fix(landing): link English-only tool-detail and self-hosted pages to un-prefixed URLs (#553)

Tool-detail pages (/tools/<section>/<tool>/) and the /self-hosted pages are
built only in English, with no per-locale route, so a locale-prefixed link
404s in the static build. Add an enOnlyHref() helper and use it for those
links in Footer, Navbar, HeroSearch, and ToolGrid so localized pages point at
the English pages that actually exist. Adds an e2e guard asserting localized
pages emit un-prefixed URLs for those routes.

apps/landing/src/components/Footer.astro

@@ -3,7 +3,7 @@
 // biome-ignore-all lint/correctness/noUnusedVariables: Astro template consumes frontmatter values.
 import LanguageSwitcher from "@/components/LanguageSwitcher.astro";
 import { t } from "@/i18n";
-import { localizeHref } from "@/lib/i18n-page";
+import { enOnlyHref, localizeHref } from "@/lib/i18n-page";
 
 interface Props {
   locale?: string;
@@ -29,7 +29,7 @@ const columns = [
     title: t(locale, "footer.col.solutions"),
     links: [
       { label: t(locale, "footer.link.enterprise"), href: localizeHref(locale, "/#enterprise") },
-      { label: t(locale, "footer.link.selfHosted"), href: localizeHref(locale, "/self-hosted") },
+      { label: t(locale, "footer.link.selfHosted"), href: enOnlyHref("/self-hosted") },
       { label: t(locale, "footer.link.openSource"), href: localizeHref(locale, "/#open-source") },
       { label: t(locale, "footer.link.alternatives"), href: localizeHref(locale, "/alternatives") },
       { label: t(locale, "footer.link.pricing"), href: localizeHref(locale, "/#pricing") },

apps/landing/src/components/HeroSearch.astro

@@ -4,7 +4,7 @@
 import { TOOLS, toolSection } from "@snapotter/shared";
 import * as lucideIcons from "lucide";
 import { t } from "@/i18n";
-import { localizeHref } from "@/lib/i18n-page";
+import { enOnlyHref, localizeHref } from "@/lib/i18n-page";
 import { loadToolStrings } from "@/lib/tool-strings";
 
 interface Props {
@@ -72,7 +72,7 @@ function renderIcon(iconName: string): string {
             hidden
           >
             <a
-              href={localizeHref(locale, `/tools/${toolSection(tool)}/${tool.id}/`)}
+              href={enOnlyHref(`/tools/${toolSection(tool)}/${tool.id}/`)}
               class="flex items-center gap-3 px-4 py-2.5 no-underline transition-colors hover:bg-primary-subtle"
             >
               <svg

apps/landing/src/components/Navbar.astro

@@ -1,7 +1,7 @@
 ---
 // biome-ignore-all lint/correctness/noUnusedVariables: Astro template consumes frontmatter values.
 import { t } from "@/i18n";
-import { localizeHref } from "@/lib/i18n-page";
+import { enOnlyHref, localizeHref } from "@/lib/i18n-page";
 import { formatCompact, getStarCount } from "@/lib/stats";
 
 interface Props {
@@ -16,12 +16,12 @@ type NavItem = { label: string; href: string; external?: boolean; desc?: string
 const productLinks: NavItem[] = [
   {
     label: t(locale, "nav.product.developers.label"),
-    href: localizeHref(locale, "/self-hosted/file-conversion-api"),
+    href: enOnlyHref("/self-hosted/file-conversion-api"),
     desc: t(locale, "nav.product.developers.desc"),
   },
   {
     label: t(locale, "nav.product.selfHosted.label"),
-    href: localizeHref(locale, "/self-hosted"),
+    href: enOnlyHref("/self-hosted"),
     desc: t(locale, "nav.product.selfHosted.desc"),
   },
   {

apps/landing/src/components/ToolGrid.astro

@@ -4,7 +4,7 @@
 import { CATEGORIES, TOOLS, toolSection } from "@snapotter/shared";
 import * as lucideIcons from "lucide";
 import { t } from "@/i18n";
-import { localizeHref } from "@/lib/i18n-page";
+import { enOnlyHref, localizeHref } from "@/lib/i18n-page";
 import { loadToolStrings } from "@/lib/tool-strings";
 import type { ModalityFilter, ToolSearchItem } from "../lib/tool-search";
 import SectionHeading from "./SectionHeading.astro";
@@ -169,7 +169,7 @@ function toToolSearchItem(tool: (typeof TOOLS)[number]): ToolSearchItem {
     description: toolStrings[tool.id]?.description ?? tool.description,
     modality: tool.modality as ToolModality,
     category: tool.category,
-    url: localizeHref(locale, `/tools/${toolSection(tool)}/${tool.id}/`),
+    url: enOnlyHref(`/tools/${toolSection(tool)}/${tool.id}/`),
     icon: tool.icon,
     iconSvg: renderIcon(tool.icon),
     color: category?.color ?? "#E07832",