Refactored download monitor to handle error and timeout retries directly and consistently, removing legacy retry methods. Improved batch completion logic to ensure batches are only marked complete when all tasks are truly finished, preventing premature completion. Updated client-side polling to never stop automatically, using exponential backoff on failures, and fixed worker counting to exclude post-processing tasks. Enhanced post-processing and verification workflows to avoid double completion callbacks and ensure proper task state transitions.
Introduces a new post-processing workflow in web_server.py that verifies file existence and integrity before marking download tasks as completed. Updates status handling to include a 'post_processing' state and reflects this in the frontend UI, ensuring users see accurate progress and preventing premature completion status for downloads.
Adds server-side validation and healing for download batch worker counts to prevent ghost workers and orphaned tasks, including periodic batch state checks and recovery logic. Enhances thread safety with batch-specific locks and improves error handling in worker slot management. On the frontend, implements exponential backoff for polling failures, validates server responses, and logs worker count discrepancies for better debugging and UI consistency.
Introduces backend API and frontend integration for downloading missing tracks from artist albums and singles. Adds artist download bubbles, management modal, and related state/UI logic to script.js, with supporting styles in style.css. Also refactors some type hints in web_server.py for consistency.
