feat(platform): show deployment outbound IPs on adapter config forms

Cloud/NAT deployments couldn't complete WeCom-family / Official Account /
QQ Official setup because the trusted-IP (IP whitelist) value — the
server's egress IPs — was nowhere visible in LangBot.

- config.yaml: new system.outbound_ips list (env: SYSTEM__OUTBOUND_IPS,
  comma-separated), exposed via GET /api/v1/system/info
- dynamic form: generic __system.*-named display-only fields resolved
  from systemContext (same namespace as show_if), one read-only row per
  value with a copy button, excluded from form state and emitted values;
  hidden entirely when the deployment provides no IPs
- manifests: trusted-IP display field for wecom, wecomcs, wecombot,
  officialaccount, qqofficial

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/src/app/home/components/dynamic-form/DynamicFormItemConfig.ts

@@ -3,6 +3,7 @@ import {
   DynamicFormItemType,
   IDynamicFormItemOption,
   IShowIfCondition,
+  SYSTEM_FIELD_PREFIX,
 } from '@/app/infra/entities/form/dynamic';
 import { I18nObject } from '@/app/infra/entities/common';
 
@@ -50,6 +51,11 @@ export function getDefaultValues(
 ): Record<string, any> {
   return itemConfigList.reduce(
     (acc, item) => {
+      // `__system.*` fields are display-only (resolved from systemContext);
+      // their placeholder defaults must not leak into the config values.
+      if (item.name.startsWith(SYSTEM_FIELD_PREFIX)) {
+        return acc;
+      }
       acc[item.name] = item.default;
       return acc;
     },