docs: update README, CLAUDE.md, backlog, and .env.example

- README: add all features, correct tech stack (axios/setInterval), add IP addresses section, fix API routes
- CLAUDE.md: fix architecture, remove SWR references, fix env var names, add IP address patterns
- backlog: remove ip6= mention, clean duplicate entries, mark done
- .env.example: remove unused PROXMOX_CONSOLE_TOKEN

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

backlog.md

@@ -28,15 +28,15 @@
 ## Quick Wins (low effort, high value)
 
 ### Per-VM/LXC IP Addresses
-- LXCs: parses `ip=` and `ip6=` from `net0`, `net1`, etc. fields in `/nodes/<node>/lxc/<id>/config`.
-- VMs: fetches from `/nodes/<node>/qemu/<id>/agent/network-get-interfaces` and reads `ipaddresses`.
-- Displays IPs below the name in the table.
+- LXCs: fetches from `/interfaces` endpoint; falls back to `ip=` parsing from `net0`-`net7` in `/config`.
+- VMs: fetches from `/agent/network-get-interfaces` (requires QEMU guest agent).
+- IPv4 only. Displays IPs below the name in the table.
 - **Status: done**
 
 ### Search / Filter
 - Client-side text input filtering table rows by name/node/status
 - Uses `useMemo` for performant filtering, auto-expands single node and filter-matched nodes
-- **Status: done (merged to main)**
+- **Status: done**
 
 ## Medium Effort
 
@@ -51,9 +51,6 @@
 - 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
-- Done — uses `/nodes/<node>/qemu/<id>/agent/network-get-interfaces` for VMs and config `net0`/`net1` parsing for LXCs.
-
 ### Per-VM CPU/Memory Trend
 - Periodic polling to build a small trend chart