ssb: Use message refs to get channel contents, not full-text search. Much faster for certain channels.

apps/ssb/tf-tab-news-feed.js

@@ -177,10 +177,10 @@ class TfTabNewsFeedElement extends LitElement {
 								WHERE messages.content ->> 'channel' = ?4
 							UNION
 							SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
-								FROM messages_fts(?5)
-								JOIN messages ON messages.rowid = messages_fts.rowid
+								FROM messages_refs
+								JOIN messages ON messages.id = messages_refs.message
 								JOIN json_each(?1) AS following ON messages.author = following.value
-								JOIN json_tree(messages.content, '$.mentions') AS mention ON mention.value = '#' || ?4
+								WHERE messages_refs.ref = '#' || ?4
 							)
 					SELECT TRUE AS is_primary, all_news.* FROM all_news
 						WHERE (?2 IS NULL OR all_news.timestamp >= ?2) AND all_news.timestamp < ?3
@@ -191,7 +191,6 @@ class TfTabNewsFeedElement extends LitElement {
 					start_time,
 					end_time,
 					this.hash.substring(2),
-					'"#' + this.hash.substring(2).replace('"', '""') + '"',
 				]
 			);
 			let t1 = new Date();