feat(dashboard): 拆分PR内容，专注于前端插件管理器界面修改，并解决与上游最新分支的冲突

Author: AstralSolipsism

dashboard/src/components/extension/mod-manager/BatchOperationBar.vue

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+<template>
+  <v-slide-y-transition>
+    <div v-if="visible" class="batch-operation-bar">
+      <v-toolbar
+        class="batch-operation-bar__toolbar"
+        color="surface"
+        density="comfortable"
+        elevation="8"
+      >
+        <div class="d-flex align-center flex-grow-1 ga-3 flex-wrap">
+          <div class="d-flex align-center">
+            <v-icon size="18" class="mr-2">mdi-checkbox-multiple-marked</v-icon>
+            <span class="text-body-2">已选择 {{ totalSelected }} 个插件</span>
+          </div>
+
+          <v-divider vertical class="mx-1" />
+
+          <div class="d-flex align-center ga-2 flex-wrap">
+            <v-btn
+              color="success"
+              size="small"
+              variant="flat"
+              :disabled="isBusy || selectedInactive.length === 0"
+              :loading="isBusy"
+              @click="handleBatchEnable"
+            >
+              <v-icon start size="18">mdi-play</v-icon>
+              批量启用
+              <span v-if="selectedInactive.length" class="ml-1">({{ selectedInactive.length }})</span>
+            </v-btn>
+
+            <v-btn
+              color="warning"
+              size="small"
+              variant="flat"
+              :disabled="isBusy || selectedActive.length === 0"
+              :loading="isBusy"
+              @click="handleBatchDisable"
+            >
+              <v-icon start size="18">mdi-pause</v-icon>
+              批量停用
+              <span v-if="selectedActive.length" class="ml-1">({{ selectedActive.length }})</span>
+            </v-btn>
+
+            <v-btn
+              color="primary"
+              size="small"
+              variant="flat"
+              :disabled="isBusy || updatablePlugins.length === 0"
+              :loading="isBusy"
+              @click="handleBatchUpdate"
+            >
+              <v-icon start size="18">mdi-update</v-icon>
+              批量更新
+              <span class="ml-1">({{ updatablePlugins.length }})</span>
+            </v-btn>
+
+            <v-btn
+              color="error"
+              size="small"
+              variant="flat"
+              :disabled="isBusy || uninstallablePlugins.length === 0"
+              :loading="isBusy"
+              @click="openUninstallConfirm"
+            >
+              <v-icon start size="18">mdi-delete</v-icon>
+              批量卸载
+              <span class="ml-1">({{ uninstallablePlugins.length }})</span>
+            </v-btn>
+          </div>
+        </div>
+
+        <v-spacer />
+
+        <v-btn
+          color="grey"
+          size="small"
+          variant="text"
+          :disabled="isBusy"
+          :loading="isBusy"
+          @click="emit('clear-selection')"
+        >
+          取消选择
+        </v-btn>
+      </v-toolbar>
+
+      <v-dialog v-model="showUninstallDialog" max-width="520">
+        <v-card>
+          <v-card-title class="text-h6 d-flex align-center">
+            <v-icon color="error" class="mr-2">mdi-delete-alert</v-icon>
+            确认卸载
+          </v-card-title>
+
+          <v-card-text>
+            <div>
+              确定要卸载选中的
+              <strong>{{ pendingUninstallNames.length }}</strong>
+              个插件吗？此操作不可撤销。
+            </div>
+            <div class="text-caption text-medium-emphasis mt-2">
+              系统插件（reserved）不会出现在可卸载列表中。
+            </div>
+
+            <v-alert
+              v-if="pendingUninstallNames.length === 0"
+              type="info"
+              variant="tonal"
+              density="compact"
+              class="mt-3"
+            >
+              当前选择中没有可卸载插件。
+            </v-alert>
+
+            <v-alert
+              v-else
+              type="warning"
+              variant="tonal"
+              density="compact"
+              class="mt-3"
+            >
+              将卸载 {{ pendingUninstallNames.length }} 个插件。
+            </v-alert>
+          </v-card-text>
+
+          <v-card-actions>
+            <v-spacer />
+            <v-btn
+              color="grey"
+              variant="text"
+              :disabled="isBusy"
+              @click="showUninstallDialog = false"
+            >
+              取消
+            </v-btn>
+            <v-btn
+              color="error"
+              variant="elevated"
+              :disabled="isBusy || pendingUninstallNames.length === 0"
+              :loading="isBusy"
+              @click="confirmBatchUninstall"
+            >
+              卸载
+            </v-btn>
+          </v-card-actions>
+        </v-card>
+      </v-dialog>
+    </div>
+  </v-slide-y-transition>
+</template>
+
+<script setup lang="ts">
+import { computed, ref } from 'vue'
+import type { PluginSummary } from './types'
+
+const props = defineProps<{
+  selectedInactive: PluginSummary[]
+  selectedActive: PluginSummary[]
+  busy?: boolean
+}>()
+
+const emit = defineEmits<{
+  (e: 'batch-enable', plugins: PluginSummary[]): void
+  (e: 'batch-disable', plugins: PluginSummary[]): void
+  (e: 'batch-update', names: string[]): void
+  (e: 'batch-uninstall', names: string[]): void
+  (e: 'clear-selection'): void
+}>()
+
+const isBusy = computed(() => props.busy ?? false)
+
+// 总选中数量
+const totalSelected = computed(
+  () => (props.selectedInactive?.length ?? 0) + (props.selectedActive?.length ?? 0)
+)
+
+// 是否显示（有选中项时显示）
+const visible = computed(() => totalSelected.value > 0)
+
+const allSelected = computed<PluginSummary[]>(() => [
+  ...(props.selectedInactive ?? []),
+  ...(props.selectedActive ?? []),
+])
+
+// 可更新的插件（选中的且has_update为true）
+const updatablePlugins = computed(() => {
+  const all = allSelected.value
+  return all.filter((p) => Boolean(p.has_update))
+})
+
+// 可卸载的插件（选中的且非系统插件）
+const uninstallablePlugins = computed(() => {
+  const all = allSelected.value
+  return all.filter((p) => !p.reserved)
+})
+
+const handleBatchEnable = () => emit('batch-enable', props.selectedInactive ?? [])
+const handleBatchDisable = () => emit('batch-disable', props.selectedActive ?? [])
+const handleBatchUpdate = () => emit('batch-update', updatablePlugins.value.map((p) => p.name))
+
+const showUninstallDialog = ref(false)
+const pendingUninstallNames = ref<string[]>([])
+
+const openUninstallConfirm = () => {
+  pendingUninstallNames.value = uninstallablePlugins.value.map((p) => p.name)
+  showUninstallDialog.value = true
+}
+
+const confirmBatchUninstall = () => {
+  const names = pendingUninstallNames.value
+  showUninstallDialog.value = false
+  if (names.length === 0) return
+  emit('batch-uninstall', names)
+}
+</script>
+
+<style scoped>
+.batch-operation-bar {
+  position: fixed;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  z-index: 1000;
+  padding: 12px;
+  padding-bottom: calc(12px + env(safe-area-inset-bottom));
+  pointer-events: none;
+}
+
+.batch-operation-bar__toolbar {
+  pointer-events: auto;
+  border-radius: 14px;
+  box-shadow: 0 -6px 22px rgba(0, 0, 0, 0.12);
+  border: 1px solid rgba(var(--v-border-color), var(--v-border-opacity));
+}
+</style>