fix: /partage/<slug> routing (regex delimiter + nginx location)

nginx/posterg.conf

@@ -151,6 +151,11 @@ server {
         try_files $uri $uri/ =404;
     }
 
+    # Share-link (partage) — rewrite pretty URLs to index.php
+    location /partage/ {
+        try_files $uri /partage/index.php$is_args$args;
+    }
+
     # Search endpoint - rate limiting
     location = /search.php {
         limit_req zone=search burst=10 nodelay;