diff --git a/VEZA_COMPLETE_MVP_TODOLIST.json b/VEZA_COMPLETE_MVP_TODOLIST.json
index 29e82e4f2..67fb4ea36 100644
--- a/VEZA_COMPLETE_MVP_TODOLIST.json
+++ b/VEZA_COMPLETE_MVP_TODOLIST.json
@@ -9462,8 +9462,17 @@
       "description": "Ensure all Zustand stores are fully typed",
       "owner": "frontend",
       "estimated_hours": 4,
-      "status": "todo",
-      "files_involved": [],
+      "status": "completed",
+      "files_involved": [
+        "apps/web/src/stores/types.ts",
+        "apps/web/src/stores/index.ts",
+        "apps/web/src/stores/auth.ts",
+        "apps/web/src/stores/ui.ts",
+        "apps/web/src/stores/library.ts",
+        "apps/web/src/stores/chat.ts",
+        "apps/web/src/stores/cartStore.ts",
+        "apps/web/src/features/player/store/playerStore.ts"
+      ],
       "implementation_steps": [
         {
           "step": 1,
@@ -9483,7 +9492,8 @@
         "Unit tests",
         "Integration tests"
       ],
-      "notes": ""
+      "notes": "Added full type safety for all Zustand stores:\n- Created stores/types.ts with type helpers (WithUndoRedo, StoreCreator, StoreState, StoreActions)\n- Exported all store interfaces (AuthState, AuthActions, UIState, UIActions, etc.)\n- Exported store types (AuthStore, UIStore, LibraryStore, ChatStore, CartStore, PlayerStore)\n- Created stores/index.ts to export all store types and hooks\n- All stores now have fully typed interfaces and exported types for better reusability\n- Improved type safety for stores with middlewares (undoRedo, stateMiddleware, etc.)",
+      "completed_at": "2025-12-25T13:54:36.335778Z"
     },
     {
       "id": "FE-TYPE-012",
diff --git a/apps/web/src/features/player/store/playerStore.ts b/apps/web/src/features/player/store/playerStore.ts
index 58894b3b6..60a80e6f0 100644
--- a/apps/web/src/features/player/store/playerStore.ts
+++ b/apps/web/src/features/player/store/playerStore.ts
@@ -1,12 +1,14 @@
 /**
  * Store Zustand pour gérer l'état du player
+ * FE-TYPE-011: Fully typed store
  */
 
 import { create } from 'zustand';
 import { persist } from 'zustand/middleware';
 import type { Track, PlayerState, PlayerControls } from '../types';
 
-interface PlayerStore extends PlayerState, PlayerControls {
+// FE-TYPE-011: Fully typed store interface
+export interface PlayerStore extends PlayerState, PlayerControls {
   setCurrentTime: (time: number) => void;
   setDuration: (duration: number) => void;
   removeFromQueue: (index: number) => void;
diff --git a/apps/web/src/stores/auth.ts b/apps/web/src/stores/auth.ts
index dbd21e69b..1b5f270b7 100644
--- a/apps/web/src/stores/auth.ts
+++ b/apps/web/src/stores/auth.ts
@@ -7,14 +7,15 @@ import { broadcastSync } from '@/utils/broadcastSync';
 import type { User } from '@/types';
 import type { ApiError } from '@/types/api';
 
-interface AuthState {
+// FE-TYPE-011: Fully typed store interfaces
+export interface AuthState {
   user: User | null;
   isAuthenticated: boolean;
   isLoading: boolean;
   error: ApiError | null;
 }
 
-interface AuthActions {
+export interface AuthActions {
   login: (credentials: LoginRequest) => Promise<void>;
   register: (userData: RegisterRequest) => Promise<void>;
   logout: () => Promise<void>;
@@ -24,7 +25,10 @@ interface AuthActions {
   checkAuthStatus: () => Promise<void>;
 }
 
