diff --git a/.gitignore b/.gitignore
index dd30f6b..bbe56bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 node_modules
 *.tsbuildinfo
+electron.vite.config.[0-9]*.mjs
 dist
 out
 .env
@@ -24,4 +25,4 @@ skills-lock.json
 
 findings.md
 progress.md
-task_plan.md
\ No newline at end of file
+task_plan.md
diff --git a/electron.vite.config.1789066213093.mjs b/electron.vite.config.1789066213093.mjs
deleted file mode 100644
index 1d0f7b7..0000000
--- a/electron.vite.config.1789066213093.mjs
+++ /dev/null
@@ -1,35 +0,0 @@
-// electron.vite.config.ts
-import { resolve } from "path";
-import { defineConfig } from "electron-vite";
-import react from "@vitejs/plugin-react";
-var electron_vite_config_default = defineConfig({
-  main: {
-    build: {
-      rollupOptions: {
-        input: {
-          index: resolve("src/main/index.ts"),
-          reportTemplateTest: resolve("src/main/report-template-test-entry.ts"),
-          queryAgentPoc: resolve("src/main/query-agent-poc-entry.ts"),
-          voiceRecognitionWorker: resolve("src/main/voice-pipeline/voice-recognition-worker.ts"),
-          knowledgeWorker: resolve("src/main/knowledge/knowledge-worker.ts")
-        },
-        output: {
-          entryFileNames: "[name].js"
-        },
-        external: ["koffi", "sherpa-onnx-node"]
-      }
-    }
-  },
-  preload: {},
-  renderer: {
-    resolve: {
-      alias: {
-        "@renderer": resolve("src/renderer/src")
-      }
-    },
-    plugins: [react()]
-  }
-});
-export {
-  electron_vite_config_default as default
-};
diff --git a/src/main/services/local-query-api-service.ts b/src/main/services/local-query-api-service.ts
index 015361b..cbfe864 100644
--- a/src/main/services/local-query-api-service.ts
+++ b/src/main/services/local-query-api-service.ts
@@ -86,9 +86,9 @@ function rangeEndMs(range: ResolvedTimeRange, fallbackNowMs: number): number {
 
 /** 本地时间（`MM-DD HH:mm`）；只用于给模型一句可引用的人话，不参与任何判断。 */
 function formatLocalMinute(ms: number): string {
-  const date = new Date(ms)
+  const date = new Date(ms + 8 * 60 * 60 * 1000)
   const pad = (value: number): string => String(value).padStart(2, '0')
-  return `${pad(date.getMonth() + 1)}-${pad(date.getDate())} ${pad(date.getHours())}:${pad(date.getMinutes())}`
+  return `${pad(date.getUTCMonth() + 1)}-${pad(date.getUTCDate())} ${pad(date.getUTCHours())}:${pad(date.getUTCMinutes())}`
 }
 
 /**
diff --git a/src/shared/ai-search.ts b/src/shared/ai-search.ts
index 78b59ae..5e848b1 100644
--- a/src/shared/ai-search.ts
+++ b/src/shared/ai-search.ts
@@ -399,14 +399,27 @@ export const aiSearchRangeStart = (range: AiSearchRange): number | undefined =>
   return Math.floor(Date.now() / 1000) - (range === '7d' ? 7 : 30) * 86400
 }
 
-const dayStart = (date: Date): number =>
-  Math.floor(new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime() / 1000)
+// Natural-language dates use the app's explicit China Standard Time calendar,
+// independent of the host OS timezone (CI may run in UTC).
+const APP_TIMEZONE_OFFSET_MS = 8 * 60 * 60 * 1000
+const appCalendar = (date: Date): Date => new Date(date.getTime() + APP_TIMEZONE_OFFSET_MS)
+const appDateEpochSeconds = (year: number, month: number, day: number): number =>
+  Math.floor((Date.UTC(year, month, day) - APP_TIMEZONE_OFFSET_MS) / 1000)
 
