feat: implement customizable funnel stages per tenant

- Modified attendances.funnel_stage in DB from ENUM to VARCHAR.

- Created tenant_funnels table and backend API routes to manage custom stages.

- Added /admin/funnels page for Admins/Managers to create, edit, order, and color-code their funnel stages.

- Updated Dashboard, UserDetail, and AttendanceDetail to fetch and render dynamic funnel stages instead of hardcoded enums.

- Added defensive checks and logging to GET /users/:idOrSlug to fix sporadic 500 errors during impersonation handoffs.

services/dataService.ts

@@ -82,6 +82,60 @@ export const clearAllNotifications = async (): Promise<boolean> => {
   }
 };
 
+// --- Funnels Functions ---
+export const getFunnels = async (tenantId: string): Promise<any[]> => {
+  try {
+    const response = await fetch(`${API_URL}/funnels?tenantId=${tenantId}`, {
+      headers: getHeaders()
+    });
+    if (!response.ok) throw new Error('Falha ao buscar funis');
+    return await response.json();
+  } catch (error) {
+    console.error("API Error (getFunnels):", error);
+    return [];
+  }
+};
+
+export const createFunnel = async (data: any): Promise<any> => {
+  const response = await fetch(`${API_URL}/funnels`, {
+    method: 'POST',
+    headers: getHeaders(),
+    body: JSON.stringify(data)
+  });
+  if (!response.ok) {
+    const error = await response.json();
+    throw new Error(error.error || 'Erro ao criar funil');
+  }
+  return await response.json();
+};
+
+export const updateFunnel = async (id: string, data: any): Promise<boolean> => {
+  try {
+    const response = await fetch(`${API_URL}/funnels/${id}`, {
+      method: 'PUT',
+      headers: getHeaders(),
+      body: JSON.stringify(data)
+    });
+    return response.ok;
+  } catch (error) {
+    console.error("API Error (updateFunnel):", error);
+    return false;
+  }
+};
+
+export const deleteFunnel = async (id: string): Promise<boolean> => {
+  try {
+    const response = await fetch(`${API_URL}/funnels/${id}`, {
+      method: 'DELETE',
+      headers: getHeaders()
+    });
+    return response.ok;
+  } catch (error) {
+    console.error("API Error (deleteFunnel):", error);
+    return false;
+  }
+};
+
 export const searchGlobal = async (query: string): Promise<{ members: User[], teams: any[], attendances: any[], organizations?: any[] }> => {
   try {
     const response = await fetch(`${API_URL}/search?q=${encodeURIComponent(query)}`, {