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/not-found.tsx

@@ -7,7 +7,7 @@ export default function NotFound() {
     <div className="grid min-h-screen place-items-center bg-background px-4">
       <EmptyState
         title="页面不存在"
-        description="检查地址是否正确，或回到首页。"
+        description="检查地址,或回到首页。"
         action={
           <Link to="/console" className={buttonVariants({ variant: "outline" })}>
             回到首页