Fix dashboard data findings from browser verification

- Próximas cuotas: headline is the upcoming billing batch (sum of every
  active plan's next cuota, using the rounding-absorbing last cuota
  when it's the pending one) — the in-cycle formula was ~always zero
  since cuotas bill on the 19th, day one of the next cycle.
- useAgent must name the 'wealthysmart' agent (default crashed the page).
- /transactions/recent excludes future-dated Tasa Cero cuotas.

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

backend/app/api/v1/endpoints/transactions.py

@@ -253,9 +253,15 @@ def recent_transactions(
     session: Session = Depends(get_session),
     _user: str = Depends(get_current_user),
 ):
+    from app.timeutil import utcnow
+
     query = (
         select(Transaction)
-        .where(Transaction.source == TransactionSource.CREDIT_CARD)
+        .where(
+            Transaction.source == TransactionSource.CREDIT_CARD,
+            # Tasa Cero generates future-dated cuotas; "recent" means billed.
+            Transaction.date <= utcnow(),
+        )
         .order_by(col(Transaction.date).desc(), col(Transaction.id).desc())
         .limit(limit)
     )

frontend/components.json

@@ -20,6 +20,5 @@
     "hooks": "@/hooks"
   },
   "menuColor": "default-translucent",
-  "menuAccent": "subtle",
-  "registries": {}
+  "menuAccent": "subtle"
 }

frontend/src/App.tsx

@@ -16,6 +16,7 @@ const queryClient = new QueryClient({
 });
 import Layout from "./components/Layout";
 import LoginPage from "./pages/Login";
+import Inicio from "./pages/Inicio";
 import Asistente from "./pages/Asistente";
 import Analytics from "./pages/Analytics";
 import Budget from "./pages/Budget";
@@ -42,7 +43,7 @@ function AppRoutes() {
     <Routes>
       <Route
         path="/login"
-        element={isAuthenticated ? <Navigate to="/asistente" replace /> : <LoginPage />}
+        element={isAuthenticated ? <Navigate to="/" replace /> : <LoginPage />}
       />
       <Route
         element={
@@ -51,7 +52,7 @@ function AppRoutes() {
           </ProtectedRoute>
         }
       >
-        <Route index element={<Navigate to="/asistente" replace />} />
+        <Route index element={<Inicio />} />
         <Route path="/asistente" element={<Asistente />} />
         <Route path="/budget" element={<Budget />} />
         <Route path="/analytics" element={<Analytics />} />

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">
+        </header>
+        <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/TransactionList.tsx

@@ -48,6 +48,11 @@ export interface TransactionListProps {
   addLabel?: string;
   onToggleDeferred?: (tx: Transaction) => void;
   onConvertTasaCero?: (tx: Transaction) => void;
+  /** Extra toolbar content, e.g. source tabs (left) and the CSV button (right). */
+  toolbarLeft?: React.ReactNode;
+  toolbarRight?: React.ReactNode;
+  /** Period hint shown in the summary strip, e.g. "Ciclo 18 jun – 18 jul". */
+  summaryLabel?: string;
 }
 
 export default function TransactionList({
@@ -61,9 +66,12 @@ export default function TransactionList({
   emptyMessage = 'No transactions found',
   showCategory = true,
   showSourceIcon = false,
-  addLabel = 'Add Transaction',
+  addLabel = 'Agregar transacción',
   onToggleDeferred,
   onConvertTasaCero,
+  toolbarLeft,
+  toolbarRight,
+  summaryLabel,
 }: TransactionListProps) {
   const [modalOpen, setModalOpen] = useState(false);
   const [editing, setEditing] = useState<Transaction | null>(null);
@@ -194,28 +202,76 @@ export default function TransactionList({
     : transactions;
   const empty = visibleTransactions.length === 0 && !loading;
 
+  // Net spend of the listed transactions per currency: COMPRA − DEVOLUCION,
+  // excluding Tasa Cero anchors (their cuotas are what count in the budget).
+  const totalsByCurrency = useMemo(() => {
+    const totals = new Map<string, number>();
+    for (const tx of visibleTransactions) {
+      if (tx.is_installment_anchor) continue;
+      if (tx.transaction_type !== 'COMPRA' && tx.transaction_type !== 'DEVOLUCION') continue;
+      const sign = tx.transaction_type === 'DEVOLUCION' ? -1 : 1;
+      totals.set(tx.currency, (totals.get(tx.currency) ?? 0) + sign * tx.amount);
+    }
+    // CRC first, then the rest alphabetically
+    return [...totals.entries()].sort(([a], [b]) =>
+      a === 'CRC' ? -1 : b === 'CRC' ? 1 : a.localeCompare(b),
+    );
+  }, [visibleTransactions]);
+
   return (
     <>
-      {/* Search + Add */}
-      <div className="flex items-center gap-3">
-        <div className="relative flex-1 max-w-sm">
+      <Card className="overflow-hidden">
+      <CardContent className="p-0">
+
+      {/* Toolbar: source tabs · search · CSV · add */}
+      <div className="flex flex-wrap items-center gap-2 p-3 border-b border-border">
+        {toolbarLeft}
+        <div className="relative flex-1 min-w-44 max-w-sm">
           <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
           <Input
             value={search}
             onChange={(e) => onSearchChange(e.target.value)}
             className="pl-10"
-            placeholder="Search merchants..."
+            placeholder="Buscar comercio…"
           />
         </div>
-        <Button onClick={() => { setEditing(null); setModalOpen(true); }}>
-          <Plus className="w-4 h-4" />
-          {addLabel}
-        </Button>
+        <div className="ml-auto flex items-center gap-2">
+          {toolbarRight}
+          <Button onClick={() => { setEditing(null); setModalOpen(true); }}>
+            <Plus className="w-4 h-4" />
+            {addLabel}
+          </Button>
+        </div>
       </div>
 
+      {/* Summary strip: period · count · total */}
+      {visibleTransactions.length > 0 && (
+        <div className="flex flex-wrap items-center justify-between gap-x-4 gap-y-1 px-4 py-2 border-b border-border bg-muted/30 text-sm">
+          <span className="text-muted-foreground">
+            {summaryLabel ? `${summaryLabel} · ` : ''}
+            {visibleTransactions.length} transaccion{visibleTransactions.length === 1 ? '' : 'es'}
+          </span>
+          {totalsByCurrency.length > 0 && (
+            <span
+              className="flex items-center gap-1.5 text-muted-foreground"
+              title="Compras menos devoluciones de las transacciones listadas. Excluye compras convertidas a Tasa Cero (cuentan sus cuotas)."
+            >
+              Total:
+              {totalsByCurrency.map(([currency, net], i) => (
+                <span key={currency} data-sensitive className="font-mono font-semibold text-foreground">
+                  {i > 0 && <span className="text-muted-foreground font-normal mr-1.5">+</span>}
+                  {net < 0 ? '+' : ''}
+                  {formatAmount(net, currency)}
+                </span>
+              ))}
+            </span>
+          )}
+        </div>
+      )}
+
       {/* Bulk action bar */}
       {selected.size > 0 && (
-        <div className="hidden md:flex items-center gap-2 rounded-lg border bg-muted/40 px-3 py-2">
+        <div className="hidden md:flex items-center gap-2 border-b border-border bg-muted/40 px-3 py-2">
           <span className="text-sm font-medium">
             {selected.size} seleccionada{selected.size === 1 ? '' : 's'}
           </span>
@@ -292,8 +348,7 @@ export default function TransactionList({
       )}
 
       {/* Mobile list */}
-      <Card className="md:hidden">
-        <CardContent className="p-0 divide-y divide-border">
+      <div className="md:hidden divide-y divide-border">
           {empty ? (
             <div className="px-5 py-16 text-center text-muted-foreground text-sm">
               {emptyIcon || <ArrowLeftRight className="w-8 h-8 mx-auto mb-3 text-muted-foreground/50" />}
@@ -387,13 +442,13 @@ export default function TransactionList({
                       <ArrowRightFromLine className="w-4 h-4" />
                     </Button>
                   )}
-                  <Button variant="ghost" size="icon" title="Edit transaction" aria-label="Edit transaction" onClick={() => handleEdit(tx)}>
+                  <Button variant="ghost" size="icon" title="Editar transacción" aria-label="Edit transaction" onClick={() => handleEdit(tx)}>
                     <Pencil className="w-4 h-4" />
                   </Button>
                   <Button
                     variant="ghost"
                     size="icon"
-                    title="Delete transaction"
+                    title="Eliminar transacción"
                     aria-label="Delete transaction"
                     onClick={() => setDeleteId(tx.id)}
                     className="hover:text-destructive"
@@ -404,12 +459,10 @@ export default function TransactionList({
               </div>
             ))
           )}
-        </CardContent>
-      </Card>
+      </div>
 
