diff --git a/client/src/api/index.ts b/client/src/api/index.ts
index 74549ec..1e1401c 100644
--- a/client/src/api/index.ts
+++ b/client/src/api/index.ts
@@ -29,6 +29,8 @@ type BodyOf<P extends keyof paths, M extends Methods> = paths[P][M] extends {
 // ---- 常用响应类型 ----
 export type DashboardOverview = SuccessBody<paths['/api/dashboard/overview']['get']>
 export type DashboardTrends = SuccessBody<paths['/api/dashboard/trends']['get']>
+export type DashboardMastery = SuccessBody<paths['/api/dashboard/mastery']['get']>
+export type DashboardWeakPoints = SuccessBody<paths['/api/dashboard/weak-points']['get']>
 export type PracticeModules = SuccessBody<paths['/api/practice/modules']['get']>
 export type Profile = SuccessBody<paths['/api/profile']['get']>
 export type Settings = SuccessBody<paths['/api/settings']['get']>
@@ -37,7 +39,9 @@ export type Settings = SuccessBody<paths['/api/settings']['get']>
 export const dashboardApi = {
   overview: () => unwrap(apiClient.GET('/api/dashboard/overview')),
   trends: (days?: number) =>
-    unwrap(apiClient.GET('/api/dashboard/trends', { params: { query: { days } } }))
+    unwrap(apiClient.GET('/api/dashboard/trends', { params: { query: { days } } })),
+  mastery: () => unwrap(apiClient.GET('/api/dashboard/mastery')),
+  weakPoints: () => unwrap(apiClient.GET('/api/dashboard/weak-points'))
 }
 
