src/web/src/components/layout/AppHeader.tsx

@@ -0,0 +1,97 @@
+import { Menu, LogOut, User } from 'lucide-react'
+import { useNavigate } from 'react-router-dom'
+import {
+  Sheet,
+  SheetContent,
+  SheetHeader,
+  SheetTitle,
+  SheetTrigger,
+} from '@/components/ui/sheet'
+import { Button } from '@/components/ui/button'
+import { Avatar, AvatarFallback } from '@/components/ui/avatar'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu'
+import { ThemeToggle } from '@/components/layout/ThemeToggle'
+import { SidebarNav } from '@/components/layout/AppSidebar'
+import { useAuthStore } from '@/stores/authStore'
+
+export function AppHeader() {
+  const navigate = useNavigate()
+  const user = useAuthStore((s) => s.user)
+  const logout = useAuthStore((s) => s.logout)
+
+  const initials = user?.nombre
+    ? user.nombre
+        .split(' ')
+        .slice(0, 2)
+        .map((n) => n[0])
+        .join('')
+        .toUpperCase()
+    : 'U'
+
+  function handleLogout() {
+    logout()
+    void navigate('/login')
+  }
+
+  return (
+    <header className="flex h-14 items-center gap-4 border-b border-border bg-background px-4">
+      {/* Mobile sidebar trigger */}
+      <Sheet>
+        <SheetTrigger asChild>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="lg:hidden"
+            aria-label="Abrir menú"
+          >
+            <Menu className="h-5 w-5" />
+          </Button>
+        </SheetTrigger>
+        <SheetContent side="left" className="p-0 w-64">
+          <SheetHeader className="sr-only">
+            <SheetTitle>Navegación</SheetTitle>
+          </SheetHeader>
+          <SidebarNav />
+        </SheetContent>
+      </Sheet>
+
+      {/* Spacer */}
+      <div className="flex-1" />
+
+      {/* Right actions */}
+      <ThemeToggle />
+
+      <DropdownMenu>
+        <DropdownMenuTrigger asChild>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="rounded-full"
+            aria-label="Menú de usuario"
+          >
+            <Avatar className="h-8 w-8">
+              <AvatarFallback className="text-xs">{initials}</AvatarFallback>
+            </Avatar>
+          </Button>
+        </DropdownMenuTrigger>
+        <DropdownMenuContent align="end" className="w-48">
+          <DropdownMenuItem disabled>
+            <User className="mr-2 h-4 w-4" />
+            Mi perfil
+          </DropdownMenuItem>
+          <DropdownMenuSeparator />
+          <DropdownMenuItem onClick={handleLogout}>
+            <LogOut className="mr-2 h-4 w-4" />
+            Cerrar sesión
+          </DropdownMenuItem>
+        </DropdownMenuContent>
+      </DropdownMenu>
+    </header>
+  )
+}

