fix(watch): 移除监测槽 hover 时 Vuetify 灰遮罩

v-card 关闭 link/ripple 并隐藏 overlay，仅保留外框主题色高亮。

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/changelog/2026-06-12-watch-slot-hover-border.md

@@ -6,6 +6,10 @@
 
 监测槽卡片（空槽/满槽）hover 时改为**外框主题色**，不再整卡铺灰底。
 
+## 补充（2026-06-12 晚）
+
+- `v-card` 设 `:link="false"` `:ripple="false"`，并隐藏 `.v-card__overlay`，消除 Vuetify 默认可点击卡片的 hover 灰遮罩。
+
 ## 涉及文件
 
 - `frontend/src/components/watch/WatchSlotCard.vue`

frontend/src/components/watch/WatchSlotCard.vue

@@ -46,6 +46,8 @@ const load1 = computed(() => props.slot.metrics?.load_1)
     elevation="0"
     border
     rounded="lg"
+    :link="false"
+    :ripple="false"
     class="watch-slot-card pa-3 watch-slot-card--filled"
     :class="{
       'watch-slot-card--error': monitoringOn && slot.metrics?.probe_status && slot.metrics.probe_status !== 'ok',
@@ -194,6 +196,8 @@ const load1 = computed(() => props.slot.metrics?.load_1)
     elevation="0"
     border
     rounded="lg"
+    :link="false"
+    :ripple="false"
     class="watch-slot-card watch-slot-card--empty d-flex align-center justify-center pa-4"
     variant="outlined"
     role="button"
@@ -212,6 +216,10 @@ const load1 = computed(() => props.slot.metrics?.load_1)
 .watch-slot-card {
   min-height: 280px;
 }
+/* Vuetify v-card--link 会在 hover 时铺 v-card__overlay 灰层，此处仅保留外框高亮 */
+.watch-slot-card :deep(.v-card__overlay) {
+  opacity: 0 !important;
+}
 .watch-slot-card--empty {
   min-height: 220px;
   border-style: dashed !important;