v0.22.1: Fix setup wizard bugs (detection, CSRF panic, version display, IP)

- NeedsSetup: only check for empty customer.id (not "demo-felhom")
- renderError: pass *http.Request to ensureCSRFToken (was nil → panic)
- Welcome template: remove redundant "v" prefix from version display
- IP detection: read HOST_IP env var for Docker container awareness
- docker-setup.sh: inject HOST_IP into generated docker-compose.yml
- Add logging for Hub config download in setup wizard

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

controller/internal/setup/setup.go

@@ -12,8 +12,9 @@ import (
 )
 
 // NeedsSetup checks whether the controller should enter setup mode.
+// Setup is needed when no customer ID has been configured (empty string).
 func NeedsSetup(cfg *config.Config) bool {
-	return cfg.Customer.ID == "" || cfg.Customer.ID == "demo-felhom"
+	return cfg.Customer.ID == ""
 }
 
 // SetupState persists wizard progress to survive browser crashes.