Import issue history in backlog.md

2026-04-20 10:01:47 +01:00
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+---
+id: ML-69
+title: ArgumentError raises in ScrobbleActivity
+status: To Do
+assignee: []
+created_date: '2026-04-20 08:55'
+labels: []
+dependencies: []
+references:
+  - 'https://github.com/cloud8421/music_library/issues/106'
+priority: low
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+_GitHub: created 2026-03-12 · updated 2026-04-09 · closed 2026-03-14 · not planned_
+
+## Description
+
+`lib/music_library/scrobble_activity.ex:19,61,116` raises `ArgumentError` when both `started_at` and `finished_at` are provided to scrobble functions. Per Elixir conventions, public API functions should return `{:error, _}` tuples for input validation rather than raising. These functions are called from LiveComponent event handlers where a crash would kill the LiveView process.
+
+## Expected behavior
+
+Return `{:error, :invalid_options}` (or similar) and handle upstream with a user-facing toast message.
+
+## Source
+
+From technical debt audit (2026-03-12).
+<!-- SECTION:DESCRIPTION:END -->