fix(api): episode rows need a token beyond series title

Per amended DESIGN.md 9.2, an episode row now also requires at
least one query token to match the episode title on its own, so
a series-title-only query lists the series and no episodes.

.sqlx/query-80399f9c14b159b5c4883aaeae370a7869d1104dfd80dc3a568ef134c4659ca9.json

@@ -1,6 +1,6 @@
 {
   "db_name": "SQLite",
-  "query": "SELECT e.id AS \"episode_id!: i64\", s.id AS \"series_id!: i64\", s.title AS \"series_title!: String\", printf('S%02dE%02d', se.number, e.number) AS \"tag!: String\", e.title AS \"title!: String\", s.poster_path, s.vote_average, s.tmdb_id AS \"series_tmdb_id!: i64\" FROM episodes e JOIN seasons se ON se.id = e.season_id JOIN series s ON s.id = se.series_id WHERE NOT EXISTS (SELECT 1 FROM json_each(?) token WHERE (s.title || ' ' || e.title) NOT LIKE '%' || token.value || '%' ESCAPE '\\') ORDER BY s.title, se.number, e.number, e.id",
+  "query": "SELECT e.id AS \"episode_id!: i64\", s.id AS \"series_id!: i64\", s.title AS \"series_title!: String\", printf('S%02dE%02d', se.number, e.number) AS \"tag!: String\", e.title AS \"title!: String\", s.poster_path, s.vote_average, s.tmdb_id AS \"series_tmdb_id!: i64\" FROM episodes e JOIN seasons se ON se.id = e.season_id JOIN series s ON s.id = se.series_id WHERE NOT EXISTS (SELECT 1 FROM json_each(?) token WHERE (s.title || ' ' || e.title) NOT LIKE '%' || token.value || '%' ESCAPE '\\') AND EXISTS (SELECT 1 FROM json_each(?) token WHERE e.title LIKE '%' || token.value || '%' ESCAPE '\\') ORDER BY s.title, se.number, e.number, e.id",
   "describe": {
     "columns": [
       {
@@ -45,7 +45,7 @@
       }
     ],
     "parameters": {
-      "Right": 1
+      "Right": 2
     },
     "nullable": [
       true,
@@ -58,5 +58,5 @@
       false
     ]
   },
-  "hash": "2bc048c0fca4822eb38befbe3091f44f961fafb79432d4771aa48e36d32bf2a2"
+  "hash": "80399f9c14b159b5c4883aaeae370a7869d1104dfd80dc3a568ef134c4659ca9"
 }

crates/arr-api/src/search.rs

@@ -233,9 +233,11 @@ pub async fn search(
     library.extend(series_rows.into_iter().map(LibraryResult::Series));
 
     // §9.2 names the TV case explicitly: `bluey hospital` finds the episode.
-    // Tokens may split across the series and episode titles, so the haystack
+    // Tokens may split across the series and episode titles, so every token
-    // is both joined and every token must land somewhere in it.
+    // must land in the concatenation — and at least one must match the
-    let episode_rows = sqlx::query_as!(LibraryEpisode, r#"SELECT e.id AS "episode_id!: i64", s.id AS "series_id!: i64", s.title AS "series_title!: String", printf('S%02dE%02d', se.number, e.number) AS "tag!: String", e.title AS "title!: String", s.poster_path, s.vote_average, s.tmdb_id AS "series_tmdb_id!: i64" FROM episodes e JOIN seasons se ON se.id = e.season_id JOIN series s ON s.id = se.series_id WHERE NOT EXISTS (SELECT 1 FROM json_each(?) token WHERE (s.title || ' ' || e.title) NOT LIKE '%' || token.value || '%' ESCAPE '\') ORDER BY s.title, se.number, e.number, e.id"#, tokens)
+    // episode title on its own, or a series-title-only query would list
+    // every episode the series has.
+    let episode_rows = sqlx::query_as!(LibraryEpisode, r#"SELECT e.id AS "episode_id!: i64", s.id AS "series_id!: i64", s.title AS "series_title!: String", printf('S%02dE%02d', se.number, e.number) AS "tag!: String", e.title AS "title!: String", s.poster_path, s.vote_average, s.tmdb_id AS "series_tmdb_id!: i64" FROM episodes e JOIN seasons se ON se.id = e.season_id JOIN series s ON s.id = se.series_id WHERE NOT EXISTS (SELECT 1 FROM json_each(?) token WHERE (s.title || ' ' || e.title) NOT LIKE '%' || token.value || '%' ESCAPE '\') AND EXISTS (SELECT 1 FROM json_each(?) token WHERE e.title LIKE '%' || token.value || '%' ESCAPE '\') ORDER BY s.title, se.number, e.number, e.id"#, tokens, tokens)
         .fetch_all(database.pool())
         .await?;
     library.extend(episode_rows.into_iter().map(LibraryResult::Episode));
@@ -956,15 +958,32 @@ mod tests {
         assert_eq!(response["tmdb"][0]["kind"], "series");
         assert_eq!(response["tmdb"][0]["title"], "Bluey");
 
+        // §9.2, amended: an episode row surfaces only when the query matches
+        // something beyond the series title. `bluey` alone returns the series
+        // row and no episode below it.
         let response: serde_json::Value = reqwest::get(format!("{base}/api/search?q=bluey"))
             .await
             .expect("search")
             .json()
             .await
             .expect("json");
-        assert_eq!(response["library"][0]["kind"], "series");
+        let library = response["library"].as_array().expect("library");
-        assert_eq!(response["library"][0]["title"], "Bluey");
+        assert_eq!(library.len(), 1);
-        assert_eq!(response["library"][0]["tmdb_id"], 82_728);
+        assert_eq!(library[0]["kind"], "series");
+        assert_eq!(library[0]["title"], "Bluey");
+        assert_eq!(library[0]["tmdb_id"], 82_728);
+
+        // An episode-title-only query still finds the episode.
+        let response: serde_json::Value = reqwest::get(format!("{base}/api/search?q=hospital"))
+            .await
+            .expect("search")
+            .json()
+            .await
+            .expect("json");
+        let library = response["library"].as_array().expect("library");
+        assert_eq!(library.len(), 1);
+        assert_eq!(library[0]["kind"], "episode");
+        assert_eq!(library[0]["title"], "Hospital");
     }
 
     #[tokio::test]