a2fa941ce3
## What
`SettingsAiMCP` is dead code — nothing imports or renders it. The
redesign moved MCP setup to the **APIs & Webhooks** page
(`SettingsMcpSetup`, on the MCP tab), and the AI settings page now
**deep-links** there (`ApiWebhooks#mcp`) instead of rendering this
component.
Removes the orphaned component and its two cover SVGs:
- `src/pages/settings/ai/components/SettingsAiMCP.tsx`
- `public/images/ai/ai-mcp-cover-{light,dark}.svg`
## Notes
- Verified nothing references the component or the SVGs in source (only
stale `.po` source-reference comments remain, which `lingui` extraction
reconciles separately — not hand-edited here).
- The hero on the APIs & Webhooks page (incl. its MCP tab) is
unaffected; that's the `playground/cover` image.