Replace hand-rolled shell with shadcn sidebar + breadcrumb header

AppSidebar (icon-collapsible, sync warning badge, brand header),
NavUser footer (avatar + privacy/theme/logout dropdown), and a thin
header with SidebarTrigger, breadcrumbs, and quick toggles. Mobile
drawer and cmd+B come from the sidebar primitives.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/components/Layout.tsx

@@ -1,239 +1,100 @@
-import { useState, useEffect } from "react";
-import { Link, Outlet, useLocation, useNavigate } from "react-router-dom";
-import {
-  Sparkles,
-  Telescope,
-  Calculator,
-  BarChart3,
-  Landmark,
-  PiggyBank,
-  Droplets,
-  Layers,
-  LogOut,
-  TrendingUp,
-  Wallet,
-  Menu,
-  RefreshCw,
-  Sun,
-  Moon,
-  Eye,
-  EyeOff,
-  type LucideIcon,
-} from "lucide-react";
-import { useQuery } from "@tanstack/react-query";
+import { Link, Outlet, useLocation } from "react-router-dom";
+import { Eye, EyeOff, Moon, Sun } from "lucide-react";
 
-import { getSyncStatus } from "@/lib/api";
+import { titleFor } from "@/lib/navigation";
 import { useTheme } from "@/contexts/theme-context";
 import { usePrivacy } from "@/contexts/privacy-context";
-import { useAuth } from "@/AuthContext";
+import { AppSidebar } from "@/components/app-sidebar";
 import { Button } from "@/components/ui/button";
 import {
-  Sheet,
-  SheetContent,
-  SheetHeader,
-  SheetTitle,
-  SheetClose,
-} from "@/components/ui/sheet";
+  Breadcrumb,
+  BreadcrumbItem,
+  BreadcrumbLink,
+  BreadcrumbList,
+  BreadcrumbPage,
+  BreadcrumbSeparator,
+} from "@/components/ui/breadcrumb";
 import { Separator } from "@/components/ui/separator";
-import { cn } from "@/lib/utils";
-
-interface NavSection {
-  label: string;
-  items: { to: string; icon: LucideIcon; label: string }[];
-}
-
-const navSections: NavSection[] = [
-  {
-    label: "General",
-    items: [
-      { to: "/asistente", icon: Sparkles, label: "Asistente" },
-      { to: "/sync", icon: RefreshCw, label: "Sincronización" },
-    ],
-  },
-  {
-    label: "Finanzas",
-    items: [
-      { to: "/budget", icon: Calculator, label: "Presupuesto" },
-      { to: "/salarios", icon: Landmark, label: "Salarios" },
-      { to: "/financiamientos", icon: Layers, label: "Financiamientos" },
-      { to: "/pensions", icon: PiggyBank, label: "Pensiones" },
-      { to: "/proyecciones", icon: TrendingUp, label: "Proyecciones" },
-      { to: "/planificador", icon: Telescope, label: "Planificador" },
-      { to: "/analytics", icon: BarChart3, label: "Analytics" },
-    ],
-  },
-  {
-    label: "Servicios",
-    items: [
-      { to: "/servicios-municipales", icon: Droplets, label: "Municipalidad" },
-    ],
-  },
-];
-
-function SidebarNav({ onNavigate }: { onNavigate?: () => void }) {
-  const { pathname } = useLocation();
-  const isActive = (to: string) =>
-    pathname === to || pathname.startsWith(`${to}/`);
-
-  // Surface stalled ingestion sources as a dot on the Sincronización item.
-  const syncQ = useQuery({
-    queryKey: ['sync-status'],
-    queryFn: () => getSyncStatus().then((r) => r.data),
-    staleTime: 5 * 60_000,
-  });
-  const syncWarnings = syncQ.data?.warnings ?? 0;
-
-  return (
-    <nav className="flex flex-col gap-0.5 px-3">
-      {navSections.map((section) => (
-        <div key={section.label}>
-          <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider px-3 pt-4 pb-1">
-            {section.label}
-          </p>
-          {section.items.map(({ to, icon: Icon, label }) => (
-            <Link
-              key={to}
-              to={to}
-              onClick={onNavigate}
-              className={cn(
-                "flex items-center gap-3 px-3 py-2 rounded-lg text-sm font-medium transition-colors",
-                isActive(to)
-                  ? "bg-primary/10 text-primary"
-                  : "text-muted-foreground hover:text-foreground hover:bg-muted",
-              )}
-            >
-              <Icon className="w-4 h-4" />
-              {label}
-              {to === "/sync" && syncWarnings > 0 && (
-                <span
-                  className="ml-auto w-2 h-2 rounded-full bg-amber-500"
-                  title={`${syncWarnings} fuente(s) atrasada(s)`}
-                  aria-label={`${syncWarnings} fuentes de datos atrasadas`}
-                />
-              )}
-            </Link>
-          ))}
-        </div>
-      ))}
-    </nav>
-  );
-}
+import {
+  SidebarInset,
+  SidebarProvider,
+  SidebarTrigger,
+} from "@/components/ui/sidebar";
 
