Se crea funcionalidad de exportar pdf desde front y generar historial de version de cambios se agrego una libreri jspdf

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

@@ -20,6 +20,7 @@ import { AuroraButton } from "@/components/effect/aurora-button"
 import { DeletePlanButton } from "@/components/planes/DeletePlan"
 import { AddAsignaturaButton } from "@/components/planes/AddAsignaturaButton"
 import { DescargarPdfButton } from "@/components/planes/GenerarPdfButton"
+import { DownloadPlanPDF } from "@/components/planes/DownloadPlanPDF"
 
 type LoaderData = { plan: PlanFull; asignaturas: AsignaturaLite[] }
 
@@ -105,7 +106,8 @@ function RouteComponent() {
             {/* <div className='flex gap-2'> */}
               <EditPlanButton plan={plan} />
               <AdjustAIButton plan={plan} />
-              <DescargarPdfButton planId={plan.id} opcion="plan" />
+              {/* <DescargarPdfButton planId={plan.id} opcion="plan" /> */}
+              <DownloadPlanPDF plan={plan} />
               <DescargarPdfButton planId={plan.id} opcion="asignaturas" />
               <DeletePlanButton planId={plan.id} />
             {/* </div> */}
@@ -203,33 +205,77 @@ function StatCard({ label, value = "—", Icon = Icons.Info, accent, className =
 
 /* ===== Editar ===== */
 function EditPlanButton({ plan }: { plan: PlanFull }) {
+  const auth = useSupabaseAuth()
   const [open, setOpen] = useState(false)
   const [form, setForm] = useState<Partial<PlanFull>>({})
   const [saving, setSaving] = useState(false)
   const qc = useQueryClient()
 
+  // Función para comparar valores y generar diffs tipo JSON Patch
+  function generateDiff(oldData: PlanFull, newData: Partial<PlanFull>) {
+    const changes: any[] = []
+    for (const key of Object.keys(newData)) {
+      const oldValue = (oldData as any)[key]
+      const newValue = (newData as any)[key]
+      if (newValue !== undefined && newValue !== oldValue) {
+        changes.push({
+          op: "replace",
+          path: `/${key}`,
+          from: oldValue,
+          value: newValue
+        })
+      }
+    }
+    return changes
+  }
+
   const mutation = useMutation({
     mutationFn: async (payload: Partial<PlanFull>) => {
-      const { error } = await supabase.from('plan_estudios').update({
-        nombre: payload.nombre ?? plan.nombre,
-        nivel: payload.nivel ?? plan.nivel,
-        duracion: payload.duracion ?? plan.duracion,
-        total_creditos: payload.total_creditos ?? plan.total_creditos,
-      }).eq('id', plan.id)
+      // 1️⃣ Generar las diferencias antes del update
+      const diff = generateDiff(plan, payload)
+
+      // 2️⃣ Guardar respaldo (solo si hay cambios)
+      if (diff.length > 0) {
+        const { error: backupError } = await supabase.from("historico_cambios").insert({
+          id_plan_estudios: plan.id,
+          json_cambios: diff, // jsonb
+          user_id:auth.user?.id,
+          created_at: new Date().toISOString()
+        })
+        if (backupError) throw backupError
+      }
+
+      // 3️⃣ Actualizar el plan principal
+      const { error } = await supabase
+        .from("plan_estudios")
+        .update({
+          nombre: payload.nombre ?? plan.nombre,
+          nivel: payload.nivel ?? plan.nivel,
+          duracion: payload.duracion ?? plan.duracion,
+          total_creditos: payload.total_creditos ?? plan.total_creditos,
+        })
+        .eq("id", plan.id)
+
       if (error) throw error
     },
+
     onMutate: async (payload) => {
       await qc.cancelQueries({ queryKey: planKeys.byId(plan.id) })
       const prev = qc.getQueryData<PlanFull>(planKeys.byId(plan.id))
-      qc.setQueryData<PlanFull>(planKeys.byId(plan.id), (old) => old ? { ...old, ...payload } as PlanFull : old as any)
+      qc.setQueryData<PlanFull>(
+        planKeys.byId(plan.id),
+        (old) => (old ? { ...old, ...payload } as PlanFull : old as any)
+      )
       return { prev }
     },
+
     onError: (_e, _vars, ctx) => {
       if (ctx?.prev) qc.setQueryData(planKeys.byId(plan.id), ctx.prev)
     },
+
     onSettled: async () => {
       await qc.invalidateQueries({ queryKey: planKeys.byId(plan.id) })
-    }
+    },
   })
 
   async function save() {