Improve title handling and rework catalog builder

crates/cli/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "flix-cli"
-version = "0.0.19"
+version = "0.0.20"
 license-file.workspace = true
 
 description = "CLI for interacting with a flix database"

crates/cli/src/run/tmdb.rs

@@ -50,10 +50,19 @@ pub async fn add(
 			let fs_slug = overrides
 				.fs_slug
 				.unwrap_or_else(|| text::make_fs_slug(&title));
-			let web_slug = overrides
+			let mut web_slug = overrides
 				.web_slug
 				.unwrap_or_else(|| text::make_web_slug(&title));
 
+			const COLLECTION_SUFFIX_TO_REMOVE: &str = "-collection";
+			if web_slug.ends_with(COLLECTION_SUFFIX_TO_REMOVE) {
+				web_slug.truncate(
+					web_slug
+						.len()
+						.saturating_sub(COLLECTION_SUFFIX_TO_REMOVE.len()),
+				);
+			}
+
 			let result: Result<CollectionId, TransactionError<DbErr>> = db
 				.transaction(|txn| {
 					let title = title.clone();