style: format web/src with oxfmt defaults (via vp fmt)

One-time mechanical sweep, isolated from any functional change.
- oxfmt defaults: double quotes, semicolons, 2-space indent, LF,
  printWidth 100, trailing commas, bracket spacing, arrow parens.
- vite.config.ts gains an fmt.ignorePatterns block for web/static:
  vendored/minified assets (htmx.min.js, compiled css) must never
  be reformatted.
- Verified: rebuild after the sweep produces byte-identical JS/CSS
  bundles; only sourcemaps changed (they embed sourcesContent).

web/src/websocket.ts

@@ -120,9 +120,4 @@ function createWebSocket(config: {
   return ws;
 }
 
-export {
-  addListener,
-  createWebSocket,
-  disconnectWebSocket,
-  removeListener,
-};
+export { addListener, createWebSocket, disconnectWebSocket, removeListener };