 // ---- 刷题 ----
diff --git a/client/src/components/charts/AppLineChart.vue b/client/src/components/charts/AppLineChart.vue
new file mode 100644
index 0000000..f3be920
--- /dev/null
+++ b/client/src/components/charts/AppLineChart.vue
@@ -0,0 +1,170 @@
+<script setup lang="ts">
+import { computed, onMounted, onUnmounted, ref } from 'vue'
+
+export interface LinePoint {
+  date: string
+  value: number
+}
+
+const props = withDefaults(
+  defineProps<{
+    points: LinePoint[]
+    target?: number
+    height?: number
+  }>(),
+  { target: 0, height: 220 }
+)
+
+const container = ref<HTMLElement | null>(null)
+const width = ref(680)
+let observer: ResizeObserver | null = null
+
+onMounted(() => {
+  if (!container.value) return
+  width.value = container.value.clientWidth
+  observer = new ResizeObserver((entries) => {
+    const w = entries[0]?.contentRect.width
+    if (w) width.value = w
+  })
+  observer.observe(container.value)
+})
+onUnmounted(() => observer?.disconnect())
+
+const pad = { left: 30, right: 14, top: 16, bottom: 26 }
+const chartW = computed(() => Math.max(10, width.value - pad.left - pad.right))
+const chartH = computed(() => Math.max(40, props.height - pad.top - pad.bottom))
+
+const values = computed(() => props.points.map((p) => p.value))
+const maxV = computed(() => {
+  const max = Math.max(0, ...values.value, props.target)
+  if (max === 0) return 100
+  return Math.ceil(max / 10) * 10
+})
+const minV = computed(() => {
+  const min = Math.min(...values.value, props.target)
+  return Math.max(0, Math.floor(min / 10) * 10)
+})
+const range = computed(() => Math.max(1, maxV.value - minV.value))
+
+const n = computed(() => Math.max(props.points.length, 1))
+const slot = computed(() => chartW.value / n.value)
+
+function yOf(value: number): number {
+  return pad.top + chartH.value - ((value - minV.value) / range.value) * chartH.value
+}
+
+const path = computed(() => {
+  if (props.points.length === 0) return ''
+  return props.points
+    .map((p, i) => {
+      const cx = pad.left + slot.value * (i + 0.5)
+      const cy = yOf(p.value)
+      return `${i === 0 ? 'M' : 'L'}${cx.toFixed(1)},${cy.toFixed(1)}`
+    })
+    .join(' ')
+})
+
+const areaPath = computed(() => {
+  if (props.points.length === 0) return ''
+  const last = props.points.length - 1
+  const firstX = pad.left + slot.value * 0.5
+  const lastX = pad.left + slot.value * (last + 0.5)
+  const bottom = pad.top + chartH.value
+  return `${path.value} L${lastX.toFixed(1)},${bottom} L${firstX.toFixed(1)},${bottom} Z`
+})
+
+const dots = computed(() =>
+  props.points.map((p, i) => ({
+    cx: pad.left + slot.value * (i + 0.5),
+    cy: yOf(p.value),
+    value: p.value,
+    date: p.date
+  }))
+)
+
+const targetY = computed(() => (props.target > 0 ? yOf(props.target) : null))
+
+const xTicks = computed(() => {
+  const count = props.points.length
+  const step = count <= 7 ? 1 : Math.ceil(count / 7)
+  return props.points
+    .map((p, i) => ({ ...p, i }))
+    .filter((p) => p.i % step === 0 || p.i === count - 1)
+    .map((p) => ({
+      cx: pad.left + slot.value * (p.i + 0.5),
+      label: `${Number(p.date.slice(5, 7))}/${Number(p.date.slice(8, 10))}`
+    }))
+})
+
+const gridValues = computed(() => [minV.value, (minV.value + maxV.value) / 2, maxV.value])
+</script>
+
+<template>
+  <div ref="container" class="line-chart">
+    <svg :width="width" :height="height" class="line-chart__svg" role="img" aria-label="模考成绩趋势图">
+      <template v-if="points.length">
+        <!-- 网格线 -->
+        <g v-for="(v, i) in gridValues" :key="i">
+          <line
+            :x1="pad.left" :y1="yOf(v)" :x2="pad.left + chartW" :y2="yOf(v)"
+            stroke="var(--border-subtle)" stroke-width="1"
+          />
+          <text
+            :x="pad.left - 6" :y="yOf(v) + 3"
+            text-anchor="end" font-size="10" fill="var(--text-muted)"
+          >{{ Math.round(v) }}</text>
+        </g>
+
+        <!-- 目标参考线 -->
+        <g v-if="targetY !== null">
+          <line
+            :x1="pad.left" :y1="targetY" :x2="pad.left + chartW" :y2="targetY"
+            stroke="var(--warning)" stroke-width="1" stroke-dasharray="4 4"
+          />
+          <text
+            :x="pad.left + chartW" :y="targetY - 5"
+            text-anchor="end" font-size="10" fill="var(--warning)"
+          >目标 {{ target }}</text>
+        </g>
+
+        <!-- 面积 -->
+        <path v-if="areaPath" :d="areaPath" fill="var(--primary-bright)" opacity="0.12" />
+        <!-- 折线 -->
+        <path
+          v-if="path"
+          :d="path"
+          fill="none"
+          stroke="var(--primary)"
+          stroke-width="2.5"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+        />
+        <circle
+          v-for="(d, i) in dots"
+          :key="i"
+          :cx="d.cx" :cy="d.cy" r="3.5"
+          fill="var(--bg-card)" stroke="var(--primary)" stroke-width="2"
+        >
+          <title>{{ d.date }} · {{ d.value }} 分</title>
+        </circle>
+
+        <!-- x 轴标签 -->
+        <text
+          v-for="(t, i) in xTicks"
+          :key="i"
+          :x="t.cx" :y="height - 6"
+          text-anchor="middle" font-size="10" fill="var(--text-muted)"
+        >{{ t.label }}</text>
+      </template>
+    </svg>
+  </div>
+</template>
+
+<style scoped>
+.line-chart {
+  width: 100%;
+}
+.line-chart__svg {
+  display: block;
+}
+</style>
diff --git a/client/src/components/charts/AppTrendChart.vue b/client/src/components/charts/AppTrendChart.vue
new file mode 100644
index 0000000..bbd307b
--- /dev/null
+++ b/client/src/components/charts/AppTrendChart.vue
@@ -0,0 +1,199 @@
+<script setup lang="ts">
+import { computed, onMounted, onUnmounted, ref } from 'vue'
+
+export interface TrendPoint {
+  date: string
+  answered: number
+  accuracy: number
+}
+
+const props = withDefaults(
+  defineProps<{
+    points: TrendPoint[]
+    height?: number
+  }>(),
+  { height: 220 }
+)
+
+const container = ref<HTMLElement | null>(null)
+const width = ref(680)
+let observer: ResizeObserver | null = null
+
+onMounted(() => {
+  if (!container.value) return
+  width.value = container.value.clientWidth
+  observer = new ResizeObserver((entries) => {
+    const w = entries[0]?.contentRect.width
+    if (w) width.value = w
+  })
+  observer.observe(container.value)
+})
+onUnmounted(() => observer?.disconnect())
+
+const pad = { left: 34, right: 34, top: 14, bottom: 26 }
+const chartW = computed(() => Math.max(10, width.value - pad.left - pad.right))
+const chartH = computed(() => Math.max(40, props.height - pad.top - pad.bottom))
+
+const maxAnswered = computed(() => {
+  const max = props.points.reduce((m, p) => Math.max(m, p.answered), 0)
+  if (max === 0) return 5
+  const step = 5
+  return Math.ceil(max / step) * step
+})
+
+const n = computed(() => Math.max(props.points.length, 1))
+const slot = computed(() => chartW.value / n.value)
+const barW = computed(() => Math.max(2, Math.min(16, slot.value * 0.5)))
+
+interface Bar {
+  x: number
+  y: number
+  h: number
+  answered: number
+}
+const bars = computed<Bar[]>(() =>
+  props.points.map((p, i) => {
+    const cx = pad.left + slot.value * (i + 0.5)
+    const h = (p.answered / maxAnswered.value) * chartH.value
+    return {
+      x: cx - barW.value / 2,
+      y: pad.top + chartH.value - h,
+      h,
+      answered: p.answered
+    }
+  })
+)
+
+const linePath = computed(() => {
+  if (props.points.length === 0) return ''
+  return props.points
+    .map((p, i) => {
+      const cx = pad.left + slot.value * (i + 0.5)
+      const cy = pad.top + chartH.value - (p.accuracy / 100) * chartH.value
+      return `${i === 0 ? 'M' : 'L'}${cx.toFixed(1)},${cy.toFixed(1)}`
+    })
+    .join(' ')
+})
+
+const dots = computed(() =>
+  props.points.map((p, i) => {
+    const cx = pad.left + slot.value * (i + 0.5)
+    const cy = pad.top + chartH.value - (p.accuracy / 100) * chartH.value
+    return { cx, cy, accuracy: p.accuracy, date: p.date }
+  })
+)
+
+const gridLines = [0, 0.5, 1].map((r) => pad.top + chartH.value * (1 - r))
+
+/** x 轴日期刻度：按点数量选择间隔，避免标签重叠 */
+const xTicks = computed(() => {
+  const count = props.points.length
+  const step = count <= 7 ? 1 : count <= 14 ? 2 : Math.ceil(count / 7)
+  return props.points
+    .map((p, i) => ({ ...p, i }))
+    .filter((p) => p.i % step === 0 || p.i === count - 1)
+    .map((p) => ({
+      cx: pad.left + slot.value * (p.i + 0.5),
+      label: `${Number(p.date.slice(5, 7))}/${Number(p.date.slice(8, 10))}`
+    }))
+})
+</script>
+
+<template>
+  <div ref="container" class="trend-chart">
+    <div class="trend-chart__legend">
+      <span class="legend-item"><i class="dot dot--bar" />每日答题数</span>
+      <span class="legend-item"><i class="dot dot--line" />正确率</span>
+    </div>
+
+    <svg :width="width" :height="height" class="trend-chart__svg" role="img" aria-label="学习趋势图">
+      <template v-if="points.length">
+        <!-- 网格线 -->
+        <g v-for="(y, idx) in gridLines" :key="idx">
+          <line
+            :x1="pad.left" :y1="y" :x2="pad.left + chartW" :y2="y"
+            stroke="var(--border-subtle)" stroke-width="1"
+          />
+        </g>
+
+        <!-- 答题数柱 -->
+        <rect
+          v-for="(b, i) in bars"
+          :key="`bar-${i}`"
+          :x="b.x" :y="b.y" :width="barW" :height="Math.max(b.h, 0)"
+          rx="3"
+          fill="var(--primary)"
+          :opacity="b.answered === 0 ? 0 : 0.85"
+        >
+          <title>{{ points[i].date }} · 答题 {{ b.answered }} 题</title>
+        </rect>
+
+        <!-- 正确率折线 -->
+        <path
+          v-if="linePath"
+          :d="linePath"
+          fill="none"
+          stroke="var(--success)"
+          stroke-width="2"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+        />
+        <circle
+          v-for="(d, i) in dots"
+          :key="`dot-${i}`"
+          :cx="d.cx" :cy="d.cy" r="3"
+          fill="var(--success)"
+        >
+          <title>{{ d.date }} · 正确率 {{ d.accuracy }}%</title>
+        </circle>
+
+        <!-- x 轴标签 -->
+        <text
+          v-for="(t, i) in xTicks"
+          :key="`x-${i}`"
+          :x="t.cx" :y="height - 6"
+          text-anchor="middle"
+          font-size="10"
+          fill="var(--text-muted)"
+        >{{ t.label }}</text>
+      </template>
+    </svg>
+  </div>
+</template>
+
+<style scoped>
+.trend-chart {
+  width: 100%;
+}
+.trend-chart__legend {
+  display: flex;
+  align-items: center;
+  gap: var(--space-4);
+  margin-bottom: var(--space-2);
+}
+.legend-item {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
+}
+.dot {
+  display: inline-block;
+  width: 10px;
+  height: 10px;
+  border-radius: 3px;
+}
+.dot--bar {
+  background: var(--primary);
+}
+.dot--line {
+  width: 14px;
+  height: 3px;
+  border-radius: 2px;
+  background: var(--success);
+}
+.trend-chart__svg {
+  display: block;
+}
+</style>
diff --git a/client/src/components/dashboard/MasteryCard.vue b/client/src/components/dashboard/MasteryCard.vue
new file mode 100644
index 0000000..7b36619
--- /dev/null
+++ b/client/src/components/dashboard/MasteryCard.vue
@@ -0,0 +1,114 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import AppCard from '../base/AppCard.vue'
+import AppEmpty from '../feedback/AppEmpty.vue'
+import type { DashboardMastery } from '../../api'
+
+const props = defineProps<{ mastery: DashboardMastery['mastery'] }>()
+
+const hasData = computed(() => props.mastery.some((m) => m.answered > 0))
+
+function tone(accuracy: number, answered: number): 'success' | 'warning' | 'danger' | 'neutral' {
+  if (answered === 0) return 'neutral'
+  if (accuracy >= 70) return 'success'
+  if (accuracy >= 40) return 'warning'
+  return 'danger'
+}
+</script>
+
+<template>
+  <AppCard title="模块掌握度" icon="target">
+    <AppEmpty
+      v-if="!hasData"
+      icon="target"
+      title="暂无作答记录"
+      description="完成刷题后，这里会按最近 30 天统计各模块掌握度。"
+    />
+    <ul v-else class="mastery">
+      <li v-for="item in mastery" :key="item.module" class="mastery__row">
+        <div class="mastery__head">
+          <span class="mastery__name">{{ item.module }}</span>
+          <span class="mastery__meta">
+            <template v-if="item.answered > 0">
+              <strong class="mastery__value">{{ item.accuracy }}%</strong>
+              <span class="mastery__count">答 {{ item.answered }} 题</span>
+            </template>
+            <span v-else class="mastery__none">暂无作答</span>
+          </span>
+        </div>
+        <div class="mastery__track">
+          <span
+            class="mastery__fill"
+            :class="`mastery__fill--${tone(item.accuracy, item.answered)}`"
+            :style="{ width: `${item.answered > 0 ? item.accuracy : 0}%` }"
+          />
+        </div>
+      </li>
+    </ul>
+  </AppCard>
+</template>
+
+<style scoped>
+.mastery {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-4);
+}
+.mastery__head {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  margin-bottom: var(--space-2);
+}
+.mastery__name {
+  font-size: var(--fs-subtitle);
+  font-weight: var(--fw-card-title);
+  color: var(--text-primary);
+}
+.mastery__meta {
+  display: inline-flex;
+  align-items: baseline;
+  gap: var(--space-2);
+}
+.mastery__value {
+  font-family: var(--font-num);
+  font-size: var(--fs-card-title);
+  font-weight: var(--fw-data-num);
+  color: var(--text-primary);
+}
+.mastery__count {
+  font-size: var(--fs-label);
+  color: var(--text-muted);
+}
+.mastery__none {
+  font-size: var(--fs-label);
+  color: var(--text-muted);
+}
+.mastery__track {
+  height: 8px;
+  border-radius: var(--radius-pill);
+  background: var(--bg-soft);
+  overflow: hidden;
+}
+.mastery__fill {
+  display: block;
+  height: 100%;
+  border-radius: var(--radius-pill);
+  transition: width var(--motion-switch) var(--ease-default);
+}
+.mastery__fill--success {
+  background: var(--success);
+}
+.mastery__fill--warning {
+  background: var(--warning);
+}
+.mastery__fill--danger {
+  background: var(--danger);
+}
+.mastery__fill--neutral {
+  background: var(--border-subtle);
+}
+</style>
diff --git a/client/src/components/dashboard/MockTrendCard.vue b/client/src/components/dashboard/MockTrendCard.vue
new file mode 100644
index 0000000..57e1a6c
--- /dev/null
+++ b/client/src/components/dashboard/MockTrendCard.vue
@@ -0,0 +1,72 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import AppCard from '../base/AppCard.vue'
+import AppEmpty from '../feedback/AppEmpty.vue'
+import AppLineChart from '../charts/AppLineChart.vue'
+
+export interface MockTrendPoint {
+  date: string
+  total: number
+}
+
+const props = defineProps<{
+  trend: MockTrendPoint[]
+  targetScore: number
+}>()
+
+const points = computed(() => props.trend.map((t) => ({ date: t.date, value: t.total })))
+
+const trendLabel = computed(() => {
+  if (props.trend.length < 2) return ''
+  const first = props.trend[0].total
+  const last = props.trend[props.trend.length - 1].total
+  if (last > first) return '稳定上升'
+  if (last < first) return '略有波动'
+  return '保持平稳'
+})
+
+const hasData = computed(() => props.trend.length > 0)
+</script>
+
+<template>
+  <AppCard title="模考成绩趋势" icon="chart">
+    <template #header>
+      <div class="mock__head">
+        <span v-if="trendLabel" class="mock__tag">{{ trendLabel }}</span>
+      </div>
+    </template>
+
+    <AppEmpty
+      v-if="!hasData"
+      icon="chart"
+      title="暂无模考成绩"
+      description="在「模考分析」录入行测模考成绩后，这里会展示成绩趋势。"
+    />
+
+    <template v-else>
+      <p class="mock__sub">近 {{ points.length }} 场 · 总分 · 目标 {{ targetScore }} 分</p>
+      <AppLineChart :points="points" :target="targetScore" />
+    </template>
+  </AppCard>
+</template>
+
+<style scoped>
+.mock__head {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+}
+.mock__tag {
+  font-size: var(--fs-label);
+  font-weight: var(--fw-label-bold);
+  color: var(--success);
+  background: var(--success-soft);
+  padding: 2px var(--space-2);
+  border-radius: var(--radius-sm);
+}
+.mock__sub {
+  margin: 0 0 var(--space-3);
+  font-size: var(--fs-subtitle);
+  color: var(--text-secondary);
+}
+</style>
diff --git a/client/src/components/dashboard/StatCard.vue b/client/src/components/dashboard/StatCard.vue
new file mode 100644
index 0000000..ee1fc1d
--- /dev/null
+++ b/client/src/components/dashboard/StatCard.vue
@@ -0,0 +1,90 @@
+<script setup lang="ts">
+import AppCard from '../base/AppCard.vue'
+import AppIcon from '../base/AppIcon.vue'
+import type { IconName } from '../base/icons'
+
+withDefaults(
+  defineProps<{
+    label: string
+    value: string
+    sub?: string
+    icon: IconName
+    tone?: 'default' | 'danger' | 'success' | 'warning'
+    subTone?: 'default' | 'success' | 'danger' | 'warning'
+  }>(),
+  { sub: '', tone: 'default', subTone: 'default' }
+)
+</script>
+
+<template>
+  <AppCard class="stat">
+    <div class="stat__icon" :class="`stat__icon--${tone}`">
+      <AppIcon :name="icon" :size="18" />
+    </div>
+    <div class="stat__meta">
+      <span class="stat__label">{{ label }}</span>
+      <strong class="stat__value">{{ value }}</strong>
+      <span v-if="sub" class="stat__sub" :class="`stat__sub--${subTone}`">{{ sub }}</span>
+    </div>
+  </AppCard>
+</template>
+
+<style scoped>
+.stat {
+  display: flex;
+  align-items: flex-start;
+  gap: var(--space-3);
+}
+.stat__icon {
+  display: grid;
+  place-items: center;
+  width: 40px;
+  height: 40px;
+  flex: none;
+  border-radius: var(--radius-md);
+  background: var(--bg-soft);
+  color: var(--primary);
+}
+.stat__icon--danger {
+  background: var(--danger-soft);
+  color: var(--danger);
+}
+.stat__icon--success {
+  background: var(--success-soft);
+  color: var(--success);
+}
+.stat__icon--warning {
+  background: var(--warning-soft);
+  color: var(--warning);
+}
+.stat__meta {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+}
+.stat__label {
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
+}
+.stat__value {
+  font-family: var(--font-num);
+  font-size: 20px;
+  font-weight: 700;
+  line-height: 1.2;
+  color: var(--text-primary);
+}
+.stat__sub {
+  font-size: var(--fs-label);
+  color: var(--text-muted);
+}
+.stat__sub--success {
+  color: var(--success);
+}
+.stat__sub--danger {
+  color: var(--danger);
+}
+.stat__sub--warning {
+  color: var(--warning);
+}
+</style>
diff --git a/client/src/components/dashboard/TodayTasksCard.vue b/client/src/components/dashboard/TodayTasksCard.vue
new file mode 100644
index 0000000..31230ea
--- /dev/null
+++ b/client/src/components/dashboard/TodayTasksCard.vue
@@ -0,0 +1,122 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import AppCard from '../base/AppCard.vue'
+import AppEmpty from '../feedback/AppEmpty.vue'
+import AppIcon from '../base/AppIcon.vue'
+import type { paths } from '../../api'
+
+type TodayResponse = NonNullable<paths['/api/plans/today']['get']['responses']['200']['content']['application/json']>
+
+const props = defineProps<{ day: TodayResponse | null }>()
+
+const tasks = computed(() => props.day?.tasks ?? [])
+const done = computed(() => props.day?.done ?? 0)
+const total = computed(() => props.day?.total ?? 0)
+</script>
+
+<template>
+  <AppCard title="今日任务" icon="check">
+    <template #header>
+      <div class="tasks__head">
+        <span v-if="total > 0" class="tasks__progress">{{ done }}/{{ total }}</span>
+        <RouterLink class="tasks__more" to="/plan">查看全部</RouterLink>
+      </div>
+    </template>
+
+    <AppEmpty
+      v-if="total === 0"
+      icon="calendar"
+      title="今日暂无任务"
+      description="在「备考计划」里安排今天的复习与刷题任务。"
+    />
+
+    <ul v-else class="tasks">
+      <li v-for="task in tasks" :key="task.id" class="task" :class="{ 'task--done': task.status === 'done' }">
+        <span class="task__state">
+          <AppIcon :name="task.status === 'done' ? 'check' : 'clock'" :size="16" />
+        </span>
+        <span class="task__body">
+          <span class="task__title">{{ task.title }}</span>
+          <span class="task__sub">{{ task.target }}</span>
+        </span>
+        <span class="task__type">{{ task.type }}</span>
+      </li>
+    </ul>
+  </AppCard>
+</template>
+
+<style scoped>
+.tasks__head {
+  display: flex;
+  align-items: center;
+  gap: var(--space-3);
+}
+.tasks__progress {
+  font-family: var(--font-num);
+  font-size: var(--fs-label-bold);
+  color: var(--text-secondary);
+}
+.tasks__more {
+  font-size: var(--fs-label);
+  color: var(--primary);
+  text-decoration: none;
+}
+.tasks__more:hover {
+  text-decoration: underline;
+}
+.tasks {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-3);
+}
+.task {
+  display: flex;
+  align-items: center;
+  gap: var(--space-3);
+  padding: var(--space-3);
+  border-radius: var(--radius-md);
+  background: var(--bg-soft);
+}
+.task__state {
+  display: grid;
+  place-items: center;
+  width: 28px;
+  height: 28px;
+  flex: none;
+  border-radius: var(--radius-pill);
+  color: var(--text-muted);
+  background: var(--bg-card);
+}
+.task--done .task__state {
+  color: var(--success);
+  background: var(--success-soft);
+}
+.task__body {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+  flex: 1;
+}
+.task__title {
+  font-size: var(--fs-subtitle);
+  font-weight: var(--fw-card-title);
+  color: var(--text-primary);
+}
+.task--done .task__title {
+  color: var(--text-muted);
+  text-decoration: line-through;
+}
+.task__sub {
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
+}
+.task__type {
+  flex: none;
+  font-size: var(--fs-label);
+  color: var(--text-muted);
+}
+</style>
diff --git a/client/src/components/dashboard/WeakPointsCard.vue b/client/src/components/dashboard/WeakPointsCard.vue
new file mode 100644
index 0000000..18b73c3
--- /dev/null
+++ b/client/src/components/dashboard/WeakPointsCard.vue
@@ -0,0 +1,97 @@
+<script setup lang="ts">
+import AppCard from '../base/AppCard.vue'
+import AppEmpty from '../feedback/AppEmpty.vue'
+import AppBadge from '../base/AppBadge.vue'
+import type { DashboardWeakPoints } from '../../api'
+
+withDefaults(
+  defineProps<{
+    weakPoints: DashboardWeakPoints['weakPoints']
+    compact?: boolean
+  }>(),
+  { compact: false }
+)
+</script>
+
+<template>
+  <AppCard title="本周薄弱考点" icon="alert">
+    <template v-if="!compact" #header>
+      <span class="weak__hint">基于错因归因自动统计</span>
+    </template>
+
+    <AppEmpty
+      v-if="weakPoints.length === 0"
+      icon="alert"
+      title="暂无薄弱考点"
+      description="最近 7 天答错并归因的考点会出现在这里，继续加油！"
+    />
+
+    <ul v-else class="weak">
+      <li v-for="(w, i) in weakPoints" :key="`${w.module}-${w.point}-${i}`" class="weak__row">
+        <div class="weak__info">
+          <span class="weak__point">
+            <template v-if="compact">{{ w.point }}</template>
+            <template v-else>{{ w.module }} · {{ w.point }}</template>
+          </span>
+        </div>
+        <div class="weak__stat">
+          <strong class="weak__count">{{ w.count }}次</strong>
+        </div>
+        <div v-if="!compact && w.reasons.length" class="weak__reasons">
+          错因：{{ w.reasons.join('·') }}
+        </div>
+      </li>
+    </ul>
+  </AppCard>
+</template>
+
+<style scoped>
+.weak__hint {
+  font-size: var(--fs-label);
+  color: var(--text-muted);
+}
+.weak {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-3);
+}
+.weak__row {
+  display: grid;
+  grid-template-columns: 1fr auto;
+  align-items: center;
+  gap: var(--space-2) var(--space-3);
+  padding-bottom: var(--space-3);
+  border-bottom: 1px solid var(--border-subtle);
+}
+.weak__row:last-child {
+  padding-bottom: 0;
+  border-bottom: none;
+}
+.weak__info {
+  min-width: 0;
+}
+.weak__point {
+  font-size: var(--fs-subtitle);
+  font-weight: var(--fw-card-title);
+  color: var(--text-primary);
+}
+.weak__stat {
+  display: flex;
+  align-items: baseline;
+  flex: none;
+}
+.weak__count {
+  font-family: var(--font-num);
+  font-size: var(--fs-card-title);
+  font-weight: var(--fw-data-num);
+  color: var(--danger);
+}
+.weak__reasons {
+  grid-column: 1 / -1;
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
+}
+</style>
diff --git a/client/src/layouts/DesktopLayout.vue b/client/src/layouts/DesktopLayout.vue
index 7c225be..5fefd52 100644
--- a/client/src/layouts/DesktopLayout.vue
+++ b/client/src/layouts/DesktopLayout.vue
@@ -14,16 +14,27 @@ const route = useRoute()
         <strong>备考通</strong>
       </div>
       <nav class="nav">
-        <RouterLink
-          v-for="item in desktopNav"
-          :key="item.to"
-          :to="item.to"
-          class="nav-item"
-          :class="{ active: route.path === item.to }"
-        >
-          <AppIcon :name="item.icon" :size="18" />
-          <span>{{ item.label }}</span>
-        </RouterLink>
+        <template v-for="item in desktopNav" :key="item.to">
+          <RouterLink
+            :to="item.to"
+            class="nav-item"
+            :class="{ active: route.path === item.to }"
+          >
+            <AppIcon :name="item.icon" :size="18" />
+            <span>{{ item.label }}</span>
+          </RouterLink>
+          <RouterLink
+            v-if="item.children"
+            v-for="child in item.children"
+            :key="child.to"
+            :to="child.to"
+            class="nav-item nav-item--child"
+            :class="{ active: route.path === child.to }"
+          >
+            <span class="nav-item__dot" />
+            <span>{{ child.label }}</span>
+          </RouterLink>
+        </template>
       </nav>
     </aside>
     <main class="content"><slot /></main>
@@ -88,6 +99,19 @@ const route = useRoute()
   color: var(--on-accent);
   font-weight: var(--fw-card-title);
 }
+.nav-item--child {
+  padding-left: 36px;
+  gap: var(--space-3);
+  height: 36px;
+}
+.nav-item__dot {
+  width: 4px;
+  height: 4px;
+  flex: none;
+  border-radius: 50%;
+  background: currentColor;
+  opacity: 0.6;
+}
 .content {
   margin-left: var(--sidebar-width-desktop);
   padding: var(--padding-desktop);
diff --git a/client/src/layouts/MobileLayout.vue b/client/src/layouts/MobileLayout.vue
index 6ba82ef..ab14295 100644
--- a/client/src/layouts/MobileLayout.vue
+++ b/client/src/layouts/MobileLayout.vue
@@ -6,11 +6,13 @@ import { mobileNav } from '../router/nav'
 
