fix(ui): settle renderer shell style ownership

apps/ui/src/styles/shell.css

@@ -6,11 +6,15 @@
   /* Desktop-first contract: keep the two-column app shell and allow horizontal overflow below 960px until a mobile layout is designed. */
   min-width: 960px;
   display: grid;
-  grid-template-columns: clamp(232px, 19vw, 280px) minmax(0, 1fr);
+  grid-template-columns: clamp(260px, 20vw, 280px) minmax(0, 1fr);
   overflow: hidden;
   background: #f0f7ff;
 }
 
+.shell.sidebar-collapsed {
+  grid-template-columns: 64px minmax(0, 1fr);
+}
+
 .skip-link {
   position: fixed;
   top: 10px;
@@ -1779,10 +1783,6 @@ button.secondary {
   .shell {
     grid-template-columns: 224px minmax(0, 1fr);
   }
-
-  .nav-list {
-    grid-template-columns: repeat(4, minmax(0, 1fr));
-  }
 }
 
 @media (max-width: 720px) {

apps/ui/src/styles/theme-openclaw.css

@@ -19,16 +19,10 @@
   --revamp-border-strong: rgba(148, 163, 184, 0.38);
   --revamp-shadow: 0 14px 32px rgba(15, 23, 42, 0.06);
   --revamp-shadow-soft: 0 8px 18px rgba(15, 23, 42, 0.04);
-  min-width: 960px;
-  grid-template-columns: clamp(260px, 20vw, 280px) minmax(0, 1fr);
   background: var(--revamp-canvas);
   color: var(--revamp-text);
 }
 
-.shell.openclaw-theme.sidebar-collapsed {
-  grid-template-columns: 64px minmax(0, 1fr);
-}
-
 .shell.openclaw-theme button,
 .shell.openclaw-theme [role="button"],
 .shell.openclaw-theme summary,
@@ -1288,14 +1282,6 @@
   transition: border-color 160ms ease, box-shadow 160ms ease;
 }
 
-.conversation-shell .composer-surface:focus-within {
-  border-color: rgba(37, 99, 235, 0.62);
-  box-shadow:
-    inset 0 1px 0 rgba(255, 255, 255, 0.9),
-    0 0 0 3px rgba(37, 99, 235, 0.12),
-    var(--revamp-shadow-soft);
-}
-
 .conversation-shell .composer-surface:focus-within {
   border-color: rgba(37, 99, 235, 0.58);
   box-shadow: