feat: integrate Better Auth and enhance authentication flow

- Added Better Auth integration to the web application, allowing for dual login support with both custom and Better Auth systems.
- Updated authentication client configuration to dynamically set the base URL based on the environment.
- Enhanced chat components to utilize user authentication status, improving user experience and security.
- Refactored various components to support Better Auth, including error handling and user identity management.
- Improved notification handling and user feedback mechanisms during authentication processes.

apps/web/src/lib/stores/convexAuth.ts

@@ -0,0 +1,64 @@
+/**
+ * Helper para garantir que o token seja passado para todas requisições Convex
+ * 
+ * Este store reativa garante que quando o token mudar no authStore,
+ * todos os clientes Convex sejam atualizados automaticamente.
+ */
+
+import { authStore } from "./auth.svelte";
+import { browser } from "$app/environment";
+import { PUBLIC_CONVEX_URL } from "$env/static/public";
+
+let convexClients = new Set<any>();
+
+/**
+ * Registrar um cliente Convex para receber atualizações de token
+ */
+export function registerConvexClient(client: any) {
+  if (!browser) return;
+  
+  convexClients.add(client);
+  
+  // Configurar token inicial
+  if (authStore.token && client.setAuth) {
+    client.setAuth(authStore.token);
+  }
+  
+  // Retornar função de limpeza
+  return () => {
+    convexClients.delete(client);
+  };
+}
+
+/**
+ * Atualizar token em todos clientes registrados
+ */
+function updateAllClients() {
+  if (!browser) return;
+  
+  const token = authStore.token;
+  convexClients.forEach((client) => {
+    if (client && typeof client.setAuth === "function") {
+      if (token) {
+        client.setAuth(token);
+      } else {
+        client.clearAuth?.();
+      }
+    }
+  });
+}
+
+// Observar mudanças no token e atualizar clientes
+if (browser) {
+  // Usar uma abordagem reativa simples
+  let lastToken: string | null = null;
+  
+  setInterval(() => {
+    const currentToken = authStore.token;
+    if (currentToken !== lastToken) {
+      lastToken = currentToken;
+      updateAllClients();
+    }
+  }, 500); // Verificar a cada 500ms
+}
+