Bulk-create test cases from any context

Writing test cases for a new feature used to mean opening a blank case for the first flow, then repeating that for the second, the third, the tenth. Not anymore.

• One request, many cases: ask Thunders AI to create several test cases at once, from a doc, a live page you've asked it to browse, or an attachment you drop in.
• Each one reviewable on its own: every test case comes back as its own result, so you approve or edit one without touching the rest.
• Grounded in what you gave it: the cases it writes trace back to the context you handed it, not a generic template.

If a feature ships with five user-facing flows, that's five test cases from one request, not five separate conversations.

#Sprint30