chore: replace or upgrade deprecated packages

[dennisvankekem]

Considerations

• I have tested the changes in both light and dark mode.
• I have considered the need for new unit tests.
• I have tested the changes on a cluster.
• I have included relevant documentation updates.
• I have an approved Figma design or have reflected my changes in Figma
• I have verified that the UI/UX is consistent in major browsers (e.g., Chrome, Firefox, Safari, Edge).
• I have tested the changes for responsiveness in different screen resolutions.
• I have tested expected error states and verified that the user is presented with informative error messages.
• I have tested the feature with unusual or extreme inputs (e.g., very long strings, empty states, clicking a button multiple times quickly).

[Copilot]

🟡 Changes recommended

Dependency compatibility and tooling configuration issues can break runtime validation, linting, and contributor workflows.

4 open findings

• Fix invalid no-unused-imports-ts ESLint rule reference · New
• Pin react-is to React 18.3.1 for MUI compatibility · New
• Remove or restore the broken Commitizen prepare-commit hook · New
• Raise Node engine requirement to Vite 8 minimum · New

What changed in this PR

Upgrades Material UI to v6 and Notistack to v3, adapting components, themes, accessibility, and tests.

Changes:

• Migrates Lab loading buttons to Material UI buttons.
• Updates snackbar styling and Session click handling.
• Adds theme, accessibility, and integration tests.

File	Description
src/​utils/​snack.tsx	Adapts snackbar APIs and selectors.
src/​utils/​snack.test.tsx	Tests snackbar integration.
src/​theme/​overrides/​overrides.test.tsx	Updates Select role assertion.
src/​theme/​overrides/​LoadingButton.ts	Removes obsolete Lab override.
src/​theme/​overrides/​index.ts	Removes LoadingButton registration.
src/​theme/​overrides/​Button.ts	Adds loading-icon alignment.
src/​providers/​Session.tsx	Migrates snackbar click props.
src/​pages/​workloads/​create-edit/​WorkloadsCreateEditPage.tsx	Migrates loading button import.
src/​pages/​teams/​create-edit/​TeamsCreateEditPage.tsx	Migrates loading button import.
src/​pages/​settings/​platform/​PlatformSettingsPage.tsx	Migrates loading button import.
src/​pages/​services/​create-edit/​ServicesCreateEditPage.tsx	Migrates loading button import.
src/​pages/​secrets/​team/​create-edit/​SecretCreateEditPage.tsx	Migrates loading button import.
src/​pages/​secrets/​platform/​create-edit/​PlatformSecretCreateEditPage.tsx	Migrates loading button import.
src/​pages/​network-policies/​create-edit/​NetworkPoliciesIngressCreateEditPage.tsx	Migrates loading button import.
src/​pages/​network-policies/​create-edit/​NetworkPoliciesEgressCreateEditPage.tsx	Migrates loading button import.
src/​pages/​code-repositories/​create-edit/​CodeRepositoriesCreateEditPage.tsx	Migrates loading button import.
src/​pages/​catalogs/​team-overview/​WorkloadCatalogsOverviewPage.tsx	Migrates loading button import.
src/​pages/​catalogs/​platform/​create-edit/​CatalogsCreateEditPage.tsx	Migrates loading button import.
src/​pages/​builds/​create-edit/​BuildsCreateEditPage.tsx	Migrates loading button import.
src/​components/​ThemeColorPresets.tsx	Rebuilds palette-dependent overrides.
src/​components/​ThemeColorPresets.test.tsx	Tests theme presets and modes.
src/​components/​SubmitButton.tsx	Migrates button implementation and props.
src/​components/​ObjWizardModal.tsx	Migrates loading button import.
src/​components/​modals/​ConfigureGitModal.tsx	Migrates loading button import.
src/​components/​Header.tsx	Labels header selectors accessibly.
src/​components/​Header.test.tsx	Tests selector labels and switching.
src/​components/​DeleteDialog.tsx	Migrates loading button import.
src/​components/​DeleteButton.tsx	Migrates loading button import.
src/​components/​Button/​alignment.test.tsx	Updates v6 style and loading tests.
package.json	Upgrades UI and development dependencies.
.eslintrc.yml	Updates TypeScript lint rules.

🧠 Review effort: Balanced

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[CasLubbers]

Tested on cluster. Console works ✅