fix(whatsapp): restrict voice_enabled? to embedded-signup whatsapp_cloud channels

app/models/channel/whatsapp.rb

@@ -41,8 +41,12 @@ class Channel::Whatsapp < ApplicationRecord
   end
 
   # Mirrors Channel::TwilioSms#voice_enabled? so the call subsystem can duck-type across providers.
+  # Meta's Calling API is only available via the embedded-signup whatsapp_cloud flow —
+  # 360dialog (default provider) and manual whatsapp_cloud setups can't reach the call APIs.
   def voice_enabled?
-    provider_config['calling_enabled'].present?
+    provider == 'whatsapp_cloud' &&
+      provider_config['source'] == 'embedded_signup' &&
+      provider_config['calling_enabled'].present?
   end
 
   def provider_service

spec/models/channel/whatsapp_spec.rb

@@ -209,4 +209,32 @@ RSpec.describe Channel::Whatsapp do
       end
     end
   end
+
+  describe '#voice_enabled?' do
+    let(:account) { create(:account) }
+
+    it 'returns true for embedded-signup whatsapp_cloud channels with calling_enabled' do
+      channel = create(:channel_whatsapp, account: account, provider: 'whatsapp_cloud',
+                                          validate_provider_config: false, sync_templates: false)
+      channel.update!(provider_config: channel.provider_config.merge('calling_enabled' => true))
+
+      expect(channel.voice_enabled?).to be true
+    end
+
+    it 'returns false for whatsapp_cloud channels without embedded_signup source' do
+      channel = create(:channel_whatsapp, account: account, provider: 'whatsapp_cloud',
+                                          validate_provider_config: false, sync_templates: false)
+      channel.update!(provider_config: channel.provider_config.merge('source' => 'manual', 'calling_enabled' => true))
+
+      expect(channel.voice_enabled?).to be false
+    end
+
+    it 'returns false for default-provider channels (360dialog) even with calling_enabled' do
+      channel = create(:channel_whatsapp, account: account, provider: 'default',
+                                          validate_provider_config: false, sync_templates: false)
+      channel.update!(provider_config: channel.provider_config.merge('calling_enabled' => true))
+
+      expect(channel.voice_enabled?).to be false
+    end
+  end
 end