[Bug] Desktop provider "Connect" only stores API key — provider definition is not scaffolded, no in-UI editor

Provider "Connect" only stores API key; provider definition must be configured separately

桌面端 Provider「Connect」只存 API key，provider 定义需手动补全

Environment

• OpenCode Desktop v1.18.9
• Windows x64
• Provider example: SiliconFlow (China) / generic OpenAI-compatible

环境

• OpenCode Desktop v1.18.9
• Windows x64
• 示例 provider：SiliconFlow（中国）/ 通用 OpenAI 兼容

Steps to reproduce

1. Settings → Providers → click "Connect" on e.g. "SiliconFlow (China)"
2. Paste API key and confirm
3. UI shows "connected"

复现步骤

1. Settings → Providers → 点击例如 "SiliconFlow (China)" 的 "Connect"
2. 粘贴 API key 并确认
3. UI 显示「已连接」

Expected

• "Connect" also creates/scaffolds the corresponding provider entry in ~/.config/opencode/opencode.jsonc, so the provider becomes usable
• OR the UI provides an in-app editor to configure provider definition (npm package, base URL, model list)
• The provider can be edited or disabled without deleting credentials

期望

• 「Connect」应同时创建/生成对应的 provider 条目写入 ~/.config/opencode/opencode.jsonc，使该 provider 可用
• 或提供 UI 内编辑器来配置 provider 定义（npm 包、base URL、模型列表）
• provider 应可编辑或禁用，而非删除凭证

Actual

• Only the API key is written to ~/.local/share/opencode/auth.json, e.g.
  { "siliconflow-cn": { "key": "...", "type": "..." } }
• No provider entry is added to ~/.config/opencode/opencode.jsonc by the "Connect" flow
• The UI exposes only a "Disconnect" button, which deletes the credential from auth.json — there is no edit or disable toggle
• To make the provider actually work, the user must manually edit opencode.jsonc and add the provider block

实际

• 「Connect」仅把 API key 写入 ~/.local/share/opencode/auth.json，例如
  { "siliconflow-cn": { "key": "...", "type": "..." } }
• 「Connect」流程不会向 ~/.config/opencode/opencode.jsonc 添加任何 provider 条目
• UI 只暴露一个「Disconnect（断开）」按钮，其作用是从 auth.json 删除凭证——没有编辑或禁用的开关
• 要让 provider 真正可用，用户必须手动编辑 opencode.jsonc 并补全 provider 块

Impact

• A desktop app that requires hand-editing JSON to finish provider setup is effectively broken for ordinary users; the "Connect" flow is misleading.

影响

• 一个需要手改 JSON 才能完成 provider 配置的桌面应用，对普通用户而言形同残缺；「Connect」流程具有误导性。

Workaround

• Manually add the provider block to opencode.jsonc (id must match the auth.json credential key to reuse the stored key).

临时规避

• 手动向 opencode.jsonc 添加 provider 块（id 必须与 auth.json 凭证键一致，才能复用已存的 key）。

Suggested fix

• Have "Connect" also scaffold the provider definition, OR provide a real in-UI editor for providers.

建议修复

• 让「Connect」同时生成 provider 定义，或提供真正的 UI 内 provider 编辑器。