       {/* Desktop table */}
-      <Card className="hidden md:block">
-        <CardContent className="p-0">
+      <div className="hidden md:block">
           <DataTable
             columns={columns}
             data={visibleTransactions}
@@ -418,7 +471,9 @@ export default function TransactionList({
             initialSorting={[{ id: 'date', desc: true }]}
             emptyMessage={emptyMessage}
           />
-        </CardContent>
+      </div>
+
+      </CardContent>
       </Card>
 
       {/* Modals */}

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>
+  );
+}

frontend/src/components/transactions/transaction-columns.tsx

@@ -65,7 +65,7 @@ export function getTransactionColumns({
   columns.push(
     {
       accessorKey: 'date',
-      header: ({ column }) => <DataTableColumnHeader column={column} title="Date" />,
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Fecha" />,
       cell: ({ row }) => (
         <span className="font-mono text-muted-foreground text-xs whitespace-nowrap">
           {new Date(row.original.date).toLocaleDateString('es-CR', {
@@ -78,7 +78,7 @@ export function getTransactionColumns({
     },
     {
       accessorKey: 'merchant',
-      header: ({ column }) => <DataTableColumnHeader column={column} title="Merchant" />,
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Comercio" />,
       cell: ({ row }) => {
         const tx = row.original;
         return (
@@ -129,7 +129,7 @@ export function getTransactionColumns({
     columns.push({
       accessorFn: (row) => row.category?.name ?? '',
       id: 'category',
-      header: ({ column }) => <DataTableColumnHeader column={column} title="Category" />,
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Categoría" />,
       cell: ({ row }) => {
         const category = row.original.category;
         return category ? (
@@ -146,7 +146,7 @@ export function getTransactionColumns({
       accessorKey: 'amount',
       meta: { className: 'text-right' },
       header: ({ column }) => (
-        <DataTableColumnHeader column={column} title="Amount" className="justify-end" />
+        <DataTableColumnHeader column={column} title="Monto" className="justify-end" />
       ),
       cell: ({ row }) => {
         const tx = row.original;
@@ -204,7 +204,7 @@ export function getTransactionColumns({
             <Button
               variant="ghost"
               size="icon"
-              title="Edit transaction"
+              title="Editar transacción"
               aria-label="Edit transaction"
               onClick={() => onEdit(tx)}
             >
@@ -213,7 +213,7 @@ export function getTransactionColumns({
             <Button
               variant="ghost"
               size="icon"
-              title="Delete transaction"
+              title="Eliminar transacción"
               aria-label="Delete transaction"
               onClick={() => onDelete(tx.id)}
               className="hover:text-destructive"

frontend/src/components/ui/avatar.tsx

@@ -0,0 +1,109 @@
+"use client"
+
+import * as React from "react"
+import { Avatar as AvatarPrimitive } from "@base-ui/react/avatar"
+
+import { cn } from "@/lib/utils"
+
+function Avatar({
+  className,
+  size = "default",
+  ...props
+}: AvatarPrimitive.Root.Props & {
+  size?: "default" | "sm" | "lg"
+}) {
+  return (
+    <AvatarPrimitive.Root
+      data-slot="avatar"
+      data-size={size}
+      className={cn(
+        "group/avatar relative flex size-8 shrink-0 rounded-full select-none after:absolute after:inset-0 after:rounded-full after:border after:border-border after:mix-blend-darken data-[size=lg]:size-10 data-[size=sm]:size-6 dark:after:mix-blend-lighten",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarImage({ className, ...props }: AvatarPrimitive.Image.Props) {
+  return (
+    <AvatarPrimitive.Image
+      data-slot="avatar-image"
+      className={cn(
+        "aspect-square size-full rounded-full object-cover",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarFallback({
+  className,
+  ...props
+}: AvatarPrimitive.Fallback.Props) {
+  return (
+    <AvatarPrimitive.Fallback
+      data-slot="avatar-fallback"
+      className={cn(
+        "flex size-full items-center justify-center rounded-full bg-muted text-sm text-muted-foreground group-data-[size=sm]/avatar:text-xs",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarBadge({ className, ...props }: React.ComponentProps<"span">) {
+  return (
+    <span
+      data-slot="avatar-badge"
+      className={cn(
+        "absolute right-0 bottom-0 z-10 inline-flex items-center justify-center rounded-full bg-primary text-primary-foreground bg-blend-color ring-2 ring-background select-none",
+        "group-data-[size=sm]/avatar:size-2 group-data-[size=sm]/avatar:[&>svg]:hidden",
+        "group-data-[size=default]/avatar:size-2.5 group-data-[size=default]/avatar:[&>svg]:size-2",
+        "group-data-[size=lg]/avatar:size-3 group-data-[size=lg]/avatar:[&>svg]:size-2",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarGroup({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="avatar-group"
+      className={cn(
+        "group/avatar-group flex -space-x-2 *:data-[slot=avatar]:ring-2 *:data-[slot=avatar]:ring-background",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarGroupCount({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="avatar-group-count"
+      className={cn(
+        "relative flex size-8 shrink-0 items-center justify-center rounded-full bg-muted text-sm text-muted-foreground ring-2 ring-background group-has-data-[size=lg]/avatar-group:size-10 group-has-data-[size=sm]/avatar-group:size-6 [&>svg]:size-4 group-has-data-[size=lg]/avatar-group:[&>svg]:size-5 group-has-data-[size=sm]/avatar-group:[&>svg]:size-3",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Avatar,
+  AvatarImage,
+  AvatarFallback,
+  AvatarGroup,
+  AvatarGroupCount,
+  AvatarBadge,
+}

frontend/src/components/ui/breadcrumb.tsx

@@ -0,0 +1,125 @@
+import * as React from "react"
+import { mergeProps } from "@base-ui/react/merge-props"
+import { useRender } from "@base-ui/react/use-render"
+
+import { cn } from "@/lib/utils"
+import { ChevronRightIcon, MoreHorizontalIcon } from "lucide-react"
+
+function Breadcrumb({ className, ...props }: React.ComponentProps<"nav">) {
+  return (
+    <nav
+      aria-label="breadcrumb"
+      data-slot="breadcrumb"
+      className={cn(className)}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbList({ className, ...props }: React.ComponentProps<"ol">) {
+  return (
+    <ol
+      data-slot="breadcrumb-list"
+      className={cn(
+        "flex flex-wrap items-center gap-1.5 text-sm wrap-break-word text-muted-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbItem({ className, ...props }: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="breadcrumb-item"
+      className={cn("inline-flex items-center gap-1", className)}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbLink({
+  className,
+  render,
+  ...props
+}: useRender.ComponentProps<"a">) {
+  return useRender({
+    defaultTagName: "a",
+    props: mergeProps<"a">(
+      {
+        className: cn("transition-colors hover:text-foreground", className),
+      },
+      props
+    ),
+    render,
+    state: {
+      slot: "breadcrumb-link",
+    },
+  })
+}
+
+function BreadcrumbPage({ className, ...props }: React.ComponentProps<"span">) {
+  return (
+    <span
+      data-slot="breadcrumb-page"
+      role="link"
+      aria-disabled="true"
+      aria-current="page"
+      className={cn("font-normal text-foreground", className)}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbSeparator({
+  children,
+  className,
+  ...props
+}: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="breadcrumb-separator"
+      role="presentation"
+      aria-hidden="true"
+      className={cn("[&>svg]:size-3.5", className)}
+      {...props}
+    >
+      {children ?? (
+        <ChevronRightIcon />
+      )}
+    </li>
+  )
+}
+
+function BreadcrumbEllipsis({
+  className,
+  ...props
+}: React.ComponentProps<"span">) {
+  return (
+    <span
+      data-slot="breadcrumb-ellipsis"
+      role="presentation"
+      aria-hidden="true"
+      className={cn(
+        "flex size-5 items-center justify-center [&>svg]:size-4",
+        className
+      )}
+      {...props}
+    >
+      <MoreHorizontalIcon
+      />
+      <span className="sr-only">More</span>
+    </span>
+  )
+}
+
+export {
+  Breadcrumb,
+  BreadcrumbList,
+  BreadcrumbItem,
+  BreadcrumbLink,
+  BreadcrumbPage,
+  BreadcrumbSeparator,
+  BreadcrumbEllipsis,
+}