 export default function Layout() {
   const { theme, toggleTheme } = useTheme();
   const { privacyMode, togglePrivacy } = usePrivacy();
-  const { logout } = useAuth();
-  const navigate = useNavigate();
-  const [mobileOpen, setMobileOpen] = useState(false);
-
-  const handleLogout = async () => {
-    await logout();
-    navigate("/login", { replace: true });
-  };
+  const { pathname } = useLocation();
+  const title = titleFor(pathname);
 
   return (
-    <div className="min-h-screen bg-background text-foreground">
-      <header className="border-b border-border backdrop-blur-sm sticky top-0 z-50 bg-background/90">
-        <div className="px-4 sm:px-6 py-3 flex items-center justify-between">
-          <div className="flex items-center gap-2.5">
+    <SidebarProvider>
+      <AppSidebar />
+      <SidebarInset>
+        <header className="sticky top-0 z-40 flex h-14 shrink-0 items-center gap-2 border-b border-border bg-background/90 px-4 backdrop-blur-sm">
+          <SidebarTrigger className="-ml-1" />
+          <Separator
+            orientation="vertical"
+            className="mr-2 data-[orientation=vertical]:h-4"
+          />
+          <Breadcrumb>
+            <BreadcrumbList>
+              <BreadcrumbItem>
+                {pathname === "/" ? (
+                  <BreadcrumbPage>Inicio</BreadcrumbPage>
+                ) : (
+                  <BreadcrumbLink render={<Link to="/" />}>
+                    Inicio
+                  </BreadcrumbLink>
+                )}
+              </BreadcrumbItem>
+              {pathname !== "/" && (
+                <>
+                  <BreadcrumbSeparator />
+                  <BreadcrumbItem>
+                    <BreadcrumbPage>{title}</BreadcrumbPage>
+                  </BreadcrumbItem>
+                </>
+              )}
+            </BreadcrumbList>
+          </Breadcrumb>
+          <div className="ml-auto flex items-center gap-1">
             <Button
               variant="ghost"
               size="icon"
-              onClick={() => setMobileOpen(true)}
-              title="Open menu"
-              aria-label="Open menu"
-              className="md:hidden"
+              onClick={togglePrivacy}
+              title="Toggle privacy mode"
+              aria-label="Toggle privacy mode"
+              aria-pressed={privacyMode}
             >
-              <Menu className="w-5 h-5" />
-            </Button>
-            <div className="w-8 h-8 rounded-lg bg-primary flex items-center justify-center">
-              <Wallet className="w-4 h-4 text-primary-foreground" strokeWidth={2.5} />
-            </div>
-            <span className="text-lg font-bold tracking-tight hidden sm:inline" style={{ fontFamily: "var(--font-heading)" }}>
-              Wealthy<span className="text-primary">Smart</span>
-            </span>
-          </div>
-
-          <div className="flex items-center gap-1">
-            <Button variant="ghost" size="icon" onClick={togglePrivacy} title="Toggle privacy mode" aria-label="Toggle privacy mode" aria-pressed={privacyMode}>
-              {privacyMode ? <EyeOff className="w-4 h-4" /> : <Eye className="w-4 h-4" />}
-            </Button>
-            <Button variant="ghost" size="icon" onClick={toggleTheme} title="Toggle theme" aria-label="Toggle theme" aria-pressed={theme === "dark"}>
-              {theme === "dark" ? <Sun className="w-4 h-4" /> : <Moon className="w-4 h-4" />}
+              {privacyMode ? (
+                <EyeOff className="w-4 h-4" />
+              ) : (
+                <Eye className="w-4 h-4" />
+              )}
             </Button>
             <Button
               variant="ghost"
               size="icon"
-              onClick={handleLogout}
-              title="Sign out"
-              aria-label="Sign out"
-              className="hidden md:inline-flex"
+              onClick={toggleTheme}
+              title="Toggle theme"
+              aria-label="Toggle theme"
+              aria-pressed={theme === "dark"}
             >
-              <LogOut className="w-4 h-4" />
+              {theme === "dark" ? (
+                <Sun className="w-4 h-4" />
+              ) : (
+                <Moon className="w-4 h-4" />
+              )}
             </Button>
           </div>
-        </div>
         </header>
-
-      <div className="flex">
-        <aside className="hidden md:flex md:flex-col md:w-56 md:flex-shrink-0 border-r border-border sticky top-[57px] h-[calc(100vh-57px)] overflow-y-auto bg-background">
-          <div className="flex-1">
-            <SidebarNav />
-          </div>
-          <div className="px-3 pb-4">
-            <Separator className="mb-2" />
-            <button
-              onClick={handleLogout}
-              className="flex items-center gap-3 px-3 py-2 rounded-lg text-sm font-medium text-muted-foreground hover:text-foreground hover:bg-muted w-full cursor-pointer focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
-            >
-              <LogOut className="w-4 h-4" />
-              Cerrar sesión
-            </button>
-          </div>
-        </aside>
-
-        <Sheet open={mobileOpen} onOpenChange={setMobileOpen}>
-          <SheetContent side="left" className="p-0 w-64">
-            <SheetHeader className="p-4">
-              <SheetTitle className="flex items-center gap-2.5">
-                <div className="w-8 h-8 rounded-lg bg-primary flex items-center justify-center">
-                  <Wallet className="w-4 h-4 text-primary-foreground" strokeWidth={2.5} />
-                </div>
-                <span style={{ fontFamily: "var(--font-heading)" }}>
-                  Wealthy<span className="text-primary">Smart</span>
-                </span>
-              </SheetTitle>
-            </SheetHeader>
-            <Separator />
-            <div className="flex flex-col h-[calc(100%-65px)]">
-              <div className="flex-1 overflow-y-auto">
-                <SidebarNav onNavigate={() => setMobileOpen(false)} />
-              </div>
-              <div className="px-3 pb-4">
-                <Separator className="mb-2" />
-                <SheetClose render={<span />}>
-                  <button
-                    onClick={() => {
-                      setMobileOpen(false);
-                      void handleLogout();
-                    }}
-                    className="flex items-center gap-3 px-3 py-2 rounded-lg text-sm font-medium text-muted-foreground hover:text-foreground hover:bg-muted w-full cursor-pointer"
-                  >
-                    <LogOut className="w-4 h-4" />
-                    Cerrar sesión
-                  </button>
-                </SheetClose>
-              </div>
-            </div>
-          </SheetContent>
-        </Sheet>
-
-        <main className="flex-1 min-w-0 px-4 sm:px-6 lg:px-8 py-6">
-          <div className="max-w-6xl mx-auto">
+        <main className="flex min-h-0 flex-1 flex-col px-4 py-6 sm:px-6 lg:px-8">
+          <div className="mx-auto flex min-h-0 w-full max-w-6xl flex-1 flex-col">
             <Outlet />
           </div>
         </main>
-      </div>
-    </div>
+      </SidebarInset>
+    </SidebarProvider>
   );
 }

