feat: 实现深度模式质检员功能

- 新增质检阶段 (inspect)：生成初稿后根据专家指令逐条检查
- AI 输出 JSON 格式质检报告，包含每项检查的 pass/warning/fail 状态
- MainContent.vue：新增质检报告卡片，可折叠展示检查结果
- 质检报告显示整体评价（通过/需关注/未通过）和详细评语
- 生成阶段指示器新增 inspect 状态（琥珀色）

src/components/MainContent.vue

@@ -70,11 +70,64 @@
               </div>
             </div>
 
+            <!-- 质检报告卡片（深度模式 + 范式预设时显示） -->
+            <div v-if="qualityReport" class="bg-slate-800/50 rounded-lg border border-slate-600 overflow-hidden">
+              <div class="px-4 py-3 border-b border-slate-700 flex items-center justify-between">
+                <div class="flex items-center gap-2">
+                  <span class="text-lg">🔍</span>
+                  <span class="text-sm font-medium text-slate-200">质检报告</span>
+                  <span 
+                    class="text-xs px-2 py-0.5 rounded"
+                    :class="{
+                      'bg-green-500/20 text-green-400': qualityReport.overall === 'pass',
+                      'bg-yellow-500/20 text-yellow-400': qualityReport.overall === 'warning',
+                      'bg-red-500/20 text-red-400': qualityReport.overall === 'fail'
+                    }"
+                  >
+                    {{ qualityReport.overall === 'pass' ? '通过' : qualityReport.overall === 'warning' ? '需关注' : '未通过' }}
+                  </span>
+                </div>
+                <button 
+                  @click="isQualityReportExpanded = !isQualityReportExpanded"
+                  class="text-slate-400 hover:text-white transition"
+                >
+                  <span class="transition-transform inline-block" :class="{ 'rotate-180': isQualityReportExpanded }">▼</span>
+                </button>
+              </div>
+              
+              <div v-show="isQualityReportExpanded" class="p-4 space-y-3">
+                <div 
+                  v-for="check in qualityReport.checks" 
+                  :key="check.key"
+                  class="flex items-start gap-3 text-sm"
+                >
+                  <span class="shrink-0 mt-0.5">
+                    <span v-if="check.status === 'pass'" class="text-green-400">✅</span>
+                    <span v-else-if="check.status === 'warning'" class="text-yellow-400">⚠️</span>
+                    <span v-else class="text-red-400">❌</span>
+                  </span>
+                  <div>
+                    <span class="font-medium" :class="{
+                      'text-green-300': check.status === 'pass',
+                      'text-yellow-300': check.status === 'warning',
+                      'text-red-300': check.status === 'fail'
+                    }">{{ check.title }}</span>
+                    <p class="text-xs text-slate-500 mt-0.5">{{ check.message }}</p>
+                  </div>
+                </div>
+                
+                <div v-if="qualityReport.summary" class="pt-3 border-t border-slate-700">
+                  <p class="text-xs text-slate-400 italic">📝 {{ qualityReport.summary }}</p>
+                </div>
+              </div>
+            </div>
+
             <!-- 生成阶段指示器 -->
             <div v-if="isGenerating && generationStage" class="flex items-center gap-2 text-xs text-slate-500">
               <span class="w-2 h-2 rounded-full animate-pulse" :class="{
                 'bg-indigo-500': generationStage === 'thinking',
                 'bg-blue-500': generationStage === 'draft',
+                'bg-amber-500': generationStage === 'inspect',
                 'bg-yellow-500': generationStage === 'critique',
                 'bg-green-500': generationStage === 'refine'
               }"></span>
@@ -178,6 +231,7 @@ const {
   generatedContent,
   thinkingContent,
   generationStage,
+  qualityReport,
   isGenerating,
   analysisResult,
   inputTask,
@@ -189,6 +243,7 @@ const {
 // AI 思考过程折叠状态
 import { ref } from 'vue'
 const isThinkingExpanded = ref(false)
+const isQualityReportExpanded = ref(true) // 质检报告默认展开
 
 // 范式定义
 const paradigms = [
@@ -272,6 +327,7 @@ const stageLabel = computed(() => {
   const labels = {
     'thinking': '🧠 风格解构 & 大纲规划中...',
     'draft': '✍️ 正在撰写初稿...',
+    'inspect': '🔍 正在进行质量检查...',
     'critique': '💡 AI 深度反思中...',
     'refine': '✨ 深度润色中...'
   }