diff --git a/electron/main/ai/conversations.ts b/electron/main/ai/conversations.ts
index 40640bb..49073bd 100644
--- a/electron/main/ai/conversations.ts
+++ b/electron/main/ai/conversations.ts
@@ -7,6 +7,8 @@ import Database from 'better-sqlite3'
 import * as path from 'path'
 import { getAiDataDir, ensureDir } from '../paths'
 
+const DEFAULT_GENERAL_ID = 'general_cn'
+
 // AI 数据库实例
 let AI_DB: Database.Database | null = null
 
diff --git a/electron/main/ipc/ai.ts b/electron/main/ipc/ai.ts
index b7749a8..75ee098 100644
--- a/electron/main/ipc/ai.ts
+++ b/electron/main/ipc/ai.ts
@@ -1,5 +1,5 @@
 // electron/main/ipc/ai.ts
-import { ipcMain, BrowserWindow, shell } from 'electron'
+import { ipcMain, shell } from 'electron'
 import * as fs from 'fs'
 import * as path from 'path'
 import * as aiConversations from '../ai/conversations'
@@ -13,12 +13,26 @@ import { getActiveConfig, buildPiModel } from '../ai/llm'
 import * as assistantManager from '../ai/assistant'
 import type { AssistantConfig } from '../ai/assistant/types'
 import * as skillManager from '../ai/skills'
-import { completeSimple, streamSimple, type TextContent as PiTextContent } from '@mariozechner/pi-ai'
+import {
+  completeSimple,
+  streamSimple,
+  type Message as PiMessage,
+  type TextContent as PiTextContent,
+} from '@mariozechner/pi-ai'
 import { t } from '../i18n'
 import type { ToolContext } from '../ai/tools/types'
 import { getDefaultRulesForLocale, mergeRulesForLocale } from '../ai/preprocessor/builtin-rules'
 import type { IpcContext } from './types'
 
+function toPiSimpleMessages(messages: Array<{ role: string; content: string }>, timestamp: number): PiMessage[] {
+  // pi-ai 的 simple API 在类型上要求完整 Message 联合，这里沿用现有轻量消息格式并集中做兼容转换。
+  return messages.map((message) => ({
+    role: message.role as 'user' | 'assistant',
+    content: message.content,
+    timestamp,
+  })) as unknown as PiMessage[]
+}
+
 // ==================== AI Agent 请求追踪 ====================
 // 用于跟踪活跃的 Agent 请求，支持中止操作
 const activeAgentRequests = new Map<string, AbortController>()
@@ -147,22 +161,22 @@ export function registerAIHandlers({ win }: IpcContext): void {
    * 创建新的 AI 对话
    * 参数契约与 preload / 数据层保持一致：(sessionId, title?)
    */
-  ipcMain.handle('ai:createConversation', async (_, sessionId: string, title?: string, assistantId?: string) => {
-    try {
-      if (!assistantId) {
-        throw new Error('assistantId is required when creating a conversation')
+  ipcMain.handle(
+    'ai:createConversation',
+    async (_, sessionId: string, title: string | undefined, assistantId: string) => {
+      try {
+        return aiConversations.createConversation(sessionId, title, assistantId)
+      } catch (error) {
+        console.error('Failed to create AI conversation:', error)
+        throw error
       }
-      return aiConversations.createConversation(sessionId, title, assistantId)
-    } catch (error) {
-      console.error('Failed to create AI conversation:', error)
-      throw error
     }
-  })
+  )
 
