feat: update platform plugin license filtering

[ZhangSetSail]

No description provided.

[Copilot]

Pull request overview

Updates the platform plugin list UI to distinguish free vs commercial plugins and gate commercial plugin installation behind a valid enterprise license.

Changes:

• Adds licenseValid state sourced from region/getEnterpriseLicense and uses it to gate commercial plugin installs.
• Replaces the hardcoded “商业” tag with a dynamic “商业/免费” label based on plugin level.
• Simplifies the empty plugin list state to a centered Ant Design <Empty /> display.

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[Copilot]

licenseValid is derived with !!res.bean.valid, which treats valid: undefined as invalid. Elsewhere (e.g. src/layouts/TeamLayout.js) the code treats licenses as valid unless valid === false. If the backend omits valid for valid licenses, this will incorrectly block commercial plugin installs. Consider aligning the check to res.bean.valid !== false (and keep the fallback behavior consistent across the app).

Suggested change

	licenseValid: !!res.bean.valid,
	licenseValid: res.bean.valid !== false,

[Copilot]

The empty-state UI now renders <Empty />, but defaultPluginList in state and the renderDefaultPluginCard method appear unused after this change. Consider removing the unused state/method (or reusing them) to avoid dead code and potential lint warnings.

Suggested change

	<div style={{ marginTop: '24px', minHeight: '300px', display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
	<Empty description="暂无可用插件" />
	</div>
	defaultPluginList && defaultPluginList.length > 0 ? (
	<div style={{ marginTop: '24px', minHeight: '300px' }}>
	{defaultPluginList.map(item => this.renderDefaultPluginCard(item))}
	</div>
	) : (
	<div style={{ marginTop: '24px', minHeight: '300px', display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
	<Empty description="暂无可用插件" />
	</div>
	)