feat: add OpenAI GPT-OSS 120B model option to configuration and UI

configs/config.py

@@ -71,6 +71,7 @@ class ModelConfig:
         {"id": "meta-llama/llama-4-scout-17b-16e-instruct", "name": "Llama 4 Scout 17B"},
         {"id": "llama-3.1-8b-instant", "name": "Llama 3.1 8B Instant"},
         {"id": "llama-3.3-70b-versatile", "name": "Llama 3.3 70b Versatile"},
+        {"id": "openai/gpt-oss-120b", "name": "GPT-OSS 120B"}
     ]
     
     @classmethod

static/index.html

@@ -36,6 +36,7 @@
                         <option value="meta-llama/llama-4-scout-17b-16e-instruct">Llama 4 Scout 17B</option>
                         <option value="llama-3.1-8b-instant">Llama 3.1 8B Instant</option>
                         <option value="llama-3.3-70b-versatile">Llama 3.3 70B Versatile</option>
+                        <option value="openai/gpt-oss-120b">OpenAI GPT-oss-120b</option>
                     </select>
                 </div>
                 <div class="session-info hidden" id="session-info">