frontend/src/components/ui/collapsible.tsx

@@ -0,0 +1,19 @@
+import { Collapsible as CollapsiblePrimitive } from "@base-ui/react/collapsible"
+
+function Collapsible({ ...props }: CollapsiblePrimitive.Root.Props) {
+  return <CollapsiblePrimitive.Root data-slot="collapsible" {...props} />
+}
+
+function CollapsibleTrigger({ ...props }: CollapsiblePrimitive.Trigger.Props) {
+  return (
+    <CollapsiblePrimitive.Trigger data-slot="collapsible-trigger" {...props} />
+  )
+}
+
+function CollapsibleContent({ ...props }: CollapsiblePrimitive.Panel.Props) {
+  return (
+    <CollapsiblePrimitive.Panel data-slot="collapsible-content" {...props} />
+  )
+}
+
+export { Collapsible, CollapsibleTrigger, CollapsibleContent }

frontend/src/components/ui/sidebar.tsx

@@ -0,0 +1,723 @@
+"use client"
+
+import * as React from "react"
+import { mergeProps } from "@base-ui/react/merge-props"
+import { useRender } from "@base-ui/react/use-render"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { useIsMobile } from "@/hooks/use-mobile"
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { Separator } from "@/components/ui/separator"
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle,
+} from "@/components/ui/sheet"
+import { Skeleton } from "@/components/ui/skeleton"
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipTrigger,
+} from "@/components/ui/tooltip"
+import { PanelLeftIcon } from "lucide-react"
+
+const SIDEBAR_COOKIE_NAME = "sidebar_state"
+const SIDEBAR_COOKIE_MAX_AGE = 60 * 60 * 24 * 7
+const SIDEBAR_WIDTH = "16rem"
+const SIDEBAR_WIDTH_MOBILE = "18rem"
+const SIDEBAR_WIDTH_ICON = "3rem"
+const SIDEBAR_KEYBOARD_SHORTCUT = "b"
+
+type SidebarContextProps = {
+  state: "expanded" | "collapsed"
+  open: boolean
+  setOpen: (open: boolean) => void
+  openMobile: boolean
+  setOpenMobile: (open: boolean) => void
+  isMobile: boolean
+  toggleSidebar: () => void
+}
+
+const SidebarContext = React.createContext<SidebarContextProps | null>(null)
+
+function useSidebar() {
+  const context = React.useContext(SidebarContext)
+  if (!context) {
+    throw new Error("useSidebar must be used within a SidebarProvider.")
+  }
+
+  return context
+}
+
+function SidebarProvider({
+  defaultOpen = true,
+  open: openProp,
+  onOpenChange: setOpenProp,
+  className,
+  style,
+  children,
+  ...props
+}: React.ComponentProps<"div"> & {
+  defaultOpen?: boolean
+  open?: boolean
+  onOpenChange?: (open: boolean) => void
+}) {
+  const isMobile = useIsMobile()
+  const [openMobile, setOpenMobile] = React.useState(false)
+
+  // This is the internal state of the sidebar.
+  // We use openProp and setOpenProp for control from outside the component.
+  const [_open, _setOpen] = React.useState(defaultOpen)
+  const open = openProp ?? _open
+  const setOpen = React.useCallback(
+    (value: boolean | ((value: boolean) => boolean)) => {
+      const openState = typeof value === "function" ? value(open) : value
+      if (setOpenProp) {
+        setOpenProp(openState)
+      } else {
+        _setOpen(openState)
+      }
+
+      // This sets the cookie to keep the sidebar state.
+      document.cookie = `${SIDEBAR_COOKIE_NAME}=${openState}; path=/; max-age=${SIDEBAR_COOKIE_MAX_AGE}`
+    },
+    [setOpenProp, open]
+  )
+
+  // Helper to toggle the sidebar.
+  const toggleSidebar = React.useCallback(() => {
+    return isMobile ? setOpenMobile((open) => !open) : setOpen((open) => !open)
+  }, [isMobile, setOpen, setOpenMobile])
+
+  // Adds a keyboard shortcut to toggle the sidebar.
+  React.useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (
+        event.key === SIDEBAR_KEYBOARD_SHORTCUT &&
+        (event.metaKey || event.ctrlKey)
+      ) {
+        event.preventDefault()
+        toggleSidebar()
+      }
+    }
+
+    window.addEventListener("keydown", handleKeyDown)
+    return () => window.removeEventListener("keydown", handleKeyDown)
+  }, [toggleSidebar])
+
+  // We add a state so that we can do data-state="expanded" or "collapsed".
+  // This makes it easier to style the sidebar with Tailwind classes.
+  const state = open ? "expanded" : "collapsed"
+
+  const contextValue = React.useMemo<SidebarContextProps>(
+    () => ({
+      state,
+      open,
+      setOpen,
+      isMobile,
+      openMobile,
+      setOpenMobile,
+      toggleSidebar,
+    }),
+    [state, open, setOpen, isMobile, openMobile, setOpenMobile, toggleSidebar]
+  )
+
+  return (
+    <SidebarContext.Provider value={contextValue}>
+      <div
+        data-slot="sidebar-wrapper"
+        style={
+          {
+            "--sidebar-width": SIDEBAR_WIDTH,
+            "--sidebar-width-icon": SIDEBAR_WIDTH_ICON,
+            ...style,
+          } as React.CSSProperties
+        }
+        className={cn(
+          "group/sidebar-wrapper flex min-h-svh w-full has-data-[variant=inset]:bg-sidebar",
+          className
+        )}
+        {...props}
+      >
+        {children}
+      </div>
+    </SidebarContext.Provider>
+  )
+}
+
+function Sidebar({
+  side = "left",
+  variant = "sidebar",
+  collapsible = "offcanvas",
+  className,
+  children,
+  dir,
+  ...props
+}: React.ComponentProps<"div"> & {
+  side?: "left" | "right"
+  variant?: "sidebar" | "floating" | "inset"
+  collapsible?: "offcanvas" | "icon" | "none"
+}) {
+  const { isMobile, state, openMobile, setOpenMobile } = useSidebar()
+
+  if (collapsible === "none") {
+    return (
+      <div
+        data-slot="sidebar"
+        className={cn(
+          "flex h-full w-(--sidebar-width) flex-col bg-sidebar text-sidebar-foreground",
+          className
+        )}
+        {...props}
+      >
+        {children}
+      </div>
+    )
+  }
+
+  if (isMobile) {
+    return (
+      <Sheet open={openMobile} onOpenChange={setOpenMobile} {...props}>
+        <SheetContent
+          dir={dir}
+          data-sidebar="sidebar"
+          data-slot="sidebar"
+          data-mobile="true"
+          className="w-(--sidebar-width) bg-sidebar p-0 text-sidebar-foreground [&>button]:hidden"
+          style={
+            {
+              "--sidebar-width": SIDEBAR_WIDTH_MOBILE,
+            } as React.CSSProperties
+          }
+          side={side}
+        >
+          <SheetHeader className="sr-only">
+            <SheetTitle>Sidebar</SheetTitle>
+            <SheetDescription>Displays the mobile sidebar.</SheetDescription>
+          </SheetHeader>
+          <div className="flex h-full w-full flex-col">{children}</div>
+        </SheetContent>
+      </Sheet>
+    )
+  }
+
+  return (
+    <div
+      className="group peer hidden text-sidebar-foreground md:block"
+      data-state={state}
+      data-collapsible={state === "collapsed" ? collapsible : ""}
+      data-variant={variant}
+      data-side={side}
+      data-slot="sidebar"
+    >
+      {/* This is what handles the sidebar gap on desktop */}
+      <div
+        data-slot="sidebar-gap"
+        className={cn(
+          "relative w-(--sidebar-width) bg-transparent transition-[width] duration-200 ease-linear",
+          "group-data-[collapsible=offcanvas]:w-0",
+          "group-data-[side=right]:rotate-180",
+          variant === "floating" || variant === "inset"
+            ? "group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4)))]"
+            : "group-data-[collapsible=icon]:w-(--sidebar-width-icon)"
+        )}
+      />
+      <div
+        data-slot="sidebar-container"
+        data-side={side}
+        className={cn(
+          "fixed inset-y-0 z-10 hidden h-svh w-(--sidebar-width) transition-[left,right,width] duration-200 ease-linear data-[side=left]:left-0 data-[side=left]:group-data-[collapsible=offcanvas]:left-[calc(var(--sidebar-width)*-1)] data-[side=right]:right-0 data-[side=right]:group-data-[collapsible=offcanvas]:right-[calc(var(--sidebar-width)*-1)] md:flex",
+          // Adjust the padding for floating and inset variants.
+          variant === "floating" || variant === "inset"
+            ? "p-2 group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4))+2px)]"
+            : "group-data-[collapsible=icon]:w-(--sidebar-width-icon) group-data-[side=left]:border-r group-data-[side=right]:border-l",
+          className
+        )}
+        {...props}
+      >
+        <div
+          data-sidebar="sidebar"
+          data-slot="sidebar-inner"
+          className="flex size-full flex-col bg-sidebar group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:shadow-sm group-data-[variant=floating]:ring-1 group-data-[variant=floating]:ring-sidebar-border"
+        >
+          {children}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+function SidebarTrigger({
+  className,
+  onClick,
+  ...props
+}: React.ComponentProps<typeof Button>) {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <Button
+      data-sidebar="trigger"
+      data-slot="sidebar-trigger"
+      variant="ghost"
+      size="icon-sm"
+      className={cn(className)}
+      onClick={(event) => {
+        onClick?.(event)
+        toggleSidebar()
+      }}
+      {...props}
+    >
+      <PanelLeftIcon />
+      <span className="sr-only">Toggle Sidebar</span>
+    </Button>
+  )
+}
+
+function SidebarRail({ className, ...props }: React.ComponentProps<"button">) {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <button
+      data-sidebar="rail"
+      data-slot="sidebar-rail"
+      aria-label="Toggle Sidebar"
+      tabIndex={-1}
+      onClick={toggleSidebar}
+      title="Toggle Sidebar"
+      className={cn(
+        "absolute inset-y-0 z-20 hidden w-4 transition-all ease-linear group-data-[side=left]:-right-4 group-data-[side=right]:left-0 after:absolute after:inset-y-0 after:start-1/2 after:w-[2px] hover:after:bg-sidebar-border sm:flex ltr:-translate-x-1/2 rtl:-translate-x-1/2",
+        "in-data-[side=left]:cursor-w-resize in-data-[side=right]:cursor-e-resize",
+        "[[data-side=left][data-state=collapsed]_&]:cursor-e-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize",
+        "group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:left-full hover:group-data-[collapsible=offcanvas]:bg-sidebar",
+        "[[data-side=left][data-collapsible=offcanvas]_&]:-right-2",
+        "[[data-side=right][data-collapsible=offcanvas]_&]:-left-2",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarInset({ className, ...props }: React.ComponentProps<"main">) {
+  return (
+    <main
+      data-slot="sidebar-inset"
+      className={cn(
