refactor(desktop): extract hidden Playwright CDP target helper

Move CDPTargetDescriptor and the reclaim predicate out of
playwright-cdp.ts into a dedicated module so the reclamation rule can be
unit-tested in isolation and reused without pulling in the whole hidden
browser manager.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/main/playwright-cdp.ts

@@ -2,6 +2,10 @@ import { BrowserWindow, nativeTheme } from "electron/main";
 import type { BrowserWindow as ElectronBrowserWindow, Session } from "electron/main";
 import type { Browser as PlaywrightBrowser, Page as PlaywrightPage } from "playwright-core";
 
+import {
+  isReclaimableHiddenPlaywrightTarget,
+  type CDPTargetDescriptor,
+} from "./playwright-cdp-targets";
 import { STANDARD_USER_AGENT } from "./user-agent";
 
 const hiddenPlaywrightIdleTTLms = 5 * 60_000;
@@ -13,13 +17,6 @@ const cdpPort = Number.parseInt(process.env.GEO_ELECTRON_CDP_PORT ?? "9339", 10)
 const cdpEndpointURL = `http://127.0.0.1:${cdpPort}`;
 const cdpTargetsListURL = `${cdpEndpointURL}/json/list`;
 
-interface CDPTargetDescriptor {
-  id?: string;
-  type?: string;
-  title?: string;
-  url?: string;
-}
-
 interface HiddenPlaywrightRecord {
   key: string;
   accountId: string;
@@ -347,7 +344,7 @@ async function pruneStaleCDPTargets(): Promise<number> {
 
   let closedCount = 0;
   for (const target of targets) {
-    if (!isStaleCDPTarget(target)) {
+    if (!isReclaimableHiddenPlaywrightTarget(target)) {
       continue;
     }
 
@@ -368,16 +365,6 @@ async function pruneStaleCDPTargets(): Promise<number> {
   return closedCount;
 }
 
-function isStaleCDPTarget(target: CDPTargetDescriptor): boolean {
-  if ((target.type ?? "").trim() !== "page") {
-    return false;
-  }
-  if (!(target.id ?? "").trim()) {
-    return false;
-  }
-  return !(target.title ?? "").trim() && !(target.url ?? "").trim();
-}
-
 function isConnectOverCDPTimeout(error: unknown): boolean {
   return error instanceof Error
     && error.name === "TimeoutError"