docs: update TASKS.md with multi-node master dashboard

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

TASKS.md

@@ -47,6 +47,7 @@
 | [x] | Multi-scanner peer sync | Bidirectional sync between scanner instances |
 | [x] | Source scanner tracking | Synced devices positioned relative to source |
 | [x] | Peer scanner markers | Show peer scanners on 3D map |
+| [x] | Multi-node master dashboard | View peer node data without page redirect |
 | [ ] | Unit test coverage | pytest for core modules |
 | [ ] | Docker container | Containerized deployment |
 
@@ -104,6 +105,7 @@
 | Source scanner tracking | 2026-02-01 |
 | Peer scanner markers on 3D map | 2026-02-01 |
 | v1.0.0 release | 2026-02-01 |
+| Multi-node master dashboard | 2026-02-01 |
 
 ---
 
@@ -135,3 +137,9 @@
   - Positions calculated relative to detecting scanner (not local scanner)
   - Peer scanners shown on 3D map as cyan markers
   - Background sync every 30 seconds (configurable)
+- **Master Dashboard**: Designated master node can view any peer's data
+  - Set `is_master: true` in config.yaml to enable
+  - Node selector dropdown appears in header
+  - Switch between local/peer views without page redirect
+  - Live tracking runs on selected peer node
+  - WebSocket connects to peer for real-time updates

config.yaml

@@ -11,6 +11,7 @@ scanner:
   latitude: null
   longitude: null
   floor: null
+  is_master: true
   wifi_interface: wlan0
   bt_scan_timeout: 10
   path_loss_exponent: 2.5