WiFi troubleshooting guide, fix empty security overrides, update config docs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -68,6 +68,7 @@ infrastructure/
     ├── 08-DNS-ARCHITECTURE.md        # DNS failover architecture
     ├── 09-TAILSCALE-VPN.md           # Tailscale VPN setup
     ├── 10-FAILOVER-NOBARA.md        # VRRP failover to Nobara
+    ├── 12-WIFI-TROUBLESHOOTING.md   # WiFi/CAPsMAN troubleshooting guide
     ├── CHANGELOG.md                  # Change history
     ├── archive/                      # Completed/legacy docs
     │   └── vlan-migration/           # VLAN migration project artifacts