refactor(core): remove platform coupling — StorageAdapter, sonner, barrel cleanup

P0: Replace all localStorage calls in packages/core with StorageAdapter
- Create StorageAdapter interface (getItem/setItem/removeItem)
- Auth store factory now requires storage parameter
- Workspace store factory accepts optional storage parameter
- WSProvider accepts storage prop for token retrieval
- apps/web/platform/ passes localStorage as the web implementation

P1: Remove sonner UI dependency from packages/core
- Replace toast.error() in workspace store with onError callback
- Move sonner import to apps/web/platform/workspace.ts
- Remove sonner from packages/core/package.json dependencies

P2: Delete 5 pure re-export barrel files in apps/web/features/
- features/issues/index.ts, modals/index.ts, navigation/index.ts,
  workspace/index.ts, inbox/index.ts — all had zero consumers
- features/ now only contains auth/ (web-only cookie + initializer)
  and landing/ (web-only pages)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/features/inbox/index.ts

@@ -1,13 +0,0 @@
-// Inbox server state is managed by TanStack Query.
-// See core/inbox/ for queries, mutations, and WS updaters.
-export {
-  inboxKeys,
-  inboxListOptions,
-  deduplicateInboxItems,
-  useMarkInboxRead,
-  useArchiveInbox,
-  useMarkAllInboxRead,
-  useArchiveAllInbox,
-  useArchiveAllReadInbox,
-  useArchiveCompletedInbox,
-} from "@multica/core/inbox";

apps/web/features/issues/index.ts

@@ -1,5 +0,0 @@
-export { useIssueStore } from "@multica/core/issues";
-export { useIssueViewStore, createIssueViewStore } from "@multica/core/issues/stores/view-store";
-export { ViewStoreProvider, useViewStore } from "@multica/core/issues/stores/view-store-context";
-export { StatusIcon, PriorityIcon, StatusPicker, PriorityPicker, AssigneePicker } from "@multica/views/issues/components";
-export * from "@multica/core/issues/config";

apps/web/features/modals/index.ts

@@ -1,2 +0,0 @@
-export { useModalStore } from "@multica/core/modals";
-export { ModalRegistry } from "@multica/views/modals/registry";

apps/web/features/navigation/index.ts

@@ -1 +0,0 @@
-export { useNavigationStore } from "@multica/core/navigation";

apps/web/features/workspace/index.ts

@@ -1,3 +0,0 @@
-export { useWorkspaceStore } from "@/platform/workspace";
-export { useActorName } from "@multica/core/workspace/hooks";
-export { WorkspaceAvatar } from "@multica/views/workspace/workspace-avatar";

apps/web/platform/auth.ts

@@ -7,6 +7,7 @@ import {
 
 export const useAuthStore = createAuthStore({
   api,
+  storage: localStorage,
   onLogin: setLoggedInCookie,
   onLogout: clearLoggedInCookie,
 });

apps/web/platform/workspace.ts

@@ -1,6 +1,10 @@
 import { createWorkspaceStore, registerWorkspaceStore } from "@multica/core/workspace";
+import { toast } from "sonner";
 import { api } from "./api";
 
-export const useWorkspaceStore = createWorkspaceStore(api);
+export const useWorkspaceStore = createWorkspaceStore(api, {
+  storage: localStorage,
+  onError: (msg) => toast.error(msg),
+});
 
 registerWorkspaceStore(useWorkspaceStore);

apps/web/platform/ws-provider.tsx

@@ -13,6 +13,7 @@ export function WebWSProvider({ children }: { children: React.ReactNode }) {
       wsUrl={WS_URL}
       authStore={useAuthStore}
       workspaceStore={useWorkspaceStore}
+      storage={localStorage}
       onToast={(message, type) => {
         if (type === "error") toast.error(message);
         else toast.info(message);

