music_library/backlog/tasks/ml-169.9 - Fix-Full-stream-resets-on-pagination-within-same-search.md

id, title, status, assignee, created_date, labels, dependencies, references, modified_files, parent_task_id, priority, ordinal

id	title	status	assignee	created_date	labels	dependencies	references	modified_files	parent_task_id	priority	ordinal
ML-169.9	Fix: Full stream resets on pagination within same search	To Do		2026-05-19 11:48	perf fix		backlog/documents/doc-27 - Phase-4-Performance-Audit-Low-Hanging-Fruit-Findings.md	lib/music_library_web/live_helpers/index_actions.ex lib/music_library_web/live/scrobbled_tracks_live/index.ex lib/music_library_web/live/artist_live/show.ex	ML-169	medium	30000

Description

Optimize stream behavior so that pagination within the same search does not trigger a full stream(..., reset: true). Search and order changes still legitimately need resets.

Problem

Every search query change, order toggle, or pagination click triggers a full stream(..., reset: true). While reset: true is correct when the entire dataset changes (new search query), it's unnecessary for pagination within the same search — the existing items don't change, only new ones are appended.

Files

• lib/music_library_web/live_helpers/index_actions.ex:89 — load_and_assign_records uses reset: true
• lib/music_library_web/live/scrobbled_tracks_live/index.ex:334 — load_and_assign_tracks uses reset: true
• lib/music_library_web/live/artist_live/show.ex:698-699 — assign_records uses reset: true

Fix

Use stream(..., at: -1) (append) for "load more" pagination. Only use reset: true when search text or order field changes. This requires distinguishing between a "new search" and "same search, next page" in the pagination handler.

Acceptance Criteria

• #1 Pagination to next page appends records without full stream reset
• #2 Existing stream items remain visible during pagination
• #3 Search query change still triggers full stream reset
• #4 Order change still triggers full stream reset
• #5 No duplicate records appear after multiple pagination clicks