UI/API changes

• NEW: Well-known targets picker on the probe detail results view — customise, share, and save your selection
• NEW: Well-known targets prefs (saved across sessions)
• NEW: Probe Connectivity "All Probes" view, and "Separate by controller" breakdown
• CHANGE: News and health-warning banners now show site-wide and stay dismissed
• FIX: Sometime blank page on failed route/chunk loads
• FIX: List formatting to fit pages
• FIX: Table scroll arrows no longer go missing in narrow layouts
• FIX: Resolved outstanding dependency security vulnerabilities
• FIX: Prefs race condition with notifications data
• FIX: Dashboard API card timestamps respect your UTC/Local preference