chore(server): update config naming (#13419)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Updated scenario names and options for Copilot, including new and
renamed scenarios such as "audio_transcribing,"
"complex_text_generation," "quick_decision_making,"
"quick_text_generation," and "polish_and_summarize."
* Enhanced support for customizing and overriding default model
assignments in Copilot scenarios.

* **Bug Fixes**
* Improved consistency and clarity in scenario configuration and prompt
selection.

* **Documentation**
* Updated descriptions in configuration interfaces to better explain the
ability to use custom models and override defaults.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/config.ts

@@ -46,20 +46,20 @@ defineModuleConfig('copilot', {
     default: false,
   },
   scenarios: {
-    desc: 'The models used in the scene for the copilot, will use this config if enabled.',
+    desc: 'Use custom models in scenarios and override default settings.',
     default: {
-      enabled: false,
+      override_enabled: false,
       scenarios: {
-        audio: 'gemini-2.5-flash',
+        audio_transcribing: 'gemini-2.5-flash',
         chat: 'claude-sonnet-4@20250514',
         embedding: 'gemini-embedding-001',
         image: 'gpt-image-1',
         rerank: 'gpt-4.1',
-        brainstorm: 'gpt-4o-2024-08-06',
         coding: 'claude-sonnet-4@20250514',
-        quick_decision: 'gpt-4.1-mini',
-        quick_written: 'gemini-2.5-flash',
-        summary_inspection: 'gemini-2.5-flash',
+        complex_text_generation: 'gpt-4o-2024-08-06',
+        quick_decision_making: 'gpt-4.1-mini',
+        quick_text_generation: 'gemini-2.5-flash',
+        polish_and_summarize: 'gemini-2.5-flash',
       },
     },
   },