Refactor clawx (#344)

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

electron/gateway/lifecycle-controller.ts

@@ -0,0 +1,31 @@
+import { logger } from '../utils/logger';
+import { isLifecycleSuperseded, nextLifecycleEpoch } from './process-policy';
+
+export class LifecycleSupersededError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'LifecycleSupersededError';
+  }
+}
+
+export class GatewayLifecycleController {
+  private epoch = 0;
+
+  getCurrentEpoch(): number {
+    return this.epoch;
+  }
+
+  bump(reason: string): number {
+    this.epoch = nextLifecycleEpoch(this.epoch);
+    logger.debug(`Gateway lifecycle epoch advanced to ${this.epoch} (${reason})`);
+    return this.epoch;
+  }
+
+  assert(expectedEpoch: number, phase: string): void {
+    if (isLifecycleSuperseded(expectedEpoch, this.epoch)) {
+      throw new LifecycleSupersededError(
+        `Gateway ${phase} superseded (expectedEpoch=${expectedEpoch}, currentEpoch=${this.epoch})`,
+      );
+    }
+  }
+}