feat: add gateway auto-start on boot and real health detection

- Auto-detect gateway connectivity on server startup, start gateway if not running
- Fix /health endpoint to actually check gateway reachability instead of just CLI version
- Fix MiniMax CN base_url from /anthropic to /v1
- Frontend connection status now reflects real gateway state

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/services/hermes-cli.ts

@@ -182,7 +182,17 @@ export async function getVersion(): Promise<string> {
 }
 
 /**
- * Update Hermes Agent
+ * Start Hermes gateway
+ */
+export async function startGateway(): Promise<string> {
+  const { stdout, stderr } = await execFileAsync('hermes', ['gateway', 'start'], {
+    timeout: 30000,
+  })
+  return stdout || stderr
+}
+
+/**
+ * Restart Hermes gateway
  */
 export async function restartGateway(): Promise<string> {
   const { stdout, stderr } = await execFileAsync('hermes', ['gateway', 'restart'], {