Fix MCP install: preserve server name and show paste-ready config

[dilpreetkaur-bluesky]

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Note

Low Risk
UI and plugin-ingestion metadata only; no auth, migrations, or API contract changes beyond correcting MCP install naming and displayed config shape.

Overview
Fixes repo-ingested MCP plugins installing under the generic name server and showing config that users cannot paste into ~/.cursor/mcp.json.

Ingestion (parse.ts): When unwrapping mcpServers, the server key is now stored in component metadata.name so the install flow can recover it after content is saved as the bare inner config.

Plugin detail (mcp-section.tsx): resolveMcpConfig takes a fallbackName (the component name) so install deeplinks use the real server name when metadata was missing—fixing existing listings without a re-scan. Preview and Copy now show the mcpServers-wrapped JSON (valid for manual mcp.json edits); deeplinks still pass the inner config only. Copy/help text clarifies that the block is paste-ready for ~/.cursor/mcp.json.

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