docs: refresh current project snapshot

.env.example

@@ -21,6 +21,9 @@
 # Default workspace directory shown on first launch
 # HERMES_WEBUI_DEFAULT_WORKSPACE=~/workspace
 
+# Optional model override. Leave unset to use the active Hermes provider default.
+# HERMES_WEBUI_DEFAULT_MODEL=
+
 # Base directory for all Hermes state (affects all paths above if set)
 # HERMES_HOME=~/.hermes