AI Chat pauses long questions instead of giving up

Some questions need many lookups, such as comparing every phase across several routes and the people assigned to each. When AI Chat reaches its working limit on a question like that, it no longer fails with a request to try a narrower question. It stops, writes a short note of what it found so far and what it has not checked yet, and shows a Continue button that picks the work up from that note.

Questions like that also finish sooner. Route reads now name the people assigned to each stage, AI Chat runs several lookups at once, and a follow-up question remembers what the previous answer looked up.

When a lookup fails, the chat now shows the error's own message instead of technical details.