feat: settings page, sidebar and drawer destination "Settings" (icon settings, after Integration), route /settings (verified), showing only the running build's Version

internal/infrastructure/config/settings.go

@@ -31,6 +31,7 @@ type Settings struct {
 	Smtp               SmtpSettings
 	AuthRateLimit      AuthRateLimitSettings
 	TrustedProxies     []string
+	Version            string
 }
 
 func (s Settings) IsProduction() bool {