fix(workspace): seed React Query cache at all list-acquisition points

- staleTime: 0 on fetchQuery after leave/delete so fresh data is fetched
- setQueryData before switchWorkspace in createWorkspace so sidebar is
  consistent on first render
- seed workspaceKeys.list() cache in login, Google callback, and
  settings save so the first useQuery(workspaceListOptions()) hit is free
- remove dead onError from WorkspaceStoreOptions (used only by the
  deleted refreshWorkspaces action)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/app/auth/callback/page.tsx

@@ -2,8 +2,10 @@
 
 import { Suspense, useEffect, useState } from "react";
 import { useSearchParams, useRouter } from "next/navigation";
+import { useQueryClient } from "@tanstack/react-query";
 import { useAuthStore } from "@multica/core/auth";
 import { useWorkspaceStore } from "@multica/core/workspace";
+import { workspaceKeys } from "@multica/core/workspace/queries";
 import { api } from "@multica/core/api";
 import {
   Card,
@@ -17,6 +19,7 @@ import { Loader2 } from "lucide-react";
 function CallbackContent() {
   const router = useRouter();
   const searchParams = useSearchParams();
+  const qc = useQueryClient();
   const loginWithGoogle = useAuthStore((s) => s.loginWithGoogle);
   const hydrateWorkspace = useWorkspaceStore((s) => s.hydrateWorkspace);
   const [error, setError] = useState("");
@@ -39,6 +42,7 @@ function CallbackContent() {
     loginWithGoogle(code, redirectUri)
       .then(async () => {
         const wsList = await api.listWorkspaces();
+        qc.setQueryData(workspaceKeys.list(), wsList);
         const lastWsId = localStorage.getItem("multica_workspace_id");
         await hydrateWorkspace(wsList, lastWsId);
         router.push("/issues");
@@ -46,7 +50,7 @@ function CallbackContent() {
       .catch((err) => {
         setError(err instanceof Error ? err.message : "Login failed");
       });
-  }, [searchParams, loginWithGoogle, hydrateWorkspace, router]);
+  }, [searchParams, loginWithGoogle, hydrateWorkspace, router, qc]);
 
   if (error) {
     return (

packages/core/workspace/mutations.ts

@@ -1,4 +1,5 @@
 import { useMutation, useQueryClient } from "@tanstack/react-query";
+import type { Workspace } from "../types";
 import { api } from "../api";
 import { workspaceKeys, workspaceListOptions } from "./queries";
 import { useWorkspaceStore } from "./index";
@@ -9,7 +10,8 @@ export function useCreateWorkspace() {
     mutationFn: (data: { name: string; slug: string; description?: string }) =>
       api.createWorkspace(data),
     onSuccess: (newWs) => {
-      // Switch to the newly created workspace immediately
+      // Add to cache before switching so sidebar list is consistent on first render
+      qc.setQueryData(workspaceKeys.list(), (old: Workspace[] = []) => [...old, newWs]);
       useWorkspaceStore.getState().switchWorkspace(newWs);
     },
     onSettled: () => {
@@ -25,8 +27,8 @@ export function useLeaveWorkspace() {
     onSuccess: async (_, workspaceId) => {
       const currentWsId = useWorkspaceStore.getState().workspace?.id;
       if (currentWsId === workspaceId) {
-        // Left our current workspace — refetch and pick another
-        const wsList = await qc.fetchQuery(workspaceListOptions());
+        // staleTime: 0 forces a real network fetch — cache still has the left workspace
+        const wsList = await qc.fetchQuery({ ...workspaceListOptions(), staleTime: 0 });
         useWorkspaceStore.getState().hydrateWorkspace(wsList);
       }
     },
@@ -43,8 +45,8 @@ export function useDeleteWorkspace() {
     onSuccess: async (_, workspaceId) => {
       const currentWsId = useWorkspaceStore.getState().workspace?.id;
       if (currentWsId === workspaceId) {
-        // Deleted our current workspace — refetch and pick another
-        const wsList = await qc.fetchQuery(workspaceListOptions());
+        // staleTime: 0 forces a real network fetch — cache still has the deleted workspace
+        const wsList = await qc.fetchQuery({ ...workspaceListOptions(), staleTime: 0 });
         useWorkspaceStore.getState().hydrateWorkspace(wsList);
       }
     },