   /**
    * 获取所有 AI 对话列表
    */
-  ipcMain.handle('ai:getConversations', async (_, sessionId?: string) => {
+  ipcMain.handle('ai:getConversations', async (_, sessionId: string) => {
     try {
       return aiConversations.getConversations(sessionId)
     } catch (error) {
@@ -485,11 +499,7 @@ export function registerAIHandlers({ win }: IpcContext): void {
           piModel,
           {
             systemPrompt: systemMsg?.content,
-            messages: nonSystemMsgs.map((m) => ({
-              role: m.role as 'user' | 'assistant',
-              content: m.content,
-              timestamp: now,
-            })),
+            messages: toPiSimpleMessages(nonSystemMsgs, now),
           },
           {
             apiKey: activeConfig.apiKey,
@@ -536,11 +546,7 @@ export function registerAIHandlers({ win }: IpcContext): void {
           piModel,
           {
             systemPrompt: systemMsg?.content,
-            messages: nonSystemMsgs.map((m) => ({
-              role: m.role as 'user' | 'assistant',
-              content: m.content,
-              timestamp: now,
-            })),
+            messages: toPiSimpleMessages(nonSystemMsgs, now),
           },
           {
             apiKey: activeConfig.apiKey,
diff --git a/electron/preload/apis/ai.ts b/electron/preload/apis/ai.ts
index dbbabf4..54991ee 100644
--- a/electron/preload/apis/ai.ts
+++ b/electron/preload/apis/ai.ts
@@ -419,7 +419,7 @@ export const aiApi = {
   /**
    * 创建 AI 对话
    */
-  createConversation: (sessionId: string, title?: string, assistantId: string): Promise<AIConversation> => {
+  createConversation: (sessionId: string, title: string | undefined, assistantId: string): Promise<AIConversation> => {
     return ipcRenderer.invoke('ai:createConversation', sessionId, title, assistantId)
   },
 
diff --git a/electron/preload/index.d.ts b/electron/preload/index.d.ts
index 44d10f6..d061d66 100644
--- a/electron/preload/index.d.ts
+++ b/electron/preload/index.d.ts
@@ -358,7 +358,7 @@ interface AiApi {
     senderId?: number,
     keywords?: string[]
   ) => Promise<{ messages: SearchMessageResult[]; hasMore: boolean }>
-  createConversation: (sessionId: string, title?: string, assistantId: string) => Promise<AIConversation>
+  createConversation: (sessionId: string, title: string | undefined, assistantId: string) => Promise<AIConversation>
   getConversations: (sessionId: string) => Promise<AIConversation[]>
   getConversation: (conversationId: string) => Promise<AIConversation | null>
   updateConversationTitle: (conversationId: string, title: string) => Promise<boolean>
diff --git a/electron/preload/index.ts b/electron/preload/index.ts
index 26abf4e..11f020a 100644
--- a/electron/preload/index.ts
+++ b/electron/preload/index.ts
@@ -11,6 +11,9 @@ import { chatApi, mergeApi } from './apis/chat'
 import { aiApi, llmApi, agentApi, embeddingApi, assistantApi, skillApi } from './apis/ai'
 import { nlpApi, networkApi, cacheApi, sessionApi } from './apis/utils'
 
+// 为渲染进程提供统一的类型入口，避免 type-only import 指向无导出的运行时代码。
+export type { PreprocessConfig, EmbeddingServiceConfig, EmbeddingServiceConfigDisplay } from './apis/ai'
+
 // Use `contextBridge` APIs to expose Electron APIs to
 // renderer only if context isolation is enabled, otherwise
 // just add to the DOM global.
diff --git a/packages/chart-cluster/ClusterView.vue b/packages/chart-cluster/ClusterView.vue
index e55b8c1..37a0a45 100644
--- a/packages/chart-cluster/ClusterView.vue
+++ b/packages/chart-cluster/ClusterView.vue
@@ -12,7 +12,7 @@ import { TooltipComponent, GridComponent, VisualMapComponent } from 'echarts/com
 import { CanvasRenderer } from 'echarts/renderers'
 import type { EChartsOption } from 'echarts'
 import { loadClusterGraph } from './queries'
-import type { ClusterGraphData, ClusterGraphOptions, ClusterGraphNode } from './types'
+import type { ClusterGraphData, ClusterGraphOptions } from './types'
 
 echarts.use([HeatmapChart, TooltipComponent, GridComponent, VisualMapComponent, CanvasRenderer])
 
