diff --git a/packages/web/app/[locale]/layout.tsx b/packages/web/app/[locale]/layout.tsx
index 80f2cfaee..f16984d36 100644
--- a/packages/web/app/[locale]/layout.tsx
+++ b/packages/web/app/[locale]/layout.tsx
@@ -1,5 +1,5 @@
 import type { Metadata } from "next"
-import type { JSX } from "react"
+import type { JSX, ReactNode } from "react"
 import { notFound } from "next/navigation"
 import { hasLocale } from "next-intl"
 import { setRequestLocale } from "next-intl/server"
@@ -8,10 +8,10 @@ import { routing } from "@/i18n/routing"
 
 export const metadata: Metadata = {
   description:
-    "Meet Sisyphus: The batteries-included agent that codes like you. Multi-model orchestration, background agents, 40+ lifecycle hooks.",
+    "Meet Sisyphus: The batteries-included agent that codes like you. Multi-model orchestration, background agents, 54+ lifecycle hooks.",
 }
 
-export function generateStaticParams() {
+export function generateStaticParams(): Array<{ readonly locale: string }> {
   return routing.locales.map((locale) => ({ locale }))
 }
 
@@ -19,7 +19,7 @@ export default async function LocaleLayout({
   children,
   params,
 }: {
-  children: React.ReactNode
+  children: ReactNode
   params: Promise<{ locale: string }>
 }): Promise<JSX.Element> {
   const { locale } = await params
diff --git a/packages/web/components/footer.tsx b/packages/web/components/footer.tsx
index 554a50aba..9f671f06e 100644
--- a/packages/web/components/footer.tsx
+++ b/packages/web/components/footer.tsx
@@ -1,7 +1,8 @@
+import type { JSX } from "react"
 import { getTranslations } from "next-intl/server"
 import { Link } from "@/i18n/routing"
 
-export async function Footer({ locale }: { locale?: string } = {}) {
+export async function Footer({ locale }: { readonly locale?: string } = {}): Promise<JSX.Element> {
   const t = locale
     ? await getTranslations({ locale, namespace: "footer" })
     : await getTranslations("footer")
@@ -27,7 +28,7 @@ export async function Footer({ locale }: { locale?: string } = {}) {
               {t("github")}
             </a>
             <a
-              href="https://discord.gg/indentcorp"
+              href="https://discord.gg/PUwSMR9XNk"
               target="_blank"
               rel="noopener noreferrer"
               className="transition-colors hover:text-cyan-400"
diff --git a/packages/web/components/landing/install-command.tsx b/packages/web/components/landing/install-command.tsx
index 7f59bf9b1..32d62737d 100644
--- a/packages/web/components/landing/install-command.tsx
+++ b/packages/web/components/landing/install-command.tsx
@@ -27,7 +27,7 @@ export function InstallCommand({ command }: { command: string }) {
         <Button
           variant="ghost"
           size="icon"
-          className="h-8 w-8 text-zinc-400 hover:text-white"
+          className="h-11 w-11 text-zinc-400 hover:text-white"
           onClick={copyCommand}
           aria-label="Copy install command"
         >
diff --git a/packages/web/components/nav-header.tsx b/packages/web/components/nav-header.tsx
index 39ee438aa..057a60fef 100644
--- a/packages/web/components/nav-header.tsx
+++ b/packages/web/components/nav-header.tsx
@@ -1,5 +1,6 @@
 "use client"
 
+import type { JSX } from "react"
 import { useState } from "react"
 import { useTranslations } from "next-intl"
 import { Menu, X } from "lucide-react"
@@ -7,7 +8,7 @@ import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
 import { Link } from "@/i18n/routing"
 
-function GitHubMark({ className }: { readonly className?: string }) {
+function GitHubMark({ className }: { readonly className?: string }): JSX.Element {
   return (
     <svg viewBox="0 0 24 24" aria-hidden="true" className={className} fill="currentColor">
       <path d="M12 2C6.48 2 2 6.58 2 12.25c0 4.53 2.87 8.37 6.84 9.73.5.1.68-.22.68-.49v-1.9c-2.78.62-3.37-1.22-3.37-1.22-.46-1.2-1.11-1.52-1.11-1.52-.91-.64.07-.63.07-.63 1 .07 1.53 1.06 1.53 1.06.9 1.57 2.35 1.12 2.92.85.09-.67.35-1.12.63-1.38-2.22-.26-4.55-1.14-4.55-5.06 0-1.12.39-2.03 1.03-2.75-.1-.26-.45-1.3.1-2.71 0 0 .84-.28 2.75 1.05A9.3 9.3 0 0 1 12 6.94c.85 0 1.7.12 2.5.34 1.9-1.33 2.74-1.05 2.74-1.05.55 1.41.2 2.45.1 2.71.64.72 1.03 1.63 1.03 2.75 0 3.93-2.34 4.8-4.57 5.05.36.32.68.95.68 1.91v2.84c0 .27.18.59.69.49A10.18 10.18 0 0 0 22 12.25C22 6.58 17.52 2 12 2" />
@@ -15,7 +16,7 @@ function GitHubMark({ className }: { readonly className?: string }) {
   )
 }
 
-export function NavHeader() {
+export function NavHeader(): JSX.Element {
   const t = useTranslations("nav")
   const [isOpen, setIsOpen] = useState(false)
 
