Keep the Runtime icon and label clear after a conversation-specific selection. Preserve override details and the reset action inside the picker, with regression coverage and bilingual release notes.
Release note: 移除会话 Runtime 按钮图标与名称之间的圆点，保留菜单内的单独选择提示与恢复项目默认操作。
- Store runtime selection as { provider?, model? } layers and resolve them per
field (conversation -> project -> global); drop the legacy auto provider.
- Migrate stored selections (database v49) and clear deleted profile ids.
- Re-resolve selections in Main per request and at queue dispatch.
- Add ProjectRuntimeSelector and a two-column RuntimeModelPicker; manage
link opens model connections; restore per-runtime default model tabs.
- Stop duplicating trusted instructions and history across OpenCode,
Continue and DeepSeek Harness runtimes.
- Document the layered design, global provider removal plan and planned
purpose-specific models.
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