feat(dashboard): reading whispers is its own permission

chat_dms (GM 8) reads whispers; chat_private is now team and guild chat only.
Adds chat_flag and chat_flag_review (GM 3). Both can be granted per account or
character with the permission grants.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dDashboardServer/routes/ModerationTools.cpp

@@ -383,6 +383,7 @@ namespace {
 				IChatLog::ChatQuery query;
 				query.search = *word;
 				query.includePrivate = Can(context, "chat_private");
+				query.includeWhispers = Can(context, "chat_dms");
 				query.blockedOnly = allowed;
 				query.newestFirst = true;
 				query.limit = CHECK_MESSAGES;