frontend/src/components/app-sidebar.tsx

@@ -0,0 +1,100 @@
+import { Wallet } from "lucide-react";
+import { Link, useLocation } from "react-router-dom";
+import { useQuery } from "@tanstack/react-query";
+
+import { getSyncStatus } from "@/lib/api";
+import { isNavActive, navSections } from "@/lib/navigation";
+import { NavUser } from "@/components/nav-user";
+import {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarGroup,
+  SidebarGroupContent,
+  SidebarGroupLabel,
+  SidebarHeader,
+  SidebarMenu,
+  SidebarMenuBadge,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  SidebarRail,
+  useSidebar,
+} from "@/components/ui/sidebar";
+
+export function AppSidebar(props: React.ComponentProps<typeof Sidebar>) {
+  const { pathname } = useLocation();
+  const { setOpenMobile } = useSidebar();
+
+  // Surface stalled ingestion sources as a dot on the Sincronización item.
+  const syncQ = useQuery({
+    queryKey: ["sync-status"],
+    queryFn: () => getSyncStatus().then((r) => r.data),
+    staleTime: 5 * 60_000,
+  });
+  const syncWarnings = syncQ.data?.warnings ?? 0;
+
+  return (
+    <Sidebar collapsible="icon" {...props}>
+      <SidebarHeader>
+        <SidebarMenu>
+          <SidebarMenuItem>
+            <SidebarMenuButton
+              size="lg"
+              render={<Link to="/" aria-label="Ir a Inicio" />}
+            >
+              <div className="bg-primary text-primary-foreground flex aspect-square size-8 items-center justify-center rounded-lg">
+                <Wallet className="size-4" strokeWidth={2.5} />
+              </div>
+              <span
+                className="text-base font-bold tracking-tight"
+                style={{ fontFamily: "var(--font-heading)" }}
+              >
+                Wealthy<span className="text-primary">Smart</span>
+              </span>
+            </SidebarMenuButton>
+          </SidebarMenuItem>
+        </SidebarMenu>
+      </SidebarHeader>
+
+      <SidebarContent>
+        {navSections.map((section) => (
+          <SidebarGroup key={section.label}>
+            <SidebarGroupLabel>{section.label}</SidebarGroupLabel>
+            <SidebarGroupContent>
+              <SidebarMenu>
+                {section.items.map(({ to, icon: Icon, label }) => (
+                  <SidebarMenuItem key={to}>
+                    <SidebarMenuButton
+                      isActive={isNavActive(to, pathname)}
+                      tooltip={label}
+                      render={
+                        <Link to={to} onClick={() => setOpenMobile(false)} />
+                      }
+                    >
+                      <Icon />
+                      <span>{label}</span>
+                    </SidebarMenuButton>
+                    {to === "/sync" && syncWarnings > 0 && (
+                      <SidebarMenuBadge>
+                        <span
+                          className="size-2 rounded-full bg-amber-500"
+                          title={`${syncWarnings} fuente(s) atrasada(s)`}
+                          aria-label={`${syncWarnings} fuentes de datos atrasadas`}
+                        />
+                      </SidebarMenuBadge>
+                    )}
+                  </SidebarMenuItem>
+                ))}
+              </SidebarMenu>
+            </SidebarGroupContent>
+          </SidebarGroup>
+        ))}
+      </SidebarContent>
+
+      <SidebarFooter>
+        <NavUser />
+      </SidebarFooter>
+      <SidebarRail />
+    </Sidebar>
+  );
+}

