Refactor for i18n, CMS integration, and project slugs; enhance admin & analytics

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

app/api/projects/route.ts

@@ -3,6 +3,7 @@ import { prisma } from '@/lib/prisma';
 import { apiCache } from '@/lib/cache';
 import { requireSessionAuth, checkRateLimit, getRateLimitHeaders } from '@/lib/auth';
 import { PrismaClientKnownRequestError } from '@prisma/client/runtime/library';
+import { generateUniqueSlug } from '@/lib/slug';
 
 export async function GET(request: NextRequest) {
   try {
@@ -154,11 +155,27 @@ export async function POST(request: NextRequest) {
     
     // Remove difficulty field if it exists (since we're removing it)
     // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    const { difficulty, ...projectData } = data;
+    const { difficulty, slug, defaultLocale, ...projectData } = data;
+
+    const derivedSlug =
+      typeof slug === 'string' && slug.trim()
+        ? slug.trim()
+        : await generateUniqueSlug({
+            base: String(projectData.title || 'project'),
+            isTaken: async (candidate) => {
+              const existing = await prisma.project.findUnique({
+                where: { slug: candidate },
+                select: { id: true },
+              });
+              return !!existing;
+            },
+          });
     
     const project = await prisma.project.create({
       data: {
         ...projectData,
+        slug: derivedSlug,
+        defaultLocale: typeof defaultLocale === 'string' && defaultLocale ? defaultLocale : undefined,
         // Set default difficulty since it's required in schema
         difficulty: 'INTERMEDIATE',
         performance: data.performance || { lighthouse: 0, bundleSize: '0KB', loadTime: '0s' },