 const route = useRoute()
 const title = computed(() => String(route.meta.title ?? '备考通'))
+// 首页以自己的问候语作为页头，不再重复显示顶部栏标题
+const isHome = computed(() => route.path === '/')
 </script>
 
 <template>
   <div class="layout-mobile">
-    <header class="topbar">
+    <header v-if="!isHome" class="topbar">
       <h1>{{ title }}</h1>
     </header>
     <main class="content"><slot /></main>
diff --git a/client/src/router/index.ts b/client/src/router/index.ts
index e1a4f65..4d1bb0c 100644
--- a/client/src/router/index.ts
+++ b/client/src/router/index.ts
@@ -12,6 +12,8 @@ import SettingsView from '../views/settings/SettingsView.vue'
 export const routes: RouteRecordRaw[] = [
   { path: '/', name: 'dashboard', component: DashboardView, meta: { title: '数据中枢' } },
   { path: '/practice', name: 'practice', component: PracticeView, meta: { title: '刷题中心' } },
+  { path: '/practice/wrong', name: 'practice-wrong', component: PracticeView, meta: { title: '错题本' } },
+  { path: '/practice/essay', name: 'practice-essay', component: PracticeView, meta: { title: '申论' } },
   { path: '/mock', name: 'mock', component: MockView, meta: { title: '模考分析' } },
   { path: '/plan', name: 'plan', component: PlanView, meta: { title: '备考计划' } },
   { path: '/news', name: 'news', component: NewsView, meta: { title: '要闻' } },
diff --git a/client/src/router/nav.ts b/client/src/router/nav.ts
index bdc2e0e..e7cc3b3 100644
--- a/client/src/router/nav.ts
+++ b/client/src/router/nav.ts
@@ -1,15 +1,30 @@
 import type { IconName } from '../components/base/icons'
 
+export interface NavChild {
+  label: string
+  to: string
+}
+
 export interface NavItem {
   label: string
   to: string
   icon: IconName
+  children?: NavChild[]
 }
 
-/** 桌面左侧导航（8 项，见需求文档 3.1） */
+/** 桌面左侧导航（8 项，见需求文档 3.1；「刷题中心」展开子菜单） */
 export const desktopNav: NavItem[] = [
   { label: '数据中枢', to: '/', icon: 'dashboard' },
-  { label: '刷题中心', to: '/practice', icon: 'pen' },
+  {
+    label: '刷题中心',
+    to: '/practice',
+    icon: 'pen',
+    children: [
+      { label: '刷题', to: '/practice' },
+      { label: '错题本', to: '/practice/wrong' },
+      { label: '申论', to: '/practice/essay' }
+    ]
+  },
   { label: '模考分析', to: '/mock', icon: 'chart' },
   { label: '备考计划', to: '/plan', icon: 'calendar' },
   { label: '要闻', to: '/news', icon: 'news' },
diff --git a/client/src/utils/format.ts b/client/src/utils/format.ts
index 153c526..37964f9 100644
--- a/client/src/utils/format.ts
+++ b/client/src/utils/format.ts
@@ -19,3 +19,20 @@ export function formatDateShort(iso: string): string {
   const [, m, d] = iso.split('-')
   return `${Number(m)}月${Number(d)}日`
 }
+
+/** 分钟 → 「1小时25分」/「45分」/「0分」 */
+export function formatMinutes(mins: number): string {
+  const m = Math.max(0, Math.round(mins))
+  if (m < 60) return `${m}分`
+  const h = Math.floor(m / 60)
+  const rest = m % 60
+  return rest === 0 ? `${h}小时` : `${h}小时${rest}分`
+}
+
+/** 按当天时段返回问候语（早上好 / 下午好 / 晚上好） */
+export function greetingByHour(hour = new Date().getHours()): string {
+  if (hour < 6) return '夜深了'
+  if (hour < 12) return '早上好'
+  if (hour < 18) return '下午好'
+  return '晚上好'
+}
diff --git a/client/src/views/dashboard/DashboardView.vue b/client/src/views/dashboard/DashboardView.vue
index f8b0dc9..950116b 100644
--- a/client/src/views/dashboard/DashboardView.vue
+++ b/client/src/views/dashboard/DashboardView.vue
@@ -1,101 +1,236 @@
 <script setup lang="ts">
 import { computed, onMounted } from 'vue'
-import { dashboardApi } from '../../api'
+import { dashboardApi, mockApi, plansApi } from '../../api'
 import { useRequest } from '../../composables/useRequest'
+import { useResponsive } from '../../composables/useResponsive'
 import { useProfileStore } from '../../stores/profile'
+import { formatDateShort, formatMinutes, greetingByHour } from '../../utils/format'
 import AppCard from '../../components/base/AppCard.vue'
 import AppLoading from '../../components/feedback/AppLoading.vue'
 import AppError from '../../components/feedback/AppError.vue'
 import AppEmpty from '../../components/feedback/AppEmpty.vue'
+import AppBadge from '../../components/base/AppBadge.vue'
 import AppIcon from '../../components/base/AppIcon.vue'
-import type { IconName } from '../../components/base/icons'
+import StatCard from '../../components/dashboard/StatCard.vue'
+import MockTrendCard from '../../components/dashboard/MockTrendCard.vue'
+import MasteryCard from '../../components/dashboard/MasteryCard.vue'
+import TodayTasksCard from '../../components/dashboard/TodayTasksCard.vue'
+import WeakPointsCard from '../../components/dashboard/WeakPointsCard.vue'
 
 const profile = useProfileStore()
-const { data, loading, error, refresh } = useRequest(() => dashboardApi.overview())
+const { isMobile } = useResponsive()
+
+const overview = useRequest(() => dashboardApi.overview())
+const mastery = useRequest(() => dashboardApi.mastery())
+const weakPoints = useRequest(() => dashboardApi.weakPoints())
+const today = useRequest(() => plansApi.today())
+const mock = useRequest(() => mockApi.analysis())
 
 onMounted(() => {
   if (!profile.profile) profile.fetch()
 })
 
-const isEmpty = computed(() => {
-  const d = data.value
-  return !!d && d.totalQuestions === 0 && d.totalAnswered === 0
+const d = computed(() => overview.data.value)
+const masteryItems = computed(() => mastery.data.value?.mastery ?? [])
+const weakItems = computed(() => weakPoints.data.value?.weakPoints ?? [])
+const mockRecords = computed(() => mock.data.value?.records ?? [])
+const mockTrend = computed(() => (mock.data.value?.trend ?? []).map((t) => ({ date: t.date, total: t.total })))
+const targetScore = computed(() => mock.data.value?.targetScore ?? 0)
+
+const isGlobalEmpty = computed(() => {
+  const o = d.value
+  return !!o && o.totalQuestions === 0 && o.totalAnswered === 0 && o.todayTasksTotal === 0 && mockRecords.value.length === 0
 })
 
-interface StatItem {
-  key: string
-  label: string
-  value: number
-  unit: string
-  icon: IconName
-  tone?: 'danger' | 'success'
-}
+const greeting = computed(() => `${greetingByHour()}，${profile.nickname}`)
 
-const stats = computed<StatItem[]>(() => {
-  const d = data.value
-  if (!d) return []
-  return [
-    { key: 'questions', label: '题库题量', value: d.totalQuestions, unit: '题', icon: 'book' },
-    { key: 'review', label: '待复习错题', value: d.pendingReview, unit: '题', icon: 'alert', tone: d.pendingReview > 0 ? 'danger' : undefined },
-    { key: 'tasks', label: '今日任务', value: d.todayTasksDone, unit: `/${d.todayTasksTotal}`, icon: 'check' },
-    { key: 'minutes', label: '今日学习', value: d.todayMinutes, unit: '分钟', icon: 'clock' },
-    { key: 'streak', label: '连续打卡', value: d.streakDays, unit: '天', icon: 'flame' }
-  ]
+const goalProgress = computed(() => {
+  const o = d.value
+  if (!o || o.studyDays + o.daysToExam === 0) return 0
+  return Math.min(100, Math.round((o.studyDays / (o.studyDays + o.daysToExam)) * 100))
+})
+
+const minutesDeltaText = computed(() => {
+  const delta = d.value?.minutesDelta
+  if (delta === null || delta === undefined) return ''
+  return delta >= 0 ? `+${delta}%较昨日` : `${delta}%较昨日`
+})
+
+const tasksCompletion = computed(() => {
+  const o = d.value
+  if (!o || o.todayTasksTotal === 0) return 0
+  return Math.round((o.todayTasksDone / o.todayTasksTotal) * 100)
+})
+
+const latestMock = computed(() => mockRecords.value[0] ?? null)
+const previousMock = computed(() => mockRecords.value[1] ?? null)
+const mockDelta = computed(() => {
+  if (!latestMock.value || !previousMock.value) return null
+  const delta = latestMock.value.total - previousMock.value.total
+  return delta
 })
 </script>
 
 <template>
   <div class="dashboard">
-    <header class="page-head">
-      <div>
-        <h1>数据中枢</h1>
-        <p>{{ profile.nickname }}，欢迎回来 · 今日也要稳步推进</p>
-      </div>
-    </header>
-
-    <AppLoading v-if="loading" fullscreen />
-
+    <!-- 加载 / 错误 / 全局空态 -->
+    <AppLoading v-if="overview.loading.value" fullscreen />
     <AppError
-      v-else-if="error"
+      v-else-if="overview.error.value"
       fullscreen
       title="数据加载失败"
-      :message="error"
+      :message="overview.error.value"
       retry
-      @retry="refresh"
+      @retry="overview.refresh"
     />
-
     <AppEmpty
-      v-else-if="isEmpty"
+      v-else-if="isGlobalEmpty"
       title="还没有学习数据"
       description="完成第一次刷题或导入题库后，这里会展示你的备考概览。"
     />
 
-    <div v-else-if="data" class="dashboard__body">
-      <section class="hero">
-        <div class="hero__item">
-          <span class="hero__label">学习天数</span>
-          <strong class="num">{{ data.studyDays }}<em>天</em></strong>
+    <!-- ============ 移动端首页 ============ -->
+    <div v-else-if="isMobile && d" class="home">
+      <header class="home__hello">
+        <h1>{{ greeting }}</h1>
+      </header>
+
+      <!-- hero -->
+      <section class="home-hero">
+        <div class="home-hero__item">
+          <strong class="num">{{ d.studyDays }}</strong>
+          <span class="home-hero__label">备考天数</span>
+          <span class="home-hero__sub">完成 {{ goalProgress }}%</span>
         </div>
-        <div class="hero__item">
-          <span class="hero__label">累计答题</span>
-          <strong class="num">{{ data.totalAnswered }}<em>题</em></strong>
-        </div>
-        <div class="hero__item">
-          <span class="hero__label">正确率</span>
-          <strong class="num">{{ data.accuracy }}<em>%</em></strong>
+        <div class="home-hero__divider" />
+        <div class="home-hero__item">
+          <strong class="num">{{ d.daysToExam }}</strong>
+          <span class="home-hero__label">距离国考</span>
+          <span class="home-hero__sub">{{ formatDateShort(d.examDate) }} 笔试</span>
         </div>
       </section>
 
