feat: Add global message search (#1385)

* feat: Search messages by content

* Fix search UI

* Add specs

* chore: Filter search results

* Update highlight logic

* Rename query to searchTerm

Co-authored-by: Sojan <sojan@pepalo.com>

app/javascript/dashboard/api/inbox/conversation.js

@@ -18,6 +18,15 @@ class ConversationApi extends ApiClient {
     });
   }
 
+  search({ q }) {
+    return axios.get(`${this.url}/search`, {
+      params: {
+        q,
+        page: 1,
+      },
+    });
+  }
+
   toggleStatus(conversationId) {
     return axios.post(`${this.url}/${conversationId}/toggle_status`, {});
   }