fix(generator): use endpoint.url directly in buildRequest to fix URL construction bug

The previous implementation used `new URL(endpoint.url, window.location.origin)`
which incorrectly constructed URLs based on the current page's origin. This broke
when endpoint URLs were already complete URLs (e.g., http://20.76.57.61:18080/...).

The fix uses endpoint.url directly since LLM extraction already provides complete
URLs. Also changed from GET with query params to POST with JSON body to match
typical API expectations.

🤖 Generated with [Qoder][https://qoder.com]

src/generated_scene/generator.rs

@@ -306,18 +306,12 @@ function validateArgs(args) {{
 }}
 
 function buildRequest(args, endpoint) {{
-  const url = new URL(endpoint.url, window.location.origin);
-  const params = {{ ...STATIC_PARAMS, ...args }};
-  for (const [key, value] of Object.entries(params)) {{
-    if (value !== undefined && value !== null) {{
-      url.searchParams.set(key, String(value));
-    }}
-  }}
-  return {{
-    url: url.toString(),
-    method: endpoint.method || 'GET',
-    headers: {{ 'Content-Type': 'application/json' }}
-  }};
+  // Use endpoint.url directly - it's already a complete URL
+  const url = endpoint.url;
+  const method = endpoint.method || 'POST';
+  const headers = {{ 'Content-Type': 'application/json' }};
+  const body = JSON.stringify({{ ...STATIC_PARAMS, ...args }});
+  return {{ url, method, headers, body }};
 }}
 
 function normalizeRows(rawData) {{
@@ -360,7 +354,8 @@ const defaultDeps = {{
     const request = buildRequest(args, endpoint);
     const response = await fetch(request.url, {{
       method: request.method,
-      headers: request.headers
+      headers: request.headers,
+      body: request.body
     }});
     if (!response.ok) throw new Error(`HTTP ${{response.status}}: ${{response.statusText}}`);
     return response.json();