* seo: incident management guides and product page retitle The incident management product page sat at position ~23 for "slack incident management", a query Google treats as informational: the SERP is setup guides, not product pages. Add the guide that fits that SERP, a guide for "incident commander" (1.9k/mo, KD 1), and turn the dormant "what is incident management" guide into the hub that links into the product page. The product page itself now targets the commercial terms ("incident management platform/software") instead. * seo: match guide wording to incident behaviour Review pass: notes and pinned messages land on the timeline without an approval card, canceling closes the incident, the dashboard separates Approve from Approve & close, the commander stays editable until close, and reminders fall back to the declarer when there is no commander.