fix: make profile subprocess HOME policy explicit

agent/copilot_acp_client.py

@@ -70,16 +70,6 @@ def _resolve_args() -> list[str]:
 
 def _resolve_home_dir() -> str:
     """Return a stable HOME for child ACP processes."""
-
-    try:
-        from hermes_constants import get_subprocess_home
-
-        profile_home = get_subprocess_home()
-        if profile_home:
-            return profile_home
-    except Exception:
-        pass
-
     home = os.environ.get("HOME", "").strip()
     if home:
         return home
@@ -107,12 +97,8 @@ def _build_subprocess_env() -> dict[str, str]:
     env = os.environ.copy()
     home = _resolve_home_dir()
     env["HOME"] = home
-    # Always expose the real user home so child scripts can find
-    # ~/.hermes/ even when HOME is overridden for profile isolation.
-    from hermes_constants import get_real_home
-    real = get_real_home()
-    if real and real != home:
-        env["HERMES_REAL_HOME"] = real
+    from hermes_constants import apply_subprocess_home_env
+    apply_subprocess_home_env(env)
     return env