src/web/src/components/layout/AppSidebar.tsx

@@ -0,0 +1,85 @@
+import { Link, useLocation } from 'react-router-dom'
+import {
+  LayoutDashboard,
+  ShoppingCart,
+  Calculator,
+  Zap,
+  Settings,
+} from 'lucide-react'
+import { cn } from '@/lib/utils'
+import { Badge } from '@/components/ui/badge'
+
+interface NavItem {
+  label: string
+  href: string
+  icon: React.ElementType
+  disabled?: boolean
+}
+
+const navItems: NavItem[] = [
+  { label: 'Dashboard', href: '/', icon: LayoutDashboard },
+  { label: 'Ventas', href: '/ventas', icon: ShoppingCart, disabled: true },
+  { label: 'Tasación', href: '/tasacion', icon: Calculator, disabled: true },
+  {
+    label: 'Integraciones',
+    href: '/integraciones',
+    icon: Zap,
+    disabled: true,
+  },
+  {
+    label: 'Administración',
+    href: '/administracion',
+    icon: Settings,
+    disabled: true,
+  },
+]
+
+export function SidebarNav() {
+  const { pathname } = useLocation()
+
+  return (
+    <aside className="flex h-full flex-col bg-background border-r border-border">
+      {/* Brand */}
+      <div className="flex h-14 items-center px-4 border-b border-border">
+        <span className="text-base font-semibold tracking-tight text-foreground">
+          SIG-CM 2.0
+        </span>
+      </div>
+
+      {/* Nav */}
+      <nav className="flex-1 overflow-y-auto py-4 px-2 space-y-1">
+        {navItems.map((item) => {
+          const Icon = item.icon
+          const isActive = pathname === item.href && !item.disabled
+
+          return item.disabled ? (
+            <div
+              key={item.href}
+              className="flex items-center gap-3 rounded-md px-3 py-2 text-sm text-muted-foreground cursor-not-allowed opacity-60"
+            >
+              <Icon className="h-4 w-4 shrink-0" />
+              <span className="flex-1">{item.label}</span>
+              <Badge variant="secondary" className="text-xs">
+                Próximamente
+              </Badge>
+            </div>
+          ) : (
+            <Link
+              key={item.href}
+              to={item.href}
+              className={cn(
+                'flex items-center gap-3 rounded-md px-3 py-2 text-sm transition-colors hover:bg-accent hover:text-accent-foreground',
+                isActive
+                  ? 'bg-accent text-accent-foreground font-medium'
+                  : 'text-muted-foreground',
+              )}
+            >
+              <Icon className="h-4 w-4 shrink-0" />
+              <span>{item.label}</span>
+            </Link>
+          )
+        })}
+      </nav>
+    </aside>
+  )
+}

src/web/src/components/layout/ThemeToggle.tsx

@@ -0,0 +1,30 @@
+import { Moon, Sun } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { useTheme } from '@/hooks/useTheme'
+
+export function ThemeToggle() {
+  const { resolvedTheme, setTheme } = useTheme()
+
+  function toggle() {
+    setTheme(resolvedTheme === 'dark' ? 'light' : 'dark')
+  }
+
+  return (
+    <Button
+      variant="ghost"
+      size="icon"
+      onClick={toggle}
+      aria-label={
+        resolvedTheme === 'dark'
+          ? 'Cambiar a modo claro'
+          : 'Cambiar a modo oscuro'
+      }
+    >
+      {resolvedTheme === 'dark' ? (
+        <Sun className="h-5 w-5" />
+      ) : (
+        <Moon className="h-5 w-5" />
+      )}
+    </Button>
+  )
+}

src/web/src/hooks/useTheme.ts

@@ -0,0 +1,42 @@
+import { useEffect, useState } from 'react'
+
+export type Theme = 'light' | 'dark' | 'system'
+
+const STORAGE_KEY = 'theme'
+
+function getSystemTheme(): 'light' | 'dark' {
+  return window.matchMedia('(prefers-color-scheme: dark)').matches
+    ? 'dark'
+    : 'light'
+}
+
+function applyTheme(theme: Theme) {
+  const resolved = theme === 'system' ? getSystemTheme() : theme
+  const root = document.documentElement
+  root.classList.remove('light', 'dark')
+  root.classList.add(resolved)
+}
+
+export function useTheme() {
+  const [theme, setThemeState] = useState<Theme>(() => {
+    const stored = localStorage.getItem(STORAGE_KEY) as Theme | null
+    if (stored === 'light' || stored === 'dark' || stored === 'system') {
+      return stored
+    }
+    return 'system'
+  })
+
+  const resolvedTheme: 'light' | 'dark' =
+    theme === 'system' ? getSystemTheme() : theme
+
+  useEffect(() => {
+    applyTheme(theme)
+  }, [theme])
+
+  function setTheme(next: Theme) {
+    localStorage.setItem(STORAGE_KEY, next)
+    setThemeState(next)
+  }
+
+  return { theme, setTheme, resolvedTheme }
+}

src/web/src/layouts/ProtectedLayout.tsx

@@ -1,4 +1,6 @@
 import type { ReactNode } from 'react'
+import { AppHeader } from '@/components/layout/AppHeader'
+import { SidebarNav } from '@/components/layout/AppSidebar'
 
 interface ProtectedLayoutProps {
   children: ReactNode
@@ -6,8 +8,17 @@ interface ProtectedLayoutProps {
 