-      <div class="stat-grid">
-        <AppCard v-for="s in stats" :key="s.key" class="stat">
-          <div class="stat__icon" :class="{ 'stat__icon--danger': s.tone === 'danger', 'stat__icon--success': s.tone === 'success' }">
-            <AppIcon :name="s.icon" :size="18" />
+      <!-- 今日学习 -->
+      <AppCard class="home-study">
+        <div class="home-study__row">
+          <span class="home-study__label">今日学习</span>
+          <strong class="home-study__value">{{ formatMinutes(d.todayMinutes) }}</strong>
+        </div>
+      </AppCard>
+
+      <!-- 三指标 -->
+      <div class="home-metrics">
+        <div class="home-metric">
+          <strong class="num">{{ d.todayAnswered }}<em>题</em></strong>
+          <span class="home-metric__label">今日刷题</span>
+        </div>
+        <div class="home-metric">
+          <strong class="num">{{ d.todayAccuracy }}<em>%</em></strong>
+          <span class="home-metric__label">今日正确率</span>
+        </div>
+        <div class="home-metric">
+          <strong class="num">{{ d.todayTasksDone }}<em>/{{ d.todayTasksTotal }}项</em></strong>
+          <span class="home-metric__label">今日任务</span>
+        </div>
+      </div>
+
+      <!-- CTA -->
+      <div class="home-cta">
+        <RouterLink class="home-cta__primary" to="/practice">开始刷题</RouterLink>
+        <RouterLink class="home-cta__secondary" to="/plan">今日计划</RouterLink>
+      </div>
+
+      <!-- 待复习错题 -->
+      <AppCard class="home-review">
+        <div class="home-review__row">
+          <div class="home-review__info">
+            <span class="home-review__icon"><AppIcon name="alert" :size="18" /></span>
+            <div class="home-review__meta">
+              <span class="home-review__label">待复习错题</span>
+              <span class="home-review__sub">今日新增 {{ d.todayNewWrong }} 道 · 待复习 {{ d.pendingReview }} 道</span>
+            </div>
           </div>
-          <div class="stat__meta">
-            <span class="stat__label">{{ s.label }}</span>
-            <strong class="num">{{ s.value }}<em>{{ s.unit }}</em></strong>
+          <RouterLink class="home-review__more" to="/practice/wrong">去复习</RouterLink>
+        </div>
+      </AppCard>
+
+      <!-- 本周薄弱考点 -->
+      <WeakPointsCard :weak-points="weakItems" />
+
+      <!-- 最近模考 -->
+      <AppCard title="最近模考" icon="chart">
+        <AppEmpty v-if="!latestMock" icon="chart" title="暂无模考成绩" description="录入行测模考成绩后展示最近一次。" />
+        <div v-else class="home-mock">
+          <div class="home-mock__head">
+            <span class="home-mock__name">{{ latestMock.name }}</span>
+            <span class="home-mock__date">{{ formatDateShort(latestMock.date) }} · 行测</span>
           </div>
-        </AppCard>
+          <div class="home-mock__score">
+            <strong class="num">{{ latestMock.total }}</strong>
+            <span class="home-mock__delta" :class="mockDelta !== null && mockDelta >= 0 ? 'is-up' : 'is-down'">
+              <template v-if="mockDelta !== null">较上次 {{ mockDelta >= 0 ? '+' : '' }}{{ mockDelta }}</template>
+            </span>
+          </div>
+          <div class="home-mock__goal">
+            距目标 {{ targetScore }} 分 · 还差 {{ Math.max(0, targetScore - latestMock.total) }} 分
+          </div>
+        </div>
+      </AppCard>
+    </div>
+
+    <!-- ============ 桌面端数据中枢 ============ -->
+    <div v-else-if="d" class="hub">
+      <header class="page-head">
+        <div>
+          <h1>数据中枢</h1>
+          <p>备考第 {{ d.studyDays }} 天：距离国考还有 {{ d.daysToExam }} 天：已连续打卡 {{ d.streakDays }} 天</p>
+        </div>
+        <AppBadge v-if="d.checkedInToday" variant="success">今日已打卡</AppBadge>
+      </header>
+
+      <!-- 指标卡 -->
+      <div class="hub-stats">
+        <StatCard
+          label="今日学习时长"
+          :value="formatMinutes(d.todayMinutes)"
+          :sub="minutesDeltaText"
+          icon="clock"
+          :sub-tone="(d.minutesDelta ?? 0) >= 0 ? 'success' : 'danger'"
+        />
+        <StatCard
+          label="今日刷题"
+          :value="`${d.todayAnswered}题`"
+          :sub="`正确率${d.todayAccuracy}%`"
+          icon="pen"
+          sub-tone="success"
+        />
+        <StatCard
+          label="待复习错题"
+          :value="`${d.pendingReview}道`"
+          :sub="`今日新增${d.todayNewWrong}道`"
+          icon="alert"
+          :tone="d.pendingReview > 0 ? 'danger' : 'default'"
+          :sub-tone="d.todayNewWrong > 0 ? 'danger' : 'default'"
+        />
+        <StatCard
+          label="今日任务"
+          :value="`${d.todayTasksDone}/${d.todayTasksTotal}`"
+          :sub="`${tasksCompletion}%完成`"
+          icon="check"
+          tone="warning"
+        />
+      </div>
+
+      <!-- 模考趋势 + 今日任务 -->
+      <div class="hub-grid">
+        <MockTrendCard :trend="mockTrend" :target-score="targetScore" />
+        <TodayTasksCard :day="today.data.value" />
+      </div>
+
+      <!-- 模块掌握度 + 薄弱考点 -->
+      <div class="hub-grid">
+        <MasteryCard :mastery="masteryItems" />
+        <WeakPointsCard :weak-points="weakItems" compact />
       </div>
     </div>
   </div>
@@ -107,7 +242,20 @@ const stats = computed<StatItem[]>(() => {
   flex-direction: column;
   gap: var(--space-5);
 }
+.num {
+  font-family: var(--font-num);
+  font-weight: 700;
+}
+
+/* ---------- 桌面 ---------- */
+.page-head {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: var(--space-4);
+}
 .page-head h1 {
+  margin: 0;
   font-size: var(--fs-h1);
   font-weight: var(--fw-h1);
   line-height: var(--lh-h1);
@@ -118,109 +266,222 @@ const stats = computed<StatItem[]>(() => {
   font-size: var(--fs-subtitle);
   color: var(--text-secondary);
 }
-.dashboard__body {
+.hub {
   display: flex;
   flex-direction: column;
   gap: var(--space-5);
 }
-.hero {
+.hub-stats {
   display: grid;
-  grid-template-columns: repeat(3, 1fr);
+  grid-template-columns: repeat(4, 1fr);
+  gap: var(--card-gap-desktop);
+}
+.hub-grid {
+  display: grid;
+  grid-template-columns: 2fr 1fr;
+  gap: var(--card-gap-desktop);
+  align-items: start;
+}
+@media (max-width: 1023px) {
+  .hub-stats {
+    grid-template-columns: repeat(2, 1fr);
+  }
+  .hub-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
+/* ---------- 移动 ---------- */
+.home {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-3);
+}
+.home__hello h1 {
+  margin: 0;
+  font-size: 22px;
+  font-weight: var(--fw-h1);
+  color: var(--text-primary);
+}
+.home-hero {
+  display: flex;
+  align-items: stretch;
   gap: var(--space-4);
   background: var(--gradient-hero-deep);
   color: var(--on-accent);
   border-radius: var(--radius-xl);
-  padding: var(--card-padding-desktop);
+  padding: var(--card-padding-mobile);
 }
-.hero__item {
+.home-hero__item {
+  flex: 1;
   display: flex;
   flex-direction: column;
-  gap: var(--space-2);
+  gap: 4px;
 }
-.hero__label {
-  font-size: var(--fs-label);
-  opacity: 0.85;
-}
-.hero__item strong {
+.home-hero__item .num {
   font-size: 30px;
-  font-weight: 700;
   line-height: 1.1;
 }
-.hero__item em {
-  font-style: normal;
-  font-size: 14px;
-  font-weight: 400;
-  margin-left: 4px;
+.home-hero__label {
+  font-size: var(--fs-label);
   opacity: 0.85;
 }
-.stat-grid {
-  display: grid;
-  grid-template-columns: repeat(5, 1fr);
-  gap: var(--card-gap-desktop);
+.home-hero__sub {
+  font-size: var(--fs-label);
+  opacity: 0.7;
 }
-.stat {
+.home-hero__divider {
+  width: 1px;
+  background: rgba(255, 255, 255, 0.2);
+}
+.home-study__row {
   display: flex;
   align-items: center;
-  gap: var(--space-3);
+  justify-content: space-between;
 }
-.stat__icon {
-  display: grid;
-  place-items: center;
-  width: 40px;
-  height: 40px;
-  flex: none;
-  border-radius: var(--radius-md);
-  background: var(--bg-soft);
-  color: var(--primary);
-}
-.stat__icon--danger {
-  background: var(--danger-soft);
-  color: var(--danger);
-}
-.stat__icon--success {
-  background: var(--success-soft);
-  color: var(--success);
-}
-.stat__meta {
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-}
-.stat__label {
-  font-size: var(--fs-label);
+.home-study__label {
+  font-size: var(--fs-subtitle);
   color: var(--text-secondary);
 }
-.stat__meta strong {
-  font-size: var(--fs-data-num);
+.home-study__value {
+  font-family: var(--font-num);
+  font-size: 22px;
   font-weight: 700;
-  line-height: var(--lh-data-num);
   color: var(--text-primary);
 }
-.stat__meta em {
+.home-metrics {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: var(--space-2);
+}
+.home-metric {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 4px;
+  padding: var(--space-3) var(--space-2);
+  background: var(--bg-card);
+  border: 1px solid var(--border-subtle);
+  border-radius: var(--radius-lg);
+}
+.home-metric .num {
+  font-size: 18px;
+  color: var(--text-primary);
+}
+.home-metric .num em {
   font-style: normal;
   font-size: var(--fs-label);
   font-weight: 400;
   color: var(--text-muted);
   margin-left: 2px;
 }
-
-@media (max-width: 1023px) {
-  .stat-grid {
-    grid-template-columns: repeat(2, 1fr);
-  }
+.home-metric__label {
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
 }
-@media (max-width: 767px) {
-  .hero {
-    grid-template-columns: 1fr;
-    gap: var(--space-4);
-    padding: var(--card-padding-mobile);
-  }
-  .hero__item strong {
-    font-size: 26px;
-  }
-  .stat-grid {
-    grid-template-columns: repeat(2, 1fr);
-    gap: var(--card-gap-mobile);
-  }
+.home-cta {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: var(--space-3);
+}
+.home-cta__primary,
+.home-cta__secondary {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  height: var(--btn-height-pill);
+  border-radius: var(--radius-pill);
+  font-size: var(--fs-button);
+  font-weight: var(--fw-button);
+  text-decoration: none;
+}
+.home-cta__primary {
+  background: var(--primary);
+  color: var(--on-accent);
+}
+.home-cta__secondary {
+  background: var(--bg-card);
+  color: var(--primary);
+  border: 1px solid var(--primary);
+}
+.home-review__row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--space-3);
+}
+.home-review__info {
+  display: flex;
+  align-items: center;
+  gap: var(--space-3);
+}
+.home-review__icon {
+  display: grid;
+  place-items: center;
+  width: 40px;
+  height: 40px;
+  flex: none;
+  border-radius: var(--radius-md);
+  background: var(--danger-soft);
+  color: var(--danger);
+}
+.home-review__meta {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.home-review__label {
+  font-size: var(--fs-subtitle);
+  font-weight: var(--fw-card-title);
+  color: var(--text-primary);
+}
+.home-review__sub {
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
+}
+.home-review__more {
+  font-size: var(--fs-label);
+  color: var(--primary);
+  text-decoration: none;
+  flex: none;
+}
+.home-mock__head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--space-3);
+}
+.home-mock__name {
+  font-size: var(--fs-subtitle);
+  font-weight: var(--fw-card-title);
+  color: var(--text-primary);
+}
+.home-mock__date {
+  font-size: var(--fs-label);
+  color: var(--text-muted);
+}
+.home-mock__score {
+  display: flex;
+  align-items: baseline;
+  gap: var(--space-3);
+  margin-top: var(--space-2);
+}
+.home-mock__score .num {
+  font-size: 30px;
+  color: var(--text-primary);
+}
+.home-mock__delta {
+  font-size: var(--fs-label);
+}
+.home-mock__delta.is-up {
+  color: var(--danger);
+}
+.home-mock__delta.is-down {
+  color: var(--success);
+}
+.home-mock__goal {
+  margin-top: var(--space-1);
+  font-size: var(--fs-label);
+  color: var(--text-secondary);
 }
 </style>
diff --git a/docs/checks/task-05.md b/docs/checks/task-05.md
new file mode 100644
index 0000000..cb211fd
--- /dev/null
+++ b/docs/checks/task-05.md
@@ -0,0 +1,90 @@
+# 任务 05 检查记录：数据中枢纵向闭环
+
+日期：2026-08-31（含对照原型图的二次校准）
+
+## 交付内容
+
+### 后端统计服务与接口
+- `server/src/services/stats.ts`（统计唯一来源）：`collectStudyDates`（当日学习行为日期集合）、`computeStreak`（连续打卡）、`dailyMinutes`（当日耗时）、`computeDaysToExam`（距离考试天数）、`computeMastery`（五大模块最近 30 天正确率）、`computeWeakPoints`（最近 7 天错题按子模块聚合 → 次数 + 错因）。
+- `server/src/handlers/dashboard.ts`：`overview` 返回备考天数/距离考试天数/考试日期/目标分/连续打卡/今日是否打卡/今日时长/较昨日百分比/今日刷题/今日正确率/今日任务/待复习错题/今日新增错题等；`trends` 补齐每日 minutes；新增 `mastery`、`weakPoints`。路由 31 → 33。
+- `server/src/schemas/api.ts`：`DashboardOverviewResponseSchema` 扩展字段、`DashboardWeakPointsResponseSchema` 改为 `{ module, point, count, reasons }`。
+
+### 演示数据
+- 题库 18 题覆盖五大模块（含行程问题/图形推理/增长率各多题）；相对「今天」生成近 14 天作答记录、5 场模考（54→67 上升趋势）、7 条错题（覆盖 4 个子模块、含错因）。
+
+### 前端数据中枢
+- 侧栏（`router/nav.ts` + `DesktopLayout.vue`）：「刷题中心」展开子菜单（刷题/错题本/申论），子项缩进；`router` 增加 `/practice/wrong`、`/practice/essay`。
+- `api/index.ts`：`dashboardApi` 增加 `mastery`/`weakPoints`。
+- 组件：`AppLineChart`（SVG 折线 + 目标参考线）、`StatCard`（指标卡）、`MockTrendCard`（模考成绩趋势 + 稳定上升标签）、`MasteryCard`（掌握度）、`WeakPointsCard`（薄弱考点，compact 切换）、`TodayTasksCard`（今日任务 + 查看全部）。
+- `DashboardView`：桌面「数据中枢」（页头标题+副标题+今日已打卡徽章 → 4 指标卡 → 模考趋势+今日任务 → 掌握度+薄弱考点）与移动「首页」（问候语 → hero 备考天数/距离国考 → 今日学习 → 三指标 → 开始刷题/今日计划 → 待复习错题 → 薄弱考点 → 最近模考）共用同一份后端数据，按 `isMobile` 条件渲染。
+- `MobileLayout`：首页隐藏顶部栏标题（以问候语作为页头）。
+
+## 对照原型图（OCR 提取 + 结构核对）
+
+使用 pymupdf + rapidocr 提取原型 PNG 文字与坐标，重建布局后逐项对齐：
+
+| 原型要素 | 实现 |
+|---|---|
+| 桌面：页头「数据中枢」+「备考第86天：距离国考还有96天：已连续打卡12天」+「今日已打卡」徽章 | ✅ 副标题/徽章/连续打卡均真实计算 |
+| 桌面：4 指标卡（今日学习时长/今日刷题/待复习错题/今日任务，含子文案与语义色） | ✅ StatCard |
+| 桌面：模考成绩趋势（折线+目标线+稳定上升标签+近N场） | ✅ MockTrendCard + AppLineChart |
+| 桌面：今日任务（查看全部+列表） | ✅ TodayTasksCard |
+| 桌面：模块掌握度（5 模块进度+百分比） | ✅ MasteryCard |
+| 桌面：本周薄弱考点（子模块+次数） | ✅ WeakPointsCard(compact) |
+| 桌面侧栏：刷题中心展开刷题/错题本/申论 | ✅ 子菜单 |
+| 移动：问候语 + hero(备考天数/距离国考) + 今日学习 + 三指标 + 开始刷题/今日计划 + 待复习错题 + 薄弱考点(含错因) + 最近模考 | ✅ 全部落地 |
+
+## 接口实测（curl）
+
+| 接口 | 结果 |
+|---|---|
+| `GET /api/dashboard/overview` | `studyDays 92 / daysToExam 91 / examDate 2026-11-30 / target 72 / streak 6 / checkedInToday true / todayMinutes 25 / minutesDelta 39 / todayAnswered 8 / todayAccuracy 63 / tasks 1/3 / pendingReview 7 / todayNewWrong 2` |
+| `GET /api/dashboard/mastery` | 言语 92% / 数量 36% / 判断 90% / 资料 22% / 常识 89% |
+| `GET /api/dashboard/weak-points` | 行程问题(2·公式记忆不牢/审题不清)、图形推理(2)、增长率计算(2)、逻辑判断(1) |
+| `GET /api/mock-exams/analysis` | records 67/64/61/58/54，trend 54→67，target 72 |
+
+## 浏览器检查（agent-browser）
+
+| 场景 | 结果 |
+|---|---|
+| 桌面 1440 | 侧栏子菜单、页头徽章、4 指标卡、模考趋势折线、今日任务、掌握度、薄弱考点均渲染 |
+| 移动 390 | 问候语、hero、今日学习、三指标、CTA、待复习、薄弱考点、最近模考、TabBar；`scrollWidth 380 ≤ 390` 无溢出 |
+| 空状态 | 清空数据 → 「还没有学习数据」；恢复后正常 |
+| 命令 | `server tsc`、`client vue-tsc`、`vite build` 均通过 |
+
+截图：`deliverables/checks/task-05-desktop.png`、`task-05-mobile.png`。
+
+## 完成标准核对
+
+- ✅ 有演示数据时指标、图表、任务、掌握度、薄弱考点全部可见。
+- ✅ 清空数据显示合理空状态。
+- ✅ 刷新后结果一致（数据均来自后端 JSON）。
+- ✅ PC 数据看板与 Mobile 首页共用同一份后端数据。
+- ✅ 页面布局与原型图结构对齐（含「模考成绩趋势」而非学习趋势）。
+
+## 当前结论
+
+任务 05 完成并按原型图二次校准：数据中枢桌面版与移动首页的结构、板块、字段均对照原型重建，统计计算真实接入后端数据。
+
+# 任务 05 二次调整（2026-08-31）
+
+## 完成了什么
+
+依据原型图与《开发计划》完成任务 05「数据中枢纵向闭环」，打通「后端统计计算 → 接口 → 前端页面」完整链路，并对照原型图二次校准了 PC 数据看板与 Mobile 首页的结构。
+
+- **后端**：新增统计服务 `services/stats.ts`（连续打卡 / 每日时长 / 距离考试 / 模块掌握度 / 薄弱考点）；扩展 `overview` 返回备考天数、距离考试、连续打卡、今日四项指标等；新增 `GET /api/dashboard/mastery`、`GET /api/dashboard/weak-points`（路由 31 → 33）。
+- **演示数据**：题库 18 题覆盖五大模块，作答记录 51 条、模考 5 场（上升趋势）、错题 7 条（含错因），日期相对当天生成。
+- **前端**：数据中枢页重做为五板块——页头（标题+副标题+打卡徽章）、4 指标卡、模考成绩趋势、今日任务、模块掌握度、本周薄弱考点；移动首页为问候 + hero + 今日学习 + 三指标 + CTA + 待复习 + 薄弱考点 + 最近模考；侧栏加「刷题中心」子菜单。
+
+## 关键决策
+
+- 「趋势」按原型对应「模考成绩趋势」（来自模考数据），非学习趋势。
+- 薄弱考点按原型改为「基于错题错因归因」聚合（最近 7 天，次数 + 错因），与「模块掌握度」（正确率）分离。
+- 统计计算集中在后端 `services/stats.ts`，前端仅做展示型派生（如完成百分比、较上次差值）。
+- 图表用自绘 SVG（`AppLineChart`），不引入 ECharts，延续「不引重依赖」约定。
+
+## 验证结论
+
+- 有数据时指标、图表、任务、掌握度、薄弱考点全部可见；清空数据显示空状态；刷新一致。
+- 桌面 1440 / 移动 390 双端实测渲染正常，移动无横向溢出；typecheck / build 通过。
+- 结构已逐项对照原型 OCR 结果对齐。
\ No newline at end of file
diff --git a/server/data/mock-exams.json b/server/data/mock-exams.json
index fe51488..3c350eb 100644
--- a/server/data/mock-exams.json
+++ b/server/data/mock-exams.json
@@ -1 +1,77 @@
-[]
+[
+  {
+    "id": "mock-demo-1",
+    "name": "行测全真模考（一）",
+    "date": "2026-08-01",
+    "total": 54,
+    "modules": {
+      "言语理解": 12,
+      "数量关系": 9,
+      "判断推理": 12,
+      "资料分析": 10,
+      "常识判断": 11
+    },
+    "note": "演示模考数据",
+    "createdAt": "2026-08-01T20:00:00+08:00"
+  },
+  {
+    "id": "mock-demo-2",
+    "name": "行测全真模考（二）",
+    "date": "2026-08-09",
+    "total": 58,
+    "modules": {
+      "言语理解": 13,
+      "数量关系": 10,
+      "判断推理": 12,
+      "资料分析": 11,
+      "常识判断": 12
+    },
+    "note": "演示模考数据",
+    "createdAt": "2026-08-09T20:00:00+08:00"
+  },
+  {
+    "id": "mock-demo-3",
+    "name": "行测全真模考（三）",
+    "date": "2026-08-16",
+    "total": 61,
+    "modules": {
+      "言语理解": 13,
+      "数量关系": 11,
+      "判断推理": 13,
+      "资料分析": 12,
+      "常识判断": 12
+    },
+    "note": "演示模考数据",
+    "createdAt": "2026-08-16T20:00:00+08:00"
+  },
+  {
+    "id": "mock-demo-4",
+    "name": "行测全真模考（四）",
+    "date": "2026-08-23",
+    "total": 64,
+    "modules": {
+      "言语理解": 14,
+      "数量关系": 12,
+      "判断推理": 13,
+      "资料分析": 12,
+      "常识判断": 13
+    },
+    "note": "演示模考数据",
+    "createdAt": "2026-08-23T20:00:00+08:00"
+  },
+  {
+    "id": "mock-demo-5",
+    "name": "行测全真模考（五）",
+    "date": "2026-08-30",
+    "total": 67,
+    "modules": {
+      "言语理解": 14,
+      "数量关系": 12,
+      "判断推理": 14,
+      "资料分析": 13,
+      "常识判断": 14
+    },
+    "note": "演示模考数据",
+    "createdAt": "2026-08-30T20:00:00+08:00"
+  }
+]
diff --git a/server/data/practice-records.json b/server/data/practice-records.json
index fe51488..855dd54 100644
--- a/server/data/practice-records.json
+++ b/server/data/practice-records.json
@@ -1 +1,410 @@
-[]
+[
+  {
+    "questionId": "demo-q-001",
+    "sessionId": "demo-session-0-0",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 120,
+    "answeredAt": "2026-08-31T08:00:00+08:00"
+  },
+  {
+    "questionId": "demo-q-002",
+    "sessionId": "demo-session-0-1",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 150,
+    "answeredAt": "2026-08-31T09:07:00+08:00"
+  },
+  {
+    "questionId": "demo-q-004",
+    "sessionId": "demo-session-0-2",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 300,
+    "answeredAt": "2026-08-31T10:14:00+08:00"
+  },
+  {
+    "questionId": "demo-q-007",
+    "sessionId": "demo-session-0-3",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 90,
+    "answeredAt": "2026-08-31T11:21:00+08:00"
+  },
+  {
+    "questionId": "demo-q-010",
+    "sessionId": "demo-session-0-4",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 360,
+    "answeredAt": "2026-08-31T12:28:00+08:00"
+  },
+  {
+    "questionId": "demo-q-012",
+    "sessionId": "demo-session-0-5",
+    "userAnswer": "C",
+    "correct": true,
+    "secondsUsed": 60,
+    "answeredAt": "2026-08-31T13:35:00+08:00"
+  },
+  {
+    "questionId": "demo-q-005",
+    "sessionId": "demo-session-0-6",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 180,
+    "answeredAt": "2026-08-31T14:42:00+08:00"
+  },
+  {
+    "questionId": "demo-q-008",
+    "sessionId": "demo-session-0-7",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 240,
+    "answeredAt": "2026-08-31T15:49:00+08:00"
+  },
+  {
+    "questionId": "demo-q-003",
+    "sessionId": "demo-session-1-8",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 180,
+    "answeredAt": "2026-08-30T16:56:00+08:00"
+  },
+  {
+    "questionId": "demo-q-004",
+    "sessionId": "demo-session-1-9",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 240,
+    "answeredAt": "2026-08-30T17:03:00+08:00"
+  },
+  {
+    "questionId": "demo-q-009",
+    "sessionId": "demo-session-1-10",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 60,
+    "answeredAt": "2026-08-30T08:10:00+08:00"
+  },
+  {
+    "questionId": "demo-q-011",
+    "sessionId": "demo-session-1-11",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 300,
+    "answeredAt": "2026-08-30T09:17:00+08:00"
+  },
+  {
+    "questionId": "demo-q-013",
+    "sessionId": "demo-session-1-12",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 50,
+    "answeredAt": "2026-08-30T10:24:00+08:00"
+  },
+  {
+    "questionId": "demo-q-006",
+    "sessionId": "demo-session-1-13",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 260,
+    "answeredAt": "2026-08-30T11:31:00+08:00"
+  },
+  {
+    "questionId": "demo-q-001",
+    "sessionId": "demo-session-2-14",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 130,
+    "answeredAt": "2026-08-29T12:38:00+08:00"
+  },
+  {
+    "questionId": "demo-q-007",
+    "sessionId": "demo-session-2-15",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 95,
+    "answeredAt": "2026-08-29T13:45:00+08:00"
+  },
+  {
+    "questionId": "demo-q-010",
+    "sessionId": "demo-session-2-16",
+    "userAnswer": "C",
+    "correct": true,
+    "secondsUsed": 320,
+    "answeredAt": "2026-08-29T14:52:00+08:00"
+  },
+  {
+    "questionId": "demo-q-014",
+    "sessionId": "demo-session-2-17",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 200,
+    "answeredAt": "2026-08-29T15:59:00+08:00"
+  },
+  {
+    "questionId": "demo-q-012",
+    "sessionId": "demo-session-2-18",
+    "userAnswer": "C",
+    "correct": true,
+    "secondsUsed": 70,
