Add a per-row Test button to the external MCP servers list that shows the
connection result inline (no toasts). Extract the row into AiMcpServerRow so
each row owns its own useTestAiMcpServerMutation instance — independent loading
and result, no cross-row flicker.
States: idle (Test), pending (loading), success (green, "OK · N" with the tool
count), failure (red, "Failed"); a tooltip shows the tool list or the error.
The result resets when url/transport/headers change (the row is keyed by id, so
it does not remount). Backend, service and mutation are unchanged.
- ai-mcp-servers.tsx: AiMcpServerRow + Test button + reset effect + tooltip.
- i18n: add Failed / "OK · {{n}}" (en, ru) and ru Test / tool-list keys.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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