晴天 2f7cd6d429 perf(ui): speed up dashboard startup rendering ...

Render the dashboard first wave without waiting for get_version_info, which may spawn CLI work and query the registry. Version data now updates the stat cards asynchronously after the core service/config data is shown.

Also shorten the desktop Gateway port probe before WebSocket connection from 20s/2s polling to 3s/300ms polling, relying on the WebSocket reconnect path instead of blocking startup for a long time.

## Verification
- npm run build

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components

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engines

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lib

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locales

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pages

perf(ui): speed up dashboard startup rendering

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style

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main.js

perf(ui): speed up dashboard startup rendering

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router.js

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