feat(agent-profiles): 编辑变体实际参数并正确保存 (B05)

[ChenM0M]

变体原先只能编辑名称，而且名称不变时参数修改不会写入。现在每个 OpenCode 变体都有思考参数、温度、禁用开关及完整 JSON 对象编辑器。保存会检测参数变化，并保留未编辑的嵌套字段；非法对象和表单预算会阻止提交。参数只写入原生配置，不扩展网关协议转换能力。

基于 #26。复用思考参数表单时加入独立控件 ID。

验证：TypeScript、前端同名修改/未知字段/删除/非法值检查、24 个实际命令模块 harness 测试通过；额外执行同名变体修改后的原生保存/重读回归通过。没有执行桌面 GUI 或 Windows 原生测试。

2026-09-23 repair verification

• Current head: dbb45d0c44d22309428d4bad31065feb8c2afff1.
• Three-platform Build and Test: passed (attempt 1).
• Integrated with the other Agent configuration changes in fix: integrate Agent configuration PRs and repair cross-platform validation #33, whose current candidate also passed three-platform CI.
• Native GUI / Windows host / WSL release acceptance remains separate and is not inferred from CI.
• Browser integration testing found an oversized model dialog. The viewport scrolling fix is included in this branch and was rechecked interactively.

[ChenM0M]

内容已随整合 PR #33 合入 main (e3cb573)。此 PR 为被取代的分支/栈式 PR，按用户指示关闭；分支保留，未删除。