feat: distinguish agent-declined calls with a rejected status (#14783)

## Linear ticket
-
https://linear.app/chatwoot/issue/CW-7374/agent-declined-voice-calls-miscounted-as-failed

## Description

Agent rejections were stored with status: failed, so call reports lumped
deliberate declines together with real technical failure.

Fix: give declines their own terminal rejected status (Twilio + WhatsApp
paths), keeping end_reason: agent_rejected. Genuine provider/network
failures stay failed. Frontend renders declines exactly as before;
existing rows backfilled via migration.

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

- Tested on UI

## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Sony Mathew <sony@chatwoot.com>

app/javascript/dashboard/components-next/Conversation/ConversationCard/VoiceCallStatus.vue

@@ -20,6 +20,7 @@ const ICON_MAP = {
   [VOICE_CALL_STATUS.IN_PROGRESS]: 'i-ph-phone-call',
   [VOICE_CALL_STATUS.NO_ANSWER]: 'i-ph-phone-x',
   [VOICE_CALL_STATUS.FAILED]: 'i-ph-phone-x',
+  [VOICE_CALL_STATUS.REJECTED]: 'i-ph-phone-x',
 };
 
 const COLOR_MAP = {
@@ -28,13 +29,18 @@ const COLOR_MAP = {
   [VOICE_CALL_STATUS.COMPLETED]: 'text-n-slate-11',
   [VOICE_CALL_STATUS.NO_ANSWER]: 'text-n-ruby-9',
   [VOICE_CALL_STATUS.FAILED]: 'text-n-ruby-9',
+  [VOICE_CALL_STATUS.REJECTED]: 'text-n-ruby-9',
 };
 
 const isOutbound = computed(
   () => props.direction === VOICE_CALL_DIRECTION.OUTBOUND
 );
 const isFailed = computed(() =>
-  [VOICE_CALL_STATUS.NO_ANSWER, VOICE_CALL_STATUS.FAILED].includes(props.status)
+  [
+    VOICE_CALL_STATUS.NO_ANSWER,
+    VOICE_CALL_STATUS.FAILED,
+    VOICE_CALL_STATUS.REJECTED,
+  ].includes(props.status)
 );
 
 const labelKey = computed(() => {

app/javascript/dashboard/components-next/message/bubbles/VoiceCall.vue

@@ -34,6 +34,7 @@ const ICON_MAP = {
   [VOICE_CALL_STATUS.COMPLETED]: 'i-ph-phone-bold',
   [VOICE_CALL_STATUS.NO_ANSWER]: 'i-ph-phone-x-bold',
   [VOICE_CALL_STATUS.FAILED]: 'i-ph-phone-x-bold',
+  [VOICE_CALL_STATUS.REJECTED]: 'i-ph-phone-x-bold',
 };
 
 const { t } = useI18n();
@@ -81,7 +82,11 @@ const isWhatsapp = computed(
   () => call.value?.provider === VOICE_CALL_PROVIDERS.WHATSAPP
 );
 const isFailed = computed(() =>
-  [VOICE_CALL_STATUS.NO_ANSWER, VOICE_CALL_STATUS.FAILED].includes(status.value)
+  [
+    VOICE_CALL_STATUS.NO_ANSWER,
+    VOICE_CALL_STATUS.FAILED,
+    VOICE_CALL_STATUS.REJECTED,
+  ].includes(status.value)
 );
 const isMissedInbound = computed(() => isFailed.value && !isOutbound.value);
 const endReason = computed(() => call.value?.endReason);

app/javascript/dashboard/components-next/message/constants.js

@@ -90,6 +90,7 @@ export const VOICE_CALL_STATUS = {
   COMPLETED: 'completed',
   NO_ANSWER: 'no-answer',
   FAILED: 'failed',
+  REJECTED: 'rejected',
 };
 
 export const VOICE_CALL_DIRECTION = {

app/javascript/dashboard/components/widgets/conversation/VoiceCallStatus.vue

@@ -21,6 +21,7 @@ const ICON_MAP = {
   [VOICE_CALL_STATUS.IN_PROGRESS]: 'i-ph-phone-call',
   [VOICE_CALL_STATUS.NO_ANSWER]: 'i-ph-phone-x',
   [VOICE_CALL_STATUS.FAILED]: 'i-ph-phone-x',
+  [VOICE_CALL_STATUS.REJECTED]: 'i-ph-phone-x',
 };
 
 const COLOR_MAP = {
@@ -29,13 +30,18 @@ const COLOR_MAP = {
   [VOICE_CALL_STATUS.COMPLETED]: 'text-n-slate-11',
   [VOICE_CALL_STATUS.NO_ANSWER]: 'text-n-ruby-9',
   [VOICE_CALL_STATUS.FAILED]: 'text-n-ruby-9',
+  [VOICE_CALL_STATUS.REJECTED]: 'text-n-ruby-9',
 };
 
 const isOutbound = computed(
   () => props.direction === VOICE_CALL_DIRECTION.OUTBOUND
 );
 const isFailed = computed(() =>
-  [VOICE_CALL_STATUS.NO_ANSWER, VOICE_CALL_STATUS.FAILED].includes(props.status)
+  [
+    VOICE_CALL_STATUS.NO_ANSWER,
+    VOICE_CALL_STATUS.FAILED,
+    VOICE_CALL_STATUS.REJECTED,
+  ].includes(props.status)
 );
 
 const labelKey = computed(() => {

app/javascript/dashboard/helper/voice.js

@@ -7,6 +7,7 @@ export const TERMINAL_STATUSES = [
   'completed',
   'busy',
   'failed',
+  'rejected',
   'no-answer',
   'canceled',
   'missed',