Initial commit: Astro 6 static blog site

- German (default) and English i18n support
- Categories and tags
- Blog posts with hero images
- Dark/light theme switcher
- View Transitions removed to fix reload ghost images
- Webmentions integration
- RSS feeds per locale

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

src/i18n/ui.ts

@@ -0,0 +1,134 @@
+import { DEFAULT_LOCALE, type Locale, LOCALES } from '~/consts';
+
+export const ui = {
+	de: {
+		'nav.home': 'Start',
+		'nav.about': 'Über mich',
+		'nav.categories': 'Kategorien',
+		'nav.tags': 'Schlagwörter',
+		'post.lastUpdated': 'Zuletzt aktualisiert am',
+		'post.category': 'Kategorie',
+		'post.tags': 'Schlagwörter',
+		'post.translationAvailable': 'Dieser Beitrag ist auch auf Englisch verfügbar:',
+		'post.translationLink': 'Englische Version lesen',
+		'categories.title': 'Kategorien',
+		'categories.description': 'Alle Kategorien im Überblick.',
+		'category.postsIn': 'Beiträge in',
+		'category.noPosts': 'Noch keine Beiträge in dieser Kategorie.',
+		'tags.title': 'Schlagwörter',
+		'tags.description': 'Alle Schlagwörter im Überblick.',
+		'tag.postsTagged': 'Beiträge mit',
+		'tag.noPosts': 'Noch keine Beiträge mit diesem Stichwort.',
+		'footer.contact': 'Kontakt',
+		'footer.imprint': 'Impressum',
+		'footer.privacy': 'Datenschutz',
+		'webmentions.title': 'Reaktionen',
+		'webmentions.like': 'Like',
+		'webmentions.likes': 'Likes',
+		'webmentions.repost': 'Repost',
+		'webmentions.reposts': 'Reposts',
+		'webmentions.replies': 'Antworten',
+		'webmentions.mentions': 'Erwähnungen',
+		'lang.de': 'Deutsch',
+		'lang.en': 'English',
+	},
+	en: {
+		'nav.home': 'Home',
+		'nav.about': 'About',
+		'nav.categories': 'Categories',
+		'nav.tags': 'Tags',
+		'post.lastUpdated': 'Last updated on',
+		'post.category': 'Category',
+		'post.tags': 'Tags',
+		'post.translationAvailable': 'This post is also available in German:',
+		'post.translationLink': 'Read the German version',
+		'categories.title': 'Categories',
+		'categories.description': 'All categories at a glance.',
+		'category.postsIn': 'Posts in',
+		'category.noPosts': 'No posts in this category yet.',
+		'tags.title': 'Tags',
+		'tags.description': 'All tags at a glance.',
+		'tag.postsTagged': 'Posts tagged',
+		'tag.noPosts': 'No posts with this tag yet.',
+		'footer.contact': 'Contact',
+		'footer.imprint': 'Imprint',
+		'footer.privacy': 'Privacy',
+		'webmentions.title': 'Reactions',
+		'webmentions.like': 'Like',
+		'webmentions.likes': 'Likes',
+		'webmentions.repost': 'Repost',
+		'webmentions.reposts': 'Reposts',
+		'webmentions.replies': 'Replies',
+		'webmentions.mentions': 'Mentions',
+		'lang.de': 'Deutsch',
+		'lang.en': 'English',
+	},
+} as const satisfies Record<Locale, Record<string, string>>;
+
+export type UIKey = keyof (typeof ui)['de'];
+
+export function t(locale: Locale, key: UIKey): string {
+	return ui[locale][key];
+}
+
+export function isLocale(value: string | undefined): value is Locale {
+	return !!value && (LOCALES as readonly string[]).includes(value);
+}
+
+export function getLocaleFromUrl(url: URL): Locale {
+	const seg = url.pathname.split('/').filter(Boolean)[0];
+	return isLocale(seg) ? seg : DEFAULT_LOCALE;
+}
+
+/**
+ * Build a URL for a route within a given locale. `path` is the route without
+ * any language prefix, e.g. "/" or "/about".
+ */
+export function localizePath(path: string, locale: Locale): string {
+	const normalized = path.startsWith('/') ? path : `/${path}`;
+	if (locale === DEFAULT_LOCALE) return normalized;
+	if (normalized === '/') return `/${locale}/`;
+	return `/${locale}${normalized}`;
+}
+
+/**
+ * Segments whose URL slug differs per locale. The first segment of any
+ * non-prefixed pathname is translated through this map when switching.
+ */
+const LOCALIZED_SEGMENTS: Record<Locale, Record<string, string>> = {
+	de: {
+		category: 'kategorie',
+		categories: 'kategorien',
+		about: 'ueber-mich',
+		tag: 'schlagwort',
+		tags: 'schlagwoerter',
+		contact: 'kontakt',
+		imprint: 'impressum',
+		'privacy-policy': 'datenschutz',
+	},
+	en: {
+		kategorie: 'category',
+		kategorien: 'categories',
+		'ueber-mich': 'about',
+		schlagwort: 'tag',
+		schlagwoerter: 'tags',
+		kontakt: 'contact',
+		impressum: 'imprint',
+		datenschutz: 'privacy-policy',
+	},
+};
+
+/**
+ * Swap the locale of the current pathname, preserving the rest of the route
+ * and translating known per-locale URL segments (e.g. `kategorie` ↔ `category`).
+ */
+export function switchLocalePath(pathname: string, target: Locale): string {
+	const parts = pathname.split('/').filter(Boolean);
+	if (parts.length > 0 && isLocale(parts[0])) parts.shift();
+	if (parts.length > 0) {
+		const translated = LOCALIZED_SEGMENTS[target][parts[0]];
+		if (translated) parts[0] = translated;
+	}
+	const rest = parts.length ? `/${parts.join('/')}` : '/';
+	return localizePath(rest === '/' ? '/' : rest, target);
+}