perf: switch past events and static pages to full SSG

- Wrap fetchPastEvents with React cache() to deduplicate API calls
  during build (generateStaticParams + PastEvents component)
- Remove revalidate=3600 from past events pages (content doesn't change)
- Remove revalidate=3600 from event detail pages (pre-generated at build)
- Remove revalidate=3600 from MDX pages (no external data)
- Keep ISR only on homepage (displays upcoming event)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Slashgear

app/a-propos/page.tsx

@@ -5,7 +5,6 @@ import Content from './content.mdx';
 export default function APropos() {
   return <Content />;
 }
-export const revalidate = 3600;
 const title = 'LyonJS | À propos';
 const description =
   "Qu'est-ce que LyonJS, comment le meetup est organisé ? Comment participer ? Qui sont les organisateurs ?";

app/budget-et-financement/page.tsx

@@ -5,7 +5,6 @@ import Content from './content.mdx';
 export default function BudgetEtFinancement() {
   return <Content />;
 }
-export const revalidate = 3600;
 const title = 'LyonJS | Budget et financement de l’association';
 const description = "Quelles sont les dépenses de l'association LyonJS, comment elle se finance";
 

app/devenir-sponsor/page.tsx

@@ -9,7 +9,6 @@ export default function BecomeSponsor() {
     </main>
   );
 }
-export const revalidate = 3600;
 const title = 'LyonJS | Devenir sponsor';
 const description = 'Vous souhaitez sponsoriser un événement de LyonJS, voici toutes les informations nécessaires';
 

app/evenement/[slug]/page.tsx

@@ -8,8 +8,6 @@ import { fetchPastEvents } from '../../../modules/meetup/queries/past-events.api
 import { notFound } from 'next/navigation';
 import { Metadata } from 'next';
 
-export const revalidate = 3600;
-
 export async function generateStaticParams() {
   const events = await fetchPastEvents();
   return events.map((event) => ({ slug: slugEventTitle(event) }));

app/evenements-precedents/[year]/page.tsx

@@ -3,7 +3,6 @@ import React from 'react';
 import { Metadata } from 'next';
 import { PastEvents } from './pastEvents';
 import { fetchPastEvents } from '../../../modules/meetup/queries/past-events.api';
-export const revalidate = 3600;
 const DEFAULT_YEAR = `${new Date().getFullYear()}`;
 
 export default async function PastEventsPage({ params }: { params: Promise<{ year?: string }> }) {

app/lyonjs-100/page.tsx

@@ -5,7 +5,6 @@ import Content from './content.mdx';
 export default function LyonJS100() {
   return <Content />;
 }
-export const revalidate = 3600;
 const title = 'LyonJS | LyonJS 💯';
 const description =
   "Qu'est ce que le LyonJS 100 ? Comment participer à la journée de conférence ? Les replays des conférences";

modules/meetup/queries/past-events.api.ts

@@ -1,3 +1,4 @@
+import { cache } from 'react';
 import { Event } from '../../event/types';
 import { gql } from 'graphql-request';
 import { client, Edges, LYONJS_MEETUP_ID } from '../api';
@@ -38,9 +39,9 @@ const query = gql`
   }
 `;
 
-export const fetchPastEvents = async (): Promise<Array<Event>> => {
+export const fetchPastEvents = cache(async (): Promise<Array<Event>> => {
   const meetupEventsResponse = await client.request<ResponseType>(query, { id: LYONJS_MEETUP_ID });
   const pastEvents = meetupEventsResponse?.group?.events?.edges.map((it) => it.node).toReversed() || [];
 
   return pastEvents;
-};
+});