docs: update backlog and CLAUDE.md for console and power control

- backlog: mark Console Link as done (merged to main)
- CLAUDE.md: remove ConsolePanel and /api/vnc from architecture
- CLAUDE.md: note console URL format and new-tab behavior
- CLAUDE.md: remove PROXMOX_CONSOLE_TOKEN env var

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backlog.md

@@ -3,8 +3,8 @@
 ## Quick Wins (low effort, high value)
 
 ### Console Link
-- Add a clickable name link per row linking to Proxmox web console: `/pve/console.html?node=X&vmid=Y`
-- **Status: done (pending push)**
+- Console button per row opens Proxmox web UI console in new tab. URL built from web UI endpoint with session cookies for auth.
+- **Status: done (merged to main)**
 
 ### Manual Refresh
 - Button in dashboard header that calls `mutate()` on all SWR caches