fix: harden agent prompt handling

qimingclaw/crates/agent-electron-client/src/main/services/engines/acp/acpEngine.ts

@@ -79,7 +79,7 @@ import {
 import { processRegistry } from "../../system/processRegistry";
 import { t } from "../../i18n";
 import type { DetailedSession } from "@shared/types/sessions";
-import { ACP_ABORT_TIMEOUT } from "@shared/constants";
+import { ACP_ABORT_TIMEOUT, ACP_PROMPT_TIMEOUT } from "@shared/constants";
 import { APP_DATA_DIR_NAME } from "../../constants";
 import { perfEmitter } from "../perf/perfEmitter";
 import { firstTokenTrace } from "../perf/firstTokenTrace";
@@ -1520,8 +1520,20 @@ export class AcpEngine extends EventEmitter {
             const maxAttempts = this.engineName === "qimingcode" ? 2 : 1;
             let attempt = 1;
             while (true) {
+              let promptTimeout: ReturnType<typeof setTimeout> | undefined;
               try {
-                const res = await this.acpConnection!.prompt(promptParams);
+                const res = await Promise.race([
+                  this.acpConnection!.prompt(promptParams),
+                  new Promise<never>((_, reject) => {
+                    promptTimeout = setTimeout(() => {
+                      reject(
+                        new Error(
+                          `ACP prompt timed out after ${ACP_PROMPT_TIMEOUT}ms`,
+                        ),
+                      );
+                    }, ACP_PROMPT_TIMEOUT);
+                  }),
+                ]);
                 log.info(
                   `${this.logTag} 📥 ACP prompt resolved (${Date.now() - promptStartTime}ms, attempt=${attempt}):`,
                   safeStringify(res),
@@ -1529,9 +1541,20 @@ export class AcpEngine extends EventEmitter {
                 return res;
               } catch (err) {
                 const errMsg = this.toErrorMessage(err);
+                if (errMsg.includes("ACP prompt timed out")) {
+                  log.error(
+                    `${this.logTag} 📥 ACP prompt timed out (${Date.now() - promptStartTime}ms, attempt=${attempt})`,
+                    {
+                      sessionId,
+                      acpSessionId: session.acpSessionId,
+                      requestId: _opts?.messageID,
+                    },
+                  );
+                }
                 const canRetry =
                   attempt < maxAttempts &&
                   !this.isPromptCancellation(err) &&
+                  !errMsg.includes("ACP prompt timed out") &&
                   this.isMcpReconnectFailure(errMsg);
 
                 if (!canRetry) {
@@ -1569,6 +1592,10 @@ export class AcpEngine extends EventEmitter {
                 );
                 await this.sleep(MCP_RETRY_DELAY_MS);
                 attempt += 1;
+              } finally {
+                if (promptTimeout !== undefined) {
+                  clearTimeout(promptTimeout);
+                }
               }
             }
           };