feat(messages): add whatsapp messagePrefix and responsePrefix auto

src/web/accounts.ts

@@ -15,6 +15,7 @@ export type ResolvedWhatsAppAccount = {
   accountId: string;
   name?: string;
   enabled: boolean;
+  messagePrefix?: string;
   authDir: string;
   isLegacyAuthDir: boolean;
   selfChatMode?: boolean;
@@ -111,6 +112,10 @@ export function resolveWhatsAppAccount(params: {
     accountId,
     name: accountCfg?.name?.trim() || undefined,
     enabled,
+    messagePrefix:
+      accountCfg?.messagePrefix ??
+      params.cfg.whatsapp?.messagePrefix ??
+      params.cfg.messages?.messagePrefix,
     authDir,
     isLegacyAuthDir: isLegacy,
     selfChatMode: accountCfg?.selfChatMode ?? params.cfg.whatsapp?.selfChatMode,

src/web/auto-reply.ts

@@ -784,6 +784,7 @@ export async function monitorWebProvider(
     ...baseCfg,
     whatsapp: {
       ...baseCfg.whatsapp,
+      messagePrefix: account.messagePrefix,
       allowFrom: account.allowFrom,
       groupAllowFrom: account.groupAllowFrom,
       groupPolicy: account.groupPolicy,
@@ -1039,8 +1040,9 @@ export async function monitorWebProvider(
     };
 
     const buildLine = (msg: WebInboundMsg, agentId: string) => {
-      // Build message prefix: explicit config > identity name > default based on allowFrom
+      // WhatsApp inbound prefix: whatsapp.messagePrefix > legacy messages.messagePrefix > identity/defaults
       const messagePrefix = resolveMessagePrefix(cfg, agentId, {
+        configured: cfg.whatsapp?.messagePrefix,
         hasAllowFrom: (cfg.whatsapp?.allowFrom?.length ?? 0) > 0,
       });
       const prefixStr = messagePrefix ? `${messagePrefix} ` : "";