teamp tou uu giao dien

management/src/App.tsx

@@ -125,7 +125,7 @@ function App() {
       try {
         const stored = localStorage.getItem('sc_my_classes_details');
         setMyClasses(stored ? JSON.parse(stored) : []);
-      } catch (e) {}
+      } catch (e) { }
     };
     window.addEventListener('my-classes-updated', handleUpdate);
     return () => window.removeEventListener('my-classes-updated', handleUpdate);
@@ -202,30 +202,6 @@ function App() {
             <span className="brand-name">Simple Care</span>
             <span className="brand-sub">Rikkei Education</span>
           </div>
-          <button
-            type="button"
-            className="sidebar-collapse-toggle-pc"
-            onClick={toggleSidebarCollapse}
-            title="Thu gọn menu"
-            style={{
-              background: 'none',
-              border: 'none',
-              color: 'var(--text-muted)',
-              cursor: 'pointer',
-              padding: '4px',
-              display: 'flex',
-              alignItems: 'center',
-              justifyContent: 'center',
-              marginLeft: 'auto',
-              borderRadius: '4px',
-              transition: 'var(--transition)',
-            }}
-          >
-            <svg viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round" strokeLinejoin="round">
-              <line x1="19" y1="12" x2="5" y2="12" />
-              <polyline points="12 19 5 12 12 5" />
-            </svg>
-          </button>
         </div>
 
         <nav>
@@ -365,37 +341,21 @@ function App() {
         </div>
       </aside>
 
+      <button
+        type="button"
+        className={`sidebar-edge-toggle${sidebarCollapsed ? ' sidebar-edge-toggle--collapsed' : ''}`}
+        onClick={toggleSidebarCollapse}
+        title={sidebarCollapsed ? 'Mở rộng menu' : 'Thu gọn menu'}
+      >
+        <svg viewBox="0 0 10 18" width="10" height="18" fill="currentColor">
+          {sidebarCollapsed
+            ? <path d="M1 1 L9 9 L1 17" />
+            : <path d="M9 1 L1 9 L9 17" />
+          }
+        </svg>
+      </button>
+
       <main className={`main-content${sidebarCollapsed ? ' main-content--full' : ''}`}>
-        {sidebarCollapsed && (
-          <button
-            type="button"
-            className="sidebar-expand-btn-pc"
-            onClick={toggleSidebarCollapse}
-            title="Mở rộng menu"
-            style={{
-              position: 'fixed',
-              left: '12px',
-              top: '12px',
-              zIndex: 99,
-              background: '#fff',
-              border: '1px solid var(--border-color)',
-              borderRadius: '50%',
-              width: '32px',
-              height: '32px',
-              display: 'flex',
-              alignItems: 'center',
-              justifyContent: 'center',
-              cursor: 'pointer',
-              boxShadow: 'var(--shadow-sm)',
-              transition: 'var(--transition)',
-            }}
-          >
-            <svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round" strokeLinejoin="round">
-              <line x1="5" y1="12" x2="19" y2="12" />
-              <polyline points="12 5 19 12 12 19" />
-            </svg>
-          </button>
-        )}
         <div className="page-viewport">
           {route.classId ? (
             <ClassWorkspace