+    "answeredAt": "2026-08-29T16:06:00+08:00"
+  },
+  {
+    "questionId": "demo-q-002",
+    "sessionId": "demo-session-3-19",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 140,
+    "answeredAt": "2026-08-28T17:13:00+08:00"
+  },
+  {
+    "questionId": "demo-q-005",
+    "sessionId": "demo-session-3-20",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 190,
+    "answeredAt": "2026-08-28T08:20:00+08:00"
+  },
+  {
+    "questionId": "demo-q-008",
+    "sessionId": "demo-session-3-21",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 200,
+    "answeredAt": "2026-08-28T09:27:00+08:00"
+  },
+  {
+    "questionId": "demo-q-010",
+    "sessionId": "demo-session-3-22",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 310,
+    "answeredAt": "2026-08-28T10:34:00+08:00"
+  },
+  {
+    "questionId": "demo-q-003",
+    "sessionId": "demo-session-3-23",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 170,
+    "answeredAt": "2026-08-28T11:41:00+08:00"
+  },
+  {
+    "questionId": "demo-q-015",
+    "sessionId": "demo-session-3-24",
+    "userAnswer": "B",
+    "correct": false,
+    "secondsUsed": 280,
+    "answeredAt": "2026-08-28T12:48:00+08:00"
+  },
+  {
+    "questionId": "demo-q-013",
+    "sessionId": "demo-session-3-25",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 55,
+    "answeredAt": "2026-08-28T13:55:00+08:00"
+  },
+  {
+    "questionId": "demo-q-004",
+    "sessionId": "demo-session-4-26",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 260,
+    "answeredAt": "2026-08-27T14:02:00+08:00"
+  },
+  {
+    "questionId": "demo-q-009",
+    "sessionId": "demo-session-4-27",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 65,
+    "answeredAt": "2026-08-27T15:09:00+08:00"
+  },
+  {
+    "questionId": "demo-q-012",
+    "sessionId": "demo-session-4-28",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 75,
+    "answeredAt": "2026-08-27T16:16:00+08:00"
+  },
+  {
+    "questionId": "demo-q-001",
+    "sessionId": "demo-session-4-29",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 125,
+    "answeredAt": "2026-08-27T17:23:00+08:00"
+  },
+  {
+    "questionId": "demo-q-007",
+    "sessionId": "demo-session-5-30",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 100,
+    "answeredAt": "2026-08-26T08:30:00+08:00"
+  },
+  {
+    "questionId": "demo-q-011",
+    "sessionId": "demo-session-5-31",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 320,
+    "answeredAt": "2026-08-26T09:37:00+08:00"
+  },
+  {
+    "questionId": "demo-q-002",
+    "sessionId": "demo-session-5-32",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 155,
+    "answeredAt": "2026-08-26T10:44:00+08:00"
+  },
+  {
+    "questionId": "demo-q-010",
+    "sessionId": "demo-session-5-33",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 300,
+    "answeredAt": "2026-08-26T11:51:00+08:00"
+  },
+  {
+    "questionId": "demo-q-013",
+    "sessionId": "demo-session-5-34",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 60,
+    "answeredAt": "2026-08-26T12:58:00+08:00"
+  },
+  {
+    "questionId": "demo-q-006",
+    "sessionId": "demo-session-5-35",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 250,
+    "answeredAt": "2026-08-26T13:05:00+08:00"
+  },
+  {
+    "questionId": "demo-q-001",
+    "sessionId": "demo-session-7-36",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 135,
+    "answeredAt": "2026-08-24T14:12:00+08:00"
+  },
+  {
+    "questionId": "demo-q-004",
+    "sessionId": "demo-session-7-37",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 270,
+    "answeredAt": "2026-08-24T15:19:00+08:00"
+  },
+  {
+    "questionId": "demo-q-009",
+    "sessionId": "demo-session-7-38",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 60,
+    "answeredAt": "2026-08-24T16:26:00+08:00"
+  },
+  {
+    "questionId": "demo-q-008",
+    "sessionId": "demo-session-9-39",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 210,
+    "answeredAt": "2026-08-22T17:33:00+08:00"
+  },
+  {
+    "questionId": "demo-q-010",
+    "sessionId": "demo-session-9-40",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 330,
+    "answeredAt": "2026-08-22T08:40:00+08:00"
+  },
+  {
+    "questionId": "demo-q-012",
+    "sessionId": "demo-session-9-41",
+    "userAnswer": "C",
+    "correct": true,
+    "secondsUsed": 70,
+    "answeredAt": "2026-08-22T09:47:00+08:00"
+  },
+  {
+    "questionId": "demo-q-002",
+    "sessionId": "demo-session-9-42",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 145,
+    "answeredAt": "2026-08-22T10:54:00+08:00"
+  },
+  {
+    "questionId": "demo-q-004",
+    "sessionId": "demo-session-11-43",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 280,
+    "answeredAt": "2026-08-20T11:01:00+08:00"
+  },
+  {
+    "questionId": "demo-q-013",
+    "sessionId": "demo-session-11-44",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 55,
+    "answeredAt": "2026-08-20T12:08:00+08:00"
+  },
+  {
+    "questionId": "demo-q-005",
+    "sessionId": "demo-session-11-45",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 175,
+    "answeredAt": "2026-08-20T13:15:00+08:00"
+  },
+  {
+    "questionId": "demo-q-003",
+    "sessionId": "demo-session-13-46",
+    "userAnswer": "A",
+    "correct": true,
+    "secondsUsed": 185,
+    "answeredAt": "2026-08-18T14:22:00+08:00"
+  },
+  {
+    "questionId": "demo-q-010",
+    "sessionId": "demo-session-13-47",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 340,
+    "answeredAt": "2026-08-18T15:29:00+08:00"
+  },
+  {
+    "questionId": "demo-q-007",
+    "sessionId": "demo-session-13-48",
+    "userAnswer": "B",
+    "correct": true,
+    "secondsUsed": 110,
+    "answeredAt": "2026-08-18T16:36:00+08:00"
+  },
+  {
+    "questionId": "demo-q-012",
+    "sessionId": "demo-session-13-49",
+    "userAnswer": "C",
+    "correct": true,
+    "secondsUsed": 80,
+    "answeredAt": "2026-08-18T17:43:00+08:00"
+  },
+  {
+    "questionId": "demo-q-004",
+    "sessionId": "demo-session-13-50",
+    "userAnswer": "A",
+    "correct": false,
+    "secondsUsed": 250,
+    "answeredAt": "2026-08-18T08:50:00+08:00"
+  }
+]
diff --git a/server/data/questions.json b/server/data/questions.json
index 081de37..bc69f33 100644
--- a/server/data/questions.json
+++ b/server/data/questions.json
@@ -2,39 +2,6 @@
   {
     "id": "demo-q-001",
     "type": "行测",
-    "module": "数量关系",
-    "subModule": "行程问题",
-    "difficulty": "中等",
-    "stem": "甲、乙两车分别从 A、B 两地同时出发相向而行，甲车速度为 60km/h，乙车速度为 40km/h，两车相遇后甲车又行驶 2 小时到达 B 地，问 A、B 两地相距多少千米？",
-    "options": [
-      {
-        "key": "A",
-        "text": "240 千米"
-      },
-      {
-        "key": "B",
-        "text": "260 千米"
-      },
-      {
-        "key": "C",
-        "text": "280 千米"
-      },
-      {
-        "key": "D",
-        "text": "300 千米"
-      }
-    ],
-    "answer": "C",
-    "analysis": "相遇后甲车行驶 60×2=120 千米，此路程等于乙车相遇前行驶的路程。由速度比可得相遇时间为 3 小时，两地距离为 100×3=300 千米。",
-    "tags": [
-      "相遇问题"
-    ],
-    "source": "内置演示题库",
-    "createdAt": "2026-08-27T00:00:00+08:00"
-  },
-  {
-    "id": "demo-q-002",
-    "type": "行测",
     "module": "言语理解",
     "subModule": "逻辑填空",
     "difficulty": "简单",
@@ -65,9 +32,174 @@
     "source": "内置演示题库",
     "createdAt": "2026-08-27T00:00:00+08:00"
   },
+  {
+    "id": "demo-q-002",
+    "type": "行测",
+    "module": "言语理解",
+    "subModule": "片段阅读",
+    "difficulty": "中等",
+    "stem": "城市更新不是简单的“拆旧建新”，而是要在保留文脉的基础上注入现代功能。这段文字意在强调____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "城市更新应当完全保留旧建筑"
+      },
+      {
+        "key": "B",
+        "text": "城市更新要兼顾文脉传承与现代功能"
+      },
+      {
+        "key": "C",
+        "text": "现代功能比文脉传承更重要"
+      },
+      {
+        "key": "D",
+        "text": "拆旧建新是最高效的方式"
+      }
+    ],
+    "answer": "B",
+    "analysis": "文段用“不是……而是……”强调城市更新的真正内涵是兼顾传承与功能。",
+    "tags": [
+      "主旨概括"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
   {
     "id": "demo-q-003",
     "type": "行测",
+    "module": "言语理解",
+    "subModule": "语句排序",
+    "difficulty": "中等",
+    "stem": "①这要求我们既要有战略定力 ②更要蹄疾步稳、久久为功 ③改革进入深水区 ④把顶层设计与基层探索结合起来。将以上句子组成语意连贯的语段，排序正确的是____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "③①④②"
+      },
+      {
+        "key": "B",
+        "text": "①③②④"
+      },
+      {
+        "key": "C",
+        "text": "③④②①"
+      },
+      {
+        "key": "D",
+        "text": "④③①②"
+      }
+    ],
+    "answer": "A",
+    "analysis": "③提出背景“改革进入深水区”，①承接“要求有战略定力”，④补充方法，②收束强调“更要”。",
+    "tags": [
+      "语句衔接"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-004",
+    "type": "行测",
+    "module": "数量关系",
+    "subModule": "行程问题",
+    "difficulty": "中等",
+    "stem": "甲、乙两车分别从 A、B 两地同时出发相向而行，甲车速度 60km/h，乙车速度 40km/h，相遇后甲车又行驶 2 小时到达 B 地，问 A、B 两地相距多少千米？",
+    "options": [
+      {
+        "key": "A",
+        "text": "240 千米"
+      },
+      {
+        "key": "B",
+        "text": "260 千米"
+      },
+      {
+        "key": "C",
+        "text": "300 千米"
+      },
+      {
+        "key": "D",
+        "text": "280 千米"
+      }
+    ],
+    "answer": "C",
+    "analysis": "相遇后甲车行驶 60×2=120 千米，等于乙车相遇前行驶路程；由速度比可得相遇时间 3 小时，两地相距 100×3=300 千米。",
+    "tags": [
+      "相遇问题"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-005",
+    "type": "行测",
+    "module": "数量关系",
+    "subModule": "工程问题",
+    "difficulty": "中等",
+    "stem": "一项工程，甲单独做 12 天完成，乙单独做 18 天完成，两人合作 4 天后，剩余工程由乙单独完成，还需多少天？",
+    "options": [
+      {
+        "key": "A",
+        "text": "6 天"
+      },
+      {
+        "key": "B",
+        "text": "8 天"
+      },
+      {
+        "key": "C",
+        "text": "10 天"
+      },
+      {
+        "key": "D",
+        "text": "12 天"
+      }
+    ],
+    "answer": "B",
+    "analysis": "合作 4 天完成 4×(1/12+1/18)=5/9，剩余 4/9，乙单独需 (4/9)÷(1/18)=8 天。",
+    "tags": [
+      "合作工程"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-006",
+    "type": "行测",
+    "module": "数量关系",
+    "subModule": "利润问题",
+    "difficulty": "困难",
+    "stem": "某商品按进价提高 50% 标价，再打八折出售，结果每件盈利 40 元，则该商品的进价是多少元？",
+    "options": [
+      {
+        "key": "A",
+        "text": "150 元"
+      },
+      {
+        "key": "B",
+        "text": "200 元"
+      },
+      {
+        "key": "C",
+        "text": "250 元"
+      },
+      {
+        "key": "D",
+        "text": "300 元"
+      }
+    ],
+    "answer": "B",
+    "analysis": "设进价 x，售价为 1.5x×0.8=1.2x，盈利 0.2x=40，解得 x=200 元。",
+    "tags": [
+      "折扣问题"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-007",
+    "type": "行测",
     "module": "判断推理",
     "subModule": "图形推理",
     "difficulty": "中等",
@@ -87,7 +219,7 @@
       },
       {
         "key": "D",
-        "text": "翻转"
+        "text": "上下翻转"
       }
     ],
     "answer": "B",
@@ -97,5 +229,368 @@
     ],
     "source": "内置演示题库",
     "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-008",
+    "type": "行测",
+    "module": "判断推理",
+    "subModule": "逻辑判断",
+    "difficulty": "中等",
+    "stem": "只有坚持问题导向，才能找准改革的突破口。由此可以推出____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "坚持问题导向就能找准突破口"
+      },
+      {
+        "key": "B",
+        "text": "找准突破口必须坚持问题导向"
+      },
+      {
+        "key": "C",
+        "text": "不坚持问题导向也能找准突破口"
+      },
+      {
+        "key": "D",
+        "text": "找准突破口与问题导向无关"
+      }
+    ],
+    "answer": "B",
+    "analysis": "“只有 A 才 B”为必要条件，等价于“B 推出 A”，故找准突破口必然坚持问题导向。",
+    "tags": [
+      "必要条件"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-009",
+    "type": "行测",
+    "module": "判断推理",
+    "subModule": "类比推理",
+    "difficulty": "简单",
+    "stem": "教师：教书育人 与 ____ 最相似。",
+    "options": [
+      {
+        "key": "A",
+        "text": "医生：救死扶伤"
+      },
+      {
+        "key": "B",
+        "text": "医生：医院"
+      },
+      {
+        "key": "C",
+        "text": "教室：学生"
+      },
+      {
+        "key": "D",
+        "text": "讲台：粉笔"
+      }
+    ],
+    "answer": "A",
+    "analysis": "题干为“职业：职责”关系，医生与救死扶伤同为职业与职责的关系。",
+    "tags": [
+      "对应关系"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-010",
+    "type": "行测",
+    "module": "资料分析",
+    "subModule": "增长率计算",
+    "difficulty": "中等",
+    "stem": "某地去年 GDP 为 5000 亿元，今年为 5750 亿元，则今年的同比增长率为____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "12%"
+      },
+      {
+        "key": "B",
+        "text": "13%"
+      },
+      {
+        "key": "C",
+        "text": "15%"
+      },
+      {
+        "key": "D",
+        "text": "16%"
+      }
+    ],
+    "answer": "C",
+    "analysis": "增长率=(5750-5000)÷5000×100%=15%。",
+    "tags": [
+      "增长率"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-011",
+    "type": "行测",
+    "module": "资料分析",
+    "subModule": "基期量计算",
+    "difficulty": "困难",
+    "stem": "某地区今年粮食产量为 1260 万吨，同比增长 5%，则去年粮食产量约为____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "1180 万吨"
+      },
+      {
+        "key": "B",
+        "text": "1200 万吨"
+      },
+      {
+        "key": "C",
+        "text": "1210 万吨"
+      },
+      {
+        "key": "D",
+        "text": "1230 万吨"
+      }
+    ],
+    "answer": "B",
+    "analysis": "基期量=1260÷(1+5%)=1260÷1.05=1200 万吨。",
+    "tags": [
+      "基期量"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-012",
+    "type": "行测",
+    "module": "常识判断",
+    "subModule": "法律常识",
+    "difficulty": "中等",
+    "stem": "根据《中华人民共和国民法典》，自然人的民事权利能力始于____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "年满 18 周岁"
+      },
+      {
+        "key": "B",
+        "text": "年满 16 周岁"
+      },
+      {
+        "key": "C",
+        "text": "出生"
+      },
+      {
+        "key": "D",
+        "text": "登记户口"
+      }
+    ],
+    "answer": "C",
+    "analysis": "民事权利能力从出生时起到死亡时止，自然人一律平等享有。",
+    "tags": [
+      "民法"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-013",
+    "type": "行测",
+    "module": "常识判断",
+    "subModule": "时政热点",
+    "difficulty": "简单",
+    "stem": "新发展理念的核心内容包括创新、协调、绿色、开放、____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "共享"
+      },
+      {
+        "key": "B",
+        "text": "公平"
+      },
+      {
+        "key": "C",
+        "text": "效率"
+      },
+      {
+        "key": "D",
+        "text": "安全"
+      }
+    ],
+    "answer": "A",
+    "analysis": "新发展理念即创新、协调、绿色、开放、共享五大发展理念。",
+    "tags": [
+      "新发展理念"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-014",
+    "type": "行测",
+    "module": "言语理解",
+    "subModule": "逻辑填空",
+    "difficulty": "困难",
+    "stem": "面对复杂局面，既要保持____的战略定力，也要有____的应变能力，二者不可偏废。",
+    "options": [
+      {
+        "key": "A",
+        "text": "临危不乱 见微知著"
+      },
+      {
+        "key": "B",
+        "text": "一成不变 随机应变"
+      },
+      {
+        "key": "C",
+        "text": "从容不迫 游刃有余"
+      },
+      {
+        "key": "D",
+        "text": "处变不惊 灵活机动"
+      }
+    ],
+    "answer": "D",
+    "analysis": "“处变不惊”对应战略定力，“灵活机动”对应应变能力，语义搭配最恰当。",
+    "tags": [
+      "成语辨析"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-015",
+    "type": "行测",
+    "module": "资料分析",
+    "subModule": "增长率计算",
+    "difficulty": "中等",
+    "stem": "某企业一季度营收为 320 万元，二季度为 400 万元，则二季度环比增长率约为____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "25%"
+      },
+      {
+        "key": "B",
+        "text": "28%"
+      },
+      {
+        "key": "C",
+        "text": "30%"
+      },
+      {
+        "key": "D",
+        "text": "32%"
+      }
+    ],
+    "answer": "A",
+    "analysis": "环比增长率=(400-320)÷320×100%=25%。",
+    "tags": [
+      "环比增长"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-016",
+    "type": "行测",
+    "module": "数量关系",
+    "subModule": "行程问题",
+    "difficulty": "困难",
+    "stem": "一艘船顺水航行 40 千米用 2 小时，逆水航行 24 千米用 3 小时，则水流速度是多少？",
+    "options": [
+      {
+        "key": "A",
+        "text": "3 km/h"
+      },
+      {
+        "key": "B",
+        "text": "4 km/h"
+      },
+      {
+        "key": "C",
+        "text": "5 km/h"
+      },
+      {
+        "key": "D",
+        "text": "6 km/h"
+      }
+    ],
+    "answer": "D",
+    "analysis": "顺水速度 20 km/h，逆水速度 8 km/h，水流速度=(20-8)÷2=6 km/h。",
+    "tags": [
+      "流水行船"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-017",
+    "type": "行测",
+    "module": "判断推理",
+    "subModule": "图形推理",
+    "difficulty": "中等",
+    "stem": "下列图形中，阴影部分的移动规律是每次顺时针移动一格，则第四个图形阴影应位于____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "左上角"
+      },
+      {
+        "key": "B",
+        "text": "右上角"
+      },
+      {
+        "key": "C",
+        "text": "右下角"
+      },
+      {
+        "key": "D",
+        "text": "左下角"
+      }
+    ],
+    "answer": "C",
+    "analysis": "阴影按顺时针方向每次移动一格，第四个图形位于右下角。",
+    "tags": [
+      "位置变化"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
+  },
+  {
+    "id": "demo-q-018",
+    "type": "行测",
+    "module": "资料分析",
+    "subModule": "增长率计算",
+    "difficulty": "中等",
+    "stem": "某市今年居民人均可支配收入为 48000 元，同比增长 8%，则去年约为____。",
+    "options": [
+      {
+        "key": "A",
+        "text": "44000 元"
+      },
+      {
+        "key": "B",
+        "text": "44444 元"
+      },
+      {
+        "key": "C",
+        "text": "45000 元"
+      },
+      {
+        "key": "D",
+        "text": "46000 元"
+      }
+    ],
+    "answer": "B",
+    "analysis": "基期量=48000÷(1+8%)≈44444 元。",
+    "tags": [
+      "基期量"
+    ],
+    "source": "内置演示题库",
+    "createdAt": "2026-08-27T00:00:00+08:00"
   }
 ]
diff --git a/server/data/study-plans.json b/server/data/study-plans.json
index a61c24c..feb5f42 100644
--- a/server/data/study-plans.json
+++ b/server/data/study-plans.json
@@ -1,7 +1,7 @@
 [
   {
     "id": "plan-demo-001",
-    "date": "2026-08-27",
+    "date": "2026-08-31",
     "title": "言语理解专项",
     "type": "刷题",
     "target": "完成 20 题",
@@ -9,18 +9,34 @@
   },
   {
     "id": "plan-demo-002",
-    "date": "2026-08-27",
+    "date": "2026-08-31",
+    "title": "资料分析专项",
+    "type": "刷题",
+    "target": "完成 15 题",
+    "status": "pending"
+  },
+  {
+    "id": "plan-demo-003",
+    "date": "2026-08-31",
+    "title": "错题复盘",
+    "type": "复习",
+    "target": "复习 8 道",
+    "status": "pending"
+  },
+  {
+    "id": "plan-demo-004",
+    "date": "2026-08-30",
     "title": "数量关系专项",
     "type": "刷题",
     "target": "完成 15 题",
     "status": "done"
   },
   {
-    "id": "plan-demo-003",
-    "date": "2026-08-27",
-    "title": "错题复盘",
-    "type": "复习",
-    "target": "复习 8 道",
-    "status": "pending"
+    "id": "plan-demo-005",
+    "date": "2026-08-30",
+    "title": "常识积累",
+    "type": "阅读",
+    "target": "阅读 30 分钟",
+    "status": "done"
   }
 ]
diff --git a/server/data/wrong-questions.json b/server/data/wrong-questions.json
index fe51488..f0e72cc 100644
--- a/server/data/wrong-questions.json
+++ b/server/data/wrong-questions.json
@@ -1 +1,65 @@
-[]
+[
+  {
+    "id": "wrong-demo-001",
+    "questionId": "demo-q-004",
+    "wrongReason": "公式记忆不牢",
+    "status": "pending",
+    "reviewCount": 0,
+    "nextReviewAt": "2026-08-31",
+    "updatedAt": "2026-08-31T09:00:00+08:00"
+  },
+  {
+    "id": "wrong-demo-002",
+    "questionId": "demo-q-016",
+    "wrongReason": "审题不清",
+    "status": "pending",
+    "reviewCount": 0,
+    "nextReviewAt": "2026-08-31",
+    "updatedAt": "2026-08-31T10:11:00+08:00"
+  },
+  {
+    "id": "wrong-demo-003",
+    "questionId": "demo-q-017",
+    "wrongReason": "思路偏差",
+    "status": "pending",
+    "reviewCount": 0,
+    "nextReviewAt": "2026-08-31",
+    "updatedAt": "2026-08-30T11:22:00+08:00"
+  },
+  {
+    "id": "wrong-demo-004",
+    "questionId": "demo-q-007",
+    "wrongReason": "观察不细",
+    "status": "reviewing",
+    "reviewCount": 1,
+    "nextReviewAt": "2026-09-02",
+    "updatedAt": "2026-08-30T12:33:00+08:00"
+  },
+  {
+    "id": "wrong-demo-005",
+    "questionId": "demo-q-010",
+    "wrongReason": "粗心计算",
+    "status": "pending",
+    "reviewCount": 1,
+    "nextReviewAt": "2026-08-31",
+    "updatedAt": "2026-08-29T13:44:00+08:00"
+  },
+  {
+    "id": "wrong-demo-006",
+    "questionId": "demo-q-018",
+    "wrongReason": "概念混淆",
+    "status": "pending",
+    "reviewCount": 0,
+    "nextReviewAt": "2026-08-31",
+    "updatedAt": "2026-08-29T14:55:00+08:00"
+  },
+  {
+    "id": "wrong-demo-007",
+    "questionId": "demo-q-008",
+    "wrongReason": "概念不清",
+    "status": "reviewing",
+    "reviewCount": 2,
+    "nextReviewAt": "2026-09-03",
+    "updatedAt": "2026-08-28T15:06:00+08:00"
+  }
+]
diff --git a/server/src/data/seed.ts b/server/src/data/seed.ts
index 9832bac..983f889 100644
--- a/server/src/data/seed.ts
+++ b/server/src/data/seed.ts
@@ -1,50 +1,392 @@
 import { dataFiles } from './files.js'
 import { readData, writeData } from './store.js'
-import type { NewsItem, Profile, Question, StudyPlan } from '../types/index.js'
+import { addDays, todayISO } from '../utils/dates.js'
+import type {
+  MockExam,
+  NewsItem,
+  PracticeRecord,
+  Profile,
+  Question,
+  StudyPlan,
+  WrongQuestion
+} from '../schemas/entities.js'
+
+/* ------------------------------------------------------------------
+ * 演示题库：覆盖五大行测模块与若干子模块，供数据中枢、刷题、错题闭环使用。
+ * ------------------------------------------------------------------ */
 
