Feat: Cambios Varios 2

frontend/counter-panel/src/context/ToastContext.tsx

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+import React, { useState, useCallback } from 'react';
+import { AnimatePresence, motion } from 'framer-motion';
+import { CheckCircle2, AlertCircle, X, Info } from 'lucide-react';
+import { clsx } from 'clsx';
+import { ToastContext, type Toast, type ToastType } from './use-toast';
+
+export function ToastProvider({ children }: { children: React.ReactNode }) {
+  const [toasts, setToasts] = useState<Toast[]>([]);
+
+  const showToast = useCallback((message: string, type: ToastType) => {
+    const id = Math.random().toString(36).substring(2, 9);
+    setToasts((prev) => [...prev, { id, message, type }]);
+
+    setTimeout(() => {
+      setToasts((prev) => prev.filter((t) => t.id !== id));
+    }, 5000);
+  }, []);
+
+  const removeToast = (id: string) => {
+    setToasts((prev) => prev.filter((t) => t.id !== id));
+  };
+
+  return (
+    <ToastContext.Provider value={{ showToast }}>
+      {children}
+      <div className="fixed bottom-8 right-8 z-[1000] flex flex-col gap-3 pointer-events-none">
+        <AnimatePresence mode="popLayout">
+          {toasts.map((toast) => (
+            <motion.div
+              key={toast.id}
+              layout
+              initial={{ opacity: 0, x: 50, scale: 0.8 }}
+              animate={{ opacity: 1, x: 0, scale: 1 }}
+              exit={{ opacity: 0, x: 20, scale: 0.5, transition: { duration: 0.2 } }}
+              className={clsx(
+                "pointer-events-auto flex items-center gap-3 px-5 py-4 rounded-2xl shadow-2xl border backdrop-blur-md min-w-[300px] max-w-md",
+                toast.type === 'success' && "bg-emerald-50/90 border-emerald-100 text-emerald-900",
+                toast.type === 'error' && "bg-rose-50/90 border-rose-100 text-rose-900",
+                toast.type === 'info' && "bg-blue-50/90 border-blue-100 text-blue-900"
+              )}
+            >
+              <div className={clsx(
+                "p-2 rounded-xl",
+                toast.type === 'success' && "bg-emerald-500 text-white",
+                toast.type === 'error' && "bg-rose-500 text-white",
+                toast.type === 'info' && "bg-blue-500 text-white"
+              )}>
+                {toast.type === 'success' && <CheckCircle2 size={18} />}
+                {toast.type === 'error' && <AlertCircle size={18} />}
+                {toast.type === 'info' && <Info size={18} />}
+              </div>
+
+              <div className="flex-1">
+                <p className="text-sm font-black tracking-tight leading-tight">{toast.message}</p>
+              </div>
+
+              <button
+                onClick={() => removeToast(toast.id)}
+                className="p-1 hover:bg-black/5 rounded-lg transition-colors text-slate-400"
+              >
+                <X size={16} />
+              </button>
+            </motion.div>
+          ))}
+        </AnimatePresence>
+      </div>
+    </ToastContext.Provider>
+  );
+}

frontend/counter-panel/src/context/use-toast.ts

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+import { createContext, useContext } from 'react';
+
+export type ToastType = 'success' | 'error' | 'info';
+
+export interface Toast {
+  id: string;
+  message: string;
+  type: ToastType;
+}
+
+export interface ToastContextType {
+  showToast: (message: string, type: ToastType) => void;
+}
+
+export const ToastContext = createContext<ToastContextType | undefined>(undefined);
+
+export const useToast = () => {
+  const context = useContext(ToastContext);
+  if (!context) throw new Error('useToast must be used within ToastProvider');
+  return context;
+};