fix: switch provider and add zukijourney textgen parameter

gen_service/main.py

@@ -80,10 +80,20 @@ Output the prompt in a txt code block.""")
 
     
 
-def _gen_text(prompt):
+
+def _gen_text(prompt, use_zukijourney=False):
+    if use_zukijourney:
+        client = get_client()
+        response = client.chat.completions.create(
+                model="llama-3-70b-instruct",
+                messages=[{"role": "user", "content": prompt}],
+                max_tokens=800,
+                temperature=0.7,
+            )
+    else:
         client = get_g4f_client()
         response = client.chat.completions.create(
-            provider=g4f.Provider.PerplexityLabs,
+                provider=g4f.Provider.Llama,
                 model="llama-3-70b-instruct",
                 messages=[{"role": "user", "content": prompt}],
                 max_tokens=800,