Add jefe mecánico to client booking flow

Cliente now picks a jefe mecánico after choosing the service so the
calendar shows that specific jefe's availability. Each jefe has its own
configurable parallel slot capacity (replacing the global SLOTS_PARALELOS
= 5). Admins manage jefes from /admin/jefes; jefes log in to /jefe to
see their daily agenda.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/middleware.ts

@@ -28,14 +28,20 @@ export async function middleware(req: NextRequest) {
       pathname.startsWith("/admin/turnos") ||
       pathname.startsWith("/admin/historial") ||
       pathname.startsWith("/admin/servicios") ||
+      pathname.startsWith("/admin/jefes") ||
       pathname.startsWith("/admin/clientes")) {
     const ok = await verifyCookie(req, "admin_session");
     if (!ok) return NextResponse.redirect(new URL("/admin", req.url));
   }
 
+  if (pathname.startsWith("/jefe/dashboard")) {
+    const ok = await verifyCookie(req, "jefe_session");
+    if (!ok) return NextResponse.redirect(new URL("/jefe", req.url));
+  }
+
   return NextResponse.next();
 }
 
 export const config = {
-  matcher: ["/cliente/:path*", "/admin/:path*"],
+  matcher: ["/cliente/:path*", "/admin/:path*", "/jefe/:path*"],
 };