v0.8.6

Database Integration for Downloaded Files

• SQLite Database Added:
  A SQLite database (downloads.db) is now used to record downloaded files instead of scanning the local filesystem.
• Database Location:
  The database is created in the resources/config/ directory.
• Duplicate Check via DB:
  Duplicate file verification now relies exclusively on checking the database (and an in-memory cache loaded from it) rather than searching the disk. This significantly speeds up the process when re-downloading the same URL.
• Thread-Safe DB Access:
  Database operations are protected with a thread lock to ensure safe concurrent access.
• Clear Database Functionality:
  A new method (clear_database) has been added to allow clearing all download records from the database.

Settings Window Enhancements

• New Database Management Tab:
  A new "Database" tab has been added to the Settings Window where users can:
  • Export the Database: Copy the downloads.db file to a user-specified location.
  • Clear the Database: Delete all download records.
• Interface Text Translated to English:
  All labels, button texts, and messages in the settings interface have been translated into English for clarity.

Other Improvements

• Optimized Duplicate Verification:
  The duplicate file check in the download process has been streamlined to rely solely on the database (via an in-memory cache), eliminating time-consuming disk scans and remote HEAD requests.
• Enhanced Log Messaging:
  Log messages now clearly reflect the new database-based duplicate checking and other operations.
• General Code Refinements:
  Minor tweaks have been made throughout the code to improve performance and ensure consistency with the new features.