added in admin pages to add models and parts

src/app/admin/models/new/page.js

@@ -0,0 +1,48 @@
+"use client";
+
+import { useState } from "react";
+import { supabaseBrowser } from "@/lib/supabaseClient";
+import { useRouter } from "next/navigation";
+
+export default function NewModelPage() {
+  const [form, setForm] = useState({
+    name: "",
+    brand: "",
+    scale: "",
+    chassis_type: "",
+    notes: "",
+  });
+
+  const router = useRouter();
+
+  async function save() {
+    const { error } = await supabaseBrowser.from("models").insert(form);
+    if (!error) router.push("/admin/models");
+  }
+
+  return (
+    <div>
+      <h1 className="text-2xl font-bold mb-6">Add New Model</h1>
+
+      <div className="space-y-4 max-w-lg">
+        {Object.entries(form).map(([key, value]) => (
+          <div key={key}>
+            <label className="block mb-1 capitalize">{key.replace("_", " ")}</label>
+            <input
+              className="w-full p-2 border rounded"
+              value={value}
+              onChange={(e) => setForm({ ...form, [key]: e.target.value })}
+            />
+          </div>
+        ))}
+
+        <button
+          onClick={save}
+          className="px-4 py-2 bg-black text-white rounded"
+        >
+          Save
+        </button>
+      </div>
+    </div>
+  );
+}