+        "relative flex w-full flex-1 flex-col bg-background md:peer-data-[variant=inset]:m-2 md:peer-data-[variant=inset]:ml-0 md:peer-data-[variant=inset]:rounded-xl md:peer-data-[variant=inset]:shadow-sm md:peer-data-[variant=inset]:peer-data-[state=collapsed]:ml-2",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarInput({
+  className,
+  ...props
+}: React.ComponentProps<typeof Input>) {
+  return (
+    <Input
+      data-slot="sidebar-input"
+      data-sidebar="input"
+      className={cn("h-8 w-full bg-background shadow-none", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-header"
+      data-sidebar="header"
+      className={cn("flex flex-col gap-2 p-2", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-footer"
+      data-sidebar="footer"
+      className={cn("flex flex-col gap-2 p-2", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarSeparator({
+  className,
+  ...props
+}: React.ComponentProps<typeof Separator>) {
+  return (
+    <Separator
+      data-slot="sidebar-separator"
+      data-sidebar="separator"
+      className={cn("mx-2 w-auto bg-sidebar-border", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarContent({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-content"
+      data-sidebar="content"
+      className={cn(
+        "no-scrollbar flex min-h-0 flex-1 flex-col gap-0 overflow-auto group-data-[collapsible=icon]:overflow-hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroup({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-group"
+      data-sidebar="group"
+      className={cn("relative flex w-full min-w-0 flex-col p-2", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroupLabel({
+  className,
+  render,
+  ...props
+}: useRender.ComponentProps<"div"> & React.ComponentProps<"div">) {
+  return useRender({
+    defaultTagName: "div",
+    props: mergeProps<"div">(
+      {
+        className: cn(
+          "flex h-8 shrink-0 items-center rounded-md px-2 text-xs font-medium text-sidebar-foreground/70 ring-sidebar-ring outline-hidden transition-[margin,opacity] duration-200 ease-linear group-data-[collapsible=icon]:-mt-8 group-data-[collapsible=icon]:opacity-0 focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
+          className
+        ),
+      },
+      props
+    ),
+    render,
+    state: {
+      slot: "sidebar-group-label",
+      sidebar: "group-label",
+    },
+  })
+}
+
+function SidebarGroupAction({
+  className,
+  render,
+  ...props
+}: useRender.ComponentProps<"button"> & React.ComponentProps<"button">) {
+  return useRender({
+    defaultTagName: "button",
+    props: mergeProps<"button">(
+      {
+        className: cn(
+          "absolute top-3.5 right-3 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0",
+          className
+        ),
+      },
+      props
+    ),
+    render,
+    state: {
+      slot: "sidebar-group-action",
+      sidebar: "group-action",
+    },
+  })
+}
+
+function SidebarGroupContent({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-group-content"
+      data-sidebar="group-content"
+      className={cn("w-full text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenu({ className, ...props }: React.ComponentProps<"ul">) {
+  return (
+    <ul
+      data-slot="sidebar-menu"
+      data-sidebar="menu"
+      className={cn("flex w-full min-w-0 flex-col gap-0", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuItem({ className, ...props }: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="sidebar-menu-item"
+      data-sidebar="menu-item"
+      className={cn("group/menu-item relative", className)}
+      {...props}
+    />
+  )
+}
+
+const sidebarMenuButtonVariants = cva(
+  "peer/menu-button group/menu-button flex w-full items-center gap-2 overflow-hidden rounded-md p-2 text-left text-sm ring-sidebar-ring outline-hidden transition-[width,height,padding] group-has-data-[sidebar=menu-action]/menu-item:pr-8 group-data-[collapsible=icon]:size-8! group-data-[collapsible=icon]:p-2! hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-open:hover:bg-sidebar-accent data-open:hover:text-sidebar-accent-foreground data-active:bg-sidebar-accent data-active:font-medium data-active:text-sidebar-accent-foreground [&_svg]:size-4 [&_svg]:shrink-0 [&>span:last-child]:truncate",
+  {
+    variants: {
+      variant: {
+        default: "hover:bg-sidebar-accent hover:text-sidebar-accent-foreground",
+        outline:
+          "bg-background shadow-[0_0_0_1px_var(--sidebar-border)] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground hover:shadow-[0_0_0_1px_var(--sidebar-accent)]",
+      },
+      size: {
+        default: "h-8 text-sm",
+        sm: "h-7 text-xs",
+        lg: "h-12 text-sm group-data-[collapsible=icon]:p-0!",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function SidebarMenuButton({
+  render,
+  isActive = false,
+  variant = "default",
+  size = "default",
+  tooltip,
+  className,
+  ...props
+}: useRender.ComponentProps<"button"> &
+  React.ComponentProps<"button"> & {
+    isActive?: boolean
+    tooltip?: string | React.ComponentProps<typeof TooltipContent>
+  } & VariantProps<typeof sidebarMenuButtonVariants>) {
+  const { isMobile, state } = useSidebar()
+  const comp = useRender({
+    defaultTagName: "button",
+    props: mergeProps<"button">(
+      {
+        className: cn(sidebarMenuButtonVariants({ variant, size }), className),
+      },
+      props
+    ),
+    render: !tooltip ? render : <TooltipTrigger render={render} />,
+    state: {
+      slot: "sidebar-menu-button",
+      sidebar: "menu-button",
+      size,
+      active: isActive,
+    },
+  })
+
+  if (!tooltip) {
+    return comp
+  }
+
+  if (typeof tooltip === "string") {
+    tooltip = {
+      children: tooltip,
+    }
+  }
+
+  return (
+    <Tooltip>
+      {comp}
+      <TooltipContent
+        side="right"
+        align="center"
+        hidden={state !== "collapsed" || isMobile}
+        {...tooltip}
+      />
+    </Tooltip>
+  )
+}
+
+function SidebarMenuAction({
+  className,
+  render,
+  showOnHover = false,
+  ...props
+}: useRender.ComponentProps<"button"> &
+  React.ComponentProps<"button"> & {
+    showOnHover?: boolean
+  }) {
+  return useRender({
+    defaultTagName: "button",
+    props: mergeProps<"button">(
+      {
+        className: cn(
+          "absolute top-1.5 right-1 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[size=default]/menu-button:top-1.5 peer-data-[size=lg]/menu-button:top-2.5 peer-data-[size=sm]/menu-button:top-1 after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0",
+          showOnHover &&
+            "group-focus-within/menu-item:opacity-100 group-hover/menu-item:opacity-100 peer-data-active/menu-button:text-sidebar-accent-foreground aria-expanded:opacity-100 md:opacity-0",
+          className
+        ),
+      },
+      props
+    ),
+    render,
+    state: {
+      slot: "sidebar-menu-action",
+      sidebar: "menu-action",
+    },
+  })
+}
+
+function SidebarMenuBadge({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-menu-badge"
+      data-sidebar="menu-badge"
+      className={cn(
+        "pointer-events-none absolute right-1 flex h-5 min-w-5 items-center justify-center rounded-md px-1 text-xs font-medium text-sidebar-foreground tabular-nums select-none group-data-[collapsible=icon]:hidden peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[size=default]/menu-button:top-1.5 peer-data-[size=lg]/menu-button:top-2.5 peer-data-[size=sm]/menu-button:top-1 peer-data-active/menu-button:text-sidebar-accent-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSkeleton({
+  className,
+  showIcon = false,
+  ...props
+}: React.ComponentProps<"div"> & {
+  showIcon?: boolean
+}) {
+  // Random width between 50 to 90%.
+  const [width] = React.useState(() => {
+    return `${Math.floor(Math.random() * 40) + 50}%`
+  })
+
+  return (
+    <div
+      data-slot="sidebar-menu-skeleton"
+      data-sidebar="menu-skeleton"
+      className={cn("flex h-8 items-center gap-2 rounded-md px-2", className)}
+      {...props}
+    >
+      {showIcon && (
+        <Skeleton
+          className="size-4 rounded-md"
+          data-sidebar="menu-skeleton-icon"
+        />
+      )}
+      <Skeleton
+        className="h-4 max-w-(--skeleton-width) flex-1"
+        data-sidebar="menu-skeleton-text"
+        style={
+          {
+            "--skeleton-width": width,
+          } as React.CSSProperties
+        }
+      />
+    </div>
+  )
+}
+
+function SidebarMenuSub({ className, ...props }: React.ComponentProps<"ul">) {
+  return (
+    <ul
+      data-slot="sidebar-menu-sub"
+      data-sidebar="menu-sub"
+      className={cn(
+        "mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-l border-sidebar-border px-2.5 py-0.5 group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSubItem({
+  className,
+  ...props
+}: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="sidebar-menu-sub-item"
+      data-sidebar="menu-sub-item"
+      className={cn("group/menu-sub-item relative", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSubButton({
+  render,
+  size = "md",
+  isActive = false,
+  className,
+  ...props
+}: useRender.ComponentProps<"a"> &
+  React.ComponentProps<"a"> & {
+    size?: "sm" | "md"
+    isActive?: boolean
+  }) {
+  return useRender({
+    defaultTagName: "a",
+    props: mergeProps<"a">(
+      {
+        className: cn(
+          "flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground ring-sidebar-ring outline-hidden group-data-[collapsible=icon]:hidden hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[size=md]:text-sm data-[size=sm]:text-xs data-active:bg-sidebar-accent data-active:text-sidebar-accent-foreground [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground",
+          className
+        ),
+      },
+      props
+    ),
+    render,
+    state: {
+      slot: "sidebar-menu-sub-button",
+      sidebar: "menu-sub-button",
+      size,
+      active: isActive,
+    },
+  })
+}
+
+export {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarGroup,
+  SidebarGroupAction,
+  SidebarGroupContent,
+  SidebarGroupLabel,
+  SidebarHeader,
+  SidebarInput,
+  SidebarInset,
+  SidebarMenu,
+  SidebarMenuAction,
+  SidebarMenuBadge,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  SidebarMenuSkeleton,
+  SidebarMenuSub,
+  SidebarMenuSubButton,
+  SidebarMenuSubItem,
+  SidebarProvider,
+  SidebarRail,
+  SidebarSeparator,
+  SidebarTrigger,
+  useSidebar,
+}

