feat(gallery): Add 'Get Config' button for models (#6154)

* feat(gallery): Add 'Get Config' button for models

This commit introduces a 'Get Config' button to the model gallery UI. This allows users to download and save the configuration file for a model without installing the model's weights.

Key changes:
- Added a getConfigButton element and integrated it into the gallery card.
- Created a new API endpoint /browse/config/model/:id to handle fetching and saving the model configuration.
- Refactored the InstallModel function to allow saving only the configuration file without downloading model weights.
- Added a ToYAML method on ModelConfig for serialization.
- Fixed button spacing in the gallery UI.

Signed-off-by: Matt Cowger <matt.cowger@sigmacomputing.com>

* Update for reviewer comments

Signed-off-by: Matt Cowger <matt.cowger@sigmacomputing.com>

---------

Signed-off-by: Matt Cowger <matt.cowger@sigmacomputing.com>

core/http/elements/buttons.go

@@ -70,6 +70,24 @@ func infoButton(m *gallery.GalleryModel) elem.Node {
 	)
 }
 
+func getConfigButton(galleryName string) elem.Node {
+	return elem.Button(
+		attrs.Props{
+			"data-twe-ripple-init":  "",
+			"data-twe-ripple-color": "light",
+			"class":                 "float-right ml-2 inline-flex items-center rounded-lg bg-gray-700 hover:bg-gray-600 px-4 py-2 text-sm font-medium text-white transition duration-300 ease-in-out",
+			"hx-swap":               "outerHTML",
+			"hx-post":               "browse/config/model/" + galleryName,
+		},
+		elem.I(
+			attrs.Props{
+				"class": "fa-solid fa-download pr-2",
+			},
+		),
+		elem.Text("Get Config"),
+	)
+}
+
 func deleteButton(galleryID string) elem.Node {
 	return elem.Button(
 		attrs.Props{

core/http/elements/gallery.go

@@ -339,7 +339,12 @@ func modelActionItems(m *gallery.GalleryModel, processTracker ProcessTracker, ga
 							reInstallButton(m.ID()),
 							deleteButton(m.ID()),
 						)),
-						installButton(m.ID()),
+						// otherwise, show the install button, and the get config button
+						elem.Node(elem.Div(
+							attrs.Props{},
+							getConfigButton(m.ID()),
+							installButton(m.ID()),
+						)),
 					),
 				),
 			),

core/http/routes/ui_gallery.go

@@ -189,6 +189,34 @@ func registerGalleryRoutes(app *fiber.App, cl *config.ModelConfigLoader, appConf
 		return c.SendString(elements.StartModelProgressBar(uid, "0", "Installation"))
 	})
 
+	app.Post("/browse/config/model/:id", func(c *fiber.Ctx) error {
+		galleryID := strings.Clone(c.Params("id")) // note: strings.Clone is required for multiple requests!
+		log.Debug().Msgf("UI job submitted to get config for : %+v\n", galleryID)
+
+		models, err := gallery.AvailableGalleryModels(appConfig.Galleries, appConfig.SystemState)
+		if err != nil {
+			return err
+		}
+
+		model := gallery.FindGalleryElement(models, galleryID)
+		if model == nil {
+			return fmt.Errorf("model not found")
+		}
+
+		config, err := gallery.GetGalleryConfigFromURL[gallery.ModelConfig](model.URL, appConfig.SystemState.Model.ModelsPath)
+		if err != nil {
+			return err
+		}
+
+		// Save the config file
+		_, err = gallery.InstallModel(appConfig.SystemState, model.Name, &config, model.Overrides, nil, false)
+		if err != nil {
+			return err
+		}
+
+		return c.SendString("Configuration file saved.")
+	})
+
 	// This route is used when the "Install" button is pressed, we submit here a new job to the gallery service
 	// https://htmx.org/examples/progress-bar/
 	app.Post("/browse/delete/model/:id", func(c *fiber.Ctx) error {