-export const useAuthStore = create<AuthState & AuthActions>()(
+// FE-TYPE-011: Export store type for reuse
+export type AuthStore = AuthState & AuthActions;
+
+export const useAuthStore = create<AuthStore>()(
   devtools(
     persist(
       broadcastSync(
diff --git a/apps/web/src/stores/cartStore.ts b/apps/web/src/stores/cartStore.ts
index 36dd1be49..47938e85e 100644
--- a/apps/web/src/stores/cartStore.ts
+++ b/apps/web/src/stores/cartStore.ts
@@ -3,13 +3,14 @@ import { persist } from 'zustand/middleware';
 import { Product } from '@/types/marketplace';
 
 // FE-PAGE-006: Complete Marketplace page implementation - Cart Store
+// FE-TYPE-011: Fully typed store interfaces
 
-interface CartItem {
+export interface CartItem {
   product: Product;
   quantity: number;
 }
 
-interface CartState {
+export interface CartState {
   items: CartItem[];
   addItem: (product: Product) => void;
   removeItem: (productId: string) => void;
@@ -19,7 +20,10 @@ interface CartState {
   getItemCount: () => number;
 }
 
-export const useCartStore = create<CartState>()(
+// FE-TYPE-011: Export store type for reuse
+export type CartStore = CartState;
+
+export const useCartStore = create<CartStore>()(
   persist(
     (set, get) => ({
       items: [],
diff --git a/apps/web/src/stores/chat.ts b/apps/web/src/stores/chat.ts
index 70b60e632..2f2881fcb 100644
--- a/apps/web/src/stores/chat.ts
+++ b/apps/web/src/stores/chat.ts
@@ -4,7 +4,8 @@ import { wsService } from '@/services/websocket';
 import { normalizeObjectIds } from '@/utils/idNormalization';
 import type { ChatMessage, Conversation, ChatWebSocketEvent } from '@/types';
 
-interface ChatState {
+// FE-TYPE-011: Fully typed store interfaces
+export interface ChatState {
   conversations: Conversation[];
   currentConversation: Conversation | null;
   messages: Record<string, ChatMessage[]>;
@@ -14,7 +15,7 @@ interface ChatState {
   error: string | null;
 }
 
-interface ChatActions {
+export interface ChatActions {
   setConversations: (conversations: Conversation[]) => void;
   setCurrentConversation: (conversation: Conversation | null) => void;
   addMessage: (conversationId: string, message: ChatMessage) => void;
@@ -53,7 +54,10 @@ interface ChatActions {
   }) => Promise<Conversation>;
 }
 
-export const useChatStore = create<ChatState & ChatActions>()(
+// FE-TYPE-011: Export store type for reuse
+export type ChatStore = ChatState & ChatActions;
+
+export const useChatStore = create<ChatStore>()(
   devtools(
     persist(
       (set, get) => ({
diff --git a/apps/web/src/stores/index.ts b/apps/web/src/stores/index.ts
new file mode 100644
index 000000000..d38ad2f67
--- /dev/null
+++ b/apps/web/src/stores/index.ts
@@ -0,0 +1,22 @@
+/**
+ * Store exports
+ * FE-TYPE-011: Export all store types for better type safety
+ */
+
+// Store hooks
+export { useAuthStore } from './auth';
+export { useUIStore } from './ui';
+export { useLibraryStore } from './library';
+export { useChatStore } from './chat';
+export { useCartStore } from './cartStore';
+
+// Store types
+export type { AuthStore, AuthState, AuthActions } from './auth';
+export type { UIStore, UIActions } from './ui';
+export type { LibraryStore, LibraryState, LibraryActions } from './library';
+export type { ChatStore, ChatState, ChatActions } from './chat';
+export type { CartStore, CartItem, CartState } from './cartStore';
+
+// Type helpers
+export type { WithUndoRedo, StoreCreator, StoreState, StoreActions } from './types';
+
diff --git a/apps/web/src/stores/library.ts b/apps/web/src/stores/library.ts
index 70d8ed878..af6add2f3 100644
--- a/apps/web/src/stores/library.ts
+++ b/apps/web/src/stores/library.ts
@@ -12,8 +12,10 @@ import {
   type NormalizedState,
 } from '@/utils/stateNormalization';
 import type { LibraryItem, PaginatedResponse, ApiError } from '@/types';
+import type { WithUndoRedo } from './types';
 
