fix(web): show live agent work progress and fail truncated rectification answers

Rectification dropped tool.activity started events and treated length finishes as completed. Share generation settings with consultation, keep the activity line through streaming, and name multi-domain chart calculation.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/app/api/rectification/agent/route.ts

@@ -290,6 +290,7 @@ export async function POST(request: Request) {
           emit: (event) => send(event),
           signal: request.signal,
           timeContext,
+          generationModel: selectedModel.model,
           buildAgent: (turnId, skillPackage, attemptId) => Promise.resolve(
             getRectificationV9Agent(selectedModel, {
               userId,