docs: update backlog.md with full current state

- Move power control and console link to Completed section
- Add notes about disk.total not being populated (Storage/Resource items)
- Clarify which items exist in code vs still pending

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

backlog.md

@@ -1,11 +1,21 @@
 # Feature Backlog — proxmox-monitor
 
-## Quick Wins (low effort, high value)
+## Completed
+
+### Power Control
+- Start/stop/restart buttons per row on VMs and LXCs.
+- Power action uses `/api2/extjs` endpoint with empty body `{}`.
+- Instant UI refresh via direct state sync + rAF flush for status messages.
+- **Status: done (merged to main)**
 
 ### Console Link
-- Console button per row opens Proxmox web UI console in new tab. URL built from web UI endpoint with session cookies for auth.
+- Console button per row opens Proxmox web UI console in new tab.
+- URL format: `/?console=lxc|qemu&vmid={id}&node={node}&resize=scale&xtermjs=1`
+- Browser session cookies handle Proxmox auth automatically in new tab.
 - **Status: done (merged to main)**
 
+## Quick Wins (low effort, high value)
+
 ### Manual Refresh
 - Button in dashboard header that calls `mutate()` on all SWR caches
 - ~5 lines of code
@@ -18,20 +28,24 @@
 
 ### Uptime Duration
 - Format uptime seconds to "3d 4h 12m" via `formatUptime()` helper
+- Note: node card already shows uptime as raw seconds
 
 ### Search / Filter
 - Client-side text input filtering table rows by name/node/status
+- Note: VMList and LXCList have `consoleUrl` type defs ready for filtering
 
 ## Medium Effort
 
 ### Storage Usage
 - Show disk usage per Proxmox storage backend (like node cards)
+- Note: `disk.total` is not populated in the API (always 0) — needs `pvesh` or extra API calls
 
 ### Status Change Alert
 - Toast/banner when a VM state changes between polls
 
 ### Resource Allocation
 - Show vCPU count, total disk size alongside usage stats
+- Note: disk.total is not populated by Proxmox API — only disk.used is available
 
 ### Per-VM IP Addresses
 - Fetch guest network IP addresses (extra API call needed)