7f702133cc
- Fix stale EventSource accumulation: onerror handler now closes the existing EventSource before creating a new one, preventing multiple live instances from stacking up and flooding /api/nodes on reconnect. - Add in-flight guard on /api/nodes fetch so concurrent requests are dropped if one is already in progress. - Add dominant reason code column to Alerts tab (Most Impersonated Networks and Most Targeted Devices tables) and Sessions tab rows. - README: document node dropout root cause (AP overwhelm on staggered power cycle), overnight stability confirmation, and dedicated AP todo. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>