Nest TODO State in session data (#4361)

Co-authored-by: Alex Hancock <alexhancock@block.xyz>

ui/desktop/openapi.json

@@ -2123,6 +2123,11 @@
           "propertyName": "type"
         }
       },
+      "ExtensionData": {
+        "type": "object",
+        "description": "Extension data containing all extension states\nKeys are in format \"extension_name.version\" (e.g., \"todo.v0\")",
+        "additionalProperties": {}
+      },
       "ExtensionEntry": {
         "allOf": [
           {
@@ -3207,6 +3212,9 @@
             "type": "string",
             "description": "A short description of the session, typically 3 words or less"
           },
+          "extension_data": {
+            "$ref": "#/components/schemas/ExtensionData"
+          },
           "input_tokens": {
             "type": "integer",
             "format": "int32",
@@ -3229,11 +3237,6 @@
             "description": "ID of the schedule that triggered this session, if any",
             "nullable": true
           },
-          "todo_content": {
-            "type": "string",
-            "description": "Session-scoped TODO list content",
-            "nullable": true
-          },
           "total_tokens": {
             "type": "integer",
             "format": "int32",

ui/desktop/src/api/types.gen.ts

@@ -279,6 +279,14 @@ export type ExtensionConfig = {
     type: 'inline_python';
 };
 
+/**
+ * Extension data containing all extension states
+ * Keys are in format "extension_name.version" (e.g., "todo.v0")
+ */
+export type ExtensionData = {
+    [key: string]: unknown;
+};
+
 export type ExtensionEntry = ExtensionConfig & {
     type?: 'ExtensionEntry';
 } & {
@@ -682,6 +690,7 @@ export type SessionMetadata = {
      * A short description of the session, typically 3 words or less
      */
     description: string;
+    extension_data?: ExtensionData;
     /**
      * The number of input tokens used in the session. Retrieved from the provider's last usage.
      */
@@ -698,10 +707,6 @@ export type SessionMetadata = {
      * ID of the schedule that triggered this session, if any
      */
     schedule_id?: string | null;
-    /**
-     * Session-scoped TODO list content
-     */
-    todo_content?: string | null;
     /**
      * The total number of tokens used in the session. Retrieved from the provider's last usage.
      */