Implements a full downloads manager with Electron main process handling, IPC APIs, and renderer integration. Adds a dedicated downloads page, a mini downloads popup in the navigation bar with progress ring, and controls for pausing, resuming, canceling, opening, and showing downloads. Updates styles and navigation to support the new downloads features.
Introduces hard reload and fresh reload buttons to the UI, allowing users to reload pages while ignoring cache or with a cache-busting parameter. Refactors session and browser data clearing logic to handle multiple sessions and resets history JSON files. Adds per-section clear buttons for site and search history in settings, improving user control over stored data.
Updated Electron window and session configuration to enhance Google OAuth sign-in compatibility, including user agent spoofing, session partitioning, and webview security settings. Added debugging for cookie changes and improved request headers for OAuth flows. Updated renderer code and index.html to use the new session partition and user agent. Added oauth-debug.md to document changes and troubleshooting steps.
andrew