improve activity tab performance by adding indexes

src/services/database/index.js

@@ -72,6 +72,9 @@ const database = {
         await sqliteService.executeNonQuery(
             `CREATE TABLE IF NOT EXISTS ${dbVars.userPrefix}_feed_online_offline (id INTEGER PRIMARY KEY, created_at TEXT, user_id TEXT, display_name TEXT, type TEXT, location TEXT, world_name TEXT, time INTEGER, group_name TEXT)`
         );
+        await sqliteService.executeNonQuery(
+            `CREATE INDEX IF NOT EXISTS ${dbVars.userPrefix}_feed_online_offline_user_created_idx ON ${dbVars.userPrefix}_feed_online_offline (user_id, created_at)`
+        );
         await sqliteService.executeNonQuery(
             `CREATE TABLE IF NOT EXISTS ${dbVars.userPrefix}_activity_cache_meta (user_id TEXT PRIMARY KEY, updated_at TEXT, is_self INTEGER DEFAULT 0, source_last_created_at TEXT, pending_session_start_at INTEGER)`
         );