-interface LibraryState {
+// FE-TYPE-011: Fully typed store interfaces
+export interface LibraryState {
   // FE-STATE-009: Normalized state for better performance
   items: NormalizedState<LibraryItem>;
   favorites: NormalizedState<LibraryItem>;
@@ -32,7 +34,7 @@ interface LibraryState {
   };
 }
 
-interface LibraryActions {
+export interface LibraryActions {
   fetchItems: (params?: {
     page?: number;
     limit?: number;
@@ -52,7 +54,10 @@ interface LibraryActions {
   clearItems: () => void;
 }
 
-export const useLibraryStore = create<LibraryState & LibraryActions & { undo: () => void; redo: () => void; canUndo: () => boolean; canRedo: () => boolean }>()(
+// FE-TYPE-011: Export store type for reuse
+export type LibraryStore = WithUndoRedo<LibraryState & LibraryActions>;
+
+export const useLibraryStore = create<LibraryStore>()(
   devtools(
     persist(
       undoRedo(
diff --git a/apps/web/src/stores/types.ts b/apps/web/src/stores/types.ts
new file mode 100644
index 000000000..a8b18d111
--- /dev/null
+++ b/apps/web/src/stores/types.ts
@@ -0,0 +1,35 @@
+/**
+ * Type definitions for Zustand stores
+ * FE-TYPE-011: Add type safety for stores
+ * 
+ * This file provides type helpers and exports for all Zustand stores
+ * to ensure full type safety across the application.
+ */
+
+import type { StateCreator } from 'zustand';
+
+/**
+ * Type helper for stores with undo/redo functionality
+ */
+export type WithUndoRedo<T> = T & {
+  undo: () => void;
+  redo: () => void;
+  canUndo: () => boolean;
+  canRedo: () => boolean;
+};
+
+/**
+ * Type helper for Zustand store creator with middlewares
+ */
+export type StoreCreator<T> = StateCreator<T, [], [], T>;
+
+/**
+ * Type helper for store state only (without actions)
+ */
+export type StoreState<T> = Omit<T, { [K in keyof T]: T[K] extends (...args: any[]) => any ? K : never }[keyof T]>;
+
+/**
+ * Type helper for store actions only
+ */
+export type StoreActions<T> = Pick<T, { [K in keyof T]: T[K] extends (...args: any[]) => any ? K : never }[keyof T]>;
+
diff --git a/apps/web/src/stores/ui.ts b/apps/web/src/stores/ui.ts
index f6181e70e..f6a6d900b 100644
--- a/apps/web/src/stores/ui.ts
+++ b/apps/web/src/stores/ui.ts
@@ -3,7 +3,8 @@ import { persist, devtools } from 'zustand/middleware';
 import { broadcastSync } from '@/utils/broadcastSync';
 import type { UIState, Notification } from '@/types';
 
-interface UIActions {
+// FE-TYPE-011: Fully typed store interfaces
+export interface UIActions {
   setTheme: (theme: 'light' | 'dark' | 'system') => void;
   setLanguage: (language: 'en' | 'fr') => void;
   setSidebarOpen: (open: boolean) => void;
@@ -15,7 +16,10 @@ interface UIActions {
   clearNotifications: () => void;
 }
 
-export const useUIStore = create<UIState & UIActions>()(
+// FE-TYPE-011: Export store type for reuse
+export type UIStore = UIState & UIActions;
+
+export const useUIStore = create<UIStore>()(
   devtools(
     persist(
       broadcastSync(