Refactor: Fix type safety and auth

src/pages/ManufacturerRides.tsx

@@ -105,7 +105,16 @@ export default function ManufacturerRides() {
         return;
       }
 
-      const submissionData = {
+      if (!manufacturer) {
+        toast({
+          title: "Error",
+          description: "Manufacturer information is missing.",
+          variant: "destructive"
+        });
+        return;
+      }
+
+      const submissionData: RideSubmissionData = {
         ...data,
         manufacturer_id: manufacturer.id,
       };
@@ -200,10 +209,12 @@ export default function ManufacturerRides() {
               <FerrisWheel className="w-8 h-8 text-primary" />
               <h1 className="text-4xl font-bold">Rides by {manufacturer.name}</h1>
             </div>
-            <Button onClick={() => setIsCreateModalOpen(true)}>
-              <Plus className="w-4 h-4 mr-2" />
-              Add Ride
-            </Button>
+            {user && (
+              <Button onClick={() => setIsCreateModalOpen(true)}>
+                <Plus className="w-4 h-4 mr-2" />
+                Add Ride
+              </Button>
+            )}
           </div>
           <p className="text-lg text-muted-foreground mb-4">
             Explore all rides manufactured by {manufacturer.name}