refactor backend API structure

internal/httpapi/admin/settings/handler_settings_runtime.go

@@ -0,0 +1,44 @@
+package settings
+
+import "ds2api/internal/config"
+
+func validateMergedRuntimeSettings(current config.RuntimeConfig, incoming *config.RuntimeConfig) error {
+	merged := current
+	if incoming != nil {
+		if incoming.AccountMaxInflight > 0 {
+			merged.AccountMaxInflight = incoming.AccountMaxInflight
+		}
+		if incoming.AccountMaxQueue > 0 {
+			merged.AccountMaxQueue = incoming.AccountMaxQueue
+		}
+		if incoming.GlobalMaxInflight > 0 {
+			merged.GlobalMaxInflight = incoming.GlobalMaxInflight
+		}
+		if incoming.TokenRefreshIntervalHours > 0 {
+			merged.TokenRefreshIntervalHours = incoming.TokenRefreshIntervalHours
+		}
+	}
+	return validateRuntimeSettings(merged)
+}
+
+func (h *Handler) applyRuntimeSettings() {
+	if h == nil || h.Store == nil || h.Pool == nil {
+		return
+	}
+	accountCount := len(h.Store.Accounts())
+	maxPer := h.Store.RuntimeAccountMaxInflight()
+	recommended := defaultRuntimeRecommended(accountCount, maxPer)
+	maxQueue := h.Store.RuntimeAccountMaxQueue(recommended)
+	global := h.Store.RuntimeGlobalMaxInflight(recommended)
+	h.Pool.ApplyRuntimeLimits(maxPer, maxQueue, global)
+}
+
+func defaultRuntimeRecommended(accountCount, maxPer int) int {
+	if maxPer <= 0 {
+		maxPer = 1
+	}
+	if accountCount <= 0 {
+		return maxPer
+	}
+	return accountCount * maxPer
+}