fix: revert hide ask ai button

[boojack]

🤖 Generated by Copilot at 0bc75a0

Summary

🔧🐛🌐

This pull request refactors the code to remove the OpenAI configuration from the system status and store it as a separate system setting. It also simplifies the UI and the global state, fixes a typo, and modifies a translation. The files affected are server/system.go, web/src/components/Header.tsx, web/src/components/Settings/SystemSection.tsx, web/src/store/module/global.ts, api/system.go, web/src/components/AskAIDialog.tsx, web/src/locales/zh-Hans.json, and web/src/store/reducer/global.ts.

We're hauling on the ropes, me hearties, on the count of three
We're cleaning up the code, me hearties, openAIConfig is free
We're making it more simple, me hearties, and more performant too
We're sailing with the wind, me hearties, Ask AI is our crew

Walkthrough

• Remove OpenAI configuration from system status and store it as a separate system setting (link, link, link, link, link)
• Refactor SystemSection component to use a separate state variable for OpenAI configuration and update the fetching, saving, and rendering logic accordingly (link, link, link, link, link, link, link, link)
• Simplify Header component to always show the header-ask-ai button and remove unused dependencies and variables (link, link, link, link)
• Fix a typo in the AskAIDialog component that caused a missing closing tag (link)
• Use a consistent and recognizable name for the Ask AI feature across languages by changing the Chinese translation to "Ask AI" (link)

[github-actions]

Uffizzi Ephemeral Environment deployment-22381

☁️ https://app.uffizzi.com/github.com/usememos/memos/pull/1539

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[boojack]

FYI @joaonunomota Because OpenAI API key should be a secret field, so we shouldn't pass it in system status. You can hide it with additional CSS. e.g.

#header-ask-ai{display: none !important;}

[github-actions]

Uffizzi Preview deployment-22381 was deleted.