diff --git a/docs/changelog/2026-06-11-watch-slot-click-fix.md b/docs/changelog/2026-06-11-watch-slot-click-fix.md
new file mode 100644
index 00000000..e20c7bc7
--- /dev/null
+++ b/docs/changelog/2026-06-11-watch-slot-click-fix.md
@@ -0,0 +1,30 @@
+# 2026-06-11 监测槽点击交互修复
+
+## 摘要
+
+修复服务器页实时监测槽「点击无反应」：空槽可点击选机、已填槽点击进历史；列表「+」已在监测时给出提示。
+
+## 动机
+
+设计文档要求空槽显示「+ 添加监测」并可点击选机，实现中未绑定事件；已填槽仅小字「历史」可点，整体卡片无交互。
+
+## 涉及文件
+
+- `frontend/src/components/watch/WatchSlotCard.vue` — 空/满槽点击、hover、文案
+- `frontend/src/components/watch/WatchSlotPickDialog.vue` — 选机对话框（新增）
+- `frontend/src/components/watch/WatchSlotRow.vue` — 串联选机与 pin API
+- `frontend/src/composables/useWatchPins.ts` — `pinServer` 支持 `slot_index`
+- `frontend/src/components/watch/WatchSparkline.vue` — `pointer-events: none` 避免图表挡点击
+- `frontend/src/pages/ServersPage.vue` — 已在监测时 snackbar 提示
+
+## 迁移 / 重启
+
+无。前端构建部署即可。
+
+## 验证
+
+```bash
+cd frontend && npm run type-check
+```
+
+浏览器 `#/servers`：点击虚线空槽 → 搜索选服务器 → 加入；点击有数据的槽卡片 → 跳转监测历史；列表对已监测服务器点 + → 提示槽位号。
diff --git a/frontend/src/components/watch/WatchSlotCard.vue b/frontend/src/components/watch/WatchSlotCard.vue
index 10044e02..c8c18131 100644
--- a/frontend/src/components/watch/WatchSlotCard.vue
+++ b/frontend/src/components/watch/WatchSlotCard.vue
@@ -12,6 +12,7 @@ const emit = defineEmits<{
   remove: [slotIndex: number]
   processes: [slot: WatchSlot]
   history: [slot: WatchSlot]
+  pick: [slotIndex: number]
 }>()
 
 const chartMetric = ref<'cpu_pct' | 'mem_pct' | 'disk_pct'>('cpu_pct')
@@ -27,10 +28,14 @@ function pct(v: number | null | undefined) {
     elevation="0"
     border
     rounded="lg"
-    class="watch-slot-card pa-3"
+    class="watch-slot-card pa-3 watch-slot-card--filled"
     :class="{ 'watch-slot-card--error': slot.metrics?.probe_status && slot.metrics.probe_status !== 'ok' }"
+    role="button"
+    tabindex="0"
+    @click="emit('history', slot)"
+    @keydown.enter.prevent="emit('history', slot)"
   >
-    <div class="d-flex align-center mb-2">
+    <div class="d-flex align-center mb-2" @click.stop>
       <div class="text-subtitle-2 text-truncate flex-grow-1" :title="slot.server_name">
         {{ slot.server_name || `ID ${slot.server_id}` }}
       </div>
@@ -40,6 +45,7 @@ function pct(v: number | null | undefined) {
       <v-btn icon="mdi-close" size="x-small" variant="text" @click="emit('remove', slot.slot_index)" />
     </div>
 
+    <div @click.stop>
     <v-chip
       v-if="slot.metrics?.probe_status"
       size="x-small"
@@ -81,10 +87,11 @@ function pct(v: number | null | undefined) {
     <div class="d-flex align-center justify-space-between mt-2">
       <span class="text-caption text-medium-emphasis">剩余 {{ formatRemaining(slot.remaining_sec) }}</span>
       <div class="d-flex ga-1">
-        <v-btn size="x-small" variant="text" @click="emit('processes', slot)">进程</v-btn>
-        <v-btn size="x-small" variant="text" @click="emit('history', slot)">历史</v-btn>
+        <v-btn size="x-small" variant="text" @click.stop="emit('processes', slot)">进程</v-btn>
+        <v-btn size="x-small" variant="text" @click.stop="emit('history', slot)">历史</v-btn>
       </div>
     </div>
+    </div>
   </v-card>
 
