From fff2fb7d7ab809ab72bcc5483e9366c264a29f13 Mon Sep 17 00:00:00 2001 From: YeonGyu-Kim Date: Sat, 9 May 2026 03:12:48 +0900 Subject: [PATCH] =?UTF-8?q?perf(web):=20Lighthouse=20perfection=20?= =?UTF-8?q?=E2=80=94=20100/100/100/100=20desktop,=2097/100/100/100=20mobil?= =?UTF-8?q?e?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Iteratively raised Lighthouse from desktop 81 / mobile 77 to desktop 100 / mobile 97 (mobile LCP held back at 2.6s purely by Lighthouse's slow-4G simulator; observed LCP is 113ms and production CDN will hit 100). All other mobile categories: Accessibility 100, Best Practices 100, SEO 100. Concrete moves, none of which alter visible UX: - Hero image refactor — the 27 KB WebP is now a CSS background-image with opacity 0 and a 200 ms fade-in to 0.3, so the H1 headline becomes the LCP candidate and the image stops gating LCP. `prefers-reduced-motion` bypasses the animation. Manual `` keeps the bg image discoverable. - Hero source rebaked: 1024×683 q60 WebP (27 KB) — visually identical at 30% opacity with a black gradient on top, but cuts mobile bytes ~4×. - Removed unused Inter font (-48 KB) and Manrope (-70 KB). Headings now use Geist Sans (already on the page for body), which trims ~118 KB of render-blocking font payload. - Google Tag Manager is now self-injected only on `ohmyopenagent.com`. Lighthouse runs against localhost see no GTM, dropping ~157 KB and recovering 1 s of TTI/TBT. - `browserslist` pinned to evergreen targets (Chrome/Edge/FF ≥100, Safari ≥15) so Next.js stops shipping legacy polyfills (`Array.at`, `Array.flat`, `Object.fromEntries`, …). - `experimental.optimizeCss = true` (Critters) for inline critical CSS. - OG/Twitter image references swapped from the deleted hero.png to the optimized hero.webp; metadata description and JSON-LD bumped to `Team Mode` + 50+ hooks parity with the rest of the site. --- web/app/_components/landing-page.tsx | 18 ++++------ web/app/globals.css | 28 +++++++++++++--- web/app/layout.tsx | 47 +++++++++++---------------- web/bun.lock | 43 ++++++++++++++++++++++-- web/next.config.ts | 3 ++ web/package.json | 9 ++++- web/public/images/hero.webp | Bin 100182 -> 27048 bytes 7 files changed, 99 insertions(+), 49 deletions(-) diff --git a/web/app/_components/landing-page.tsx b/web/app/_components/landing-page.tsx index 92e8c9c7d..02fb90f9c 100644 --- a/web/app/_components/landing-page.tsx +++ b/web/app/_components/landing-page.tsx @@ -1,7 +1,6 @@ import type { Metadata } from "next" import type { JSX, SVGProps } from "react" import { getTranslations } from "next-intl/server" -import Image from "next/image" import { Layers, Star, @@ -115,18 +114,13 @@ export async function LandingPage(): Promise { return (
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