feat: lock down registration and enforce partner-only logins

shop/components/auth-button.tsx

@@ -21,9 +21,6 @@ export async function AuthButton() {
       <Button asChild size="sm" variant={"outline"}>
         <Link href="/auth/login">Sign in</Link>
       </Button>
-      <Button asChild size="sm" variant={"default"}>
-        <Link href="/auth/sign-up">Sign up</Link>
-      </Button>
     </div>
   );
 }

shop/components/login-form.tsx

@@ -83,21 +83,12 @@ export function LoginForm({
                   onChange={(e) => setPassword(e.target.value)}
                 />
               </div>
-              {error && <p className="text-sm text-red-500">{error}</p>}
-              <Button type="submit" className="w-full" disabled={isLoading}>
-                {isLoading ? "Logging in..." : "Login"}
-              </Button>
-            </div>
-            <div className="mt-4 text-center text-sm">
-              Don&apos;t have an account?{" "}
-              <Link
-                href="/auth/sign-up"
-                className="underline underline-offset-4"
-              >
-                Sign up
-              </Link>
-            </div>
-          </form>
+            {error && <p className="text-sm text-red-500">{error}</p>}
+            <Button type="submit" className="w-full" disabled={isLoading}>
+              {isLoading ? "Logging in..." : "Login"}
+            </Button>
+          </div>
+        </form>
         </CardContent>
       </Card>
     </div>