refactor: 品牌重命名 + maxTokens 支持 + 设置面板简化

- CodeGuard → Code Purifier / 净码特工（displayName、命令、配置标题）
- 新增 ai.maxTokens 配置项，所有 Provider 及 fixer 传入 maxTokens
- AI 引擎增强：repairJsonEscapes + JSON 解析 fallback + 详细错误信息
- 设置面板规则管理改为文件级（list/delete .yaml），addRule 改为 AI 从 Markdown 生成 YAML
- yaml-parser 简化：移除 config.yaml 的 enable/disable 过滤逻辑
- 审查报告面板：errorBanner 优先显示具体错误、lint 诊断显示 suggestion、移除 translatedDiagnostics 独立渲染
- merger 中 translatedDiagnostics 覆盖原始 lint 诊断 message/suggestion
- HTML linter 配置项、测试用例重写、typescript-eslint 移入 dependencies

src/ai/engine.ts

@@ -1,7 +1,7 @@
 import * as vscode from 'vscode';
 import type { AIProvider } from './providers/base';
 import { createProvider } from './factory';
-import { getAIProvider, getAIModel, getAIBaseUrl, getAITemperature, getAITimeout, getAIOutputLanguage, getApiKey } from '../config';
+import { getAIProvider, getAIModel, getAIBaseUrl, getAITemperature, getAITimeout, getAIMaxTokens, getAIOutputLanguage, getApiKey } from '../config';
 import type { LinterDiagnostic, CustomRule } from '../types';
 import type {
   AIEngineResult,
@@ -26,14 +26,54 @@ function addLineNumbers(code: string): string {
   return code.split('\n').map((line, i) => `${String(i + 1).padStart(4, ' ')}| ${line}`).join('\n');
 }
 
+function repairJsonEscapes(str: string): string {
+  let s = str.replace(/\\"\\n/g, '\\n').replace(/\\"/g, '"');
+  let inString = false;
+  let out = '';
+  for (let i = 0; i < s.length; i++) {
+    const ch = s[i];
+    if (ch === '\\') {
+      out += ch;
+      if (i + 1 < s.length) { out += s[++i]; }
+    } else if (ch === '"') {
+      if (!inString) {
+        inString = true;
+        out += ch;
+      } else {
+        let j = i + 1;
+        while (j < s.length && s[j] === ' ') { j++; }
+        if (j < s.length && ':,\]}'.includes(s[j])) {
+          inString = false;
+          out += ch;
+        } else {
+          out += '\\"';
+        }
+      }
+    } else {
+      out += ch;
+    }
+  }
+  return out;
+}
+
 function parseJsonResponse(raw: string): object {
   const trimmed = raw.trim();
   const start = trimmed.indexOf('{');
   const end = trimmed.lastIndexOf('}');
   if (start === -1 || end === -1) {
-    throw new Error('响应中未找到 JSON');
+    throw new Error(`响应中未找到 JSON。原始响应（前200字符）：${trimmed.slice(0, 200)}`);
+  }
+  let jsonStr = trimmed.substring(start, end + 1);
+  try {
+    return JSON.parse(jsonStr);
+  } catch {
+    jsonStr = repairJsonEscapes(jsonStr);
+    try {
+      return JSON.parse(jsonStr);
+    } catch {
+      throw new Error(`JSON 解析失败。原始响应（前200字符）：${jsonStr.slice(0, 200)}`);
+    }
   }
-  return JSON.parse(trimmed.substring(start, end + 1));
 }
 
 const CUSTOM_RULE_SYSTEM_PROMPT = `你是代码规则审查员，只评估以下自定义规则是否被违反。
@@ -48,7 +88,8 @@ const DEEP_REVIEW_SYSTEM_PROMPT = `你是资深代码审查专家，完成两个
 重点：安全漏洞、逻辑错误、性能问题、设计缺陷
 不要重复静态分析已报告的问题。
 
-仅输出 JSON，格式：
+仅输出 JSON，字符串中的双引号必须用 \" 转义。
+格式：
 {
   "translatedDiagnostics": [{ "originalRuleId": "原始ID", "translatedMessage": "翻译", "translatedSuggestion": "建议", "codeDiff": "可选" }],
   "findings": [{ "ruleId": "kebab-case", "severity": "error|warning|info", "category": "bug|performance|security|style|design", "title": "标题", "description": "描述", "suggestion": "建议", "codeDiff": "可选", "line": 行号 }]
@@ -91,6 +132,7 @@ export async function runAIReview(
   const options = {
     model: getAIModel(),
     temperature: getAITemperature(),
+    maxTokens: getAIMaxTokens(),
     timeoutMs: getAITimeout() * 1000,
   };
 
@@ -123,8 +165,8 @@ export async function runAIReview(
         ...r,
         ruleId: `custom:${r.ruleId}`,
       }));
-    } catch {
-      errors.push('自定义规则响应解析失败');
+    } catch (e) {
+      errors.push(`自定义规则响应解析失败: ${e instanceof Error ? e.message : String(e)}`);
     }
   } else {
     errors.push(`自定义规则请求失败: ${resultA.reason}`);
@@ -140,8 +182,8 @@ export async function runAIReview(
       };
       translatedDiagnostics = parsed.translatedDiagnostics ?? [];
       findings = parsed.findings ?? [];
-    } catch {
-      errors.push('AI 审查响应解析失败');
+    } catch (e) {
+      errors.push(`AI 审查响应解析失败: ${e instanceof Error ? e.message : String(e)}`);
     }
   } else {
     errors.push(`AI 审查请求失败: ${resultB.reason}`);