fix: Use search API instead of filter in the filter in the endpoints (#13651)

- Replace `POST /contacts/filter` with `GET /contacts/search` for
contact lookup in compose new conversation
- Remove client-side input-type detection logic (`generateContactQuery`,
key filtering by email/phone/name) — the search API handles matching
across name, email, phone_number, and identifier server-side via a
single `ILIKE` query
- Filter the contacts with emails in cc and bcc fields.

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>

app/javascript/dashboard/components-next/NewConversation/components/ComposeNewConversationForm.vue

@@ -158,21 +158,7 @@ const isAnyDropdownActive = computed(() => {
 
 const handleContactSearch = value => {
   showContactsDropdown.value = true;
-  const query = typeof value === 'string' ? value.trim() : '';
-  const hasAlphabet = Array.from(query).some(char => {
-    const lower = char.toLowerCase();
-    const upper = char.toUpperCase();
-    return lower !== upper;
-  });
-  const isEmailLike = /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(query);
-
-  const keys = ['email', 'phone_number', 'name'].filter(key => {
-    if (key === 'phone_number' && hasAlphabet) return false;
-    if (key === 'name' && isEmailLike) return false;
-    return true;
-  });
-
-  emit('searchContacts', { keys, query: value });
+  emit('searchContacts', value);
 };
 
 const handleDropdownUpdate = (type, value) => {
@@ -187,12 +173,12 @@ const handleDropdownUpdate = (type, value) => {
 
 const searchCcEmails = value => {
   showCcEmailsDropdown.value = true;
-  emit('searchContacts', { keys: ['email'], query: value });
+  emit('searchContacts', value);
 };
 
 const searchBccEmails = value => {
   showBccEmailsDropdown.value = true;
-  emit('searchContacts', { keys: ['email'], query: value });
+  emit('searchContacts', value);
 };
 
 const setSelectedContact = async ({ value, action, ...rest }) => {