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/routes/console/sources.tsx

@@ -84,7 +84,7 @@ export default function SourcesPage() {
     <>
       <PageHeader
         title="来源健康"
-        description="单个站点的快照、Feed 与账号在站点工作台。"
+        description="单个站点的快照、Feed 和账号在站点工作台管理。"
         actions={
           <Button size="sm" onClick={() => setCreating(true)}>
             <Plus />