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/AgentTool/__tests__/prompt.test.ts

@@ -57,13 +57,4 @@ describe('prompt.ts fork-related text verification', () => {
       expect(bgCondition[0]).not.toContain('!forkEnabled')
     }
   })
-
-  test('fork example includes fork: true parameter', () => {
-    // The first fork example should have fork: true
-    const forkExampleBlock = promptSource.match(
-      /name: "ship-audit"[\s\S]*?Under 200 words/,
-    )
-    expect(forkExampleBlock).not.toBeNull()
-    expect(forkExampleBlock![0]).toContain('fork: true')
-  })
 })