 export function ProtectedLayout({ children }: ProtectedLayoutProps) {
   return (
-    <div className="min-h-screen bg-white">
+    <div className="flex h-svh overflow-hidden bg-background text-foreground">
-      {children}
+      {/* Desktop sidebar */}
+      <div className="hidden lg:flex lg:w-60 lg:flex-col lg:shrink-0">
+        <SidebarNav />
+      </div>
+
+      {/* Main column */}
+      <div className="flex flex-1 flex-col min-w-0 overflow-hidden">
+        <AppHeader />
+        <main className="flex-1 overflow-y-auto p-6">{children}</main>
+      </div>
     </div>
   )
 }

src/web/src/layouts/PublicLayout.tsx

@@ -6,7 +6,7 @@ interface PublicLayoutProps {
 
 export function PublicLayout({ children }: PublicLayoutProps) {
   return (
-    <div className="min-h-screen bg-gray-50">
+    <div className="min-h-svh bg-muted/40 flex items-center justify-center p-4">
       {children}
     </div>
   )

src/web/src/pages/HomePage.tsx

@@ -1,8 +1,109 @@
+import {
+  TrendingUp,
+  Calculator,
+  Zap,
+  Settings,
+  LayoutDashboard,
+} from 'lucide-react'
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardFooter,
+  CardHeader,
+  CardTitle,
+} from '@/components/ui/card'
+import { Badge } from '@/components/ui/badge'
+import { useAuthStore } from '@/stores/authStore'
+
+interface ModuleCard {
+  title: string
+  description: string
+  icon: React.ElementType
+  available: boolean
+}
+
+const modules: ModuleCard[] = [
+  {
+    title: 'Dashboard',
+    description: 'Vista general del sistema y métricas principales.',
+    icon: LayoutDashboard,
+    available: true,
+  },
+  {
+    title: 'Ventas',
+    description: 'Gestión de ventas, presupuestos y seguimiento de clientes.',
+    icon: TrendingUp,
+    available: false,
+  },
+  {
+    title: 'Tasación',
+    description: 'Herramientas de valuación y tasación de propiedades.',
+    icon: Calculator,
+    available: false,
+  },
+  {
+    title: 'Integraciones',
+    description: 'Conectores con portales inmobiliarios y servicios externos.',
+    icon: Zap,
+    available: false,
+  },
+  {
+    title: 'Administración',
+    description: 'Gestión de usuarios, roles y configuración del sistema.',
+    icon: Settings,
+    available: false,
+  },
+]
+
 export function HomePage() {
+  const user = useAuthStore((s) => s.user)
+
   return (
-    <div className="p-8">
+    <div className="space-y-6">
-      <h1 className="text-2xl font-semibold text-gray-900">Dashboard</h1>
+      {/* Welcome */}
-      <p className="mt-2 text-gray-600">Bienvenido al SIG-CM2.</p>
+      <div>
+        <h1 className="text-2xl font-semibold tracking-tight text-foreground">
+          Panel principal
+        </h1>
+        <p className="mt-1 text-sm text-muted-foreground">
+          {user?.nombre
+            ? `Bienvenido, ${user.nombre}. Seleccioná un módulo para comenzar.`
+            : 'Bienvenido al SIG-CM 2.0. Seleccioná un módulo para comenzar.'}
+        </p>
+      </div>
+
+      {/* Module grid */}
+      <div className="grid grid-cols-1 gap-4 md:grid-cols-2 xl:grid-cols-3">
+        {modules.map((mod) => {
+          const Icon = mod.icon
+          return (
+            <Card
+              key={mod.title}
+              className={
+                mod.available ? 'hover:shadow-md transition-shadow' : 'opacity-75'
+              }
+            >
+              <CardHeader className="pb-2">
+                <div className="flex items-center gap-2">
+                  <Icon className="h-5 w-5 text-muted-foreground" />
+                  <CardTitle className="text-base">{mod.title}</CardTitle>
+                </div>
+              </CardHeader>
+              <CardContent>
+                <CardDescription>{mod.description}</CardDescription>
+              </CardContent>
+              <CardFooter>
+                {mod.available ? (
+                  <Badge>Disponible</Badge>
+                ) : (
+                  <Badge variant="secondary">Próximamente</Badge>
+                )}
+              </CardFooter>
+            </Card>
+          )
+        })}
+      </div>
     </div>
   )
 }