[IMP] OneBSpace rebrand of OpenCADStudio -> OneCAD Draft (wordmark, about, crash banner, 23 locales; strip SW/manifest; air-gap: update check, donations, discussions, external help links)

web-app.html

@@ -1,12 +1,11 @@
 <!doctype html>
 <html lang="en">
   <head>
-    <link rel="manifest" href="app.webmanifest" />
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="robots" content="noindex, follow" />
     <meta name="theme-color" content="#1e1e1e" />
-    <title>Open CAD Studio Web App</title>
+    <title>OneCAD Draft</title>
     <link data-trunk rel="icon" href="assets/logo.svg" />
     <style>
       html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; background: #1e1e1e; }
@@ -46,32 +45,17 @@
     <link data-trunk rel="copy-file" href="web/videos.json" />
     <link data-trunk rel="copy-file" href="web/locale-labels.json" />
     <link data-trunk rel="copy-file" href="web/ocs-control.js" />
-    <link data-trunk rel="copy-file" href="web/sw.js" />
-    <link data-trunk rel="copy-file" href="web/app.webmanifest" />
     <link data-trunk rel="copy-file" href="assets/logo.svg" />
   </head>
   <body>
     <div id="loading">
       <div class="spinner"></div>
-      <div class="title">Open <span>CAD</span> Studio</div>
+      <div class="title">One<span>CAD</span> Draft</div>
       <div class="sub">Loading…</div>
     </div>
     <script src="ocs-control.js" defer></script>
-    <script>
-      // Offline support: register the service worker. It is copied next to
-      // this page by Trunk (see the copy-file link in <head>), so the
-      // relative URL resolves to /app/sw.js and the registration scope is
-      // /app/ — the whole app. Registered immediately (not on load) so the
-      // worker starts capturing this visit's asset requests as early as
-      // possible. sw.js never reloads the page on update: a new worker
-      // waits until every tab on the old version has closed.
-      (() => {
-        if (!("serviceWorker" in navigator)) return;
-        navigator.serviceWorker.register("sw.js").catch(error => {
-          console.warn("service worker registration failed; offline support disabled:", error);
-        });
-      })();
-    </script>
+    <!-- OneBSpace (OneCAD Draft): service-worker registration removed — air-gapped
+         embedded build; the app shell is served (and cached) by the host. -->
     <script>
       (() => {
         const splash = document.getElementById("loading");