diff --git a/src/components/AIChat/GlobalTaskBar.vue b/src/components/AIChat/GlobalTaskBar.vue
index 490630b..1e5bcd7 100644
--- a/src/components/AIChat/GlobalTaskBar.vue
+++ b/src/components/AIChat/GlobalTaskBar.vue
@@ -51,7 +51,7 @@ async function handleOpenTask() {
       <!-- 默认态直接作为返回入口，不再保留额外展开层。 -->
       <button
         class="group flex h-9 items-center gap-1.5 overflow-hidden rounded-full bg-primary-500 px-2 shadow-[0_10px_24px_rgba(15,23,42,0.12)] transition-all hover:-translate-y-0.5 hover:bg-primary-600 hover:shadow-[0_16px_32px_rgba(15,23,42,0.16)] dark:bg-primary-500 dark:hover:bg-primary-400"
-        :title="`${t('ai.chat.backgroundTask.return')} · ${activeTask.sessionName}`"
+        :title="`${t('ai.chat.backgroundTask.return')} · ${activeTask?.sessionName ?? ''}`"
         @click="handleOpenTask"
       >
         <div
diff --git a/src/components/AIChat/assistant/AssistantConfigModal.vue b/src/components/AIChat/assistant/AssistantConfigModal.vue
index b8f95a9..c75c25e 100644
--- a/src/components/AIChat/assistant/AssistantConfigModal.vue
+++ b/src/components/AIChat/assistant/AssistantConfigModal.vue
@@ -387,7 +387,7 @@ function closeModal() {
                   {{ t('ai.assistant.config.presetQuestions') }}
                 </label>
                 <div class="space-y-2">
-                  <div v-for="(q, index) in form.presetQuestions" :key="index" class="flex items-center gap-2">
+                  <div v-for="(_, index) in form.presetQuestions" :key="index" class="flex items-center gap-2">
                     <UInput
                       v-model="form.presetQuestions[index]"
                       class="min-w-0 flex-1"
diff --git a/src/components/AIChat/input/AIChatInput.vue b/src/components/AIChat/input/AIChatInput.vue
index 5f1a6a6..bd79101 100644
--- a/src/components/AIChat/input/AIChatInput.vue
+++ b/src/components/AIChat/input/AIChatInput.vue
@@ -394,7 +394,7 @@ function fillInput(content: string) {
   })
 }
 
-function handleSelectMention(member: MentionCandidate) {
+function handleSelectMention(member: Pick<MentionCandidate, 'memberId' | 'platformId' | 'displayName' | 'insertName' | 'aliases'>) {
   if (props.disabled || !mentionRange.value) return
 
   const prefix = inputValue.value.slice(0, mentionRange.value.start)
diff --git a/src/components/analysis/SQLLab/types.ts b/src/components/analysis/SQLLab/types.ts
index 75ab3c5..efe9cea 100644
--- a/src/components/analysis/SQLLab/types.ts
+++ b/src/components/analysis/SQLLab/types.ts
@@ -33,10 +33,10 @@ export interface SQLResult {
   limited: boolean
 }
 
-// 表/列的多语言标签映射
-type LocaleType = 'zh-CN' | 'en-US'
+// 表/列标签目前只维护中英文；其他 locale 先归一化后复用。
+type LabelLocale = 'zh-CN' | 'en-US'
 
-export const TABLE_LABELS: Record<LocaleType, Record<string, string>> = {
+export const TABLE_LABELS: Record<LabelLocale, Record<string, string>> = {
   'zh-CN': {
     message: '消息记录',
     member: '成员',
@@ -51,7 +51,7 @@ export const TABLE_LABELS: Record<LocaleType, Record<string, string>> = {
   },
 }
 
-export const COLUMN_LABELS: Record<LocaleType, Record<string, Record<string, string>>> = {
+export const COLUMN_LABELS: Record<LabelLocale, Record<string, Record<string, string>>> = {
   'zh-CN': {
     message: {
       id: '消息ID',
@@ -119,11 +119,15 @@ export const COLUMN_LABELS: Record<LocaleType, Record<string, Record<string, str
 }
 
 // 获取表的标签
-export function getTableLabel(tableName: string, locale: LocaleType = 'zh-CN'): string {
-  return TABLE_LABELS[locale]?.[tableName] || tableName
+export function getTableLabel(tableName: string, locale: string = 'zh-CN'): string {
+  return TABLE_LABELS[normalizeLabelLocale(locale)]?.[tableName] || tableName
 }
 
