Remove app_label text from root header, keep settings cog

The word "settings" (app_label) was showing next to "Rose Ash 2.0"
in the top bar. Removed that label while restoring the settings cog
icon on the right side of the menu bar.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/sexp/helpers.py

@@ -33,15 +33,19 @@ def get_asset_url(ctx: dict) -> str:
 
 def root_header_html(ctx: dict, *, oob: bool = False) -> str:
     """Build the root header row HTML."""
+    rights = ctx.get("rights") or {}
+    is_admin = rights.get("admin") if isinstance(rights, dict) else getattr(rights, "admin", False)
+    settings_url = call_url(ctx, "blog_url", "/settings/") if is_admin else ""
     return render(
         "header-row",
         cart_mini_html=ctx.get("cart_mini_html", ""),
         blog_url=call_url(ctx, "blog_url", ""),
         site_title=ctx.get("base_title", ""),
-        app_label=ctx.get("app_label", ""),
         nav_tree_html=ctx.get("nav_tree_html", ""),
         auth_menu_html=ctx.get("auth_menu_html", ""),
         nav_panel_html=ctx.get("nav_panel_html", ""),
+        settings_url=settings_url,
+        is_admin=is_admin,
         oob=oob,
     )