SubscriptionPanel: 2 skipped test suites (action buttons, loading states)

## Recommendation

### 🔧 FINISH: Enable and complete the skipped SubscriptionPanel tests

Two test suites for the cloud subscription panel are completely skipped.

## What Was Found

- `src/platform/cloud/subscription/components/SubscriptionPanel.test.ts:285` — `describe.skip('action buttons')`
- `src/platform/cloud/subscription/components/SubscriptionPanel.test.ts:309` — `describe.skip('loading states')`

## Context

Action button behavior and loading state rendering for the subscription panel remain untested. These skipped tests may indicate incomplete implementation or test debt.

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**Category:** Half-Implemented | **Confidence:** MEDIUM | **Tools:** Semantic analysis
_Filed by audit-code skill_

Part of #11022

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-11052-SubscriptionPanel-2-skipped-test-suites-action-buttons-loading-states-33e6d73d3650814e9b0fda642c785e38) by [Unito](https://www.unito.io)