 const questions: Question[] = [
   {
-    id: 'demo-q-001', type: '行测', module: '数量关系', subModule: '行程问题', difficulty: '中等',
-    stem: '甲、乙两车分别从 A、B 两地同时出发相向而行，甲车速度为 60km/h，乙车速度为 40km/h，两车相遇后甲车又行驶 2 小时到达 B 地，问 A、B 两地相距多少千米？',
-    options: [{ key: 'A', text: '240 千米' }, { key: 'B', text: '260 千米' }, { key: 'C', text: '280 千米' }, { key: 'D', text: '300 千米' }], answer: 'C',
-    analysis: '相遇后甲车行驶 60×2=120 千米，此路程等于乙车相遇前行驶的路程。由速度比可得相遇时间为 3 小时，两地距离为 100×3=300 千米。', tags: ['相遇问题'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
-  },
-  {
-    id: 'demo-q-002', type: '行测', module: '言语理解', subModule: '逻辑填空', difficulty: '简单',
+    id: 'demo-q-001', type: '行测', module: '言语理解', subModule: '逻辑填空', difficulty: '简单',
     stem: '在公共治理中，既要善于运用法治思维，也要避免治理方式过于____，让政策执行更有温度。',
-    options: [{ key: 'A', text: '机械' }, { key: 'B', text: '灵活' }, { key: 'C', text: '主动' }, { key: 'D', text: '积极' }], answer: 'A',
-    analysis: '根据“避免”与“更有温度”的语境，应选择表示僵化、不知变通的“机械”。', tags: ['语境分析'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+    options: [
+      { key: 'A', text: '机械' }, { key: 'B', text: '灵活' }, { key: 'C', text: '主动' }, { key: 'D', text: '积极' }
+    ],
+    answer: 'A', analysis: '根据“避免”与“更有温度”的语境，应选择表示僵化、不知变通的“机械”。',
+    tags: ['语境分析'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
   },
   {
-    id: 'demo-q-003', type: '行测', module: '判断推理', subModule: '图形推理', difficulty: '中等',
+    id: 'demo-q-002', type: '行测', module: '言语理解', subModule: '片段阅读', difficulty: '中等',
+    stem: '城市更新不是简单的“拆旧建新”，而是要在保留文脉的基础上注入现代功能。这段文字意在强调____。',
+    options: [
+      { key: 'A', text: '城市更新应当完全保留旧建筑' },
+      { key: 'B', text: '城市更新要兼顾文脉传承与现代功能' },
+      { key: 'C', text: '现代功能比文脉传承更重要' },
+      { key: 'D', text: '拆旧建新是最高效的方式' }
+    ],
+    answer: 'B', analysis: '文段用“不是……而是……”强调城市更新的真正内涵是兼顾传承与功能。',
+    tags: ['主旨概括'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-003', type: '行测', module: '言语理解', subModule: '语句排序', difficulty: '中等',
+    stem: '①这要求我们既要有战略定力 ②更要蹄疾步稳、久久为功 ③改革进入深水区 ④把顶层设计与基层探索结合起来。将以上句子组成语意连贯的语段，排序正确的是____。',
+    options: [
+      { key: 'A', text: '③①④②' }, { key: 'B', text: '①③②④' }, { key: 'C', text: '③④②①' }, { key: 'D', text: '④③①②' }
+    ],
+    answer: 'A', analysis: '③提出背景“改革进入深水区”，①承接“要求有战略定力”，④补充方法，②收束强调“更要”。',
+    tags: ['语句衔接'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-004', type: '行测', module: '数量关系', subModule: '行程问题', difficulty: '中等',
+    stem: '甲、乙两车分别从 A、B 两地同时出发相向而行，甲车速度 60km/h，乙车速度 40km/h，相遇后甲车又行驶 2 小时到达 B 地，问 A、B 两地相距多少千米？',
+    options: [
+      { key: 'A', text: '240 千米' }, { key: 'B', text: '260 千米' }, { key: 'C', text: '300 千米' }, { key: 'D', text: '280 千米' }
+    ],
+    answer: 'C', analysis: '相遇后甲车行驶 60×2=120 千米，等于乙车相遇前行驶路程；由速度比可得相遇时间 3 小时，两地相距 100×3=300 千米。',
+    tags: ['相遇问题'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-005', type: '行测', module: '数量关系', subModule: '工程问题', difficulty: '中等',
+    stem: '一项工程，甲单独做 12 天完成，乙单独做 18 天完成，两人合作 4 天后，剩余工程由乙单独完成，还需多少天？',
+    options: [
+      { key: 'A', text: '6 天' }, { key: 'B', text: '8 天' }, { key: 'C', text: '10 天' }, { key: 'D', text: '12 天' }
+    ],
+    answer: 'B', analysis: '合作 4 天完成 4×(1/12+1/18)=5/9，剩余 4/9，乙单独需 (4/9)÷(1/18)=8 天。',
+    tags: ['合作工程'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-006', type: '行测', module: '数量关系', subModule: '利润问题', difficulty: '困难',
+    stem: '某商品按进价提高 50% 标价，再打八折出售，结果每件盈利 40 元，则该商品的进价是多少元？',
+    options: [
+      { key: 'A', text: '150 元' }, { key: 'B', text: '200 元' }, { key: 'C', text: '250 元' }, { key: 'D', text: '300 元' }
+    ],
+    answer: 'B', analysis: '设进价 x，售价为 1.5x×0.8=1.2x，盈利 0.2x=40，解得 x=200 元。',
+    tags: ['折扣问题'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-007', type: '行测', module: '判断推理', subModule: '图形推理', difficulty: '中等',
     stem: '下列图形规律题中，若每次顺时针旋转 90°，第三个图形应如何变化？',
-    options: [{ key: 'A', text: '保持不变' }, { key: 'B', text: '顺时针旋转 90°' }, { key: 'C', text: '逆时针旋转 90°' }, { key: 'D', text: '翻转' }], answer: 'B',
-    analysis: '观察相邻图形可知，每一步均按顺时针方向旋转 90°。', tags: ['位置变化'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+    options: [
+      { key: 'A', text: '保持不变' }, { key: 'B', text: '顺时针旋转 90°' }, { key: 'C', text: '逆时针旋转 90°' }, { key: 'D', text: '上下翻转' }
+    ],
+    answer: 'B', analysis: '观察相邻图形可知，每一步均按顺时针方向旋转 90°。',
+    tags: ['位置变化'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-008', type: '行测', module: '判断推理', subModule: '逻辑判断', difficulty: '中等',
+    stem: '只有坚持问题导向，才能找准改革的突破口。由此可以推出____。',
+    options: [
+      { key: 'A', text: '坚持问题导向就能找准突破口' },
+      { key: 'B', text: '找准突破口必须坚持问题导向' },
+      { key: 'C', text: '不坚持问题导向也能找准突破口' },
+      { key: 'D', text: '找准突破口与问题导向无关' }
+    ],
+    answer: 'B', analysis: '“只有 A 才 B”为必要条件，等价于“B 推出 A”，故找准突破口必然坚持问题导向。',
+    tags: ['必要条件'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-009', type: '行测', module: '判断推理', subModule: '类比推理', difficulty: '简单',
+    stem: '教师：教书育人 与 ____ 最相似。',
+    options: [
+      { key: 'A', text: '医生：救死扶伤' }, { key: 'B', text: '医生：医院' }, { key: 'C', text: '教室：学生' }, { key: 'D', text: '讲台：粉笔' }
+    ],
+    answer: 'A', analysis: '题干为“职业：职责”关系，医生与救死扶伤同为职业与职责的关系。',
+    tags: ['对应关系'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-010', type: '行测', module: '资料分析', subModule: '增长率计算', difficulty: '中等',
+    stem: '某地去年 GDP 为 5000 亿元，今年为 5750 亿元，则今年的同比增长率为____。',
+    options: [
+      { key: 'A', text: '12%' }, { key: 'B', text: '13%' }, { key: 'C', text: '15%' }, { key: 'D', text: '16%' }
+    ],
+    answer: 'C', analysis: '增长率=(5750-5000)÷5000×100%=15%。',
+    tags: ['增长率'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-011', type: '行测', module: '资料分析', subModule: '基期量计算', difficulty: '困难',
+    stem: '某地区今年粮食产量为 1260 万吨，同比增长 5%，则去年粮食产量约为____。',
+    options: [
+      { key: 'A', text: '1180 万吨' }, { key: 'B', text: '1200 万吨' }, { key: 'C', text: '1210 万吨' }, { key: 'D', text: '1230 万吨' }
+    ],
+    answer: 'B', analysis: '基期量=1260÷(1+5%)=1260÷1.05=1200 万吨。',
+    tags: ['基期量'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-012', type: '行测', module: '常识判断', subModule: '法律常识', difficulty: '中等',
+    stem: '根据《中华人民共和国民法典》，自然人的民事权利能力始于____。',
+    options: [
+      { key: 'A', text: '年满 18 周岁' }, { key: 'B', text: '年满 16 周岁' }, { key: 'C', text: '出生' }, { key: 'D', text: '登记户口' }
+    ],
+    answer: 'C', analysis: '民事权利能力从出生时起到死亡时止，自然人一律平等享有。',
+    tags: ['民法'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-013', type: '行测', module: '常识判断', subModule: '时政热点', difficulty: '简单',
+    stem: '新发展理念的核心内容包括创新、协调、绿色、开放、____。',
+    options: [
+      { key: 'A', text: '共享' }, { key: 'B', text: '公平' }, { key: 'C', text: '效率' }, { key: 'D', text: '安全' }
+    ],
+    answer: 'A', analysis: '新发展理念即创新、协调、绿色、开放、共享五大发展理念。',
+    tags: ['新发展理念'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-014', type: '行测', module: '言语理解', subModule: '逻辑填空', difficulty: '困难',
+    stem: '面对复杂局面，既要保持____的战略定力，也要有____的应变能力，二者不可偏废。',
+    options: [
+      { key: 'A', text: '临危不乱 见微知著' }, { key: 'B', text: '一成不变 随机应变' }, { key: 'C', text: '从容不迫 游刃有余' }, { key: 'D', text: '处变不惊 灵活机动' }
+    ],
+    answer: 'D', analysis: '“处变不惊”对应战略定力，“灵活机动”对应应变能力，语义搭配最恰当。',
+    tags: ['成语辨析'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-015', type: '行测', module: '资料分析', subModule: '增长率计算', difficulty: '中等',
+    stem: '某企业一季度营收为 320 万元，二季度为 400 万元，则二季度环比增长率约为____。',
+    options: [
+      { key: 'A', text: '25%' }, { key: 'B', text: '28%' }, { key: 'C', text: '30%' }, { key: 'D', text: '32%' }
+    ],
+    answer: 'A', analysis: '环比增长率=(400-320)÷320×100%=25%。',
+    tags: ['环比增长'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-016', type: '行测', module: '数量关系', subModule: '行程问题', difficulty: '困难',
+    stem: '一艘船顺水航行 40 千米用 2 小时，逆水航行 24 千米用 3 小时，则水流速度是多少？',
+    options: [
+      { key: 'A', text: '3 km/h' }, { key: 'B', text: '4 km/h' }, { key: 'C', text: '5 km/h' }, { key: 'D', text: '6 km/h' }
+    ],
+    answer: 'D', analysis: '顺水速度 20 km/h，逆水速度 8 km/h，水流速度=(20-8)÷2=6 km/h。',
+    tags: ['流水行船'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-017', type: '行测', module: '判断推理', subModule: '图形推理', difficulty: '中等',
+    stem: '下列图形中，阴影部分的移动规律是每次顺时针移动一格，则第四个图形阴影应位于____。',
+    options: [
+      { key: 'A', text: '左上角' }, { key: 'B', text: '右上角' }, { key: 'C', text: '右下角' }, { key: 'D', text: '左下角' }
+    ],
+    answer: 'C', analysis: '阴影按顺时针方向每次移动一格，第四个图形位于右下角。',
+    tags: ['位置变化'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
+  },
+  {
+    id: 'demo-q-018', type: '行测', module: '资料分析', subModule: '增长率计算', difficulty: '中等',
+    stem: '某市今年居民人均可支配收入为 48000 元，同比增长 8%，则去年约为____。',
+    options: [
+      { key: 'A', text: '44000 元' }, { key: 'B', text: '44444 元' }, { key: 'C', text: '45000 元' }, { key: 'D', text: '46000 元' }
+    ],
+    answer: 'B', analysis: '基期量=48000÷(1+8%)≈44444 元。',
+    tags: ['基期量'], source: '内置演示题库', createdAt: '2026-08-27T00:00:00+08:00'
   }
 ]
 
