add title to thinking steps

Author: ranst91

python-sdk/ag_ui/core/events.py

@@ -149,6 +149,7 @@ class ThinkingStartEvent(BaseEvent):
     Event indicating the start of a thinking step event.
     """
     type: Literal[EventType.THINKING_START]
+    title: Optional[str] = 'Thinking...'
 
 class ThinkingEndEvent(BaseEvent):
     """

typescript-sdk/packages/core/src/events.ts

@@ -125,6 +125,7 @@ export const ToolCallChunkEventSchema = BaseEventSchema.extend({
 
 export const ThinkingStartEventSchema = BaseEventSchema.extend({
   type: z.literal(EventType.THINKING_START),
+  title: z.string().optional().default("Thinking..."),
 });
 
 export const ThinkingEndEventSchema = BaseEventSchema.extend({