feat: implement user authentication and logout functionality

- Added login/logout buttons to the HomeScreen and SettingsScreen.
- Integrated authentication state management using Zustand and cookies.
- Updated API to support username and password for login.
- Enhanced PlayScreen to handle video playback based on user authentication.
- Created a new detailStore to manage video details and sources.
- Refactored playerStore to utilize detailStore for episode management.
- Added sourceStore to manage video source toggling.
- Updated settingsStore to fetch server configuration.
- Improved error handling and user feedback with Toast notifications.
- Cleaned up unused code and optimized imports across components.

stores/authStore.ts

@@ -1,15 +1,42 @@
 import { create } from "zustand";
+import Cookies from "@react-native-cookies/cookies";
+import { api } from "@/services/api";
 
 interface AuthState {
+  isLoggedIn: boolean;
   isLoginModalVisible: boolean;
   showLoginModal: () => void;
   hideLoginModal: () => void;
+  checkLoginStatus: () => Promise<void>;
+  logout: () => Promise<void>;
 }
 
 const useAuthStore = create<AuthState>((set) => ({
+  isLoggedIn: false,
   isLoginModalVisible: false,
   showLoginModal: () => set({ isLoginModalVisible: true }),
   hideLoginModal: () => set({ isLoginModalVisible: false }),
+  checkLoginStatus: async () => {
+    try {
+      const cookies = await Cookies.get(api.baseURL);
+      const isLoggedIn = cookies && !!cookies.auth;
+      set({ isLoggedIn });
+      if (!isLoggedIn) {
+        set({ isLoginModalVisible: true });
+      }
+    } catch (error) {
+      console.error("Failed to check login status:", error);
+      set({ isLoggedIn: false, isLoginModalVisible: true });
+    }
+  },
+  logout: async () => {
+    try {
+      await Cookies.clearAll();
+      set({ isLoggedIn: false, isLoginModalVisible: true });
+    } catch (error) {
+      console.error("Failed to logout:", error);
+    }
+  },
 }));
 
 export default useAuthStore;