-const profile: Profile = { nickname: '备考人', examDate: '2026-11-30', targetScore: 72, startedAt: '2026-06-01' }
-const plans: StudyPlan[] = [
-  { id: 'plan-demo-001', date: '2026-08-27', title: '言语理解专项', type: '刷题', target: '完成 20 题', status: 'done' },
-  { id: 'plan-demo-002', date: '2026-08-27', title: '数量关系专项', type: '刷题', target: '完成 15 题', status: 'done' },
-  { id: 'plan-demo-003', date: '2026-08-27', title: '错题复盘', type: '复习', target: '复习 8 道', status: 'pending' }
-]
-const news: NewsItem[] = [{ id: 'news-demo-001', title: '聚焦高质量发展，把握时代脉搏', category: '政治', summary: '持续推动高质量发展，为中国式现代化夯实基础。', content: '## 今日要闻\n\n高质量发展是全面建设社会主义现代化国家的首要任务。\n\n> 可用于申论积累：发展必须坚持以人民为中心。', source: '新华社', publishedAt: '2026-08-27T10:20:00+08:00', tags: ['高质量发展', '申论素材'], importSource: 'json' }]
+/* ------------------------------------------------------------------
+ * 演示作答记录：相对「今天」生成近 14 天的作答，使趋势、掌握度、
+ * 连续打卡、今日时长与薄弱考点均有可解释的真实数据。
+ * ------------------------------------------------------------------ */
 
