rename posterg → xamxam throughout: nginx conf, scripts, PHP source, docs

scripts/setup-dev.sh

@@ -34,12 +34,12 @@ else
     echo "✓ Cloned php-live-reload"
 fi
 
-# Create posterg.db if needed
-if [ ! -f "storage/posterg.db" ]; then
+# Create xamxam.db if needed
+if [ ! -f "storage/xamxam.db" ]; then
     echo ""
-    echo "📊 Creating posterg.db…"
-    sqlite3 storage/posterg.db < storage/schema.sql
-    echo "✓ Created posterg.db"
+    echo "📊 Creating xamxam.db…"
+    sqlite3 storage/xamxam.db < storage/schema.sql
+    echo "✓ Created xamxam.db"
 fi
 
 # Create data directories