Capture Kit 0.4.1

Two fixes.

App shells no longer capture blank. Pages like the Google Cloud console, which pin their main area inside the window, came back as a header over an empty page. They now capture in full. If a page ever would still come out hidden, Capture Kit falls back to a normal screenshot and the report says so.

Page-fired captures now capture the page that asked. When an AI agent fired a capture from a page in a window you weren't using, Capture Kit photographed the tab you had in front of you instead. If you use the in-page trigger, update.

Install: download capture-kit-v0.4.1.zip, unzip it, then Load unpacked at chrome://extensions. Full notes in #21.