ui(sidebar): rename Hermes nav entry to Giellie

The webview shortcut in the "Other" sidebar group now displays as
"Giellie" instead of "Hermes". Only the visible label changes — the
underlying /webview?src=hermes URL parameter and the ALLOWED-map
key in src/app/(app)/webview/page.tsx are untouched, since those
are internal identifiers (the URL key is what looks up the embeddable
iframe in the ALLOWED whitelist, not a user-facing string).

If you want the internal key renamed too, that's a follow-up that
needs to update both the sidebar link and the ALLOWED map in the
webview route in the same commit.

Co-authored-by: Orca <help@stably.ai>

src/components/sidebar.tsx

@@ -123,7 +123,7 @@ const stockNavItems: NavEntry[] = [
 // clearer home.
 const otherItems: NavEntry[] = [
   { href: "/repairs", label: "Repairs", icon: Wrench },
-  { href: "/webview?src=hermes", label: "Hermes", icon: Globe },
+  { href: "/webview?src=hermes", label: "Giellie", icon: Globe },
 ];
 
 /* ============================================================================