Merge ticket/023-dashboards-refresh-with-ui

Resolves a POLL_MS import conflict with ticket 025 in App.tsx.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o

webapp/src/App.tsx

@@ -20,8 +20,7 @@ import {
 } from './lib/api'
 import { DocsNavProvider } from './lib/docsNav'
 import { useSettingsPanel } from './lib/useSettingsPanel'
-
-const POLL_MS = 2000
+import { POLL_MS } from './lib/polling'
 
 // Height (px) the log viewer had before it became resizable — kept as the default so existing
 // layouts don't jump on first load after this change.