feat: add deep think feature (#311)

* feat: implement backend logic

* feat: implement api/config endpoint

* rename the symbol

* feat: re-implement configuration at client-side

* feat: add client-side of deep thinking

* fix backend bug

* feat: add reasoning block

* docs: update readme

* fix: translate into English

* fix: change icon to lightbulb

* feat: ignore more bad cases

* feat: adjust thinking layout, and implement auto scrolling

* docs: add comments

---------

Co-authored-by: Henry Li <henry1943@163.com>

web/src/core/messages/merge-message.ts

@@ -43,6 +43,11 @@ function mergeTextMessage(message: Message, event: MessageChunkEvent) {
     message.content += event.data.content;
     message.contentChunks.push(event.data.content);
   }
+  if (event.data.reasoning_content) {
+    message.reasoningContent = (message.reasoningContent ?? "") + event.data.reasoning_content;
+    message.reasoningContentChunks = message.reasoningContentChunks ?? [];
+    message.reasoningContentChunks.push(event.data.reasoning_content);
+  }
 }
 
 function mergeToolCallMessage(

web/src/core/messages/types.ts

@@ -17,6 +17,8 @@ export interface Message {
   isStreaming?: boolean;
   content: string;
   contentChunks: string[];
+  reasoningContent?: string;
+  reasoningContentChunks?: string[];
   toolCalls?: ToolCallRuntime[];
   options?: Option[];
   finishReason?: "stop" | "interrupt" | "tool_calls";