@@ -59,7 +60,7 @@ export function NavHeader() {
           <Button
             variant="ghost"
             size="icon"
-            className="text-zinc-400 hover:bg-zinc-800 hover:text-white md:hidden"
+            className="h-11 w-11 text-zinc-400 hover:bg-zinc-800 hover:text-white md:hidden"
             onClick={() => setIsOpen(!isOpen)}
             aria-label={isOpen ? "Close menu" : "Open menu"}
             aria-expanded={isOpen}
@@ -80,31 +81,31 @@ export function NavHeader() {
         }
         aria-hidden={!isOpen}
       >
-        <nav className="flex flex-col gap-4 p-4 text-sm font-medium text-zinc-400">
+        <nav className="flex flex-col gap-1 p-3 text-sm font-medium text-zinc-400">
           <Link
             href="/#features"
-            className="transition-colors hover:text-cyan-400"
+            className="flex min-h-11 items-center rounded-md px-3 transition-colors hover:bg-zinc-900 hover:text-cyan-400"
             onClick={() => setIsOpen(false)}
           >
             {t("features")}
           </Link>
           <Link
             href="/#agents"
-            className="transition-colors hover:text-cyan-400"
+            className="flex min-h-11 items-center rounded-md px-3 transition-colors hover:bg-zinc-900 hover:text-cyan-400"
             onClick={() => setIsOpen(false)}
           >
             {t("agents")}
           </Link>
           <Link
             href="/docs"
-            className="transition-colors hover:text-cyan-400"
+            className="flex min-h-11 items-center rounded-md px-3 transition-colors hover:bg-zinc-900 hover:text-cyan-400"
             onClick={() => setIsOpen(false)}
           >
             {t("docs")}
           </Link>
           <Link
             href="/manifesto"
-            className="transition-colors hover:text-cyan-400"
+            className="flex min-h-11 items-center rounded-md px-3 transition-colors hover:bg-zinc-900 hover:text-cyan-400"
             onClick={() => setIsOpen(false)}
           >
             {t("manifesto")}
@@ -113,7 +114,7 @@ export function NavHeader() {
             href="https://github.com/code-yeongyu/oh-my-openagent"
             target="_blank"
             rel="noopener noreferrer"
-            className="flex items-center gap-2 transition-colors hover:text-cyan-400 sm:hidden"
+            className="flex min-h-11 items-center gap-2 rounded-md px-3 transition-colors hover:bg-zinc-900 hover:text-cyan-400 sm:hidden"
             onClick={() => setIsOpen(false)}
           >
             <GitHubMark className="h-4 w-4" />
diff --git a/packages/web/lib/stats.ts b/packages/web/lib/stats.ts
index 305071d8a..9947131f2 100644
--- a/packages/web/lib/stats.ts
+++ b/packages/web/lib/stats.ts
@@ -17,6 +17,13 @@ export interface StatsData {
   weeklyDownloads: number
 }
 
+export interface FormattedStatsData {
+  readonly stars: string
+  readonly totalDownloads: string
+  readonly monthlyDownloads: string
+  readonly weeklyDownloads: string
+}
+
 let cache: StatsCache | null = null
 
 function formatCount(num: number): string {
@@ -85,7 +92,8 @@ async function fetchAllNpmDownloadsForPackage(pkg: string): Promise<number> {
   while (year <= now.getFullYear()) {
     const start = `${year}-01-01`
     const endDate = new Date(year, 11, 31)
-    const end = endDate > now ? now.toISOString().split("T")[0]! : `${year}-12-31`
+    const end =
+      endDate > now ? (now.toISOString().split("T")[0] ?? `${year}-12-31`) : `${year}-12-31`
 
     try {
       const res = await fetch(`https://api.npmjs.org/downloads/point/${start}:${end}/${pkg}`, {
@@ -129,7 +137,7 @@ export async function getStats(): Promise<StatsData> {
   return data
 }
 
-export function formatStats(stats: StatsData) {
+export function formatStats(stats: StatsData): FormattedStatsData {
   return {
     stars: formatCount(stats.stars),
     totalDownloads: formatCount(stats.totalDownloads),
diff --git a/packages/web/middleware.ts b/packages/web/middleware.ts
index 40a1e8463..3cff67463 100644
--- a/packages/web/middleware.ts
+++ b/packages/web/middleware.ts
@@ -28,7 +28,7 @@ function getInstallationDocsPath(pathname: string): string | null {
   return locale ? `/${locale}/docs` : "/docs"
 }
 
-export default function middleware(request: NextRequest) {
+export default function middleware(request: NextRequest): NextResponse {
   const forwardedHost = request.headers.get("x-forwarded-host")
   const requestHost = request.headers.get("host")
   const hostname = (forwardedHost ?? requestHost ?? request.nextUrl.hostname).split(":")[0]
@@ -59,7 +59,15 @@ export default function middleware(request: NextRequest) {
 export const config = {
   matcher: [
     "/",
-    "/((?!api|_next|_vercel|.*\\..*).+)",
+    /*
+     * Match everything except:
+     * - api routes
+     * - Next.js internals (_next, _vercel)
+     * - Next.js file-based metadata routes (opengraph-image, twitter-image, icon, apple-icon, manifest, robots, sitemap)
+     *   These serve images / JSON / XML directly and must NOT be redirected by i18n.
+     * - Any path containing a dot (favicon.ico, *.webp, *.png, etc.)
+     */
+    "/((?!api|_next|_vercel|opengraph-image|twitter-image|icon|apple-icon|manifest\\.webmanifest|robots\\.txt|sitemap\\.xml|.*\\..*).+)",
     "/installation.md",
     "/:locale(en|ko|ja|zh)/installation.md",
     "/docs/installation.md",