frontend/src/components/nav-user.tsx

@@ -0,0 +1,108 @@
+import { ChevronsUpDown, Eye, EyeOff, LogOut, Moon, Sun } from "lucide-react";
+import { useNavigate } from "react-router-dom";
+import { useQuery } from "@tanstack/react-query";
+
+import { getMe } from "@/lib/api";
+import { useTheme } from "@/contexts/theme-context";
+import { usePrivacy } from "@/contexts/privacy-context";
+import { useAuth } from "@/AuthContext";
+import { Avatar, AvatarFallback } from "@/components/ui/avatar";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuGroup,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import {
+  SidebarMenu,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  useSidebar,
+} from "@/components/ui/sidebar";
+
+export function NavUser() {
+  const { isMobile } = useSidebar();
+  const { theme, toggleTheme } = useTheme();
+  const { privacyMode, togglePrivacy } = usePrivacy();
+  const { logout } = useAuth();
+  const navigate = useNavigate();
+
+  const meQ = useQuery({
+    queryKey: ["me"],
+    queryFn: () => getMe().then((r) => r.data),
+    staleTime: Infinity,
+  });
+  const username = meQ.data?.username ?? "Usuario";
+  const initials = username.slice(0, 2).toUpperCase();
+
+  const handleLogout = async () => {
+    await logout();
+    navigate("/login", { replace: true });
+  };
+
+  return (
+    <SidebarMenu>
+      <SidebarMenuItem>
+        <DropdownMenu>
+          <DropdownMenuTrigger
+            render={
+              <SidebarMenuButton size="lg" className="aria-expanded:bg-muted" />
+            }
+          >
+            <Avatar>
+              <AvatarFallback>{initials}</AvatarFallback>
+            </Avatar>
+            <div className="grid flex-1 text-left text-sm leading-tight">
+              <span className="truncate font-medium">{username}</span>
+              <span className="truncate text-xs text-muted-foreground">
+                WealthySmart
+              </span>
+            </div>
+            <ChevronsUpDown className="ml-auto size-4" />
+          </DropdownMenuTrigger>
+          <DropdownMenuContent
+            className="w-fit min-w-48"
+            side={isMobile ? "bottom" : "right"}
+            align="end"
+            sideOffset={4}
+          >
+            <DropdownMenuGroup>
+              <DropdownMenuLabel className="p-0 font-normal">
+                <div className="flex items-center gap-2 px-1 py-1.5 text-left text-sm">
+                  <Avatar>
+                    <AvatarFallback>{initials}</AvatarFallback>
+                  </Avatar>
+                  <div className="grid flex-1 text-left text-sm leading-tight">
+                    <span className="truncate font-medium">{username}</span>
+                    <span className="truncate text-xs text-muted-foreground">
+                      WealthySmart
+                    </span>
+                  </div>
+                </div>
+              </DropdownMenuLabel>
+            </DropdownMenuGroup>
+            <DropdownMenuSeparator />
+            <DropdownMenuGroup>
+              <DropdownMenuItem onClick={togglePrivacy}>
+                {privacyMode ? <EyeOff /> : <Eye />}
+                {privacyMode ? "Desactivar modo privado" : "Modo privado"}
+              </DropdownMenuItem>
+              <DropdownMenuItem onClick={toggleTheme}>
+                {theme === "dark" ? <Sun /> : <Moon />}
+                {theme === "dark" ? "Tema claro" : "Tema oscuro"}
+              </DropdownMenuItem>
+            </DropdownMenuGroup>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem onClick={() => void handleLogout()}>
+              <LogOut />
+              Cerrar sesión
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      </SidebarMenuItem>
+    </SidebarMenu>
+  );
+}