frontend/src/components/ui/tooltip.tsx

@@ -0,0 +1,64 @@
+import { Tooltip as TooltipPrimitive } from "@base-ui/react/tooltip"
+
+import { cn } from "@/lib/utils"
+
+function TooltipProvider({
+  delay = 0,
+  ...props
+}: TooltipPrimitive.Provider.Props) {
+  return (
+    <TooltipPrimitive.Provider
+      data-slot="tooltip-provider"
+      delay={delay}
+      {...props}
+    />
+  )
+}
+
+function Tooltip({ ...props }: TooltipPrimitive.Root.Props) {
+  return <TooltipPrimitive.Root data-slot="tooltip" {...props} />
+}
+
+function TooltipTrigger({ ...props }: TooltipPrimitive.Trigger.Props) {
+  return <TooltipPrimitive.Trigger data-slot="tooltip-trigger" {...props} />
+}
+
+function TooltipContent({
+  className,
+  side = "top",
+  sideOffset = 4,
+  align = "center",
+  alignOffset = 0,
+  children,
+  ...props
+}: TooltipPrimitive.Popup.Props &
+  Pick<
+    TooltipPrimitive.Positioner.Props,
+    "align" | "alignOffset" | "side" | "sideOffset"
+  >) {
+  return (
+    <TooltipPrimitive.Portal>
+      <TooltipPrimitive.Positioner
+        align={align}
+        alignOffset={alignOffset}
+        side={side}
+        sideOffset={sideOffset}
+        className="isolate z-50"
+      >
+        <TooltipPrimitive.Popup
+          data-slot="tooltip-content"
+          className={cn(
+            "z-50 inline-flex w-fit max-w-xs origin-(--transform-origin) items-center gap-1.5 rounded-md bg-foreground px-3 py-1.5 text-xs text-background has-data-[slot=kbd]:pr-1.5 data-[side=bottom]:slide-in-from-top-2 data-[side=inline-end]:slide-in-from-left-2 data-[side=inline-start]:slide-in-from-right-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 **:data-[slot=kbd]:relative **:data-[slot=kbd]:isolate **:data-[slot=kbd]:z-50 **:data-[slot=kbd]:rounded-sm data-[state=delayed-open]:animate-in data-[state=delayed-open]:fade-in-0 data-[state=delayed-open]:zoom-in-95 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
+            className
+          )}
+          {...props}
+        >
+          {children}
+          <TooltipPrimitive.Arrow className="z-50 size-2.5 translate-y-[calc(-50%-2px)] rotate-45 rounded-[2px] bg-foreground fill-foreground data-[side=bottom]:top-1 data-[side=inline-end]:top-1/2! data-[side=inline-end]:-left-1 data-[side=inline-end]:-translate-y-1/2 data-[side=inline-start]:top-1/2! data-[side=inline-start]:-right-1 data-[side=inline-start]:-translate-y-1/2 data-[side=left]:top-1/2! data-[side=left]:-right-1 data-[side=left]:-translate-y-1/2 data-[side=right]:top-1/2! data-[side=right]:-left-1 data-[side=right]:-translate-y-1/2 data-[side=top]:-bottom-2.5" />
+        </TooltipPrimitive.Popup>
+      </TooltipPrimitive.Positioner>
+    </TooltipPrimitive.Portal>
+  )
+}
+
+export { Tooltip, TooltipTrigger, TooltipContent, TooltipProvider }

frontend/src/hooks/use-mobile.ts

@@ -0,0 +1,19 @@
+import * as React from "react"
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener("change", onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener("change", onChange)
+  }, [])
+
+  return !!isMobile
+}

frontend/src/hooks/useBudget.ts

@@ -16,11 +16,11 @@ import {
 
 /** All budget data hangs off the ['budget', ...] key family; every mutation
  * invalidates the family so projection, month detail and items stay in sync. */
-export function useBudget(initialYear: number) {
+export function useBudget(initialYear: number, initialMonth?: number) {
   const queryClient = useQueryClient();
   const [year, setYear] = useState(initialYear);
   const [selectedMonth, setSelectedMonth] = useState<number>(
-    new Date().getMonth() + 1,
+    initialMonth ?? new Date().getMonth() + 1,
   );
 
   const projectionQ = useQuery({

frontend/src/lib/api.ts

@@ -130,6 +130,8 @@ export async function logout() {
   await fetch("/api/auth/logout", { method: "POST", credentials: "same-origin" });
 }
 
