fix(codex): separate multirouter catalog and subagent ordering

Fix the Codex MultiRouter setup flow so single-provider model mapping checkboxes mean catalog retention instead of spawn-agent selection. Removing a checkbox now removes that model row, and the row arrows move the provider catalog order directly.

Add explicit wizard pages for naming the new MultiRouter plan, curating the final merged model catalog, and selecting ordered spawn-agent candidates after the final model pool is known. The plan builder now accepts planName, catalogModelOrder, and spawnAgentModels while filtering routes and catalog consistently.

Record the new flow in memory.md. Verification: pnpm typecheck; pnpm vitest run tests/lib/codexMultiRouterWizard.test.ts tests/components/CodexMultiRouterWizard.test.tsx tests/components/CodexFormFields.test.tsx; pnpm exec prettier --check src/components/codex/CodexMultiRouterWizard.tsx src/components/providers/forms/CodexFormFields.tsx src/lib/codexMultiRouterWizard.ts tests/components/CodexMultiRouterWizard.test.tsx tests/components/CodexFormFields.test.tsx tests/lib/codexMultiRouterWizard.test.ts memory.md; git diff --check.

Author: BigStrongSun

memory.md

@@ -1,5 +1,11 @@
 # CC Switch Repository Memory
 
+## 2026-07-01 Codex MultiRouter Wizard Catalog Curation Flow
+
+- Codex 单 provider 表单 `CodexFormFields` 的模型映射表第一列语义是“保留这个模型进入该 provider 的 modelCatalog”，不是子 Agent 候选。取消勾选会删除该模型行；上下箭头移动的是 catalog 行顺序。不要再在单 provider 获取 `/models` 后自动写 `spawnAgentModels` 前 5 个。
+- MultiRouter 设置向导的正确顺序是：模型源 -> MultiRouter 命名 -> 配置检查 -> 获取/测试模型 -> 重名别名 -> 汇总模型排序/剔除 -> 路由预览 -> 子 Agent 候选排序 -> 保存发布。最终汇总页决定 `modelCatalog.models` 和 route `match.models` 保留哪些模型；子 Agent 页只从最终保留模型中选择最多 5 个并写入 `modelCatalog.spawnAgentModels`。
+- `buildCodexMultiRouterWizardPlan` 支持可选 `planName`、`catalogModelOrder`、`spawnAgentModels`。传入 `catalogModelOrder` 时必须同时过滤 routes 和 final catalog，避免 UI 剔除模型但路由仍命中；传入 `spawnAgentModels` 时要过滤掉已剔除模型并限制最多 5 个。
+
 ## 2026-07-01 Codex Provider Protocol Probe Concurrency
 
 - Codex provider 表单的“测试 Chat / Responses”可以并发，但不要改成无界并发：`src/components/providers/forms/CodexFormFields.tsx` 使用 `CODEX_PROTOCOL_PROBE_MODEL_CONCURRENCY = 3` 的模型级并发池，避免大模型目录串行太慢，也避免一次性打爆真实供应商限流。