style(theme): 缩短明暗过渡到 160ms

stash-web/src/App.css

@@ -22,7 +22,7 @@
   height: 65vh;
   background: url('./assets/site-bg.jpg') center top / cover no-repeat;
   pointer-events: none;
-  transition: opacity 240ms var(--su-ease-in-out);
+  transition: opacity 160ms var(--su-ease-in-out);
 }
 
 .site-background::after {
@@ -1331,18 +1331,18 @@ a.entry-href:hover {
 }
 
 /* ---------- 明暗切换：短暂给所有表面补颜色过渡 ---------- */
-/* 只在切换的 260ms 内加 !important，避免覆盖组件平时的 hover/展开动画。 */
+/* 只在切换的 180ms 内加 !important，避免覆盖组件平时的 hover/展开动画。 */
 html.theme-transition,
 html.theme-transition *,
 html.theme-transition *::before,
 html.theme-transition *::after {
   transition:
-    background-color 240ms var(--su-ease-in-out),
-    border-color 240ms var(--su-ease-in-out),
-    color 240ms var(--su-ease-in-out),
-    fill 240ms var(--su-ease-in-out),
-    stroke 240ms var(--su-ease-in-out),
-    box-shadow 240ms var(--su-ease-in-out) !important;
+    background-color 160ms var(--su-ease-in-out),
+    border-color 160ms var(--su-ease-in-out),
+    color 160ms var(--su-ease-in-out),
+    fill 160ms var(--su-ease-in-out),
+    stroke 160ms var(--su-ease-in-out),
+    box-shadow 160ms var(--su-ease-in-out) !important;
 }
 
 @media (prefers-reduced-motion: reduce) {

stash-web/src/AppNext.tsx

@@ -309,7 +309,7 @@ export default function AppNext() {
     if (root.dataset.scheme === scheme) return
     root.classList.add('theme-transition')
     root.dataset.scheme = scheme
-    const timer = window.setTimeout(() => root.classList.remove('theme-transition'), 260)
+    const timer = window.setTimeout(() => root.classList.remove('theme-transition'), 180)
     return () => {
       window.clearTimeout(timer)
       root.classList.remove('theme-transition')