fix: clarify why SMS delivery is skipped when a channel gate is off

Surface env vs dashboard disable reasons in SMS logs so password reset and other sends are easier to diagnose when only one layer is enabled.

components/settings/messagingFlags.js

@@ -4,7 +4,7 @@ const config = require('../../config/config');
 const logger = require('../../utils/logger');
 const { Setting, SETTINGS_KEY } = require('./settingModel');
 const {
-  isChannelEnabled,
+  isDbChannelEnabled,
   isEnvChannelEnabled,
   toPublicMessaging
 } = require('../../utils/messagingChannels');
@@ -35,20 +35,46 @@ const invalidateMessagingCache = () => {
   cacheAt = 0;
 };
 
-const isMessagingChannelEnabled = async (channel) => {
-  if (!isEnvChannelEnabled(channel, config)) return false;
+const getMessagingChannelState = async (channel) => {
+  const envEnabled = isEnvChannelEnabled(channel, config);
+  if (!envEnabled) {
+    return {
+      enabled: false,
+      envEnabled: false,
+      dbEnabled: null,
+      blockReason: 'env_disabled'
+    };
+  }
+
   try {
     const db = await getDbMessagingFlags();
-    return isChannelEnabled(channel, { env: config, db });
+    const dbEnabled = isDbChannelEnabled(channel, db);
+    return {
+      enabled: dbEnabled,
+      envEnabled: true,
+      dbEnabled,
+      blockReason: dbEnabled ? null : 'dashboard_disabled'
+    };
   } catch (err) {
     logger.warn(`[Messaging] Failed to read settings for ${channel}, using env only: ${err.message}`);
-    return true;
+    return {
+      enabled: true,
+      envEnabled: true,
+      dbEnabled: null,
+      blockReason: null
+    };
   }
 };
 
+const isMessagingChannelEnabled = async (channel) => {
+  const state = await getMessagingChannelState(channel);
+  return state.enabled;
+};
+
 const getPublicMessaging = (doc) => toPublicMessaging(readDbFlags(doc), config);
 
 module.exports = {
+  getMessagingChannelState,
   isMessagingChannelEnabled,
   invalidateMessagingCache,
   getPublicMessaging,