feat(config-meta): expose alias as a model-select field

Add an 'alias' section to DefaultSections() and an 'alias' field override
in DefaultRegistry() so the schema-driven React editor renders the new
top-level ModelConfig.Alias field as a model picker in its own section.

Assisted-by: Claude:opus-4.8 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

core/config/meta/registry.go

@@ -286,6 +286,15 @@ func DefaultRegistry() map[string]FieldMetaOverride {
 			Order:       45,
 		},
 
+		// --- Alias ---
+		"alias": {
+			Section:     "alias",
+			Label:       "Alias target",
+			Description: "Redirect all traffic for this model to another configured model. When set, every other field on this config is ignored and requests are served by the target model.",
+			Component:   "model-select",
+			Order:       0,
+		},
+
 		// --- Pipeline ---
 		"pipeline.llm": {
 			Section:              "pipeline",

core/config/meta/registry_test.go

@@ -0,0 +1,28 @@
+package meta_test
+
+import (
+	"github.com/mudler/LocalAI/core/config/meta"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("alias field metadata", func() {
+	It("registers the alias field as a model-select in the alias section", func() {
+		reg := meta.DefaultRegistry()
+		f, ok := reg["alias"]
+		Expect(ok).To(BeTrue(), "alias field should have a registry override")
+		Expect(f.Section).To(Equal("alias"))
+		Expect(f.Component).To(Equal("model-select"))
+	})
+
+	It("defines an alias section", func() {
+		var found bool
+		for _, s := range meta.DefaultSections() {
+			if s.ID == "alias" {
+				found = true
+			}
+		}
+		Expect(found).To(BeTrue(), "DefaultSections should include an alias section")
+	})
+})

core/config/meta/types.go

@@ -69,6 +69,7 @@ type FieldMetaOverride struct {
 func DefaultSections() []Section {
 	return []Section{
 		{ID: "general", Label: "General", Icon: "settings", Order: 0},
+		{ID: "alias", Label: "Alias", Icon: "git-merge", Order: 5},
 		{ID: "llm", Label: "LLM", Icon: "cpu", Order: 10},
 		{ID: "parameters", Label: "Parameters", Icon: "sliders", Order: 20},
 		{ID: "templates", Label: "Templates", Icon: "file-text", Order: 30},