packages/core/auth/store.ts

@@ -1,9 +1,10 @@
 import { create } from "zustand";
-import type { User } from "../types";
+import type { User, StorageAdapter } from "../types";
 import type { ApiClient } from "../api/client";
 
 export interface AuthStoreOptions {
   api: ApiClient;
+  storage: StorageAdapter;
   onLogin?: () => void;
   onLogout?: () => void;
 }
@@ -21,14 +22,14 @@ export interface AuthState {
 }
 
 export function createAuthStore(options: AuthStoreOptions) {
-  const { api, onLogin, onLogout } = options;
+  const { api, storage, onLogin, onLogout } = options;
 
   return create<AuthState>((set) => ({
     user: null,
     isLoading: true,
 
     initialize: async () => {
-      const token = localStorage.getItem("multica_token");
+      const token = storage.getItem("multica_token");
       if (!token) {
         set({ isLoading: false });
         return;
@@ -42,7 +43,7 @@ export function createAuthStore(options: AuthStoreOptions) {
       } catch {
         api.setToken(null);
         api.setWorkspaceId(null);
-        localStorage.removeItem("multica_token");
+        storage.removeItem("multica_token");
         set({ user: null, isLoading: false });
       }
     },
@@ -53,7 +54,7 @@ export function createAuthStore(options: AuthStoreOptions) {
 
     verifyCode: async (email: string, code: string) => {
       const { token, user } = await api.verifyCode(email, code);
-      localStorage.setItem("multica_token", token);
+      storage.setItem("multica_token", token);
       api.setToken(token);
       onLogin?.();
       set({ user });
@@ -62,7 +63,7 @@ export function createAuthStore(options: AuthStoreOptions) {
 
     loginWithGoogle: async (code: string, redirectUri: string) => {
       const { token, user } = await api.googleLogin(code, redirectUri);
-      localStorage.setItem("multica_token", token);
+      storage.setItem("multica_token", token);
       api.setToken(token);
       onLogin?.();
       set({ user });
@@ -70,7 +71,7 @@ export function createAuthStore(options: AuthStoreOptions) {
     },
 
     logout: () => {
-      localStorage.removeItem("multica_token");
+      storage.removeItem("multica_token");
       api.setToken(null);
       api.setWorkspaceId(null);
       onLogout?.();

packages/core/package.json

@@ -45,8 +45,7 @@
   "dependencies": {
     "@tanstack/react-query": "catalog:",
     "@tanstack/react-query-devtools": "^5.96.2",
-    "zustand": "catalog:",
-    "sonner": "^2.0.0"
+    "zustand": "catalog:"
   },
   "peerDependencies": {
     "react": "catalog:"

packages/core/realtime/provider.tsx

@@ -10,7 +10,7 @@ import {
   type ReactNode,
 } from "react";
 import { WSClient } from "../api/ws-client";
-import type { WSEventType } from "../types";
+import type { WSEventType, StorageAdapter } from "../types";
 import type { StoreApi, UseBoundStore } from "zustand";
 import type { AuthState } from "../auth/store";
 import type { WorkspaceStore } from "../workspace/store";
@@ -34,6 +34,8 @@ export interface WSProviderProps {
   authStore: UseBoundStore<StoreApi<AuthState>>;
   /** Platform-created workspace store instance */
   workspaceStore: UseBoundStore<StoreApi<WorkspaceStore>>;
+  /** Platform-specific storage adapter for reading auth tokens */
+  storage: StorageAdapter;
   /** Optional callback for showing toast messages (platform-specific, e.g. sonner) */
   onToast?: (message: string, type?: "info" | "error") => void;
 }
@@ -43,6 +45,7 @@ export function WSProvider({
   wsUrl,
   authStore,
   workspaceStore,
+  storage,
   onToast,
 }: WSProviderProps) {
   const user = authStore((s) => s.user);
@@ -53,7 +56,7 @@ export function WSProvider({
   useEffect(() => {
     if (!user || !workspace) return;
 