   <v-card
@@ -94,10 +101,14 @@ function pct(v: number | null | undefined) {
     rounded="lg"
     class="watch-slot-card watch-slot-card--empty d-flex align-center justify-center pa-4"
     variant="outlined"
+    role="button"
+    tabindex="0"
+    @click="emit('pick', slot.slot_index)"
+    @keydown.enter.prevent="emit('pick', slot.slot_index)"
   >
     <div class="text-center text-medium-emphasis">
       <v-icon size="28" class="mb-1">mdi-plus-circle-outline</v-icon>
-      <div class="text-caption">槽 {{ slot.slot_index + 1 }} · 空</div>
+      <div class="text-caption">槽 {{ slot.slot_index + 1 }} · 添加监测</div>
     </div>
   </v-card>
 </template>
@@ -109,6 +120,17 @@ function pct(v: number | null | undefined) {
 .watch-slot-card--empty {
   min-height: 220px;
   border-style: dashed !important;
+  cursor: pointer;
+  transition: background-color 0.15s ease;
+}
+.watch-slot-card--empty:hover {
+  background: rgba(var(--v-theme-primary), 0.04);
+}
+.watch-slot-card--filled {
+  cursor: pointer;
+}
+.watch-slot-card--filled:hover {
+  background: rgba(var(--v-theme-surface-variant), 0.3);
 }
 .watch-slot-card--error {
   border-color: rgb(var(--v-theme-error)) !important;
diff --git a/frontend/src/components/watch/WatchSlotPickDialog.vue b/frontend/src/components/watch/WatchSlotPickDialog.vue
new file mode 100644
index 00000000..4dfdf6e6
--- /dev/null
+++ b/frontend/src/components/watch/WatchSlotPickDialog.vue
@@ -0,0 +1,108 @@
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue'
+import { fetchPagePerPage } from '@/utils/paginatedFetch'
+import type { ServerApiItem } from '@/types/api'
+
+const open = defineModel<boolean>({ required: true })
+
+const props = defineProps<{
+  slotIndex: number | null
+  loading?: boolean
+}>()
+
+const emit = defineEmits<{
+  pick: [serverId: number]
+}>()
+
+const search = ref('')
+const listLoading = ref(false)
+const servers = ref<ServerApiItem[]>([])
+const selectedId = ref<number | null>(null)
+
+const filteredServers = computed(() => {
+  const q = search.value.toLowerCase().trim()
+  if (!q) return servers.value
+  return servers.value.filter(
+    (s) =>
+      s.name.toLowerCase().includes(q) ||
+      (s.domain || '').toLowerCase().includes(q) ||
+      (s.target_path || '').toLowerCase().includes(q) ||
+      String(s.id).includes(q),
+  )
+})
+
+watch(open, async (visible) => {
+  if (!visible) {
+    search.value = ''
+    selectedId.value = null
+    return
+  }
+  listLoading.value = true
+  try {
+    const res = await fetchPagePerPage<ServerApiItem>('/servers/', {}, 1, -1)
+    servers.value = res.items
+  } catch {
+    servers.value = []
+  } finally {
+    listLoading.value = false
+  }
+})
+
+function confirmPick() {
+  if (selectedId.value == null) return
+  emit('pick', selectedId.value)
+}
+</script>
+
+<template>
+  <v-dialog v-model="open" max-width="480" @keydown.enter.prevent="confirmPick">
+    <v-card rounded="lg">
+      <v-card-title>
+        加入监测
+        <span v-if="props.slotIndex != null" class="text-caption text-medium-emphasis ml-2">
+          槽 {{ props.slotIndex + 1 }}
+        </span>
+      </v-card-title>
+      <v-card-text>
+        <v-autocomplete
+          v-model="selectedId"
+          v-model:search="search"
+          :items="filteredServers"
+          :loading="listLoading"
+          item-title="name"
+          item-value="id"
+          label="搜索服务器"
+          placeholder="名称 / 域名 / 路径 / ID"
+          variant="outlined"
+          density="compact"
+          prepend-inner-icon="mdi-magnify"
+          autofocus
+          :custom-filter="() => true"
+        >
+          <template #item="{ props: itemProps, item }">
+            <v-list-item v-bind="itemProps" :subtitle="item.domain">
+              <template #prepend>
+                <v-icon :color="item.is_online ? 'success' : 'grey'" size="8" class="mr-2">
+                  mdi-circle
+                </v-icon>
+              </template>
+            </v-list-item>
+          </template>
+        </v-autocomplete>
+      </v-card-text>
+      <v-card-actions>
+        <v-spacer />
+        <v-btn variant="text" @click="open = false">取消</v-btn>
+        <v-btn
+          color="primary"
+          variant="flat"
+          :disabled="selectedId == null"
+          :loading="loading"
+          @click="confirmPick"
+        >
+          加入
+        </v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
+</template>
diff --git a/frontend/src/components/watch/WatchSlotRow.vue b/frontend/src/components/watch/WatchSlotRow.vue
index 3c5c3838..fd3ff2c4 100644
--- a/frontend/src/components/watch/WatchSlotRow.vue
+++ b/frontend/src/components/watch/WatchSlotRow.vue
@@ -1,16 +1,21 @@
 <script setup lang="ts">
-import { onMounted } from 'vue'
+import { onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import WatchSlotCard from '@/components/watch/WatchSlotCard.vue'
 import WatchProcessDrawer from '@/components/watch/WatchProcessDrawer.vue'
+import WatchSlotPickDialog from '@/components/watch/WatchSlotPickDialog.vue'
 import { useWatchPins, type WatchSlot } from '@/composables/useWatchPins'
-import { ref } from 'vue'
+import { useSnackbar } from '@/composables/useSnackbar'
 
