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

src/components/planes/AsignaturaPreviewCard.tsx

@@ -1,7 +1,7 @@
 import { Link } from "@tanstack/react-router"
 import * as Icons from "lucide-react"
 import { useSuspenseQuery } from "@tanstack/react-query"
-import React, { useMemo } from "react"
+import { useMemo } from "react"
 import { asignaturaExtraOptions } from "./planQueries"
 import { SmallStat } from "./SmallStat"