refactor: share config adapter allowFrom and defaultTo helpers

extensions/discord/src/channel.ts

@@ -2,6 +2,8 @@ import {
   buildAccountScopedDmSecurityPolicy,
   collectOpenGroupPolicyConfiguredRouteWarnings,
   formatAllowFromLowercase,
+  mapAllowFromEntries,
+  resolveOptionalConfigString,
 } from "openclaw/plugin-sdk";
 import {
   applyAccountNameToChannelSection,
@@ -114,12 +116,10 @@ export const discordPlugin: ChannelPlugin<ResolvedDiscordAccount> = {
       tokenSource: account.tokenSource,
     }),
     resolveAllowFrom: ({ cfg, accountId }) =>
-      (resolveDiscordAccount({ cfg, accountId }).config.dm?.allowFrom ?? []).map((entry) =>
-        String(entry),
-      ),
+      mapAllowFromEntries(resolveDiscordAccount({ cfg, accountId }).config.dm?.allowFrom),
     formatAllowFrom: ({ allowFrom }) => formatAllowFromLowercase({ allowFrom }),
     resolveDefaultTo: ({ cfg, accountId }) =>
-      resolveDiscordAccount({ cfg, accountId }).config.defaultTo?.trim() || undefined,
+      resolveOptionalConfigString(resolveDiscordAccount({ cfg, accountId }).config.defaultTo),
   },
   security: {
     resolveDmPolicy: ({ cfg, accountId, account }) => {