Hide Empty Category if nothing is inside of the category

[Philip-Carneiro]

Description

Add changes to hide categories:

• In Model Catalog
• In MCP Catalog

Before the changes:

• Non PF-mode

• PF-mode

After the changes:

• Non PF-mode

• PF-mode

How Has This Been Tested?

It was manually tested.
To test it manually, need to edit the file clients/ui/bff/internal/mocks/static_data_mock.go

Adding this as part of the return object of method func GetCatalogSourceMocks() []models.CatalogSource {

		{
			Id:      "empty-models-source",
			Name:    "Empty Models Source",
			Enabled: &enabled,
			Labels:  []string{"empty models category"},
			Status:  &availableStatus,
		},

Adding this as part of the return object of method func GetCatalogLabelListMock() models.CatalogLabelList {

		{
			Name:        func() *string { s := "empty models category"; return &s }(),
			DisplayName: func() *string { s := "Empty Models Category"; return &s }(),
			Description: func() *string {
				s := "This category has no models — used for testing empty category hiding."
				return &s
			}(),
		},

Adding this as part of the return object of method func GetMcpServerCatalogSourceMocks() []models.CatalogSource {

		{
			Id:      "empty-mcp-source",
			Name:    "Empty MCP Source",
			Enabled: &enabled,
			Status:  &availableStatus,
			Labels:  []string{"empty mcp category"},
		},

Adding this as part of the return object of method GetMcpServerCatalogLabelListMock() models.CatalogLabelList {

		{
			Name:        func() *string { s := "empty mcp category"; return &s }(),
			DisplayName: func() *string { s := "Empty MCP Category"; return &s }(),
			Description: func() *string {
				s := "This category has no servers — used for testing empty category hiding."
				return &s
			}(),
		},

Run it make build; make run; from bff directory.

• Without this PR change, navigate to the Model Catalog and MCP Catalog and the empty category will be present at the category toggle bar
• With the PR changes, these categories will not be present

Merge criteria:

• All the commits have been signed-off (To pass the DCO check)
• THIS PR MERGE IS BLOCKED TO MERGE UNTIL hide cat toogle in case only one cat is available #2599 IS MERGED(THIS PR CONTAINS THE CHANGES FROM PR hide cat toogle in case only one cat is available #2599)

• The commits have meaningful messages
• Automated tests are provided as part of the PR for major new functionalities; testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work.
• Code changes follow the kubeflow contribution guidelines.
• For first time contributors: Please reach out to the Reviewers to ensure all tests are being run, ensuring the label ok-to-test has been added to the PR.

If you have UI changes

• The developer has added tests or explained why testing cannot be added.
• Included any necessary screenshots or gifs if it was a UI change.
• Verify that UI/UX changes conform the UX guidelines for Kubeflow.

[YuliaKrimerman]

Couple of small things here

[manaswinidas]

/retest

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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