 // 获取列的标签
-export function getColumnLabel(tableName: string, columnName: string, locale: LocaleType = 'zh-CN'): string {
-  return COLUMN_LABELS[locale]?.[tableName]?.[columnName] || columnName
+export function getColumnLabel(tableName: string, columnName: string, locale: string = 'zh-CN'): string {
+  return COLUMN_LABELS[normalizeLabelLocale(locale)]?.[tableName]?.[columnName] || columnName
+}
+
+function normalizeLabelLocale(locale: string): LabelLocale {
+  return locale.startsWith('zh') ? 'zh-CN' : 'en-US'
 }
diff --git a/src/components/common/ChatRecord/BatchSummaryModal.vue b/src/components/common/ChatRecord/BatchSummaryModal.vue
index 0453a7c..149d1d2 100644
--- a/src/components/common/ChatRecord/BatchSummaryModal.vue
+++ b/src/components/common/ChatRecord/BatchSummaryModal.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, watch, nextTick } from 'vue'
 import { useI18n } from 'vue-i18n'
-import { useDateFormat, useDebounceFn } from '@vueuse/core'
+import { useDebounceFn } from '@vueuse/core'
 
 const props = defineProps<{
   open: boolean
@@ -34,8 +34,8 @@ type TimeRangePreset = 'today' | 'yesterday' | 'week' | 'month' | 'custom'
 const selectedPreset = ref<TimeRangePreset>('today')
 
 // 自定义时间范围
-const customStartDate = ref<Date | null>(null)
-const customEndDate = ref<Date | null>(null)
+const customStartDate = ref('')
+const customEndDate = ref('')
 
 // 会话列表
 interface SessionItem {
@@ -43,7 +43,8 @@ interface SessionItem {
   startTs: number
   endTs: number
   messageCount: number
-  summary: string | null
+  // 与 sessionApi 返回值保持一致，历史数据里 summary 可能不存在。
+  summary?: string | null
 }
 const sessions = ref<SessionItem[]>([])
 const isLoading = ref(false)
@@ -102,9 +103,11 @@ const timeRange = computed(() => {
     }
     case 'custom':
       if (customStartDate.value && customEndDate.value) {
+        const start = new Date(customStartDate.value)
+        const end = new Date(customEndDate.value)
         return {
-          start: customStartDate.value.getTime(),
-          end: new Date(customEndDate.value.getTime() + 24 * 60 * 60 * 1000 - 1).getTime(), // 当天结束
+          start: start.getTime(),
+          end: new Date(end.getTime() + 24 * 60 * 60 * 1000 - 1).getTime(), // 当天结束
         }
       }
       return null
@@ -331,11 +334,6 @@ function close() {
   }
   emit('update:open', false)
 }
-
-// 格式化时间戳
-function formatTs(ts: number) {
-  return useDateFormat(new Date(ts * 1000), 'MM-DD HH:mm').value
-}
 </script>
 
 <template>
diff --git a/src/config/prompts.ts b/src/config/prompts.ts
index 553d6e9..5854799 100644
--- a/src/config/prompts.ts
+++ b/src/config/prompts.ts
@@ -134,7 +134,7 @@ export function getDefaultRoleDefinition(locale: LocaleType = 'zh-CN'): string {
 }
 
 /** @deprecated responseRules 已合并到 systemPrompt */
-export function getDefaultResponseRules(locale: LocaleType = 'zh-CN'): string {
+export function getDefaultResponseRules(_locale: LocaleType = 'zh-CN'): string {
   return ''
 }
 
