feat(admin): add MobileTabBar with 4 primary tabs + More trigger

src/components/admin/MobileTabBar.tsx

@@ -0,0 +1,94 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { useState } from "react";
+import MoreSheet from "@/components/admin/MoreSheet";
+
+const TABS = [
+  { label: "Home", href: "/admin/v2", icon: HomeIcon },
+  { label: "Orders", href: "/admin/v2/orders", icon: OrdersIcon },
+  { label: "Stops", href: "/admin/v2/stops", icon: StopsIcon },
+  { label: "Products", href: "/admin/v2/products", icon: ProductsIcon },
+];
+
+function HomeIcon({ active }: { active: boolean }) {
+  return (
+    <svg width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={active ? 2.5 : 2}>
+      <path d="M3 12L12 3l9 9M5 10v10h14V10" strokeLinecap="round" strokeLinejoin="round" />
+    </svg>
+  );
+}
+function OrdersIcon({ active }: { active: boolean }) {
+  return (
+    <svg width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={active ? 2.5 : 2}>
+      <path d="M3 3h2l2 13h12l2-9H6" strokeLinecap="round" strokeLinejoin="round" />
+      <circle cx="9" cy="20" r="1.5" /><circle cx="18" cy="20" r="1.5" />
+    </svg>
+  );
+}
+function StopsIcon({ active }: { active: boolean }) {
+  return (
+    <svg width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={active ? 2.5 : 2}>
+      <path d="M12 22s8-7.5 8-13a8 8 0 10-16 0c0 5.5 8 13 8 13z" strokeLinecap="round" strokeLinejoin="round" />
+      <circle cx="12" cy="9" r="2.5" />
+    </svg>
+  );
+}
+function ProductsIcon({ active }: { active: boolean }) {
+  return (
+    <svg width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={active ? 2.5 : 2}>
+      <path d="M3 7l9-4 9 4v10l-9 4-9-4V7z" strokeLinecap="round" strokeLinejoin="round" />
+      <path d="M3 7l9 4 9-4M12 11v10" strokeLinecap="round" strokeLinejoin="round" />
+    </svg>
+  );
+}
+
+export function MobileTabBar() {
+  const pathname = usePathname();
+  const [moreOpen, setMoreOpen] = useState(false);
+
+  return (
+    <>
+      <nav
+        aria-label="Primary"
+        className="fixed bottom-0 left-0 right-0 z-30 grid grid-cols-5 border-t"
+        style={{
+          height: "60px",
+          backgroundColor: "var(--color-bg)",
+          borderColor: "var(--color-surface-3)",
+        }}
+      >
+        {TABS.map((tab) => {
+          const active = pathname === tab.href || pathname?.startsWith(tab.href + "/");
+          return (
+            <Link
+              key={tab.href}
+              href={tab.href}
+              className="flex flex-col items-center justify-center gap-0.5 active:scale-95 transition-transform"
+              style={{ color: active ? "var(--color-accent)" : "var(--color-text-muted)" }}
+            >
+              <tab.icon active={active} />
+              <span className="text-[12px] font-semibold" style={{ letterSpacing: "0.02em" }}>{tab.label}</span>
+            </Link>
+          );
+        })}
+        <button
+          type="button"
+          onClick={() => setMoreOpen(true)}
+          className="flex flex-col items-center justify-center gap-0.5 active:scale-95 transition-transform"
+          style={{ color: "var(--color-text-muted)" }}
+          aria-label="Open more menu"
+        >
+          <svg width="28" height="28" viewBox="0 0 24 24" fill="currentColor">
+            <circle cx="5" cy="12" r="2" /><circle cx="12" cy="12" r="2" /><circle cx="19" cy="12" r="2" />
+          </svg>
+          <span className="text-[12px] font-semibold" style={{ letterSpacing: "0.02em" }}>More</span>
+        </button>
+      </nav>
+      <MoreSheet open={moreOpen} onClose={() => setMoreOpen(false)} />
+    </>
+  );
+}
+
+export default MobileTabBar;