fix(profile): use existing get_active_profile_name() for /profile command

Replace inline Path.home() / '.hermes' / 'profiles' detection in both CLI
and gateway /profile handlers with the existing get_active_profile_name()
from hermes_cli.profiles — which already handles custom-root deployments,
standard profiles, and Docker layouts.

Fixes /profile incorrectly reporting 'default' when HERMES_HOME points to
a custom-root profile path like /opt/data/profiles/coder.

Based on PR #10484 by Xowiek.

cli.py

@@ -3897,23 +3897,14 @@ class HermesCLI:
     
     def _handle_profile_command(self):
         """Display active profile name and home directory."""
-        from hermes_constants import get_hermes_home, display_hermes_home
+        from hermes_constants import display_hermes_home
+        from hermes_cli.profiles import get_active_profile_name
 
-        home = get_hermes_home()
         display = display_hermes_home()
-
-        profiles_parent = Path.home() / ".hermes" / "profiles"
-        try:
-            rel = home.relative_to(profiles_parent)
-            profile_name = str(rel).split("/")[0]
-        except ValueError:
-            profile_name = None
+        profile_name = get_active_profile_name()
 
         print()
-        if profile_name:
-            print(f"  Profile: {profile_name}")
-        else:
-            print("  Profile: default")
+        print(f"  Profile: {profile_name}")
         print(f"  Home:    {display}")
         print()