feat: initial commit with seeded database and premium ui changes

frontend/lib/auth-context.tsx

@@ -0,0 +1,73 @@
+"use client";
+
+import React, {
+  createContext,
+  useContext,
+  useState,
+  useEffect,
+  useCallback,
+} from "react";
+import type { AuthUser, AuthState } from "@/lib/auth-types";
+
+interface AuthContextValue extends AuthState {
+  login: (token: string, user: AuthUser) => void;
+  logout: () => void;
+}
+
+const AuthContext = createContext<AuthContextValue | null>(null);
+
+const TOKEN_KEY = "auth_token";
+const USER_KEY = "auth_user";
+
+export function AuthProvider({ children }: { children: React.ReactNode }) {
+  const [state, setState] = useState<AuthState>({
+    user: null,
+    token: null,
+    isLoading: true,
+  });
+
+  useEffect(() => {
+    const token = localStorage.getItem(TOKEN_KEY);
+    const userRaw = localStorage.getItem(USER_KEY);
+    if (token && userRaw) {
+      try {
+        const user = JSON.parse(userRaw) as AuthUser;
+        setState({ user, token, isLoading: false });
+      } catch {
+        localStorage.removeItem(TOKEN_KEY);
+        localStorage.removeItem(USER_KEY);
+        setState({ user: null, token: null, isLoading: false });
+      }
+    } else {
+      setState((s) => ({ ...s, isLoading: false }));
+    }
+  }, []);
+
+  const login = useCallback((token: string, user: AuthUser) => {
+    localStorage.setItem(TOKEN_KEY, token);
+    localStorage.setItem(USER_KEY, JSON.stringify(user));
+    // Also set a cookie so proxy.ts (Next.js 16) can read it for route gating
+    document.cookie = `auth_token=${token}; path=/; SameSite=Strict; max-age=28800`;
+    setState({ user, token, isLoading: false });
+  }, []);
+
+  const logout = useCallback(() => {
+    localStorage.removeItem(TOKEN_KEY);
+    localStorage.removeItem(USER_KEY);
+    document.cookie = "auth_token=; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT";
+    setState({ user: null, token: null, isLoading: false });
+    window.location.href = "/auth/login";
+  }, []);
+
+  return (
+    <AuthContext.Provider value={{ ...state, login, logout }}>
+      {children}
+    </AuthContext.Provider>
+  );
+}
+
+export function useAuth(): AuthContextValue {
+  const ctx = useContext(AuthContext);
+  if (!ctx) throw new Error("useAuth must be used inside AuthProvider");
+  return ctx;
+}