Web search for sources, fixed and easier to pick

Searching the web to add sources to a notebook had stopped working. Every search came back with a "web search is temporarily rate-limited" message, no matter how long you waited.

That is fixed. Web search runs again, and the whole flow around it is better.

When you search the web for sources now, you get a preview of what came back: a short research summary plus the list of sites found. From there you pick exactly which results to import instead of taking all of them at once. Select all is one tap if you do want everything, and the summary tucks into a collapsible section so the list stays front and center.

The same flow runs whether you start from the search bar in the Sources panel or from the "Add sources" window, so there is just one way it works.

Two smaller fixes came along with it. Imported web results no longer fail to load after you pick them, and the research summary and snippets render as clean text instead of raw markdown symbols.