fix(search): ensure results are deduplicated

queries/views/feeds/search.sql

@@ -1,7 +1,7 @@
 CREATE OR REPLACE VIEW optimized_search_index AS
 WITH
   search_data AS (
-    SELECT
+    SELECT DISTINCT ON (p.url)
       p.title,
       p.url::TEXT AS url,
       p.description AS description,
@@ -15,7 +15,7 @@ WITH
     FROM
       optimized_posts p
     UNION ALL
-    SELECT
+    SELECT DISTINCT ON (l.link)
       CONCAT(l.title, ' via ', l.name) AS title,
       l.link::TEXT AS url,
       l.description AS description,
@@ -29,7 +29,7 @@ WITH
     FROM
       optimized_links l
     UNION ALL
-    SELECT
+    SELECT DISTINCT ON (b.url)
       CASE
         WHEN b.rating IS NOT NULL THEN CONCAT(b.title, ' (', b.rating, ')')
         ELSE b.title
@@ -48,11 +48,11 @@ WITH
     WHERE
       LOWER(b.status) = 'finished'
     UNION ALL
-    SELECT
+    SELECT DISTINCT ON (ar.url)
       ar.name AS title,
       ar.url::TEXT AS url,
       ar.description AS description,
-      ARRAY[ar.genre_name] AS tags,
+      ARRAY_REMOVE(ARRAY[NULLIF(ar.genre_name, '')], NULL) AS tags,
       CONCAT(
         COALESCE(ar.emoji, ar.genre_emoji, '🎧'),
         ' ',
@@ -66,7 +66,7 @@ WITH
     FROM
       optimized_artists ar
     UNION ALL
-    SELECT
+    SELECT DISTINCT ON (g.url)
       g.name AS title,
       g.url::TEXT AS url,
       g.description AS description,
@@ -80,7 +80,7 @@ WITH
     FROM
       optimized_genres g
     UNION ALL
-    SELECT
+    SELECT DISTINCT ON (s.url)
       CONCAT(s.title, ' (', s.year, ')') AS title,
       s.url::TEXT AS url,
       s.description AS description,
@@ -96,7 +96,7 @@ WITH
     WHERE
       s.last_watched_at IS NOT NULL
     UNION ALL
-    SELECT
+    SELECT DISTINCT ON (m.url)
       CASE
         WHEN m.rating IS NOT NULL THEN CONCAT(m.title, ' (', m.rating, ')')
         ELSE CONCAT(m.title, ' (', m.year, ')')