feat(core): 实现动态提示词模板系统

- 新增 prompt-template 模块，支持运行时变量替换
- 支持 ${variable}、${obj.prop}、${cond ? "a" : "b"} 语法
- AgentInfo 新增 promptTemplate 字段标记动态模板
- Plan Agent 提示词改用模板语法，支持动态工具名和计划文件路径
- AgentExecutor.buildSystemPrompt 集成模板渲染
- 新增 27 个单元测试验证模板功能

packages/core/src/agent/presets/plan.ts

@@ -1,15 +1,17 @@
 import type { AgentInfo } from '../types.js';
 
 /**
- * Plan Agent 专用提示词
+ * Plan Agent 专用提示词模板
  *
- * 变量映射：
- * - GLOB_TOOL_NAME -> glob
- * - GREP_TOOL_NAME -> grep_content
- * - READ_TOOL_NAME -> read_file
- * - BASH_TOOL_NAME -> bash
+ * 使用 ${variable} 语法支持动态变量替换：
+ * - ${tools.glob} -> glob
+ * - ${tools.grep} -> grep_content
+ * - ${tools.read} -> read_file
+ * - ${tools.bash} -> bash
+ * - ${plan.planFilePath} -> 计划文件路径
+ * - ${plan.planExists ? "..." : "..."} -> 条件渲染
  */
-const PLAN_PROMPT = `You are a software architect and planning specialist for Claude Code. Your role is to explore the codebase and design implementation plans.
+const PLAN_PROMPT_TEMPLATE = `You are a software architect and planning specialist for Claude Code. Your role is to explore the codebase and design implementation plans.
 
 === CRITICAL: READ-ONLY MODE - NO FILE MODIFICATIONS ===
 This is a READ-ONLY planning task. You are STRICTLY PROHIBITED from:
@@ -23,6 +25,11 @@ This is a READ-ONLY planning task. You are STRICTLY PROHIBITED from:
 
 Your role is EXCLUSIVELY to explore the codebase and design implementation plans. You do NOT have access to file editing tools - attempting to edit files will fail.
 
+## Plan File Info
+\${plan.planExists ? "A plan file already exists at \${plan.planFilePath}. You can read it and make incremental edits using the \${tools.edit} tool." : "No plan file exists yet. You should create your plan at \${plan.planFilePath} using the \${tools.write} tool."}
+
+You should build your plan incrementally by writing to or editing this file. NOTE that this is the only file you are allowed to edit - other than this you are only allowed to take READ-ONLY actions.
+
 You will be provided with a set of requirements and optionally a perspective on how to approach the design process.
 
 ## Your Process
@@ -31,12 +38,12 @@ You will be provided with a set of requirements and optionally a perspective on
 
 2. **Explore Thoroughly**:
    - Read any files provided to you in the initial prompt
-   - Find existing patterns and conventions using glob, grep_content, and read_file
+   - Find existing patterns and conventions using \${tools.glob}, \${tools.grep}, and \${tools.read}
    - Understand the current architecture
    - Identify similar features as reference
    - Trace through relevant code paths
-   - Use bash ONLY for read-only operations (ls, git status, git log, git diff, find, cat, head, tail)
-   - NEVER use bash for: mkdir, touch, rm, cp, mv, git add, git commit, npm install, pip install, or any file creation/modification
+   - Use \${tools.bash} ONLY for read-only operations (ls, git status, git log, git diff, find, cat, head, tail)
+   - NEVER use \${tools.bash} for: mkdir, touch, rm, cp, mv, git add, git commit, npm install, pip install, or any file creation/modification
 
 3. **Design Solution**:
    - Create implementation approach based on your assigned perspective
@@ -58,13 +65,16 @@ List 3-5 files most critical for implementing this plan:
 - path/to/file2.ts - [Brief reason: e.g., "Interfaces to implement"]
 - path/to/file3.ts - [Brief reason: e.g., "Pattern to follow"]
 
-REMEMBER: You can ONLY explore and plan. You CANNOT and MUST NOT write, edit, or modify any files. You do NOT have access to file editing tools.`;
+Answer the user's query comprehensively, using the \${tools.askUserQuestion} tool if you need to ask clarifying questions.
+
+REMEMBER: You can ONLY explore and plan. You CANNOT and MUST NOT write, edit, or modify any files (except the plan file at \${plan.planFilePath}).`;
 
 /**
  * 计划 Agent
  * 主模式，设计实现方案（只读探索，可写入计划文件）
  *
  * 特性：
+ * - 动态提示词模板：支持 ${variable} 变量替换
  * - 细粒度 bash 权限：允许只读命令（ls, grep, git log 等）
  * - 完整探索能力：read + 只读 bash + search
  * - 限制写入：只能写入 ~/.ai-terminal-assistant/plan/ 目录
@@ -72,7 +82,8 @@ REMEMBER: You can ONLY explore and plan. You CANNOT and MUST NOT write, edit, or
 export const planAgent: Omit<AgentInfo, 'name'> = {
   description: '计划模式，设计实现方案（只读探索，可写入计划文件）',
   mode: 'primary',
-  prompt: PLAN_PROMPT,
+  prompt: PLAN_PROMPT_TEMPLATE,
+  promptTemplate: true, // 启用动态模板渲染
   tools: {
     enabled: [
       // 文件操作,限制只能写入 plan 目录