packages/core/workspace/store.ts

@@ -8,7 +8,6 @@ const logger = createLogger("workspace-store");
 
 interface WorkspaceStoreOptions {
   storage?: StorageAdapter;
-  onError?: (message: string) => void;
 }
 
 interface WorkspaceState {

packages/views/auth/login-page.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useState, useEffect, useCallback, type ReactNode } from "react";
+import { useQueryClient } from "@tanstack/react-query";
 import {
   Card,
   CardHeader,
@@ -19,6 +20,7 @@ import {
 } from "@multica/ui/components/ui/input-otp";
 import { useAuthStore } from "@multica/core/auth";
 import { useWorkspaceStore } from "@multica/core/workspace";
+import { workspaceKeys } from "@multica/core/workspace/queries";
 import { api } from "@multica/core/api";
 import type { User } from "@multica/core/types";
 
@@ -87,6 +89,7 @@ export function LoginPage({
   lastWorkspaceId,
   onTokenObtained,
 }: LoginPageProps) {
+  const qc = useQueryClient();
   const [step, setStep] = useState<"email" | "code" | "cli_confirm">("email");
   const [email, setEmail] = useState("");
   const [code, setCode] = useState("");
@@ -167,6 +170,7 @@ export function LoginPage({
         // Normal path
         await useAuthStore.getState().verifyCode(email, value);
         const wsList = await api.listWorkspaces();
+        qc.setQueryData(workspaceKeys.list(), wsList);
         useWorkspaceStore.getState().hydrateWorkspace(wsList, lastWorkspaceId);
         onTokenObtained?.();
         onSuccess();
@@ -178,7 +182,7 @@ export function LoginPage({
         setLoading(false);
       }
     },
-    [email, onSuccess, cliCallback, lastWorkspaceId, onTokenObtained],
+    [email, onSuccess, cliCallback, lastWorkspaceId, onTokenObtained, qc],
   );
 
   const handleResend = async () => {

packages/views/settings/components/workspace-tab.tsx

@@ -18,19 +18,21 @@ import {
   AlertDialogAction,
 } from "@multica/ui/components/ui/alert-dialog";
 import { toast } from "sonner";
-import { useQuery } from "@tanstack/react-query";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
 import { useAuthStore } from "@multica/core/auth";
 import { useWorkspaceStore } from "@multica/core/workspace";
 import { useLeaveWorkspace, useDeleteWorkspace } from "@multica/core/workspace/mutations";
 import { useWorkspaceId } from "@multica/core/hooks";
-import { memberListOptions } from "@multica/core/workspace/queries";
+import { memberListOptions, workspaceKeys } from "@multica/core/workspace/queries";
 import { api } from "@multica/core/api";
+import type { Workspace } from "@multica/core/types";
 
 export function WorkspaceTab() {
   const user = useAuthStore((s) => s.user);
   const workspace = useWorkspaceStore((s) => s.workspace);
   const wsId = useWorkspaceId();
   const { data: members = [] } = useQuery(memberListOptions(wsId));
+  const qc = useQueryClient();
   const updateWorkspace = useWorkspaceStore((s) => s.updateWorkspace);
   const leaveWorkspace = useLeaveWorkspace();
   const deleteWorkspace = useDeleteWorkspace();
@@ -67,6 +69,9 @@ export function WorkspaceTab() {
         context,
       });
       updateWorkspace(updated);
+      qc.setQueryData(workspaceKeys.list(), (old: Workspace[] | undefined) =>
+        old?.map((ws) => (ws.id === updated.id ? updated : ws)),
+      );
       toast.success("Workspace settings saved");
     } catch (e) {
       toast.error(e instanceof Error ? e.message : "Failed to save workspace settings");