fix: Move labelMap inside PluginCard component (#13020)

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### What this PR does

Before this PR:
The `labelMap` object was defined outside the `PluginCard` component
using the global `t` instance from i18next. This meant the translations
were captured once at module load time and never updated when the user
switched languages.

After this PR:
The `labelMap` is now defined inside the `PluginCard` component, using
the `t` function from the `useTranslation` hook. This ensures that when
the language changes, the component re-renders and the translations are
updated correctly.

### Why we need it and why it was done in this way

The following tradeoffs were made:
- Moving `labelMap` inside the component is a minimal change that fixes
the issue without requiring additional state management or context
providers.

The following alternatives were considered: None

See:
https://github.com/CherryHQ/cherry-studio/issues/13014#issuecomment-3951007403
(screenshot showing the issue)

### Breaking changes

None.

### Special notes for your reviewer

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user-guide update if it's a user facing feature.

### Release note

```release-note
fix: Update i18n text in PluginCard when language is switched
```

src/renderer/src/pages/settings/AgentSettings/components/PluginsSettings/components/PluginCard.tsx

@@ -1,6 +1,5 @@
 import type { PluginMetadata } from '@renderer/types/plugin'
 import { Button, Card, Spin, Tag } from 'antd'
-import { t } from 'i18next'
 import { Download, Star, Trash2 } from 'lucide-react'
 import type { FC } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -18,12 +17,6 @@ export interface PluginCardProps {
   onClick: () => void
 }
 
-const labelMap = {
-  skill: t('plugins.skills'),
-  agent: t('plugins.agents'),
-  command: t('plugins.commands')
-}
-
 export const PluginCard: FC<PluginCardProps> = ({
   plugin,
   stats,
@@ -48,6 +41,12 @@ export const PluginCard: FC<PluginCardProps> = ({
     return 'default'
   }
 
+  const labelMap = {
+    skill: t('plugins.skills'),
+    agent: t('plugins.agents'),
+    command: t('plugins.commands')
+  }
+
   const getTypeLabel = () => {
     if (isMarketplacePlugin) return t('agent.settings.plugins.tab')
     return labelMap[plugin.type]