feat(pool): 号池额度主动探测、封禁自动清除、调度硬优先级与前端重构

- 新增 PoolQuotaProbeScheduler，按 probing_interval_minutes 主动探测静默 Key 额度
- pool_advanced 增加 probing_enabled / auto_remove_banned_keys 配置项
- error_handler 和 quota_service 支持封禁 Key 自动删除及缓存清理
- multi_score 策略从加权混合重构为硬优先级排序，引入 mutex_group 互斥组
- 指纹注入从 handler 层下移至 ClaudeCode envelope 层
- OAuth 批量导入支持 concurrency 并发参数
- 前端号池管理拆分高级设置/账号批量/代理设置为独立组件
- 号池总览接口精简，仅返回已启用调度的 Provider

frontend/src/components/common/MultiSelect.vue

@@ -0,0 +1,110 @@
+<template>
+  <div class="relative">
+    <button
+      type="button"
+      :class="cn(
+        'h-9 px-3 border rounded-lg bg-background text-left flex items-center justify-between hover:bg-muted/50 transition-colors gap-1',
+        triggerClass,
+      )"
+      :disabled="disabled"
+      @click="isOpen = !isOpen"
+    >
+      <span
+        :class="modelValue.length ? 'text-foreground' : 'text-muted-foreground'"
+        class="text-xs truncate"
+      >
+        {{ displayText }}
+      </span>
+      <ChevronDown
+        class="h-3.5 w-3.5 shrink-0 text-muted-foreground transition-transform"
+        :class="isOpen ? 'rotate-180' : ''"
+      />
+    </button>
+    <div
+      v-if="isOpen"
+      class="fixed inset-0 z-[80]"
+      @click.stop="isOpen = false"
+    />
+    <div
+      v-if="isOpen"
+      class="absolute z-[90] w-full mt-1 bg-popover border rounded-lg shadow-lg max-h-48 overflow-y-auto"
+      :style="dropdownMinWidth ? { minWidth: dropdownMinWidth } : undefined"
+    >
+      <div
+        v-for="item in options"
+        :key="item.value"
+        class="flex items-center gap-2 px-3 py-1.5 hover:bg-muted/50 cursor-pointer text-xs"
+        @click="toggle(item.value)"
+      >
+        <input
+          type="checkbox"
+          :checked="modelValue.includes(item.value)"
+          class="h-4 w-4 rounded border-border/60 bg-card/80 text-primary shadow-sm accent-primary cursor-pointer"
+          @click.stop
+          @change="toggle(item.value)"
+        >
+        <span class="text-sm">{{ item.label }}</span>
+      </div>
+      <div
+        v-if="options.length === 0"
+        class="px-3 py-2 text-sm text-muted-foreground"
+      >
+        {{ emptyText }}
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref } from 'vue'
+import { ChevronDown } from 'lucide-vue-next'
+import { cn } from '@/lib/utils'
+
+export interface MultiSelectOption {
+  value: string
+  label: string
+}
+
+const props = withDefaults(defineProps<{
+  modelValue: string[]
+  options: MultiSelectOption[]
+  placeholder?: string
+  emptyText?: string
+  triggerClass?: string
+  dropdownMinWidth?: string
+  disabled?: boolean
+}>(), {
+  placeholder: '请选择',
+  emptyText: '暂无选项',
+  triggerClass: '',
+  dropdownMinWidth: undefined,
+  disabled: false,
+})
+
+const emit = defineEmits<{
+  'update:modelValue': [value: string[]]
+}>()
+
+const isOpen = ref(false)
+
+const displayText = computed(() => {
+  if (props.modelValue.length === 0) return props.placeholder
+  if (props.modelValue.length <= 2) {
+    return props.modelValue
+      .map(v => props.options.find(o => o.value === v)?.label ?? v)
+      .join(', ')
+  }
+  return `已选择 ${props.modelValue.length} 项`
+})
+
+function toggle(value: string) {
+  const newValue = [...props.modelValue]
+  const index = newValue.indexOf(value)
+  if (index === -1) {
+    newValue.push(value)
+  } else {
+    newValue.splice(index, 1)
+  }
+  emit('update:modelValue', newValue)
+}
+</script>

frontend/src/components/common/index.ts

@@ -10,4 +10,5 @@ export { default as LoadingState } from './LoadingState.vue'
 
 // 表单组件
 export { default as ModelMultiSelect } from './ModelMultiSelect.vue'
+export { default as MultiSelect } from './MultiSelect.vue'
 export { default as TimeRangePicker } from './TimeRangePicker.vue'