diff --git a/src/pages/settings/components/AI/AIModelEditModal.vue b/src/pages/settings/components/AI/AIModelEditModal.vue
index e638c62..6e7e2e6 100644
--- a/src/pages/settings/components/AI/AIModelEditModal.vue
+++ b/src/pages/settings/components/AI/AIModelEditModal.vue
@@ -39,7 +39,7 @@ interface AIServiceConfig {
   id: string
   name: string
   provider: string
-  apiKey: string
+  apiKey?: string
   apiKeySet: boolean
   model?: string
   baseUrl?: string
diff --git a/src/pages/settings/components/AI/ApiKeyInput.vue b/src/pages/settings/components/AI/ApiKeyInput.vue
index 75e691d..42f1656 100644
--- a/src/pages/settings/components/AI/ApiKeyInput.vue
+++ b/src/pages/settings/components/AI/ApiKeyInput.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, useAttrs, computed } from 'vue'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     modelValue: string
     placeholder?: string
diff --git a/src/pages/settings/components/AI/RAGConfigTab.vue b/src/pages/settings/components/AI/RAGConfigTab.vue
index 423553a..10b2550 100644
--- a/src/pages/settings/components/AI/RAGConfigTab.vue
+++ b/src/pages/settings/components/AI/RAGConfigTab.vue
@@ -26,7 +26,6 @@ const editingConfig = ref<EmbeddingServiceConfigDisplay | null>(null)
 const isLoading = computed(() => embeddingStore.isLoading)
 const configs = computed(() => embeddingStore.configs)
 const activeConfigId = computed(() => embeddingStore.activeConfigId)
-const hasConfig = computed(() => embeddingStore.hasConfig)
 const isMaxConfigs = computed(() => embeddingStore.isMaxConfigs)
 const vectorStoreStats = computed(() => embeddingStore.vectorStoreStats)
 const vectorStoreSizeFormatted = computed(() => embeddingStore.vectorStoreSizeFormatted)
diff --git a/src/pages/settings/components/BatchManageTab.vue b/src/pages/settings/components/BatchManageTab.vue
index 38f5eef..dbcb217 100644
--- a/src/pages/settings/components/BatchManageTab.vue
+++ b/src/pages/settings/components/BatchManageTab.vue
@@ -51,13 +51,6 @@ const canMerge = computed(() => {
   return platforms.size === 1
 })
 
-// 选中会话的平台
-const selectedPlatform = computed(() => {
-  if (selectedIds.value.size === 0) return null
-  const selectedSessions = sessions.value.filter((s) => selectedIds.value.has(s.id))
-  return selectedSessions[0]?.platform || null
-})
-
 // 全选状态（基于过滤后的列表）
 const isAllSelected = computed(() => {
   return filteredSessions.value.length > 0 && filteredSessions.value.every((s) => selectedIds.value.has(s.id))
diff --git a/src/stores/aiChat.ts b/src/stores/aiChat.ts
index c4b8add..ea3be34 100644
--- a/src/stores/aiChat.ts
+++ b/src/stores/aiChat.ts
@@ -381,6 +381,16 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
     activeTask.value = null
   }
 
+  /**
+   * 会话创建成功后，把后台任务绑定到真实 conversationId。
+   * 单独抽成 helper，避免在长 async 流程里触发异常的类型缩窄。
+   */
+  function updateActiveTaskConversationId(chatKey: string, conversationId: string): void {
+    if (!activeTask.value) return
+    if (activeTask.value.chatKey !== chatKey) return
+    activeTask.value.conversationId = conversationId
+  }
+
   function buildFallbackAgentStatus(state: AIChatSessionState): AgentRuntimeStatus {
     return {
       phase: 'preparing',
@@ -742,9 +752,7 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
         resolvedConversationId = conversation.id
         renameBufferKey(state, DRAFT_CONVERSATION_KEY, conversation.id)
         targetBuffer.assistantId = currentAssistantId
-        if (activeTask.value?.chatKey === chatKey) {
-          activeTask.value.conversationId = conversation.id
-        }
+        updateActiveTaskConversationId(chatKey, conversation.id)
       }
 
       const maxHistoryRounds = aiGlobalSettings.value.maxHistoryRounds ?? 5
diff --git a/src/stores/embedding.ts b/src/stores/embedding.ts
index 0a75c20..819a5b3 100644
--- a/src/stores/embedding.ts
+++ b/src/stores/embedding.ts
@@ -66,10 +66,9 @@ export const useEmbeddingStore = defineStore('embedding', () => {
   async function loadConfigs() {
     isLoading.value = true
     try {
-      const [configsData, activeId, isEnabled, stats] = await Promise.all([
+      const [configsData, activeId, stats] = await Promise.all([
         window.embeddingApi.getAllConfigs(),
         window.embeddingApi.getActiveConfigId(),
-        window.embeddingApi.isEnabled(),
         window.embeddingApi.getVectorStoreStats(),
       ])
       configs.value = configsData