v4.9 - flow, logging, and minimum feedback

🐛 Fixed

• Prevents the “site-only + cache-only” silent no-op by migrating legacy settings.
• Adds trigger logs (icon/context menu) when debug mode is enabled.
• Ensures minimum feedback with a warning badge when an action can’t run.
• Filters unsupported data types via browsingData.settings() before clearing.
• Avoids reload errors on special pages.

🔄 Changed

• Version bump to 4.9.