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/server/src/modules/agent/subagents.ts

@@ -583,7 +583,7 @@ export function registerSubagentCapabilities(registry: CapabilityRegistry, ctx:
     const parent = await parentOf(ctx, c);
     const s = await ctx.settings.all();
     const cfg = subagentSettings(s);
-    if (!cfg.enabled) throw new CapabilityError("precondition", "子代理未开启(设置 → Agent → 允许子代理)");
+    if (!cfg.enabled) throw new CapabilityError("precondition", "子会话未开启(设置 → Agent → 允许子会话)");
     if (parent.cancel_requested_at || TERMINAL.includes(parent.status))
       throw new CapabilityError("precondition", "本会话已取消或已结束,不能派生子会话");
     const dedupeKey = `subagent:${c.idempotencyKey ?? `${parent.id}:${Date.now()}`}`;