Add /version slash command across CLI, gateway, TUI, and desktop.

Surfaces Hermes Agent version info on demand without leaving chat; works mid-run like /help and /update.

hermes_cli/commands.py

@@ -216,6 +216,7 @@ COMMAND_REGISTRY: list[CommandDef] = [
     CommandDef("image", "Attach a local image file for your next prompt", "Info",
                cli_only=True, args_hint="<path>"),
     CommandDef("update", "Update Hermes Agent to the latest version", "Info"),
+    CommandDef("version", "Show Hermes Agent version", "Info", aliases=("v",)),
     CommandDef("debug", "Upload debug report (system info + logs) and get shareable links", "Info"),
 
     # Exit
@@ -349,6 +350,7 @@ ACTIVE_SESSION_BYPASS_COMMANDS: frozenset[str] = frozenset(
         "steer",
         "stop",
         "update",
+        "version",
     }
 )