fix: comprehensive UI fix — all table columns have explicit widths, no ellipsis on data, consistent scroll.x

apps/admin/src/pages/Classrooms/index.tsx

@@ -136,22 +136,22 @@ const ClassroomsPage: React.FC = () => {
 
   const columns = [
     {
-      title: '教室名',
+      title: '教室名', width: 120,
       dataIndex: 'name',
       sorter: (a: any, b: any) => a.name.localeCompare(b.name),
     },
-    { title: '楼栋', dataIndex: 'building' },
-    { title: '楼层', dataIndex: 'floor' },
+    { title: '楼栋', dataIndex: 'building', width: 80 },
+    { title: '楼层', dataIndex: 'floor', width: 80 },
     {
-      title: '类型',
+      title: '类型', width: 90,
       dataIndex: 'roomType',
       render: (v: string) => <Tag color={typeColor[v] || 'default'}>{v || '-'}</Tag>,
     },
-    { title: '容量', dataIndex: 'capacity' },
-    { title: '课程类型', dataIndex: 'courseType', render: (v: string) => v || '-' },
-    { title: '负责人', dataIndex: 'supervisor', render: (v: string) => v || '-' },
+    { title: '容量', dataIndex: 'capacity', width: 80 },
+    { title: '课程类型', dataIndex: 'courseType', width: 100, render: (v: string) => v || '-' },
+    { title: '负责人', dataIndex: 'supervisor', width: 100, render: (v: string) => v || '-' },
     {
-      title: '状态',
+      title: '状态', width: 100,
       dataIndex: 'status',
       render: (s: string, record: { currentUsage?: CurrentUsage | null }) => {
         const effectiveStatus = record.currentUsage ? 'in_use' : s;