fix(ui): unbreak ColumnDetailPanel test suite on 1.12.6

[siddhant1]

Summary

• Remove the jest.mock('@mui/material/styles', ...) block from ColumnDetailPanel.test.tsx that made the entire suite fail to load on 1.12.6.
• The mock's styled implementation returned jest.fn().mockImplementation(...). Jest mock functions are non-extensible, so when @mui/x-tree-view/TreeItem (pulled in transitively via MUIAsyncTreeSelect -> MUIDomainSelect -> formUtils -> ... -> ColumnDetailPanel) assigned TreeItemCheckbox.displayName, it threw TypeError: Cannot add property displayName, object is not extensible.

Background

• The broken mock was introduced in feat(ui): implement column detail view #24268 (feat(ui): implement column detail view) and has always been latent.
• On main it was removed in Migrate EntitySummaryPanel and related components from MUI to untitledUI #26396 during the MUI → UntitledUI migration. That PR wasn't backported to 1.12.6, so this branch still carries the broken mock while also pulling in the x-tree-view chain via formUtils, which is what surfaces the error.
• This PR is the minimal targeted fix — just the 26-line mock block. No production-code changes.

Test plan

• yarn test --testPathPattern=ColumnDetailPanel.test.tsx → 16/16 pass locally
• eslint on the modified file → clean
• tsc --noEmit → no new errors
• CI SonarCloud + Jest Coverage workflow passes

🤖 Generated with Claude Code

[github-actions]

Hi there 👋 Thanks for your contribution!

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[gitar-bot]

Code Review ✅ Approved

Restores the ColumnDetailPanel test suite compatibility for version 1.12.6. No issues found.

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[github-actions]

❌ UI Checkstyle Failed

❌ ESLint + Prettier + Organise Imports (src)

One or more source files have linting or formatting issues.

❌ Core Components — ESLint + Prettier

One or more core-component files have linting or formatting issues.

---

Fix locally (fast — only checks files changed in this branch):

make ui-checkstyle-changed

[github-actions]

Jest test Coverage

UI tests summary

Lines	Statements	Branches	Functions
	66% (57588/87246)	45.69% (30524/66796)	48.47% (9145/18865)

[sonarqubecloud]

Quality Gate passed for 'open-metadata-ui'

Issues
692 New issues
0 Accepted issues

Measures
15 Security Hotspots
0.0% Coverage on New Code
4.1% Duplication on New Code

See analysis details on SonarQube Cloud