feat: improve mention search results

package-lock.json

@@ -31,6 +31,7 @@
         "dataloader": "^2.2.3",
         "dayjs": "^1.11.13",
         "embla-carousel-react": "^8.5.1",
+        "flexsearch": "^0.7.43",
         "i18next": "^24.2.0",
         "lru-cache": "^11.0.2",
         "lucide-react": "^0.469.0",
@@ -5731,6 +5732,11 @@
       "integrity": "sha512-AiwGJM8YcNOaobumgtng+6NHuOqC3A7MixFeDafM3X9cIUM+xUXoS5Vfgf+OihAYe20fxqNM9yPBXJzRtZ/4eA==",
       "dev": true
     },
+    "node_modules/flexsearch": {
+      "version": "0.7.43",
+      "resolved": "https://registry.npmjs.org/flexsearch/-/flexsearch-0.7.43.tgz",
+      "integrity": "sha512-c5o/+Um8aqCSOXGcZoqZOm+NqtVwNsvVpWv6lfmSclU954O3wvQKxxK8zj74fPaSJbXpSLTs4PRhh+wnoCXnKg=="
+    },
     "node_modules/for-each": {
       "version": "0.3.3",
       "resolved": "https://registry.npmjs.org/for-each/-/for-each-0.3.3.tgz",