From 7168a97afa642b6bc992f38b8da962650365936b Mon Sep 17 00:00:00 2001
From: DiheChen <michikawachin@outlook.com>
Date: Thu, 5 Nov 2026 12:46:00 +0800
Subject: [PATCH] fix: slide the side panel tabs in their own direction

---
 web/src/app/app.tsx            | 4 +++-
 web/src/app/style.css          | 9 +++++----
 web/src/app/view-transition.ts | 3 ++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/web/src/app/app.tsx b/web/src/app/app.tsx
index ca59b52..d3fd81d 100644
--- a/web/src/app/app.tsx
+++ b/web/src/app/app.tsx
@@ -218,8 +218,10 @@ export function App() {
   // 加入房间前不显示面板：底部的切换按钮此时不可用，而聊天视图的关闭按钮在 RoomGate 内，打开的聊天面板会无法关闭。
   const shownPanel = joined && panel !== page ? panel : null
   const switchPanel = (next: Panel | null) => {
+    // 侧栏 tab 里播放历史排在播放列表右边，切回播放列表时内容要从左边进来。
+    const direction = shownPanel === 'history' && next === 'queue' ? 'backward' : 'forward'
     if (shownPanel && next && next !== shownPanel && next !== page)
-      withViewTransition(() => navigationStore.setPanel(next))
+      withViewTransition(() => navigationStore.setPanel(next), direction)
     else
       navigationStore.setPanel(next)
   }
diff --git a/web/src/app/style.css b/web/src/app/style.css
index 7aed1fb..2f1a149 100644
--- a/web/src/app/style.css
+++ b/web/src/app/style.css
@@ -76,7 +76,8 @@
   from { opacity: 0; }
   to { opacity: 1; }
 }
-:root { --detail-panel-width: 480px; }
+:root { --detail-panel-width: 480px; --view-direction: 1; }
+:root[data-view-direction='backward'] { --view-direction: -1; }
 .detail-panel { width: var(--detail-panel-width); flex-shrink: 0; position: relative; min-height: 0; display: flex; flex-direction: column; border: 0; border-radius: 12px; background: var(--color-panel); overflow: hidden; animation: detail-panel-open 240ms cubic-bezier(.2, .8, .2, 1) both; }
 .detail-panel-content { view-transition-name: detail-panel-content; width: var(--detail-panel-width); flex: 1; min-height: 0; display: flex; flex-direction: column; }
 .detail-panel-closing { pointer-events: none; animation-name: detail-panel-close; }
@@ -99,15 +100,15 @@
 ::view-transition-new(detail-panel-content) { animation: view-push-in 300ms cubic-bezier(.2, .8, .2, 1) both; }
 @keyframes view-recede {
   from { transform: translateX(0); }
-  to { transform: translateX(-14%); }
+  to { transform: translateX(calc(var(--view-direction) * -14%)); }
 }
 @keyframes view-push-in {
-  from { transform: translateX(100%); }
+  from { transform: translateX(calc(var(--view-direction) * 100%)); }
   to { transform: translateX(0); }
 }
 .detail-panel-swap { animation: detail-panel-swap-in 180ms cubic-bezier(.2, .8, .2, 1) both; }
 @keyframes detail-panel-swap-in {
-  from { opacity: 0; transform: translateX(10px); }
+  from { opacity: 0; transform: translateX(calc(var(--view-direction) * 10px)); }
   to { opacity: 1; transform: translateX(0); }
 }
 :root[data-performance='low'] .header-menu[open] .main-nav { animation: fade-in 160ms ease both; }
diff --git a/web/src/app/view-transition.ts b/web/src/app/view-transition.ts
index dfff078..89061c1 100644
--- a/web/src/app/view-transition.ts
+++ b/web/src/app/view-transition.ts
@@ -5,7 +5,8 @@ export function canPushViews(): boolean {
   return 'startViewTransition' in document && performanceStore.smoothMotion()
 }
 
-export function withViewTransition(update: () => void): void {
+export function withViewTransition(update: () => void, direction: 'forward' | 'backward'): void {
+  document.documentElement.dataset.viewDirection = direction
   if (!canPushViews()) {
     update()
     return