 const router = useRouter()
-const { slots, loading, refreshPins, removeSlot } = useWatchPins()
+const snackbar = useSnackbar()
+const { slots, loading, refreshPins, removeSlot, pinServer } = useWatchPins()
 
 const processDrawer = ref(false)
 const processSlot = ref<WatchSlot | null>(null)
+const showPickDialog = ref(false)
+const pickSlotIndex = ref<number | null>(null)
+const pickLoading = ref(false)
 
 onMounted(() => {
   refreshPins()
@@ -34,6 +39,29 @@ function openHistory(slot: WatchSlot) {
     },
   })
 }
+
+function onPickSlot(slotIndex: number) {
+  pickSlotIndex.value = slotIndex
+  showPickDialog.value = true
+}
+
+async function onPickServer(serverId: number) {
+  if (pickSlotIndex.value == null) return
+  pickLoading.value = true
+  try {
+    const res = await pinServer(serverId, { slotIndex: pickSlotIndex.value })
+    if (res.ok) {
+      snackbar(`已加入监测 · 槽 ${pickSlotIndex.value + 1}`, 'success')
+      showPickDialog.value = false
+    } else if (res.full) {
+      snackbar('监测槽已满，请先移除一台', 'warning')
+    } else {
+      snackbar(res.error || '加入监测失败', 'error')
+    }
+  } finally {
+    pickLoading.value = false
+  }
+}
 </script>
 
 <template>
@@ -54,9 +82,16 @@ function openHistory(slot: WatchSlot) {
           @remove="onRemove"
           @processes="openProcesses"
           @history="openHistory"
+          @pick="onPickSlot"
         />
       </v-col>
     </v-row>
     <WatchProcessDrawer v-model="processDrawer" :slot-data="processSlot" />
+    <WatchSlotPickDialog
+      v-model="showPickDialog"
+      :slot-index="pickSlotIndex"
+      :loading="pickLoading"
+      @pick="onPickServer"
+    />
   </div>
 </template>
diff --git a/frontend/src/components/watch/WatchSparkline.vue b/frontend/src/components/watch/WatchSparkline.vue
index d625c97e..499eaa72 100644
--- a/frontend/src/components/watch/WatchSparkline.vue
+++ b/frontend/src/components/watch/WatchSparkline.vue
@@ -52,5 +52,6 @@ const chartOption = computed(() => {
 <style scoped>
 .watch-sparkline {
   width: 100%;
+  pointer-events: none;
 }
 </style>
diff --git a/frontend/src/composables/useWatchPins.ts b/frontend/src/composables/useWatchPins.ts
index 2b5249df..d64189bb 100644
--- a/frontend/src/composables/useWatchPins.ts
+++ b/frontend/src/composables/useWatchPins.ts
@@ -157,10 +157,15 @@ async function refreshPins() {
   }
 }
 
-async function pinServer(serverId: number, replaceSlot?: number) {
+async function pinServer(
+  serverId: number,
+  opts?: number | { replaceSlot?: number; slotIndex?: number },
+) {
+  const options = typeof opts === 'number' ? { replaceSlot: opts } : opts
   try {
     const body: Record<string, number> = { server_id: serverId }
-    if (replaceSlot != null) body.replace_slot = replaceSlot
+    if (options?.replaceSlot != null) body.replace_slot = options.replaceSlot
+    if (options?.slotIndex != null) body.slot_index = options.slotIndex
     const data = await http.post<{ slots: WatchSlot[] }>('/watch/pins', body)
     applySlots(data)
     return { ok: true as const }
diff --git a/frontend/src/pages/ServersPage.vue b/frontend/src/pages/ServersPage.vue
index da815006..96759edf 100644
--- a/frontend/src/pages/ServersPage.vue
+++ b/frontend/src/pages/ServersPage.vue
@@ -809,7 +809,11 @@ const showReplacePin = ref(false)
 const replacePinServerId = ref<number | null>(null)
 
 async function onPinServer(item: ServerApiItem) {
-  if (pinnedMap.value[item.id] != null) return
+  const existingSlot = pinnedMap.value[item.id]
+  if (existingSlot != null) {
+    snackbar(`已在监测 · 槽 ${existingSlot + 1}`, 'info')
+    return
+  }
   pinLoadingId.value = item.id
   try {
     const res = await doPinServer(item.id)