feat: 添加个人规则功能

- 新增个人规则管理模块 (personalRulesManager.ts)
   - 支持创建、编辑、删除多条规则
   - 规则存储在用户目录 ~/.iccoder/rules/
   - 对话时自动将规则传递给后端
   - 添加后端对接文档和 webpack 优化指南

src/utils/personalRulesManager.ts

@@ -0,0 +1,147 @@
+/**
+ * 个人规则管理工具
+ * 功能：读写个人规则文件
+ * 依赖：vscode, fs, path
+ * 使用场景：保存和加载用户的个人规则
+ */
+
+import * as vscode from 'vscode';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+
+/**
+ * 获取规则目录路径
+ */
+function getRulesDir(): string {
+  return path.join(os.homedir(), '.iccoder', 'rules');
+}
+
+/**
+ * 确保规则目录存在
+ */
+function ensureRulesDir(): void {
+  const dir = getRulesDir();
+  if (!fs.existsSync(dir)) {
+    fs.mkdirSync(dir, { recursive: true });
+  }
+}
+
+/**
+ * 从文件内容中提取规则名称
+ */
+function extractRuleName(content: string): string {
+  const lines = content.split('\n');
+  const firstLine = lines[0]?.trim();
+  if (firstLine && firstLine.startsWith('# ')) {
+    return firstLine.substring(2).trim();
+  }
+  return content.substring(0, 30) + (content.length > 30 ? '...' : '');
+}
+
+/**
+ * 保存新规则
+ */
+export async function savePersonalRule(name: string, content: string, enabled: boolean): Promise<boolean> {
+  try {
+    ensureRulesDir();
+
+    const timestamp = Date.now();
+    const filename = `rule-${timestamp}.md`;
+    const filePath = path.join(getRulesDir(), filename);
+
+    const fileContent = `# ${name}\n\n${content}`;
+    fs.writeFileSync(filePath, fileContent, 'utf-8');
+
+    await vscode.workspace.getConfiguration('ic-coder').update('personalRulesEnabled', enabled, vscode.ConfigurationTarget.Global);
+
+    vscode.window.showInformationMessage('规则已保存');
+    return true;
+  } catch (error) {
+    vscode.window.showErrorMessage(`保存规则失败: ${error}`);
+    return false;
+  }
+}
+
+/**
+ * 更新规则
+ */
+export async function updatePersonalRule(filename: string, name: string, content: string, enabled: boolean): Promise<boolean> {
+  try {
+    const filePath = path.join(getRulesDir(), filename);
+    const fileContent = `# ${name}\n\n${content}`;
+    fs.writeFileSync(filePath, fileContent, 'utf-8');
+
+    await vscode.workspace.getConfiguration('ic-coder').update('personalRulesEnabled', enabled, vscode.ConfigurationTarget.Global);
+
+    vscode.window.showInformationMessage('规则已更新');
+    return true;
+  } catch (error) {
+    vscode.window.showErrorMessage(`更新规则失败: ${error}`);
+    return false;
+  }
+}
+
+/**
+ * 删除规则
+ */
+export async function deletePersonalRule(filename: string): Promise<boolean> {
+  try {
+    const filePath = path.join(getRulesDir(), filename);
+    if (fs.existsSync(filePath)) {
+      fs.unlinkSync(filePath);
+      vscode.window.showInformationMessage('规则已删除');
+      return true;
+    }
+    return false;
+  } catch (error) {
+    vscode.window.showErrorMessage(`删除规则失败: ${error}`);
+    return false;
+  }
+}
+
+/**
+ * 加载所有规则
+ */
+export function loadPersonalRules(): { rules: Array<{ filename: string; name: string; content: string }>; enabled: boolean } {
+  const enabled = vscode.workspace.getConfiguration('ic-coder').get<boolean>('personalRulesEnabled', true);
+  const dir = getRulesDir();
+
+  if (!fs.existsSync(dir)) {
+    return { rules: [], enabled };
+  }
+
+  try {
+    const files = fs.readdirSync(dir).filter(f => f.endsWith('.md'));
+    const rules = files.map(filename => {
+      const content = fs.readFileSync(path.join(dir, filename), 'utf-8');
+      const lines = content.split('\n');
+      let name = '';
+      let actualContent = content;
+
+      if (lines[0]?.trim().startsWith('# ')) {
+        name = lines[0].substring(2).trim();
+        actualContent = lines.slice(2).join('\n').trim();
+      } else {
+        name = extractRuleName(content);
+      }
+
+      return { filename, name, content: actualContent };
+    });
+    return { rules, enabled };
+  } catch (error) {
+    console.error('读取规则失败:', error);
+    return { rules: [], enabled };
+  }
+}
+
+/**
+ * 获取当前生效的所有规则内容
+ */
+export function getActiveRules(): string | null {
+  const { rules, enabled } = loadPersonalRules();
+  if (!enabled || rules.length === 0) {
+    return null;
+  }
+  return rules.map(r => r.content).join('\n\n');
+}