fix(lifecycle): surface idle review failures

[Grivn]

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Before opening a PR, read the Contributing Guide, 贡献指南, and the Development and Verification Guide / 开发和验证指南.
PR 标题和提交信息必须使用 Conventional Commits（type(scope): subject），且不得包含 emoji。 / PR titles and commits must use Conventional Commits (type(scope): subject) and must not contain emoji.
本仓库接受 Bug 修复、兼容性适配、现有能力增强、性能或体验优化和维护类 PR。全新能力、Provider、持久化格式或安全边界变更必须先提 Issue 并获得维护者确认。 / This repository accepts bug fixes, compatibility work, improvements to existing capabilities, performance or UX optimization, and maintenance. New capabilities, Providers, persistence formats, or security-boundary changes require prior maintainer approval in an Issue.
外部贡献者的仅文档类 PR 不直接接受；请先提 Issue 讨论。维护者的发布说明与文档维护不受此限制。 / Documentation-only PRs from external contributors are not accepted directly; open an Issue first. Maintainer release notes and documentation maintenance are exempt.

摘要 / Summary

Failed idle reviews now appear in the Memory System workspace and Host log. The warning survives ordinary conversation turns until a successful review or session reset, and context-window errors explain how to choose a compatible task model.

关联 Issue 或背景 / Related Issue or Context

Fixes #210

涉及区域 / Affected Areas

• Host 激活、Headless 或 bundle / Host activation, Headless, or bundle
• 运行时记忆 / Runtime Memory
• 项目档案 / Project Documents
• 记忆空间或 Provider / Memory Spaces or Providers
• 子 Agent 或 Agent 工作流 / Subagent or Agent workflow
• Web UI 或对话交互 / Web UI or conversation interaction
• 设置、存储或安全 / Settings, storage, or security
• CLI、RPC、命令或工具 / CLI, RPC, commands, or tools
• 安装、更新或发布 / Installation, update, or release
• 测试、构建或文档 / Tests, build, or documentation
• 其他（请说明）/ Other (explain below)

PR 类型 / PR Type

• 面向用户的功能或行为变更 / User-facing feature or behavior change
• Bug 修复 / Bug fix
• 增强或优化 / Enhancement or optimization
• 兼容性适配 / Compatibility change
• 维护或重构 / Maintenance or refactor
• 测试或构建 / Tests or build

最新代码确认 / Latest Codebase Confirmation

• 我已基于最新 main 分支开发，或在提交前已 rebase 或合并最新 main。 / I developed from the latest main, or rebased or merged the latest main before submitting.

同步命令 / Sync command:

git fetch origin main; based on 1e19caf (latest origin/main).

AI 编码披露 / AI Coding Disclosure

• 完全 AI 编码：全部编程改动由 AI 产出，并由贡献者接受和审查。 / Fully AI-coded: AI produced all programming changes, which the contributor accepted and reviewed.
• 部分 AI 辅助：AI 帮助编写或修改了部分内容。 / Partially AI-assisted: AI helped write or modify part of the change.
• 未使用 AI 编码辅助。 / No AI coding assistance was used.

使用的 AI 模型 / AI model used:

GPT-6 Astra, max reasoning.

使用的编码 Agent 工具 / Coding Agent tool used:

Codex desktop with an isolated issue worktree.

仓库规范检查 / Repository Rules

• 未修改 DSH 官方源码，未让 tsconfig 指向 DSH 源码 checkout，仅使用正式的 @deepseek-ai/* NPM 契约。 / I did not modify DSH source or point tsconfig at a DSH source checkout, and used only published @deepseek-ai/* NPM contracts.
• Client 与 Host 边界仍以浏览器安全的 src/host/protocol.ts 为准，没有在两侧重复定义 wire DTO。 / The Client and Host boundary still uses browser-safe src/host/protocol.ts as the source for wire DTOs.
• 持久化格式、RPC 权限、路径或凭据处理的变更包含兼容或拒绝路径、安全分析和相应测试。 / Changes to persistence formats, RPC authority, paths, or credentials include compatibility or rejection paths, security analysis, and tests.
• 没有提交 token、密钥、私有记忆、未脱敏日志或生成的 lib/ 文件。 / I did not commit tokens, credentials, private memory, unredacted logs, or generated lib/ files.
• 用户可见文案和长期文档已同步维护中文与英文版本，命令、配置键和路径保持一致。 / User-facing copy and long-lived documentation are synchronized in Chinese and English, with matching commands, configuration keys, and paths.
• 会改变发布制品或其元数据的 PR 已添加 changeset；仅测试、CI 或站点文档变更可不添加。 / A PR that changes a published artifact or its metadata includes a changeset; test-only, CI-only, and site-documentation-only changes may omit one.
• 新增和修改的代码、注释、文档、提交信息不含 emoji。 / New and modified code, comments, documentation, and commits contain no emoji.

兼容性与数据安全 / Compatibility and Data Safety

Uses the existing status DTO and published DSH contracts. Fork parent-context inheritance and candidate eligibility are preserved. Errors are bounded to 500 characters with existing-style API-key redaction; no transcripts are included. No persistence format, Provider authority, configuration key or stored-memory migration changes; rollback needs no data conversion. The warning is visible when workspace status loads or refreshes and does not wake the parent model.

本地验证 / Local Validation

执行的命令 / Commands run:

pnpm run verify

结果摘要 / Result summary:

Passed pnpm run verify (930 root tests, 5 expected skips), pnpm verify:plugins (16 independent repositories, 17 artifacts), the opt-in real Mnemon 0.2.7 create/write/recall/forget test, documentation validation and git diff --check. Regression tests failed before the change. Real WebUI fault injection ran with all three Strategy enhancements; an ordinary runtime write succeeded afterward. The controlled endpoint exercises the actual HTTP400/fork path without a paid API or a synthetic 145K-token payload. A composition follow-up verifies HTTP 200 for parent requests that advertise the stable result tool, while stable and legacy child completion personas receive HTTP 400.

用户可见变更证据 / Local Feature Evidence

证据 / Evidence:

Reproduction and bilingual evidence