+export const getMe = () => api.get<{ username: string }>("/auth/me");
+
 // ─── Types ──────────────────────────────────────────────────────────────────
 
 export type Account = Schema<'AccountRead'>;
@@ -240,6 +242,11 @@ export const upsertBalanceOverride = (
 export const deleteBalanceOverride = (year: number, month: number) =>
   api.delete(`/budget/balance-override/${year}/${month}`);
 
+// --- Transactions ---
+
+export const getRecentTransactions = (limit = 5) =>
+  api.get<Transaction[]>("/transactions/recent", { params: { limit } });
+
 // --- Installment Plans (Tasa Cero) ---
 
 export type InstallmentPlan = Schema<'InstallmentPlanRead'>;

frontend/src/lib/dates.ts

@@ -18,6 +18,29 @@ export function formatShortDate(dateStr: string): string {
   });
 }
 
+/** Budget month M = the credit-card cycle ENDING on the 18th of M
+ * (matches get_cycle_range in the backend). After the 18th we are already
+ * in next month's cycle — including the Dec 19 → January-next-year wrap. */
+export function currentBudgetCycle(today = new Date()): {
+  year: number;
+  month: number;
+  start: Date;
+  end: Date;
+} {
+  let year = today.getFullYear();
+  let month = today.getMonth() + 1;
+  if (today.getDate() > 18) {
+    month += 1;
+    if (month === 13) {
+      month = 1;
+      year += 1;
+    }
+  }
+  const end = new Date(year, month - 1, 18);
+  const start = new Date(year, month - 2, 18);
+  return { year, month, start, end };
+}
+
 /** "hace 3 días" / "hace 2 horas" / "hace un momento" */
 export function formatRelativeAge(iso: string): string {
   const ms = Date.now() - new Date(iso).getTime();

frontend/src/lib/navigation.ts

@@ -0,0 +1,71 @@
+import {
+  BarChart3,
+  Calculator,
+  Droplets,
+  Home,
+  Landmark,
+  Layers,
+  PiggyBank,
+  RefreshCw,
+  Sparkles,
+  Telescope,
+  TrendingUp,
+  type LucideIcon,
+} from "lucide-react";
+
+/** Single source of truth for the sidebar nav and header breadcrumbs. */
+
+export interface NavItem {
+  to: string;
+  icon: LucideIcon;
+  label: string;
+}
+
+export interface NavSection {
+  label: string;
+  items: NavItem[];
+}
+
+export const navSections: NavSection[] = [
+  {
+    label: "General",
+    items: [
+      { to: "/", icon: Home, label: "Inicio" },
+      { 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" },
+    ],
+  },
+];
+
+/** "/" must match exactly — prefix-matching it would mark Inicio active everywhere. */
+export function isNavActive(to: string, pathname: string): boolean {
+  if (to === "/") return pathname === "/";
+  return pathname === to || pathname.startsWith(`${to}/`);
+}
+
+export function titleFor(pathname: string): string {
+  for (const section of navSections) {
+    for (const item of section.items) {
+      if (isNavActive(item.to, pathname)) return item.label;
+    }
+  }
+  return "WealthySmart";
+}

frontend/src/pages/Asistente.tsx

@@ -1,4 +1,11 @@
-import { CopilotChat, useConfigureSuggestions } from "@copilotkit/react-core/v2";
+import { useEffect, useRef } from "react";
+import { useLocation, useNavigate } from "react-router-dom";
+import {
+  CopilotChat,
+  useAgent,
+  useConfigureSuggestions,
+  useCopilotKit,
+} from "@copilotkit/react-core/v2";
 import { useCopilotAction } from "@copilotkit/react-core";
 import { Sparkles } from "lucide-react";
 import { SpendingSummaryCard, type SpendingSummaryArgs } from "@/components/chat/ChatCards";
@@ -16,6 +23,28 @@ const STATIC_SUGGESTIONS = {
 export default function Asistente() {
   useConfigureSuggestions(STATIC_SUGGESTIONS);
 
+  // A question typed on the Inicio dashboard arrives via router state:
+  // append it as a user message and run the agent once.
+  const location = useLocation();
+  const navigate = useNavigate();
+  const { agent } = useAgent({ agentId: "wealthysmart" });
+  const { copilotkit } = useCopilotKit();
+  const sentRef = useRef(false);
+  useEffect(() => {
+    const ask = (location.state as { ask?: string } | null)?.ask;
+    if (!ask || sentRef.current || !agent) return;
+    sentRef.current = true;
+    // Clear the state so back/refresh doesn't re-send the question.
+    navigate(location.pathname, { replace: true, state: null });
+    agent.addMessage({
+      id: crypto.randomUUID(),
+      role: "user",
+      content: ask,
+    });
+    void copilotkit.runAgent({ agent });
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [agent]);
+
   useCopilotAction({
     name: "render_spending_summary",
     description:
@@ -54,7 +83,9 @@ export default function Asistente() {
   });
 
   return (
-    <div className="flex flex-col h-[calc(100vh-105px)]">
+    // Fills the viewport via Layout's flex chain (SidebarInset > main >
+    // max-w wrapper are all min-h-0 flex columns) — no vh math.
+    <div className="flex flex-1 min-h-0 flex-col">
       <div className="mb-4">
         <h1 className="text-2xl font-bold tracking-tight flex items-center gap-2" style={{ fontFamily: "var(--font-heading)" }}>
           <Sparkles className="w-5 h-5 text-primary" />

frontend/src/pages/Budget.tsx

@@ -5,7 +5,10 @@ import { useQuery, useQueryClient } from '@tanstack/react-query';
 import { toast } from 'sonner';
 
 import api, { type Transaction } from '@/lib/api';
-import { MONTH_NAMES_ES as MONTH_NAMES } from '@/lib/dates';
+import {
+  MONTH_NAMES_ES as MONTH_NAMES,
+  MONTH_NAMES_ES_SHORT as MONTH_NAMES_SHORT,
+} from '@/lib/dates';
 import { useBudget } from '@/hooks/useBudget';
 import { Button } from '@/components/ui/button';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
@@ -22,6 +25,17 @@ const MAX_YEAR = 2030;
 
 export default function Budget() {
   const currentYear = Math.max(MIN_YEAR, new Date().getFullYear());
+  const location = useLocation();
+  const navigate = useNavigate();
+  // Proyecciones row clicks land here with the clicked period in the state.
+  const navState = location.state as
+    | { from?: string; year?: number; month?: number }
+    | null;
+  const cameFromProyecciones = navState?.from === 'proyecciones';
+  const initialYear =
+    navState?.year && navState.year >= MIN_YEAR && navState.year <= MAX_YEAR
+      ? navState.year
+      : currentYear;
   const {
     year,
     setYear,
@@ -35,12 +49,8 @@ export default function Budget() {
     updateItem,
     deleteItem,
     refresh,
-  } = useBudget(currentYear);
+  } = useBudget(initialYear, navState?.month);
   const queryClient = useQueryClient();
-  const location = useLocation();
-  const navigate = useNavigate();
-  const cameFromProyecciones =
-    (location.state as { from?: string } | null)?.from === 'proyecciones';
 
   const [subTab, setSubTab] = useState<'detail' | 'transactions'>('detail');
   const [txSearch, setTxSearch] = useState('');
@@ -79,6 +89,14 @@ export default function Budget() {
   });
   const transactions = txQuery.data ?? [];
 
