中控页面去掉安装到桌面按钮，改由浏览器地址栏安装。

Co-authored-by: Cursor <cursoragent@cursor.com>

static/hub.css

@@ -169,16 +169,11 @@ a:hover { color: #7dd3fc; }
 .nav-spot--flat .nav-spot-last,
 .nav-spot--flat .nav-spot-chg,
 .nav-spot--flat .nav-spot-pct { color: #9aa3bf; }
-.topbar-actions {
+.topbar-logout {
   position: fixed;
   top: 16px;
   right: 22px;
   z-index: 20;
-  display: flex;
-  align-items: center;
-  gap: 10px;
-}
-.topbar-logout {
   color: var(--muted);
   font-size: 0.82rem;
   letter-spacing: 0.04em;
@@ -186,39 +181,6 @@ a:hover { color: #7dd3fc; }
 .topbar-logout:hover {
   color: #e8f1ff;
 }
-.topbar-install {
-  appearance: none;
-  border: 1px solid #304164;
-  background: #151a2a;
-  color: #dbe4ff;
-  font-size: 0.78rem;
-  border-radius: 8px;
-  padding: 4px 10px;
-  cursor: pointer;
-  font-family: inherit;
-}
-.topbar-install:hover {
-  color: #ffffff;
-  border-color: #3d5278;
-}
-.topbar-install-hint {
-  position: fixed;
-  top: 46px;
-  right: 22px;
-  z-index: 20;
-  margin: 0;
-  max-width: min(360px, calc(100vw - 40px));
-  color: var(--muted);
-  font-size: 0.75rem;
-  line-height: 1.4;
-  text-align: right;
-}
-@media (display-mode: standalone) {
-  .topbar-install,
-  .topbar-install-hint {
-    display: none !important;
-  }
-}
 @media (max-width: 1100px) {
   .topbar-row {
     grid-template-columns: 1fr;