FASTAPI_BACKEND_URL ?? "https://surfsense.com";
 
 /**
  * Obsidian connect form for the plugin-only architecture.

surfsense_web/next.config.ts

@@ -44,6 +44,21 @@ const nextConfig: NextConfig = {
 		},
 	},
 
+	// Proxy /api/v1/* to the FastAPI backend. Keeps the real backend host
+	// out of the client bundle. BACKEND_PROXY_TARGET is server-only.
+	async rewrites() {
+		const target =
+			process.env.BACKEND_PROXY_TARGET ||
+			process.env.NEXT_PUBLIC_FASTAPI_BACKEND_URL ||
+			"http://localhost:8000";
+		return [
+			{
+				source: "/api/v1/:path*",
+				destination: `${target.replace(/\/+$/, "")}/api/v1/:path*`,
+			},
+		];
+	},
+
 	// Configure webpack (SVGR)
 	webpack: (config) => {
 		// SVGR: import *.svg as React components