Lock the right pane while focused, add project focus, quiet lead

api/openapi.yaml

@@ -108,7 +108,7 @@ paths:
               schema: { $ref: "#/components/schemas/Focus" }
     put:
       operationId: setFocus
-      description: Records the human switching the right pane's task or tab. The lead agent is told.
+      description: Records the human switching the right pane's project, task or tab.
       requestBody:
         required: true
         content:
@@ -123,6 +123,20 @@ paths:
         "400": { $ref: "#/components/responses/Error" }
         "404": { $ref: "#/components/responses/Error" }
 
+  /api/me/pane-focus:
+    put:
+      operationId: setPaneFocus
+      description: Records whether the human is working in the right pane. While they are, the lead agent can't move it.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema: { $ref: "#/components/schemas/PaneFocus" }
+      responses:
+        "204":
+          description: Recorded.
+        "400": { $ref: "#/components/responses/Error" }
+
   /api/push/key:
     get:
       operationId: getPushKey
@@ -1099,6 +1113,7 @@ components:
       type: object
       required: [tabs, tab]
       properties:
+        project_id: { type: string, description: The project the right pane shows; the task's project when task_id is set, absent for none. }
         task_id: { type: string, description: The task the right pane shows; absent for none. }
         tabs:
           type: array
@@ -1106,6 +1121,12 @@ components:
           items: { $ref: "#/components/schemas/TaskTab" }
         tab: { $ref: "#/components/schemas/TaskTab" }
 
+    PaneFocus:
+      type: object
+      required: [focused]
+      properties:
+        focused: { type: boolean, description: True while the browser window has focus and the focused element is inside the right pane. }
+
     TaskTab:
       type: string
       enum: [transcript, changes, files, inbox, todo]