feat: Add conversation delete feature (#11677)

<img width="1240" alt="Screenshot 2025-06-05 at 12 39 04 AM"
src="https://github.com/user-attachments/assets/0071cd23-38c3-4638-946e-f1fbd11ec845"
/>


## Changes

Give the admins an option to delete conversation via the context menu

- enable conversation deletion in routes and controller
- expose delete API on conversations
- add delete option in conversation context menu and integrate with card
and list
- implement store action and mutation for delete
- update i18n with new strings

fixes: https://github.com/chatwoot/chatwoot/issues/947

---------

Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

app/javascript/dashboard/i18n/locale/en/auditLogs.json

@@ -69,6 +69,9 @@
     },
     "ACCOUNT": {
       "EDIT": "{agentName} updated the account configuration (#{id})"
+    },
+    "CONVERSATION": {
+      "DELETE": "{agentName} deleted conversation #{id}"
     }
   }
 }

app/javascript/dashboard/i18n/locale/en/conversation.json

@@ -118,6 +118,11 @@
         "FAILED": "Couldn't change priority. Please try again."
       }
     },
+    "DELETE_CONVERSATION": {
+      "TITLE": "Delete conversation #{conversationId}",
+      "DESCRIPTION": "Are you sure you want to delete this conversation?",
+      "CONFIRM": "Delete"
+    },
     "CARD_CONTEXT_MENU": {
       "PENDING": "Mark as pending",
       "RESOLVED": "Mark as resolved",
@@ -134,6 +139,7 @@
       "ASSIGN_LABEL": "Assign label",
       "AGENTS_LOADING": "Loading agents...",
       "ASSIGN_TEAM": "Assign team",
+      "DELETE": "Delete conversation",
       "API": {
         "AGENT_ASSIGNMENT": {
           "SUCCESFUL": "Conversation id {conversationId} assigned to \"{agentName}\"",
@@ -208,6 +214,8 @@
     "ASSIGN_LABEL_SUCCESFUL": "Label assigned successfully",
     "ASSIGN_LABEL_FAILED": "Label assignment failed",
     "CHANGE_TEAM": "Conversation team changed",
+    "SUCCESS_DELETE_CONVERSATION": "Conversation deleted successfully",
+    "FAIL_DELETE_CONVERSATION": "Couldn't delete conversation! Try again",
     "FILE_SIZE_LIMIT": "File exceeds the {MAXIMUM_SUPPORTED_FILE_UPLOAD_SIZE} MB attachment limit",
     "MESSAGE_ERROR": "Unable to send this message, please try again later",
     "SENT_BY": "Sent by:",