v0.22.0: First-run setup wizard, local infra backup, hub verification

New controller features:
- Web-based setup wizard replaces docker-setup.sh interactive config
  - Dual listener: :8080 (Traefik) + :8081 (direct HTTP for LAN)
  - Drive scanner finds .felhom-infra-backup/ on all block devices
  - Hub recovery pull (GET /api/v1/recovery/{id}) with retrieval password
  - Fresh install: Hub config download or manual wizard
  - CSRF protection, state persistence, Hungarian UI
- Local infra backup written to all connected drives after each backup cycle
  - .felhom-infra-backup/backup.json + metadata.json with SHA256 checksum
- Hub verification: parse customer_blocked from report push response
  - Limited mode after 7 days without verification
- Recovery info page on Settings + recovery-info.txt file generation
- Pending events queue: DR events sent to Hub on next report push
- docker-setup.sh v6.0.0: removed interactive wizard, minimal controller.yaml only

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

controller/internal/setup/network.go

@@ -0,0 +1,49 @@
+package setup
+
+import (
+	"net"
+	"sort"
+	"strings"
+)
+
+// DetectLocalIPs returns non-loopback, non-docker IPv4 addresses.
+func DetectLocalIPs() []string {
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return nil
+	}
+
+	var ips []string
+	for _, iface := range ifaces {
+		// Skip down, loopback, and Docker/container interfaces
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		name := strings.ToLower(iface.Name)
+		if strings.HasPrefix(name, "docker") || strings.HasPrefix(name, "br-") ||
+			strings.HasPrefix(name, "veth") || strings.HasPrefix(name, "lo") {
+			continue
+		}
+
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+		for _, addr := range addrs {
+			var ip net.IP
+			switch v := addr.(type) {
+			case *net.IPNet:
+				ip = v.IP
+			case *net.IPAddr:
+				ip = v.IP
+			}
+			if ip == nil || ip.IsLoopback() || ip.To4() == nil {
+				continue // skip non-IPv4
+			}
+			ips = append(ips, ip.String())
+		}
+	}
+
+	sort.Strings(ips)
+	return ips
+}