fix: restore matrix landscape 90° rotation with ml-* CSS and overflow fix

Restores 0910774 rotation structure (external day header + rotated
stage with ml-* layout) and adds missing ml-* CSS rules. Changes
landscape-stage overflow from hidden to visible so viewport can
handle scrolling of time slot content.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/pages/clazz/components/ClazzMatrixView.vue

@@ -65,9 +65,9 @@
       </div>
     </div>
 
-    <!-- ═══ 横屏布局：周几为 X 轴，节次为 Y 轴，表头固定，上下滚动 ═══ -->
+    <!-- ═══ 横屏布局：天为列、时段为行，固定表头、纵向滚动 ═══ -->
     <div v-else class="ml-wrap">
-      <div v-if="!hideLandscapeHeader" class="ml-header">
+      <div class="ml-header">
         <div class="ml-corner">时段</div>
         <div
           v-for="day in weekDays"
@@ -473,7 +473,7 @@ export default defineComponent({
   }
 }
 
-/* ═══ 横屏布局 ═══ */
+/* ═══ 横屏布局（旋转容器内）═══ */
 .matrix-wrapper--landscape {
   width: 100%;
   height: 100%;
@@ -614,4 +614,114 @@ export default defineComponent({
     }
   }
 }
+
+/* 转置布局：时段为列（横向 → 旋转后纵向滚动），天为行（纵向 → 旋转后横向排列） */
+.rm-wrap {
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}
+
+.rm-body {
+  display: flex;
+  flex-direction: row;
+  overflow-x: auto;   /* 横向滚动 → 旋转后变成纵向滚动 */
+  height: 100%;
+  align-items: stretch;
+}
+
+.rm-col {
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  width: 1.6rem;
+  border-left: 1px solid #f0f0f0;
+}
+
+.rm-cell {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  flex-direction: row;
+  gap: 0.02rem;
+  align-items: stretch;
+  padding: 0.03rem;
+  border-bottom: 1px solid #f5f5f5;
+  overflow: hidden;
+
+  &--today {
+    background: #e6f7ff;
+  }
+
+  .event-block {
+    flex: 1;
+    min-width: 0;
+    padding: 0.04rem 0.06rem;
+    border-radius: 0.04rem;
+    cursor: pointer;
+    overflow: hidden;
+
+    .ev-title {
+      font-weight: 600;
+      font-size: 0.2rem;
+      line-height: 1.4;
+      white-space: nowrap;
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
+    .ev-meta {
+      font-size: 0.16rem;
+      color: #888;
+      line-height: 1.3;
+      white-space: nowrap;
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
+    .ev-teacher {
+      font-size: 0.16rem;
+      color: #555;
+      line-height: 1.3;
+      white-space: nowrap;
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
+    .ev-students {
+      font-size: 0.16rem;
+      color: #777;
+      line-height: 1.3;
+      white-space: nowrap;
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
+  }
+
+  .cell-empty {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    min-height: 0.5rem;
+    color: #ccc;
+    font-size: 0.28rem;
+    cursor: pointer;
+    border-radius: 0.04rem;
+
+    &:active {
+      background: #f0f5ff;
+      color: #3788d8;
+    }
+  }
+}
+
+.rm-col-header {
+  flex-shrink: 0;
+  text-align: center;
+  padding: 0.08rem 0.04rem;
+  background: #f7f8fa;
+  border-bottom: 1px solid #e8e8e8;
+  border-top: 1px solid #e8e8e8;
+
+  .hdr-label { font-weight: 600; font-size: 0.2rem; line-height: 1.4; }
+  .hdr-time { font-size: 0.16rem; color: #888; line-height: 1.3; }
+}
 </style>

src/pages/clazz/index.vue

@@ -1492,11 +1492,12 @@ export default defineComponent({
 .landscape-stage {
   width: var(--clazz-landscape-body-height);
   height: 100dvw;
-  overflow: hidden;
+  overflow: visible;
   transform: rotate(90deg) translateY(-100%);
   transform-origin: top left;
 }
 
+
 /* ═══ 横屏矩阵表头（固定在旋转容器外部）═══ */
 .landscape-matrix-header {
   flex-shrink: 0;