Integrate Prisma for content; enhance SEO, i18n, and deployment workflows

Co-authored-by: dennis <dennis@konkol.net>

lib/seo.ts

@@ -0,0 +1,30 @@
+import { locales, type AppLocale } from "@/i18n/locales";
+
+export function getBaseUrl(): string {
+  const raw =
+    process.env.NEXT_PUBLIC_BASE_URL ||
+    process.env.NEXTAUTH_URL || // fallback if ever added
+    "http://localhost:3000";
+  return raw.replace(/\/+$/, "");
+}
+
+export function toAbsoluteUrl(path: string): string {
+  const base = getBaseUrl();
+  const normalized = path.startsWith("/") ? path : `/${path}`;
+  return `${base}${normalized}`;
+}
+
+export function getLanguageAlternates(opts: {
+  /** Path without locale prefix, e.g. "/projects" or "/projects/my-slug" or "" */
+  pathWithoutLocale: string;
+}): Record<AppLocale, string> {
+  const path = opts.pathWithoutLocale === "" ? "" : `/${opts.pathWithoutLocale}`.replace(/\/{2,}/g, "/");
+  const normalizedPath = path === "/" ? "" : path;
+
+  return locales.reduce((acc, l) => {
+    const url = toAbsoluteUrl(`/${l}${normalizedPath}`);
+    acc[l] = url;
+    return acc;
+  }, {} as Record<AppLocale, string>);
+}
+