copy: second-round copy review across console, settings, agent and server messages

- Trim descriptions, empty states, confirm buttons and toasts to facts
- Unify terms per glossary: 待处理/待识别/整理记录/运行记录/凭证/子会话/Agent 上游
- Subscription-login termsNote states facts only (borrowed client identity, ToS/ban risk)
- Shorter, concrete goal templates for built-in Agent checks
- Human-readable nouns instead of table names in instance CRUD errors
- Audit labels for pi_upstream / schedule / automation_grant actions
- Glossary: add 上游、订阅登录、凭证、定时任务、巡检、运行记录、子会话、停止、持续授权

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/settings/instances.tsx

@@ -87,7 +87,7 @@ function DownloadersTable() {
       config={{
         noun: "下载器实例",
         description:
-          "只接管带管理标签的任务。多个实例共用一块缓存盘时填相同的缓存卷标识,水位合并计算。点行编辑实例和它的路径映射。",
+          "只接管带管理标签的任务。多个实例共用一块缓存盘时填相同的缓存卷标识,水位合并计算。点行编辑实例和路径映射。",
         emptyHint: "添加 qBittorrent 后才能提交下载。",
         drawerExtra: (r) => <PathMappingsPanel viewKind="downloader" instanceId={r.id} />,
         columns: [
@@ -181,7 +181,7 @@ function MediaServersTable() {
       hooks={{ list, create, update, remove } as never}
       config={{
         noun: "媒体服务器",
-        description: "只用来查询作品有无、季集和版本;查不到不等于缺失。点行编辑实例和它的路径映射。",
+        description: "只用来查询作品有无、季集和版本;查不到不等于缺失。点行编辑实例和路径映射。",
         drawerExtra: (r) => <PathMappingsPanel viewKind="media_server" instanceId={r.id} />,
         columns: [
           {