Initial commit: Luminary AI Gateway

OpenAI-compatible AI gateway with Vue admin UI, multi-provider egress,
ingress key governance, monitoring, and security controls.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/handler/admin/providers_util.go

@@ -0,0 +1,51 @@
+package admin
+
+import (
+	"strings"
+)
+
+func (h *Handler) providerNameTaken(name string, excludeID uint) bool {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return false
+	}
+	for _, p := range h.cache.ListProviders() {
+		if p.ID != excludeID && p.Name == name {
+			return true
+		}
+	}
+	return false
+}
+
+func (h *Handler) modelAliasTaken(alias string, excludeModelID uint) bool {
+	alias = strings.TrimSpace(alias)
+	if alias == "" {
+		return false
+	}
+	for _, p := range h.cache.ListProviders() {
+		for _, m := range h.cache.GetModels(p.ID) {
+			if m.ID == excludeModelID {
+				continue
+			}
+			if m.Alias == alias {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func normalizeAlias(alias string) string {
+	return strings.TrimSpace(alias)
+}
+
+func validateModelAlias(h *Handler, alias string, excludeModelID uint) string {
+	alias = normalizeAlias(alias)
+	if alias == "" {
+		return ""
+	}
+	if h.modelAliasTaken(alias, excludeModelID) {
+		return "model alias already exists"
+	}
+	return ""
+}