-    const token = localStorage.getItem("multica_token");
+    const token = storage.getItem("multica_token");
     if (!token) return;
 
     const ws = new WSClient(wsUrl, { logger: createLogger("ws") });
@@ -67,7 +70,7 @@ export function WSProvider({
       wsRef.current = null;
       setWsClient(null);
     };
-  }, [user, workspace, wsUrl]);
+  }, [user, workspace, wsUrl, storage]);
 
   const stores: RealtimeSyncStores = { authStore, workspaceStore };
 

packages/core/types/index.ts

@@ -29,3 +29,4 @@ export type { IssueSubscriber } from "./subscriber";
 export type * from "./events";
 export type * from "./api";
 export type { Attachment } from "./attachment";
+export type { StorageAdapter } from "./storage";

packages/core/types/storage.ts

@@ -0,0 +1,5 @@
+export interface StorageAdapter {
+  getItem(key: string): string | null;
+  setItem(key: string, value: string): void;
+  removeItem(key: string): void;
+}

packages/core/workspace/store.ts

@@ -1,11 +1,15 @@
 import { create } from "zustand";
-import { toast } from "sonner";
-import type { Workspace } from "../types";
+import type { Workspace, StorageAdapter } from "../types";
 import type { ApiClient } from "../api/client";
 import { createLogger } from "../logger";
 
 const logger = createLogger("workspace-store");
 
+interface WorkspaceStoreOptions {
+  storage?: StorageAdapter;
+  onError?: (message: string) => void;
+}
+
 interface WorkspaceState {
   workspace: Workspace | null;
   workspaces: Workspace[];
@@ -31,7 +35,10 @@ interface WorkspaceActions {
 
 export type WorkspaceStore = WorkspaceState & WorkspaceActions;
 
-export function createWorkspaceStore(api: ApiClient) {
+export function createWorkspaceStore(api: ApiClient, options?: WorkspaceStoreOptions) {
+  const storage = options?.storage;
+  const onError = options?.onError;
+
   return create<WorkspaceStore>((set, get) => ({
     // State
     workspace: null,
@@ -50,13 +57,13 @@ export function createWorkspaceStore(api: ApiClient) {
 
       if (!nextWorkspace) {
         api.setWorkspaceId(null);
-        localStorage.removeItem("multica_workspace_id");
+        storage?.removeItem("multica_workspace_id");
         set({ workspace: null });
         return null;
       }
 
       api.setWorkspaceId(nextWorkspace.id);
-      localStorage.setItem("multica_workspace_id", nextWorkspace.id);
+      storage?.setItem("multica_workspace_id", nextWorkspace.id);
       set({ workspace: nextWorkspace });
       logger.debug("hydrate workspace", nextWorkspace.name, nextWorkspace.id);
 
@@ -73,7 +80,7 @@ export function createWorkspaceStore(api: ApiClient) {
       if (!ws) return;
 
       api.setWorkspaceId(ws.id);
-      localStorage.setItem("multica_workspace_id", ws.id);
+      storage?.setItem("multica_workspace_id", ws.id);
 
       // All data caches (issues, inbox, members, agents, skills, runtimes)
       // are managed by TanStack Query, keyed by wsId — auto-refetch on switch.
@@ -84,14 +91,14 @@ export function createWorkspaceStore(api: ApiClient) {
 
     refreshWorkspaces: async () => {
       const { workspace, hydrateWorkspace } = get();
-      const storedWorkspaceId = localStorage.getItem("multica_workspace_id");
+      const storedWorkspaceId = storage?.getItem("multica_workspace_id") ?? null;
       try {
         const wsList = await api.listWorkspaces();
         hydrateWorkspace(wsList, workspace?.id ?? storedWorkspaceId);
         return wsList;
       } catch (e) {
         logger.error("failed to refresh workspaces", e);
-        toast.error("Failed to refresh workspaces");
+        onError?.("Failed to refresh workspaces");
         return get().workspaces;
       }
     },