Proxy UI MCP Auth passthrough

[wagnerjt]

Title

Implements the UI MCP auth passthrough defined in #11965

Relevant issues

Pre-Submission checklist

• My PR's scope is as isolated as possible, it only solves 1 specific problem

Type

🆕 New Feature

Changes

• Refactor one file out of mcp/index.tsx
• UI component to support the auth types: api key, bearer token, basic auth.
• Banner on MCP Tool call if auth is potentially needed
• Send the appropriate string value to the tool/call endpoint with the x-mcp-auth endpoint

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
litellm	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 22, 2025 10:01pm

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[ishaan-jaff]

LGTM