-const currentYearStart = (date: Date): number =>
-  Math.floor(new Date(date.getFullYear(), 0, 1).getTime() / 1000)
+const dayStart = (date: Date): number => {
+  const local = appCalendar(date)
+  return appDateEpochSeconds(local.getUTCFullYear(), local.getUTCMonth(), local.getUTCDate())
+}
 
-const currentMonthStart = (date: Date): number =>
-  Math.floor(new Date(date.getFullYear(), date.getMonth(), 1).getTime() / 1000)
+const currentYearStart = (date: Date): number => {
+  const local = appCalendar(date)
+  return appDateEpochSeconds(local.getUTCFullYear(), 0, 1)
+}
+
+const currentMonthStart = (date: Date): number => {
+  const local = appCalendar(date)
+  return appDateEpochSeconds(local.getUTCFullYear(), local.getUTCMonth(), 1)
+}
 
 const CHINESE_NUMBERS: Record<string, number> = {
   一: 1,
@@ -468,9 +481,12 @@ export const inferAiSearchTimeRange = (
   }
   if (/这个月|本月/.test(query)) return fromQuery(currentMonthStart(now), '本月', '用户说“这个月”')
   if (/上个月/.test(query)) {
-    const startDate = new Date(now.getFullYear(), now.getMonth() - 1, 1)
-    const end = Math.floor(new Date(now.getFullYear(), now.getMonth(), 1).getTime() / 1000) - 1
-    const start = Math.floor(startDate.getTime() / 1000)
+    const local = appCalendar(now)
+    const year = local.getUTCFullYear()
+    const month = local.getUTCMonth()
+    const startDate = new Date(Date.UTC(year, month - 1, 1))
+    const end = appDateEpochSeconds(year, month, 1) - 1
+    const start = appDateEpochSeconds(startDate.getUTCFullYear(), startDate.getUTCMonth(), 1)
     return {
       startTime: start,
       endTime: end,
@@ -492,10 +508,11 @@ export const inferAiSearchTimeRange = (
     }
   }
   if (/去年/.test(query)) {
-    const startDate = new Date(now.getFullYear() - 1, 0, 1)
+    const year = appCalendar(now).getUTCFullYear()
+    const startDate = new Date(Date.UTC(year - 1, 0, 1))
     return {
-      startTime: Math.floor(startDate.getTime() / 1000),
-      endTime: Math.floor(new Date(now.getFullYear(), 0, 1).getTime() / 1000) - 1,
+      startTime: appDateEpochSeconds(year - 1, 0, 1),
+      endTime: appDateEpochSeconds(year, 0, 1) - 1,
       label: `${startDate.getFullYear()}年`,
       reason: '用户说“去年”',
       source: 'query'
diff --git a/tests/unit/ai-search-time-range.test.ts b/tests/unit/ai-search-time-range.test.ts
index 273f263..7435fd8 100644
--- a/tests/unit/ai-search-time-range.test.ts
+++ b/tests/unit/ai-search-time-range.test.ts
@@ -23,7 +23,7 @@ describe('AI search natural-language time ranges', () => {
     })
     expect(inferAiSearchTimeRange('我和张三今年聊了什么？', 'all', NOW)).toMatchObject({
       label: '今年',
-      startTime: Math.floor(new Date(2026, 0, 1).getTime() / 1000)
+      startTime: Math.floor(new Date('2026-01-01T00:00:00+08:00').getTime() / 1000)
     })
   })
 
diff --git a/tests/unit/settings-navigation.test.ts b/tests/unit/settings-navigation.test.ts
index 9fd700c..0ade876 100644
--- a/tests/unit/settings-navigation.test.ts
+++ b/tests/unit/settings-navigation.test.ts
@@ -9,6 +9,7 @@ describe('settings navigation', () => {
     const intelligent = SETTINGS_NAVIGATION.find((group) => group.label === '智能能力')
     expect(intelligent?.items.map((item) => item.id)).toEqual([
       'wechat-send',
+      'wechat-action-logs',
       'voice-recognition',
       'text-to-speech',
       'ai-model'