refactor: 精简系统提示词 — 合并沟通风格段落、精简 memory/工具描述、截断 gitStatus

- 合并 getOutputEfficiencySection + getSimpleToneAndStyleSection 为精简的 Communication style
- 精简 auto memory 指令：删除 4 种类型的详细说明和示例，仅保留核心 description
- 精简 Agent 工具：删除 forkExamples 和 currentExamples 大段示例
- 精简 Bash 工具：合并 sleep 相关指导
- 精简 EnterPlanMode/ExitPlanMode：删除详细 GOOD/BAD 示例
- gitStatus MAX_STATUS_CHARS 从 2000 降到 1000
- 同步更新 prompt engineering audit 测试断言

Co-Authored-By: glm-5-turbo <zai-org@claude-code-best.win>

packages/builtin-tools/src/tools/ExitPlanModeTool/prompt.ts

@@ -20,10 +20,4 @@ Ensure your plan is complete and unambiguous:
 - Once your plan is finalized, use THIS tool to request approval
 
 **Important:** Do NOT use ${ASK_USER_QUESTION_TOOL_NAME} to ask "Is this plan okay?" or "Should I proceed?" - that's exactly what THIS tool does. ExitPlanMode inherently requests user approval of your plan.
-
-## Examples
-
-1. Initial task: "Search for and understand the implementation of vim mode in the codebase" - Do not use the exit plan mode tool because you are not planning the implementation steps of a task.
-2. Initial task: "Help me implement yank mode for vim" - Use the exit plan mode tool after you have finished planning the implementation steps of the task.
-3. Initial task: "Add a new feature to handle user authentication" - If unsure about auth method (OAuth, JWT, etc.), use ${ASK_USER_QUESTION_TOOL_NAME} first, then use exit plan mode tool after clarifying the approach.
 `