perf(browser): upgrade agent-browser 0.13 -> 0.26, wire daemon idle timeout

Upgrades agent-browser from 0.13.0 to 0.26.0, picking up 13 releases of
daemon reliability fixes:

- Daemon hang on Linux from waitpid(-1) race in SIGCHLD handler (#1098)
- Chrome killed after ~10s idle due to PR_SET_PDEATHSIG thread tracking (#1157)
- Orphaned Chrome processes via process-group kill on shutdown (#1137)
- Stale daemon after upgrade via .version sidecar and auto-restart (#1134)
- Idle timeout not firing (sleep future recreated each loop) (#1110)
- Navigation hanging on lifecycle events that never fire (#1059, #1092)
- CDP attach hang on Chrome 144+ (#1133)
- Windows daemon TCP bind with Hyper-V port conflicts (#1041)
- Shadow DOM traversal in accessibility tree snapshots
- doctor command for user self-diagnosis

Also wires AGENT_BROWSER_IDLE_TIMEOUT_MS into the browser subprocess
environment so the daemon self-terminates after our configured inactivity
timeout (default 300s). This is the daemon-side counterpart to the
Python-side inactivity reaper — the daemon kills itself and its Chrome
children when no commands arrive, preventing orphan accumulation even
when the Python process dies without running atexit handlers.

Addresses #7343 (daemon socket hangs, shadow DOM) and #13793 (orphan
accumulation from force-killed sessions).

package.json

@@ -16,8 +16,8 @@
   },
   "homepage": "https://github.com/NousResearch/Hermes-Agent#readme",
   "dependencies": {
-    "agent-browser": "^0.13.0",
-    "@askjo/camofox-browser": "^1.5.2"
+    "@askjo/camofox-browser": "^1.5.2",
+    "agent-browser": "^0.26.0"
   },
   "overrides": {
     "lodash": "4.18.1"

tools/browser_tool.py

@@ -1182,6 +1182,15 @@ def _run_browser_command(
         # used during CLI discovery.
         browser_env["PATH"] = _merge_browser_path(browser_env.get("PATH", ""))
         browser_env["AGENT_BROWSER_SOCKET_DIR"] = task_socket_dir
+
+        # Tell the agent-browser daemon to self-terminate after being idle
+        # for our configured inactivity timeout.  This is the daemon-side
+        # counterpart to our Python-side _cleanup_inactive_browser_sessions
+        # — the daemon kills itself and its Chrome children when no CLI
+        # commands arrive within the window.  Added in agent-browser 0.24.
+        if "AGENT_BROWSER_IDLE_TIMEOUT_MS" not in browser_env:
+            idle_ms = str(BROWSER_SESSION_INACTIVITY_TIMEOUT * 1000)
+            browser_env["AGENT_BROWSER_IDLE_TIMEOUT_MS"] = idle_ms
         
         # Use temp files for stdout/stderr instead of pipes.
         # agent-browser starts a background daemon that inherits file