+  // Make the period explicit: budget month M on the card tab = the billing
+  // cycle 18/(M-1) → 18/M; cash/transfers use the calendar month.
+  const cyclePrevMonth = selectedMonth === 1 ? 12 : selectedMonth - 1;
+  const cycleLabel =
+    txSource === 'CREDIT_CARD'
+      ? `Ciclo 18 ${MONTH_NAMES_SHORT[cyclePrevMonth].toLowerCase()} – 18 ${MONTH_NAMES_SHORT[selectedMonth].toLowerCase()}`
+      : `Mes de ${MONTH_NAMES[selectedMonth].toLowerCase()}`;
+
   const invalidateTransactionsAndBudget = useCallback(() => {
     queryClient.invalidateQueries({ queryKey: ['transactions'] });
     queryClient.invalidateQueries({ queryKey: ['installment-plans'] });
@@ -116,6 +134,7 @@ export default function Budget() {
             <Button
               variant="ghost"
               size="sm"
+              className="mr-4 text-muted-foreground"
               onClick={() => navigate('/proyecciones')}
               aria-label="Volver a Proyecciones"
             >
@@ -174,27 +193,7 @@ export default function Budget() {
               )}
             </TabsContent>
 
-            <TabsContent value="transactions" className="space-y-3 mt-4">
-              <div className="flex items-center justify-between gap-2">
-                <Tabs
-                  value={txSource}
-                  onValueChange={(v) => setTxSource(v as typeof txSource)}
-                >
-                  <TabsList>
-                    <TabsTrigger value="CREDIT_CARD">Tarjeta</TabsTrigger>
-                    <TabsTrigger value="CASH_AND_TRANSFER">Efectivo y Transferencias</TabsTrigger>
-                  </TabsList>
-                </Tabs>
-                <Button
-                  variant="outline"
-                  size="sm"
-                  onClick={() => window.open('/api/v1/transactions/export', '_blank')}
-                  title="Descargar todas las transacciones como CSV"
-                >
-                  <Download className="w-4 h-4 mr-2" aria-hidden="true" />
-                  CSV
-                </Button>
-              </div>
+            <TabsContent value="transactions" className="mt-4">
               {txQuery.isError ? (
                 <ErrorState
                   message="No se pudieron cargar las transacciones"
@@ -213,6 +212,29 @@ export default function Budget() {
                 emptyMessage={`Sin transacciones de ${txSource === 'CREDIT_CARD' ? 'tarjeta' : 'efectivo o transferencia'} en ${MONTH_NAMES[selectedMonth]}`}
                 onToggleDeferred={txSource === 'CREDIT_CARD' ? handleToggleDeferred : undefined}
                 onConvertTasaCero={txSource === 'CREDIT_CARD' ? setConvertTx : undefined}
+                summaryLabel={cycleLabel}
+                toolbarLeft={
+                  <Tabs
+                    value={txSource}
+                    onValueChange={(v) => setTxSource(v as typeof txSource)}
+                  >
+                    <TabsList>
+                      <TabsTrigger value="CREDIT_CARD">Tarjeta</TabsTrigger>
+                      <TabsTrigger value="CASH_AND_TRANSFER">Efectivo y Transferencias</TabsTrigger>
+                    </TabsList>
+                  </Tabs>
+                }
+                toolbarRight={
+                  <Button
+                    variant="outline"
+                    size="sm"
+                    onClick={() => window.open('/api/v1/transactions/export', '_blank')}
+                    title="Descargar todas las transacciones como CSV"
+                  >
+                    <Download className="w-4 h-4 mr-2" aria-hidden="true" />
+                    CSV
+                  </Button>
+                }
               />
               )}
             </TabsContent>

