feat(den): simplify MCP action cards

[reachjalil]

Summary

Follow-up to #2851 that keeps imported MCP recovery clear without making marketplace cards visually heavy when a plugin declares several MCP servers.

• group multiple unresolved MCP requirements behind one compact MCPs require action disclosure
• show a clean provider row with a small icon-led Connect action for each MCP after expansion
• keep a single unresolved MCP visible without adding an unnecessary disclosure step
• prevent plugin cards from stretching to match taller cards in the marketplace grid
• collapse the plugin-declared URL and recovery explanation behind a quiet per-connection Details disclosure
• preserve the existing admin/member actions and authentication recovery behavior from fix(den): recover imported MCP authentication setup #2851

Why

#2851 intentionally exposes the configuration provenance needed to recover imported MCP authentication. Showing every provider, URL, and explanation at once makes plugin cards grow quickly and becomes difficult to scan as the number of MCP requirements increases. This change uses progressive disclosure so the connection actions and operational details remain available without dominating the default view.

Scope

Den marketplace presentation only. This does not change MCP discovery, credentials, OAuth, connection ownership, readiness calculation, schemas, or runtime behavior.

UI proof

Multiple unresolved MCPs use one compact summary by default, and the marketplace grid no longer stretches the neighboring card.

Expanding the summary reveals a clean provider row and small icon-led Connect action for each MCP.

Validation

• pnpm --dir ee/apps/den-web exec bun test tests/marketplace-mcp-readiness.test.ts — 12 passed
• pnpm --dir ee/apps/den-web typecheck — passed
• git diff --check — passed

The default Den web test command was also attempted, but two unrelated observability tests could not resolve the freshly installed @openwork-ee/utils/observability build artifact. The focused MCP readiness suite above passed independently.

Manual review

• Marketplace plugin cards remain compact and do not stretch to match taller grid neighbors.
• Multiple unresolved MCPs are collapsed under MCPs require action by default.
• Expanding the MCP summary reveals one compact Connect action per provider.
• Details remains available independently for each requirement.

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Project	Deployment	Actions	Updated (UTC)
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