fix(app): treat workspace diff stats as authoritative

packages/app/src/contexts/session-context.tsx

@@ -34,7 +34,6 @@ import {
   type Agent,
   type SessionState,
   type WorkspaceDescriptor,
-  mergeWorkspaceSnapshotWithExisting,
   normalizeWorkspaceDescriptor,
 } from "@/stores/session-store";
 import { useDraftStore } from "@/stores/draft-store";
@@ -348,7 +347,6 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
       }
 
       const workspaces = new Map<string, WorkspaceDescriptor>();
-      const existingWorkspaces = useSessionStore.getState().sessions[serverId]?.workspaces;
       let cursor: string | null = null;
       let includeSubscribe = options?.subscribe ?? false;
 
@@ -364,13 +362,7 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
 
         for (const entry of payload.entries) {
           const workspace = normalizeWorkspaceDescriptor(entry);
-          workspaces.set(
-            workspace.id,
-            mergeWorkspaceSnapshotWithExisting({
-              incoming: workspace,
-              existing: existingWorkspaces?.get(workspace.id),
-            }),
-          );
+          workspaces.set(workspace.id, workspace);
         }
 
         if (!payload.pageInfo.hasMore || !payload.pageInfo.nextCursor) {