frontend/src/pages/Inicio.tsx

@@ -0,0 +1,353 @@
+import { useState } from "react";
+import { Link, useNavigate } from "react-router-dom";
+import { ArrowRight, Sparkles } from "lucide-react";
+import { useQuery } from "@tanstack/react-query";
+
+import {
+  getInstallmentPlans,
+  getMonthlyDetail,
+  getPensionFundSummary,
+  getRecentTransactions,
+} from "@/lib/api";
+import { formatAmount } from "@/lib/format";
+import {
+  MONTH_NAMES_ES_SHORT,
+  currentBudgetCycle,
+  formatShortDate,
+} from "@/lib/dates";
+import { cn } from "@/lib/utils";
+import { Button } from "@/components/ui/button";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+import { Skeleton } from "@/components/ui/skeleton";
+
+const CYCLE = currentBudgetCycle();
+
+function StatCardShell({
+  to,
+  ariaLabel,
+  children,
+}: {
+  to: string;
+  ariaLabel: string;
+  children: React.ReactNode;
+}) {
+  return (
+    <Link
+      to={to}
+      aria-label={ariaLabel}
+      className="block rounded-xl focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+    >
+      <Card className="h-full transition-colors hover:border-primary/40 cursor-pointer">
+        {children}
+      </Card>
+    </Link>
+  );
+}
+
+function StatValue({
+  value,
+  loading,
+  className,
+}: {
+  value: string | null;
+  loading: boolean;
+  className?: string;
+}) {
+  if (loading) return <Skeleton className="h-8 w-36" />;
+  return (
+    <span
+      data-sensitive
+      className={cn("text-2xl font-bold font-mono", className)}
+    >
+      {value ?? "—"}
+    </span>
+  );
+}
+
+function GastoDelCicloCard() {
+  const q = useQuery({
+    queryKey: ["budget", "month", CYCLE.year, CYCLE.month],
+    queryFn: () =>
+      getMonthlyDetail(CYCLE.year, CYCLE.month).then((r) => r.data),
+  });
+  const spend = q.data
+    ? q.data.actuals_by_source.reduce((sum, a) => sum + a.net, 0)
+    : null;
+  const balance = q.data?.net_balance ?? null;
+
+  return (
+    <StatCardShell to="/budget" ariaLabel="Ver presupuesto">
+      <CardHeader className="pb-2">
+        <CardTitle className="text-sm font-medium text-muted-foreground">
+          Gasto del ciclo
+        </CardTitle>
+        <CardDescription>
+          Ciclo al 18 {MONTH_NAMES_ES_SHORT[CYCLE.month].toLowerCase()}
+        </CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-1">
+        <StatValue
+          loading={q.isPending}
+          value={
+            q.isError ? null : spend !== null ? formatAmount(spend, "CRC") : null
+          }
+        />
+        {balance !== null && (
+          <p className="text-xs text-muted-foreground">
+            Balance proyectado:{" "}
+            <span
+              data-sensitive
+              className={cn(
+                "font-mono font-medium",
+                balance >= 0 ? "text-primary" : "text-destructive",
+              )}
+            >
+              {balance >= 0 ? "+" : "-"}
+              {formatAmount(balance, "CRC")}
+            </span>
+          </p>
+        )}
+        {q.isError && (
+          <p className="text-xs text-muted-foreground">
+            No se pudo cargar el ciclo.
+          </p>
+        )}
+      </CardContent>
+    </StatCardShell>
+  );
+}
+
+function ProximasCuotasCard() {
+  const q = useQuery({
+    queryKey: ["installment-plans"],
+    queryFn: () => getInstallmentPlans().then((r) => r.data),
+  });
+  const active = (q.data?.plans ?? []).filter(
+    (p) => !p.is_completed && p.next_cuota_date,
+  );
+  // One cuota per plan per cycle, so the sum of every active plan's next
+  // cuota is the load of the upcoming billing batch (next 19th). The last
+  // cuota absorbs BAC's rounding, so use it when it's the one pending.
+  const nextCuotaOf = (p: (typeof active)[number]) =>
+    p.cuotas_billed === p.num_installments - 1
+      ? p.last_installment_amount
+      : p.installment_amount;
+  const nextBatchTotal = active.reduce((s, p) => s + nextCuotaOf(p), 0);
+  const upcoming = [...active].sort(
+    (a, b) =>
+      new Date(a.next_cuota_date!).getTime() -
+      new Date(b.next_cuota_date!).getTime(),
+  );
+  const nextDate = upcoming[0]?.next_cuota_date;
+  const topThree = upcoming.slice(0, 3);
+
+  return (
+    <StatCardShell to="/financiamientos" ariaLabel="Ver financiamientos">
+      <CardHeader className="pb-2">
+        <CardTitle className="text-sm font-medium text-muted-foreground">
+          Próximas cuotas
+        </CardTitle>
+        <CardDescription>
+          {nextDate
+            ? `Tasa Cero · próximo cobro ${formatShortDate(nextDate)}`
+            : "Tasa Cero"}
+        </CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-2">
+        <StatValue
+          loading={q.isPending}
+          value={q.isError ? null : formatAmount(nextBatchTotal, "CRC")}
+        />
+        {topThree.length > 0 && (
+          <ul className="space-y-0.5 text-xs text-muted-foreground">
+            {topThree.map((p) => (
+              <li key={p.id} className="flex justify-between gap-2">
+                <span className="truncate">{p.merchant}</span>
+                <span data-sensitive className="font-mono shrink-0">
+                  {formatShortDate(p.next_cuota_date!)} ·{" "}
+                  {formatAmount(nextCuotaOf(p), p.currency)}
+                </span>
+              </li>
+            ))}
+          </ul>
+        )}
+        {q.data && (
+          <p className="text-xs text-muted-foreground">
+            Restante total:{" "}
+            <span data-sensitive className="font-mono font-medium">
+              {formatAmount(q.data.total_remaining, "CRC")}
+            </span>
+          </p>
+        )}
+      </CardContent>
+    </StatCardShell>
+  );
+}
+
+function PensionCard() {
+  const q = useQuery({
+    queryKey: ["pension-fund-summary"],
+    queryFn: () => getPensionFundSummary().then((r) => r.data),
+  });
+  const total = q.data
+    ? q.data.reduce((s, f) => s + f.saldo_final, 0)
+    : null;
+
+  return (
+    <StatCardShell to="/pensions" ariaLabel="Ver pensiones">
+      <CardHeader className="pb-2">
+        <CardTitle className="text-sm font-medium text-muted-foreground">
+          Pensión
+        </CardTitle>
+        <CardDescription>Saldo total de fondos</CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-2">
+        <StatValue
+          loading={q.isPending}
+          value={
+            q.isError ? null : total !== null ? formatAmount(total, "CRC") : null
+          }
+        />
+        {q.data && q.data.length > 0 && (
+          <ul className="space-y-0.5 text-xs text-muted-foreground">
+            {q.data.map((f) => (
+              <li key={f.fund} className="flex justify-between gap-2">
+                <span>{f.fund}</span>
+                <span data-sensitive className="font-mono">
+                  {formatAmount(f.saldo_final, "CRC")}
+                </span>
+              </li>
+            ))}
+          </ul>
+        )}
+      </CardContent>
+    </StatCardShell>
+  );
+}
+
+function AskAssistantCard() {
+  const [question, setQuestion] = useState("");
+  const navigate = useNavigate();
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    const ask = question.trim();
+    navigate("/asistente", ask ? { state: { ask } } : undefined);
+  };
+
+  return (
+    <Card>
+      <CardContent className="pt-6">
+        <form onSubmit={handleSubmit} className="flex items-center gap-3">
+          <Sparkles className="w-5 h-5 text-primary shrink-0" aria-hidden />
+          <Input
+            value={question}
+            onChange={(e) => setQuestion(e.target.value)}
+            placeholder="¿Cuánto gasté este ciclo?"
+            aria-label="Pregúntale al asistente"
+            className="flex-1"
+          />
+          <Button type="submit">Preguntar</Button>
+        </form>
+      </CardContent>
+    </Card>
+  );
+}
+
+function RecentTransactionsCard() {
+  const q = useQuery({
+    queryKey: ["transactions", "recent"],
+    queryFn: () => getRecentTransactions(5).then((r) => r.data),
+  });
+
+  return (
+    <Card>
+      <CardHeader className="flex flex-row items-center justify-between pb-2">
+        <CardTitle className="text-sm font-medium text-muted-foreground">
+          Últimas transacciones
+        </CardTitle>
+        <Link
+          to="/budget"
+          className="flex items-center gap-1 text-xs text-primary hover:underline focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring rounded"
+        >
+          Ver todo
+          <ArrowRight className="w-3 h-3" aria-hidden />
+        </Link>
+      </CardHeader>
+      <CardContent>
+        {q.isPending ? (
+          <div className="space-y-2">
+            {Array.from({ length: 5 }, (_, i) => (
+              <Skeleton key={i} className="h-6 w-full" />
+            ))}
+          </div>
+        ) : q.isError ? (
+          <p className="text-sm text-muted-foreground">
+            No se pudieron cargar las transacciones.
+          </p>
+        ) : (
+          <ul className="divide-y divide-border">
+            {(q.data ?? []).map((tx) => (
+              <li
+                key={tx.id}
+                className="flex items-center justify-between gap-3 py-2 text-sm"
+              >
+                <span className="truncate">{tx.merchant}</span>
+                <span className="flex items-center gap-3 shrink-0">
+                  <span className="text-xs text-muted-foreground">
+                    {formatShortDate(tx.date)}
+                  </span>
+                  <span
+                    data-sensitive
+                    className={cn(
+                      "font-mono",
+                      tx.transaction_type !== "COMPRA" && "text-primary",
+                    )}
+                  >
+                    {tx.transaction_type === "COMPRA" ? "-" : "+"}
+                    {formatAmount(tx.amount, tx.currency)}
+                  </span>
+                </span>
+              </li>
+            ))}
+          </ul>
+        )}
+      </CardContent>
+    </Card>
+  );
+}
+
+export default function Inicio() {
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1
+          className="text-2xl font-bold tracking-tight"
+          style={{ fontFamily: "var(--font-heading)" }}
+        >
+          Inicio
+        </h1>
+        <p className="text-sm text-muted-foreground">
+          Tu panorama financiero de hoy.
+        </p>
+      </div>
+
+      <div className="grid gap-4 md:grid-cols-3">
+        <GastoDelCicloCard />
+        <ProximasCuotasCard />
+        <PensionCard />
+      </div>
+
+      <AskAssistantCard />
+
+      <RecentTransactionsCard />
+    </div>
+  );
+}

frontend/src/pages/Login.tsx

@@ -23,7 +23,7 @@ export default function LoginPage() {
     try {
       await login(username, password);
       setAuthenticated(true);
-      navigate("/asistente", { replace: true });
+      navigate("/", { replace: true });
     } catch {
       setError("Invalid credentials");
     } finally {

frontend/src/pages/Pensions.tsx

@@ -84,7 +84,17 @@ interface TooltipEntry {
 
 // ─── Constants ────────────────────────────────────────────────────────────────
 
-const CURRENT_AGE = 30;
+const BIRTH_DATE = new Date(1988, 7, 29); // 29 de agosto de 1988
+
+function computeCurrentAge(): number {
+  const now = new Date();
+  const hadBirthdayThisYear =
+    now.getMonth() > BIRTH_DATE.getMonth() ||
+    (now.getMonth() === BIRTH_DATE.getMonth() && now.getDate() >= BIRTH_DATE.getDate());
+  return now.getFullYear() - BIRTH_DATE.getFullYear() - (hadBirthdayThisYear ? 0 : 1);
+}
+
+const CURRENT_AGE = computeCurrentAge();
 
 const FUND_KEYS: FundKey[] = ['FCL', 'ROP', 'VOL'];
 
@@ -99,7 +109,7 @@ const FUNDS_DEFAULT: Record<FundKey, FundDef> = {
     annualRate: 7.5,
     isDividend: false,
     withdrawalRule: 'Retirable cada 5 años o al cambio de empleo',
-    defaultTargetAge: 35,
+    defaultTargetAge: CURRENT_AGE + 5,
   },
   ROP: {
     key: 'ROP',
@@ -255,7 +265,7 @@ const EMPTY_SNAPSHOTS: PensionSnapshot[] = [];
 export default function Pensions() {
   const [visibleFunds, setVisibleFunds] = useState<Set<FundKey>>(new Set(FUND_KEYS));
   const [projections, setProjections] = useState<Record<FundKey, ProjectionState>>({
-    FCL: { contribution: 150_000, rate: 7.5, targetAge: 35 },
+    FCL: { contribution: 150_000, rate: 7.5, targetAge: CURRENT_AGE + 5 },
     ROP: { contribution: 120_000, rate: 6.0, targetAge: 65 },
     VOL: { contribution: 400_000, rate: 8.0, targetAge: 57 },
   });

frontend/src/pages/Proyecciones.tsx

@@ -99,7 +99,9 @@ export default function Proyecciones() {
               year={year}
               onSelectMonth={(m) => {
                 setSelectedMonth(m);
-                navigate('/budget', { state: { from: 'proyecciones' } });
+                navigate('/budget', {
+                  state: { from: 'proyecciones', year, month: m },
+                });
               }}
               onSaveOverride={async (month, value) => {
                 await saveBalanceOverride(year, month, value);