feat: added model options for GPT-5.4 families; updated default model to gpt-5.4-mini

public/config.json

@@ -6,7 +6,7 @@
         "openai": {
             "api_key": "",
             "flex": false,
-            "model": "gpt-5.2"
+            "model": "gpt-5.4-mini"
         },
         "gemini": {
             "api_key": "",

src/components/settings/sections/GeneralSettings.tsx

@@ -253,6 +253,9 @@ const GeneralSettings: React.FC = () => {
               value={openaiModel}
               onChange={(e) => handleOpenaiModelChange(e.target.value)}
             >
+              <option value="gpt-5.4">gpt-5.4</option>
+              <option value="gpt-5.4-mini">gpt-5.4-mini</option>
+              <option value="gpt-5.4-nano">gpt-5.4-nano</option>
               <option value="gpt-5.2">gpt-5.2</option>
               <option value="gpt-5-mini">gpt-5-mini</option>
               <option value="gpt-5-nano">gpt-5-nano</option>

src/core/config/ConfigManager.ts

@@ -178,7 +178,7 @@ export class ConfigManager {
           openai: {
             api_key: '',
             flex: false,
-            model: 'gpt-5.2'
+            model: 'gpt-5.4-mini'
           },
           gemini: {
             api_key: '',