feat(web): add workspace-aware session flow

packages/client/ui-slots/src/index.ts

@@ -74,8 +74,8 @@ export interface SessionStandardProps {}
 
 /**
  * Framework standard kit delivered to EVERY slot component (the global seat).
- * Declared empty here; the runtime package merges `useSessions` (the session
- * list selector hook — the sidebar tree's single derivation source).
+ * Declared empty here; the runtime package merges the global object-layer
+ * selector hooks that shared page composition consumes.
  */
 export interface GlobalStandardProps {}
 

packages/client/ui-slots/src/renderer.ts

@@ -98,6 +98,11 @@ export interface SlotRendererHost {
      */
     cell(id: string): SessionCell | undefined
   }
+  /** Workspace-side standard-kit sources. */
+  workspaces: {
+    /** Workspace list source backing the useWorkspaces standard hook. */
+    list: HostObservable<unknown>
+  }
 }
 
 /** The install seam: runtime owns install()/renderSlot(); web-react implements rendering. */