diff --git a/frontend/src/components/ContextManager.vue b/frontend/src/components/ContextManager.vue
index d8cf894..b8c68ed 100644
--- a/frontend/src/components/ContextManager.vue
+++ b/frontend/src/components/ContextManager.vue
@@ -107,7 +107,7 @@ const extractMetadata = (content: string) => {
 
   // 1. Extract Title (First H1 or first non-empty line)
   const titleMatch = content.match(/^#\s+(.*)/m)
-  if (titleMatch) {
+  if (titleMatch && titleMatch[1]) {
     title = titleMatch[1].trim()
   } else {
     const firstLine = lines.find(l => l.trim().length > 0)
@@ -136,12 +136,12 @@ const extractMetadata = (content: string) => {
   // Look for "Core Logic", "Architecture", "Introduction" headers
   const logicRegex = /##\s*(Core Logic|Architecture|Introduction|About|Features)([\s\S]*?)(##|$)/i
   const logicMatch = content.match(logicRegex)
-  if (logicMatch) {
+  if (logicMatch && logicMatch[2]) {
     coreLogic = logicMatch[2].trim().substring(0, 300) + (logicMatch[2].length > 300 ? '...' : '')
   } else {
     // Fallback: First paragraph after title
     const paragraphs = content.split(/\n\s*\n/)
-    if (paragraphs.length > 1) {
+    if (paragraphs.length > 1 && paragraphs[1]) {
       coreLogic = paragraphs[1].trim().substring(0, 200) + '...'
     }
   }
diff --git a/frontend/src/components/LLMSettings.vue b/frontend/src/components/LLMSettings.vue
index 44d71ba..990cb79 100644
--- a/frontend/src/components/LLMSettings.vue
+++ b/frontend/src/components/LLMSettings.vue
@@ -52,7 +52,7 @@
           </div>
 
           <!-- 选中提供商说明 -->
-          <div class="provider-info">
+          <div class="provider-info" v-if="selectedProvider">
             <span class="provider-desc">{{ selectedProvider.desc }}</span>
             <span class="provider-pricing">{{ selectedProvider.pricing }}</span>
           </div>
@@ -63,7 +63,7 @@
           <h2 class="section-title">连接配置</h2>
 
           <!-- API 密钥配置 -->
-          <div v-if="showApiKey" class="form-group">
+          <div v-if="showApiKey && selectedProvider" class="form-group">
             <label class="form-label">API 密钥</label>
             <input
               v-model="apiKey"
@@ -161,13 +161,6 @@ const KeyIcon = () => h('svg', { viewBox: '0 0 24 24', fill: 'none', stroke: 'cu
   h('path', { d: 'M21 2l-2 2m-7.61 7.61a5.5 5.5 0 1 1-7.778 7.778 5.5 5.5 0 0 1 7.777-7.777zm0 0L15.5 7.5m0 0l3 3L22 7l-3-3m-3.5 3.5L19 4' })
 ])
 
-const ServerIcon = () => h('svg', { viewBox: '0 0 24 24', fill: 'none', stroke: 'currentColor', 'stroke-width': 1.5 }, [
-  h('rect', { x: '2', y: '2', width: '20', height: '8', rx: '2', ry: '2' }),
-  h('rect', { x: '2', y: '14', width: '20', height: '8', rx: '2', ry: '2' }),
-  h('line', { x1: '6', y1: '6', x2: '6.01', y2: '6' }),
-  h('line', { x1: '6', y1: '18', x2: '6.01', y2: '18' })
-])
-
 // 侧边栏导航
 const navItems = [
   { key: 'provider', label: '模型服务', icon: CloudIcon },
diff --git a/frontend/src/components/SignalDashboard.vue b/frontend/src/components/SignalDashboard.vue
index 90cbb2e..7dd8ee0 100644
--- a/frontend/src/components/SignalDashboard.vue
+++ b/frontend/src/components/SignalDashboard.vue
@@ -21,11 +21,11 @@
         <div class="progress-comparison">
            <div class="progress-row">
              <span class="label">我方</span>
-             <n-progress type="line" :percentage="getOurProgress(selectedSignal)" color="#63e2b7" rail-color="rgba(255,255,255,0.1)" height="6" processing />
+             <n-progress type="line" :percentage="Number(getOurProgress(selectedSignal))" color="#63e2b7" rail-color="rgba(255,255,255,0.1)" :height="6" processing />
            </div>
            <div class="progress-row">
              <span class="label">竞品</span>
-             <n-progress type="line" :percentage="getCompetitorProgress(selectedSignal)" color="#f5222d" rail-color="rgba(255,255,255,0.1)" height="6" />
+             <n-progress type="line" :percentage="Number(getCompetitorProgress(selectedSignal))" color="#f5222d" rail-color="rgba(255,255,255,0.1)" :height="6" />
            </div>
            <div class="lead-time-text" v-if="selectedSignal">
              {{ getLeadTimeText(selectedSignal) }}
@@ -134,18 +134,18 @@
                   'new-signal-flash': isNewSignal(signal.latestSignal)
                 }"
               >
-                <template #header>
+                <n-card-header>
                   <div style="display: flex; justify-content: space-between; align-items: center;">
                     <div style="display: flex; align-items: center; gap: 6px;">
-                      <n-tag :type="getPriorityType(signal.latestSignal.priority)" size="small" round>
-                        {{ getPriorityLabel(signal.latestSignal.priority) }}
+                      <n-tag :type="getPriorityType(signal.latestSignal?.priority || 'medium')" size="small" round>
+                        {{ getPriorityLabel(signal.latestSignal?.priority || 'medium') }}
                       </n-tag>
                       <n-tag :type="getImpactColor(signal.impact_score)" size="small" round>{{ signal.source }}</n-tag>
                       <n-tag v-if="signal.count > 1" type="info" size="tiny" round>{{ signal.count }}条</n-tag>
                     </div>
                     <n-text depth="3" style="font-size: 12px;">{{ formatDate(signal.created_at) }}</n-text>
                   </div>
-                </template>
+                </n-card-header>
                 <n-text class="signal-content" :depth="1">{{ signal.content }}</n-text>
               </n-list-item>
             </n-list>
@@ -493,7 +493,7 @@
                               :percentage="getTaskProgress(task)"
                               :color="getTaskTypeColor(task.type, true)"
                               rail-color="rgba(255,255,255,0.1)"
-                              height="4"
+                              :height="4"
                               :show-indicator="false"
                               style="margin-top: 8px;"
                               :class="{ 'progress-pulse': taskExecuting }"
@@ -543,7 +543,7 @@
     <n-modal v-model:show="showCompetitorModal">
       <n-card style="width: 400px" title="⚔️ 设定主要竞品（某漫、某画等）" :bordered="false" size="large" role="dialog" aria-modal="true" class="glass-modal">
         <n-space vertical>
-           <n-input v-for="(comp, index) in competitors" :key="index" v-model:value="competitors[index]" placeholder="输入竞品名称..." />
+           <n-input v-for="(_comp, index) in competitors" :key="index" v-model:value="competitors[index]" placeholder="输入竞品名称..." />
         </n-space>
         <template #footer>
           <n-button type="primary" block @click="saveCompetitors">
@@ -573,11 +573,11 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted, onUnmounted, reactive, watch, nextTick, computed } from 'vue'
+import { ref, onMounted, onUnmounted, reactive, watch, computed } from 'vue'
 import { 
   NLayout, NLayoutSider, NLayoutContent, NSpace, NCard, NButton, NList, NListItem, NTag, NText, 
-  NGrid, NGridItem, NDivider, NResult, NCheckbox, NThing, NScrollbar, NSpin, NModal, NForm, NFormItem, 
-  NInput, useMessage, NEmpty, NProgress, NIcon, NSteps, NStep, NStatistic
+  NGrid, NGridItem, NScrollbar, NSpin, NModal, NForm, NFormItem, 
+  NInput, useMessage, NProgress, NIcon, NSteps, NStep, NStatistic, NCardHeader
 } from 'naive-ui'
 import axios from 'axios'
 import VChart from 'vue-echarts'
@@ -859,12 +859,14 @@ const factSnippets: Record<string, { title: string; source: string; content: str
 
