fix(frontend): add module type to script tag

Amolith created

The refactor in HEAD^ split app.js into modules with import statements,
but the script tag wasn't updated to support module syntax, causing
'Uncaught SyntaxError: import declarations may only appear at top
level
of a module' and breaking deep links and room joining.

Assisted-by: Claude Sonnet 4.5 via Crush

Change summary

static/index.html | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Detailed changes

static/index.html 🔗

@@ -106,6 +106,6 @@ SPDX-License-Identifier: AGPL-3.0-or-later
     </div>
   </div>
 
-  <script src="/app.js"></script>
+  <script type="module" src="/app.js"></script>
 </body>
 </html>