fix(hooks): add isGroup and groupId to message:sent context

Adds group context fields to MessageSentHookContext so hooks can
correlate sent events with received events for the same conversation.

Previously, message:received included isGroup/groupId but message:sent
did not, forcing hooks to use mismatched identifiers (e.g. groupId vs
numeric chat ID) when tracking conversations.

Fields are derived from MsgContext in dispatch-from-config and threaded
through route-reply and deliver via the mirror parameter.

Addresses feedback from matskevich (production user, 550+ events)
reported on PR #6797.

src/auto-reply/reply/dispatch-from-config.ts

@@ -106,6 +106,9 @@ export async function dispatchReplyFromConfig(params: {
   const sessionKey = ctx.SessionKey;
   const startTime = diagnosticsEnabled ? Date.now() : 0;
   const canTrackSession = diagnosticsEnabled && Boolean(sessionKey);
+  const isGroup = Boolean(ctx.GroupSubject || ctx.GroupChannel);
+  const groupId =
+    ctx.From?.includes(":group:") || ctx.From?.includes(":channel:") ? ctx.From : undefined;
 
   const recordProcessed = (
     outcome: "completed" | "skipped" | "error",
@@ -291,6 +294,8 @@ export async function dispatchReplyFromConfig(params: {
       cfg,
       abortSignal,
       mirror,
+      isGroup,
+      groupId,
     });
     if (!result.ok) {
       logVerbose(`dispatch-from-config: route-reply failed: ${result.error ?? "unknown error"}`);
@@ -316,6 +321,8 @@ export async function dispatchReplyFromConfig(params: {
           accountId: ctx.AccountId,
           threadId: ctx.MessageThreadId,
           cfg,
+          isGroup,
+          groupId,
         });
         queuedFinal = result.ok;
         if (result.ok) {
@@ -499,6 +506,8 @@ export async function dispatchReplyFromConfig(params: {
           accountId: ctx.AccountId,
           threadId: ctx.MessageThreadId,
           cfg,
+          isGroup,
+          groupId,
         });
         if (!result.ok) {
           logVerbose(
@@ -549,6 +558,8 @@ export async function dispatchReplyFromConfig(params: {
               accountId: ctx.AccountId,
               threadId: ctx.MessageThreadId,
               cfg,
+              isGroup,
+              groupId,
             });
             queuedFinal = result.ok || queuedFinal;
             if (result.ok) {

src/auto-reply/reply/route-reply.ts

@@ -37,6 +37,10 @@ export type RouteReplyParams = {
   abortSignal?: AbortSignal;
   /** Mirror reply into session transcript (default: true when sessionKey is set). */
   mirror?: boolean;
+  /** Whether this message is being sent in a group/channel context */
+  isGroup?: boolean;
+  /** Group or channel identifier for correlation with received events */
+  groupId?: string;
 };
 
 export type RouteReplyResult = {
@@ -145,6 +149,8 @@ export async function routeReply(params: RouteReplyParams): Promise<RouteReplyRe
               agentId: resolvedAgentId,
               text,
               mediaUrls,
+              ...(params.isGroup != null ? { isGroup: params.isGroup } : {}),
+              ...(params.groupId ? { groupId: params.groupId } : {}),
             }
           : undefined,
     });