refactor: streamline imports in AsignaturaPreviewCard and $planId components; update animation duration in styles

src/routes/_authenticated/plan/$planId.tsx

@@ -1,4 +1,4 @@
-import { createFileRoute, Link, useRouter } from "@tanstack/react-router"
+import { createFileRoute, Link } from "@tanstack/react-router"
 import { useEffect, useMemo, useRef, useState } from "react"
 import * as Icons from "lucide-react"
 import { useMutation, useQueryClient, useSuspenseQuery } from "@tanstack/react-query"
@@ -9,15 +9,15 @@ import { AcademicSections, planKeys } from "@/components/planes/academic-section
 import { GradientMesh } from "../../../components/planes/GradientMesh"
 import { asignaturaExtraOptions, asignaturaKeys, asignaturasCountOptions, asignaturasPreviewOptions, planByIdOptions, type AsignaturaLite, type PlanFull } from "@/components/planes/planQueries"
 import { softAccentStyle } from "@/components/planes/planHelpers"
-import { Dialog, DialogContent, DialogDescription, DialogTitle } from "@radix-ui/react-dialog"
+import { Dialog, DialogContent, DialogDescription, DialogTitle } from "@/components/ui/dialog"
 import { DialogFooter, DialogHeader } from "@/components/ui/dialog"
 import { Button } from "@/components/ui/button"
 import { Input } from "@/components/ui/input"
-import { Label } from "@radix-ui/react-label"
+import { Label } from "@/components/ui/label"
 import confetti from "canvas-confetti"
 import { Textarea } from "@/components/ui/textarea"
 import { AuroraButton } from "@/components/effect/aurora-button"
-import { Tabs, TabsContent, TabsList, TabsTrigger } from "@radix-ui/react-tabs"
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
 
 type LoaderData = { planId: string }
 
@@ -37,7 +37,6 @@ export const Route = createFileRoute("/_authenticated/plan/$planId")({
 
 // ...existing code...
 function RouteComponent() {
-  const router = useRouter()
   const qc = useQueryClient()
   const { planId } = Route.useLoaderData() as LoaderData
   const auth = useSupabaseAuth()

src/routes/index.tsx

@@ -1,22 +1,34 @@
 import { createFileRoute, Link } from '@tanstack/react-router'
 import { Button } from "@/components/ui/button"
-import '../App.css'
+import { useSupabaseAuth } from "@/auth/supabase"
 
 export const Route = createFileRoute('/')({
   component: App
 })
-
 function App() {
+
+  const auth = useSupabaseAuth()
+  const isAuth = !!auth.user
   return (
     <div className="min-h-screen flex flex-col bg-gradient-to-br from-white via-slate-200 to-primary">
       {/* Navbar */}
       <header className="flex items-center justify-between px-10 py-6 border-b border-slate-700/50">
         <h1 className="text-2xl font-mono tracking-tight">Acad-IA</h1>
-        <Link to="/login" search={{ redirect: '/planes' }}>
-          <Button variant="outline" className="border-slate-500 hover:bg-slate-700/50">
-            Iniciar sesión
-          </Button>
-        </Link>
+        {isAuth ? (
+          <Link to="/planes">
+            <Button className="border-slate-500 hover:bg-slate-700/50 relative overflow-hidden">
+              <span className="absolute inset-0 animate-aurora" />
+
+              Comenzar
+            </Button>
+          </Link>
+        ) : (
+          <Link to="/login" search={{ redirect: '/planes' }}>
+            <Button variant="outline" className="border-slate-500 hover:bg-slate-700/50">
+              Iniciar sesión
+            </Button>
+          </Link>
+        )}
       </header>
 
       {/* Hero */}