 const showFactSnippetModal = (type: string) => {
   const snippet = factSnippets[type] || factSnippets['Whitepaper']
-  currentFactSnippet.value = {
-    title: snippet.title,
-    source: snippet.source,
-    content: snippet.content
+  if (snippet) {
+    currentFactSnippet.value = {
+      title: snippet.title,
+      source: snippet.source,
+      content: snippet.content
+    }
+    showFactSnippet.value = true
   }
-  showFactSnippet.value = true
 }
 
 // --- Logic ---
@@ -947,8 +949,8 @@ const getRelatedKnowledgeNodes = () => {
   return Array.isArray(knowledgeNodes) ? knowledgeNodes : []
 }
 
-const getTechStackType = (category: string) => {
-  const typeMap: Record<string, string> = {
+const getTechStackType = (category: string): 'default' | 'error' | 'success' | 'warning' | 'info' | 'primary' => {
+  const typeMap: Record<string, 'default' | 'error' | 'success' | 'warning' | 'info' | 'primary'> = {
     framework: 'success',
     model: 'error',
     tool: 'info',
@@ -994,8 +996,8 @@ const getKnowledgeNodeIcon = (category: string) => {
   return iconMap[category] || '🧠'
 }
 
-const getKnowledgeNodeType = (category: string) => {
-  const typeMap: Record<string, string> = {
+const getKnowledgeNodeType = (category: string): 'default' | 'error' | 'success' | 'warning' | 'info' | 'primary' => {
+  const typeMap: Record<string, 'default' | 'error' | 'success' | 'warning' | 'info' | 'primary'> = {
     tech_stack: 'success',
     competitor: 'error',
     market: 'info'
@@ -1163,13 +1165,13 @@ const getPriorityLabel = (priority: string) => {
 }
 
 // Voting helpers
-const getModelVoteType = (modelName: string, strategicInfo: any) => {
+const getModelVoteType = (_modelName: string, strategicInfo: any) => {
   // For now, since we don't have individual model results in the response,
   // we'll return a default type. This could be enhanced if we send individual results.
   return strategicInfo.is_strategic ? 'success' : 'default'
 }
 
-const getModelVoteLabel = (modelName: string, strategicInfo: any) => {
+const getModelVoteLabel = (_modelName: string, strategicInfo: any) => {
   // Similar to above, placeholder logic
   return strategicInfo.is_strategic ? '战略级' : '非战略'
 }
@@ -1617,7 +1619,6 @@ const checkOllamaStatus = async () => {
       // 本地 Ollama
       ollamaReady.value = data.status === 'ready'
       const modelCount = data.model_count || 0
-      const models = data.available_models || []
 
       if (ollamaReady.value) {
         message.success(`✅ Ollama 已就绪 (${modelCount} 个模型)`)
@@ -1651,7 +1652,7 @@ const startOllama = async () => {
     } else {
       message.error(response.data.message)
     }
-  } catch (error) {
+  } catch (error: any) {
     message.error('启动失败: ' + (error.response?.data?.detail || error.message))
   } finally {
     startingOllama.value = false