Phase 3 implementation. Coordinate system implemented. Initial text box tool implemented.

frontend/nginx.conf

@@ -2,6 +2,12 @@ server {
     listen 80;
     server_name _;
 
+    include /etc/nginx/mime.types;
+    types {
+        application/javascript mjs;
+        application/wasm wasm;
+    }
+
     # Match MAX_UPLOAD_MB — raise in both this and the outer reverse proxy
     client_max_body_size 200m;
 
@@ -42,7 +48,7 @@ server {
     }
 
     # Cache static assets
-    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+    location ~* \.(js|mjs|wasm|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
         expires 1y;
         add_header Cache-Control "public, immutable";
         try_files $uri =404;