fix: 修复深色导航与会商悬浮样式

frontend-web/src/components/page-sidebar-dark.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useRef, useState } from "react";
 import { useNavigate, useLocation } from "react-router-dom";
+import { PanelLeftOpen, PanelLeftClose } from "lucide-react";
 
 import { getStoredAuth } from "@/core/auth";
 import { isWujieEnv } from "@/core/embed/wujie";
@@ -12,7 +13,13 @@ import {
 import { useSidebarMenuItems } from "@/core/page-layout/use-sidebar-menu";
 import './page-sdebar.css'
 
-export function PageSidebarDark() {
+type PageSidebarDarkProps = {
+  /** 是否收起（true 时只渲染左下角浮动入口，sidebar 主体隐藏） */
+  collapsed: boolean;
+  onToggleCollapsed: () => void;
+};
+
+export function PageSidebarDark({ collapsed, onToggleCollapsed }: PageSidebarDarkProps) {
   const isAdmin = getStoredAuth()?.system_role === "admin";
   const visibleMenuItems = useSidebarMenuItems(!!isAdmin);
   const inWujieEnv = isWujieEnv();
@@ -189,6 +196,22 @@ export function PageSidebarDark() {
     </div>
   );
 
+  // 收起时主侧栏不占宽度，保留左下角入口以便随时恢复。
+  if (collapsed) {
+    return (
+      <button
+        type="button"
+        title="展开侧边栏"
+        aria-label="展开侧边栏"
+        className="sidebar-collapse-btn sidebar-collapse-btn--floating"
+        onClick={onToggleCollapsed}
+      >
+        <PanelLeftOpen className="sidebar-collapse-btn__icon" aria-hidden="true" />
+        <span className="sidebar-collapse-btn__label">展开面板</span>
+      </button>
+    );
+  }
+
   return (
     <aside className={`sidebar-contnet ${inWujieEnv ? "" : "sidebar-contnet--top-submenu"}`}>
       <div className="sidebar-contents">
@@ -220,6 +243,17 @@ export function PageSidebarDark() {
             </div>
           </div>
         ))}
+
+        <button
+          type="button"
+          title="收起侧边栏"
+          aria-label="收起侧边栏"
+          className="sidebar-collapse-btn sidebar-collapse-btn--inline"
+          onClick={onToggleCollapsed}
+        >
+          <PanelLeftClose className="sidebar-collapse-btn__icon" aria-hidden="true" />
+          <span className="sidebar-collapse-btn__label">收起面板</span>
+        </button>
       </div>
     </aside>
   );