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>

src/langbot/pkg/api/http/controller/groups/system.py

@@ -31,6 +31,18 @@ class SystemRouterGroup(group.RouterGroup):
             except Exception:
                 pass
 
+            # ``system.outbound_ips`` may be a comma-separated string instead of
+            # a list when injected via the SYSTEM__OUTBOUND_IPS env var into a
+            # pre-existing data/config.yaml that lacks the key (env overrides
+            # only coerce to list when the key already holds one).
+            outbound_ips = self.ap.instance_config.data.get('system', {}).get('outbound_ips', [])
+            if isinstance(outbound_ips, str):
+                outbound_ips = [ip.strip() for ip in outbound_ips.split(',') if ip.strip()]
+            elif isinstance(outbound_ips, list):
+                outbound_ips = [str(ip).strip() for ip in outbound_ips if str(ip).strip()]
+            else:
+                outbound_ips = []
+
             return self.success(
                 data={
                     'version': constants.semantic_version,
@@ -49,6 +61,7 @@ class SystemRouterGroup(group.RouterGroup):
                         'disable_models_service', False
                     ),
                     'limitation': self.ap.instance_config.data.get('system', {}).get('limitation', {}),
+                    'outbound_ips': outbound_ips,
                     'wizard_status': wizard_status,
                     'wizard_progress': wizard_progress,
                 }