feat(channel-monitor): apply template via subset picker; CC 2.1.114 baseline doc

Apply flow:
- POST /admin/channel-monitor-templates/:id/apply now requires monitor_ids
  (non-empty array). Service applies the template only to the selected
  subset, gated by AND template_id = :id (so users can't sneak in
  unrelated monitor IDs).
- New GET /admin/channel-monitor-templates/:id/monitors returns the
  associated monitor briefs (id/name/provider/enabled) for the picker.
- ApplyToMonitors signature gains monitorIDs []int64; empty list returns
  ErrChannelMonitorTemplateApplyEmpty.

Frontend:
- New MonitorTemplateApplyPickerDialog.vue: list of associated monitors
  with checkboxes (default all checked), 全选 / 全不选 shortcuts, live
  selected/total count. Submit calls apply(id, ids).
- MonitorTemplateManagerDialog replaces the old ConfirmDialog flow with
  the picker; onApplied refetches the list to refresh associated counts.

i18n: applyPicker* + common.selectAll keys.

chore: bump version to 0.1.114.33

The CC 2.1.114 (sdk-cli) UA / APIKeyBetaHeader / JSON metadata.user_id
baseline (already verified working via the in-process apply on prod
template id=1) is documented in internal/pkg/claude/constants.go and
is what the seed template in the manager UI should follow.

frontend/src/i18n/locales/zh.ts

@@ -273,6 +273,7 @@ export default {
     no: '否',
     all: '全部',
     none: '无',
+    selectAll: '全选',
     noData: '暂无数据',
     expand: '展开',
     collapse: '收起',
@@ -2276,6 +2277,12 @@ export default {
         applyConfirm: '确认应用',
         applyConfirmMessage: '将把模板「{name}」的当前配置覆盖到 {n} 个关联监控。监控本地已编辑的自定义修改会被丢弃，是否继续？',
         applySuccess: '已应用到 {n} 个监控',
+        applyPickerTitle: '应用模板「{name}」',
+        applyPickerHint: '勾选要覆盖请求头/请求体的监控（默认全选）。监控本地已编辑的自定义修改会被丢弃。',
+        applyPickerEmpty: '当前模板没有关联监控',
+        applyPickerConfirm: '应用到 {n} 个监控',
+        selectNone: '全不选',
+        selectedCount: '已选 {n} / {total}',
         deleteConfirm: '确定要删除模板「{name}」吗？{n} 个关联监控会解除关联但保留自己的快照继续工作。',
         associatedCount: '{n} 个关联监控',
         headersSummary: '{n} 个自定义请求头',