Refactor clawx (#344)

Co-authored-by: ashione <skyzlxuan@gmail.com>

electron/gateway/connection-monitor.ts

@@ -0,0 +1,59 @@
+import { logger } from '../utils/logger';
+
+type HealthResult = { ok: boolean; error?: string };
+
+export class GatewayConnectionMonitor {
+  private pingInterval: NodeJS.Timeout | null = null;
+  private healthCheckInterval: NodeJS.Timeout | null = null;
+
+  startPing(sendPing: () => void, intervalMs = 30000): void {
+    if (this.pingInterval) {
+      clearInterval(this.pingInterval);
+    }
+
+    this.pingInterval = setInterval(() => {
+      sendPing();
+    }, intervalMs);
+  }
+
+  startHealthCheck(options: {
+    shouldCheck: () => boolean;
+    checkHealth: () => Promise<HealthResult>;
+    onUnhealthy: (errorMessage: string) => void;
+    onError: (error: unknown) => void;
+    intervalMs?: number;
+  }): void {
+    if (this.healthCheckInterval) {
+      clearInterval(this.healthCheckInterval);
+    }
+
+    this.healthCheckInterval = setInterval(async () => {
+      if (!options.shouldCheck()) {
+        return;
+      }
+
+      try {
+        const health = await options.checkHealth();
+        if (!health.ok) {
+          const errorMessage = health.error ?? 'Health check failed';
+          logger.warn(`Gateway health check failed: ${errorMessage}`);
+          options.onUnhealthy(errorMessage);
+        }
+      } catch (error) {
+        logger.error('Gateway health check error:', error);
+        options.onError(error);
+      }
+    }, options.intervalMs ?? 30000);
+  }
+
+  clear(): void {
+    if (this.pingInterval) {
+      clearInterval(this.pingInterval);
+      this.pingInterval = null;
+    }
+    if (this.healthCheckInterval) {
+      clearInterval(this.healthCheckInterval);
+      this.healthCheckInterval = null;
+    }
+  }
+}