feat(site): install page led by install.sh script, package-manager tabs

site/src/pages/install.astro

@@ -0,0 +1,54 @@
+---
+import Base from "../layouts/Base.astro";
+import Nav from "../components/Nav.astro";
+import Footer from "../components/Footer.astro";
+import InstallTabs from "../components/InstallTabs.astro";
+import { useTranslations, DOCS_URL } from "../i18n/ui";
+
+const locale = "en" as const;
+const t = useTranslations(locale);
+
+const script = "curl --proto '=https' --tlsv1.2 -sSLf https://termscp.rs/install.sh | sh";
+
+// Verified package managers (see repo README). Cargo is universal.
+const methods = [
+  { id: "cargo", label: "Cargo", cmd: "cargo install termscp --locked" },
+  { id: "arch", label: "Arch Linux", cmd: "pacman -S termscp" },
+  { id: "netbsd", label: "NetBSD", cmd: "pkgin install termscp" },
+  { id: "choco", label: "Windows (Chocolatey)", cmd: "choco install termscp" },
+];
+---
+<Base
+  title="Install termscp"
+  description="Install termscp on Linux, macOS, BSD and Windows — one shell command, or via Cargo, pacman, pkgin and Chocolatey."
+  locale={locale}
+  path="/install"
+>
+  <Nav locale={locale} path="/install" />
+  <main class="mx-auto w-full max-w-3xl flex-1 px-4 py-12">
+    <h1 class="text-2xl font-bold text-text">{t("install.heading")}</h1>
+    <p class="mt-2 text-subtext">{t("install.subtitle")}</p>
+
+    <!-- Primary: install script -->
+    <div class="mt-6 rounded-lg border border-line bg-mantle p-1">
+      <div class="flex items-center gap-2 border-b border-line px-3 py-2 text-xs text-overlay">
+        <span class="text-green">$</span> Linux · macOS · BSD
+      </div>
+      <pre class="m-0 overflow-auto bg-base px-4 py-4 text-sm text-text"><code>{script}</code></pre>
+    </div>
+    <p class="mt-2 text-xs text-overlay">Requires <span class="text-text">curl</span>. macOS uses Homebrew if available, otherwise builds from source.</p>
+
+    <!-- Secondary: package managers -->
+    <h2 class="mt-10 mb-3 text-lg text-text">Package managers</h2>
+    <InstallTabs methods={methods} />
+
+    <p class="mt-8 text-sm text-overlay">
+      Update anytime with <span class="text-green">termscp --update</span>.
+    </p>
+    <p class="mt-2 text-sm text-overlay">
+      Linux build deps: <span class="text-text">libdbus-1</span>, <span class="text-text">pkg-config</span>, <span class="text-text">libsmbclient</span>.
+      More details in the <a href={DOCS_URL} class="text-blue hover:underline">docs</a>.
+    </p>
+  </main>
+  <Footer locale={locale} />
+</Base>