+function at(date: string, hour: number, minute: number): string {
+  return `${date}T${String(hour).padStart(2, '0')}:${String(minute).padStart(2, '0')}:00+08:00`
+}
+
+// [距今天数, 题目ID, 是否正确, 耗时秒]
+type RecordSpec = [number, string, boolean, number]
+
+const recordSpecs: RecordSpec[] = [
+  // 今天（连续打卡第 6 天，今日时长约 25 分钟）
+  [0, 'demo-q-001', true, 120],
+  [0, 'demo-q-002', true, 150],
+  [0, 'demo-q-004', false, 300],
+  [0, 'demo-q-007', true, 90],
+  [0, 'demo-q-010', false, 360],
+  [0, 'demo-q-012', true, 60],
+  [0, 'demo-q-005', true, 180],
+  [0, 'demo-q-008', false, 240],
+  // 昨天
+  [1, 'demo-q-003', true, 180],
+  [1, 'demo-q-004', false, 240],
+  [1, 'demo-q-009', true, 60],
+  [1, 'demo-q-011', false, 300],
+  [1, 'demo-q-013', true, 50],
+  [1, 'demo-q-006', false, 260],
+  // 2 天前
+  [2, 'demo-q-001', true, 130],
+  [2, 'demo-q-007', true, 95],
+  [2, 'demo-q-010', true, 320],
+  [2, 'demo-q-014', false, 200],
+  [2, 'demo-q-012', true, 70],
+  // 3 天前
+  [3, 'demo-q-002', true, 140],
+  [3, 'demo-q-005', true, 190],
+  [3, 'demo-q-008', true, 200],
+  [3, 'demo-q-010', false, 310],
+  [3, 'demo-q-003', true, 170],
+  [3, 'demo-q-015', false, 280],
+  [3, 'demo-q-013', true, 55],
+  // 4 天前
+  [4, 'demo-q-004', false, 260],
+  [4, 'demo-q-009', true, 65],
+  [4, 'demo-q-012', false, 75],
+  [4, 'demo-q-001', true, 125],
+  // 5 天前
+  [5, 'demo-q-007', true, 100],
+  [5, 'demo-q-011', true, 320],
+  [5, 'demo-q-002', true, 155],
+  [5, 'demo-q-010', false, 300],
+  [5, 'demo-q-013', true, 60],
+  [5, 'demo-q-006', true, 250],
+  // 6 天前无作答（连续打卡在此中断）
+  // 7 天前
+  [7, 'demo-q-001', true, 135],
+  [7, 'demo-q-004', false, 270],
+  [7, 'demo-q-009', true, 60],
+  // 9 天前
+  [9, 'demo-q-008', true, 210],
+  [9, 'demo-q-010', false, 330],
+  [9, 'demo-q-012', true, 70],
+  [9, 'demo-q-002', true, 145],
+  // 11 天前
+  [11, 'demo-q-004', false, 280],
+  [11, 'demo-q-013', true, 55],
+  [11, 'demo-q-005', true, 175],
+  // 13 天前
+  [13, 'demo-q-003', true, 185],
+  [13, 'demo-q-010', false, 340],
+  [13, 'demo-q-007', true, 110],
+  [13, 'demo-q-012', true, 80],
+  [13, 'demo-q-004', false, 250]
+]
+
+function buildRecords(): PracticeRecord[] {
+  const byId = new Map(questions.map((q) => [q.id, q]))
+  return recordSpecs.map(([daysAgo, questionId, correct, seconds], index) => {
+    const question = byId.get(questionId)
+    if (!question) throw new Error(`演示记录引用了不存在的题目：${questionId}`)
+    const wrongKey = question.answer === 'A' ? 'B' : 'A'
+    return {
+      questionId,
+      sessionId: `demo-session-${daysAgo}-${index}`,
+      userAnswer: correct ? question.answer : wrongKey,
+      correct,
+      secondsUsed: seconds,
+      answeredAt: at(addDays(todayISO(), -daysAgo), 8 + (index % 10), (index * 7) % 60)
+    }
+  })
+}
+
+/* ------------------------------------------------------------------
+ * 演示模考、错题、计划、档案、要闻。
+ * ------------------------------------------------------------------ */
+
+function buildMockExams(): MockExam[] {
+  const rows: Array<[number, string, number, number[]]> = [
+    [30, '行测全真模考（一）', 54, [12, 9, 12, 10, 11]],
+    [22, '行测全真模考（二）', 58, [13, 10, 12, 11, 12]],
+    [15, '行测全真模考（三）', 61, [13, 11, 13, 12, 12]],
+    [8, '行测全真模考（四）', 64, [14, 12, 13, 12, 13]],
+    [1, '行测全真模考（五）', 67, [14, 12, 14, 13, 14]]
+  ]
+  return rows.map(([daysAgo, name, total, scores], i) => ({
+    id: `mock-demo-${i + 1}`,
+    name,
+    date: addDays(todayISO(), -daysAgo),
+    total,
+    modules: {
+      '言语理解': scores[0],
+      '数量关系': scores[1],
+      '判断推理': scores[2],
+      '资料分析': scores[3],
+      '常识判断': scores[4]
+    },
+    note: '演示模考数据',
+    createdAt: at(addDays(todayISO(), -daysAgo), 20, 0)
+  }))
+}
+
+function buildWrongQuestions(): WrongQuestion[] {
+  const today = todayISO()
+  const y1 = addDays(today, -1)
+  const y2 = addDays(today, -2)
+  const y3 = addDays(today, -3)
+  const rows: Array<[string, string, string, 'pending' | 'reviewing', number]> = [
+    // [id, questionId, 错因, 状态, reviewCount]
+    ['wrong-demo-001', 'demo-q-004', '公式记忆不牢', 'pending', 0],
+    ['wrong-demo-002', 'demo-q-016', '审题不清', 'pending', 0],
+    ['wrong-demo-003', 'demo-q-017', '思路偏差', 'pending', 0],
+    ['wrong-demo-004', 'demo-q-007', '观察不细', 'reviewing', 1],
+    ['wrong-demo-005', 'demo-q-010', '粗心计算', 'pending', 1],
+    ['wrong-demo-006', 'demo-q-018', '概念混淆', 'pending', 0],
+    ['wrong-demo-007', 'demo-q-008', '概念不清', 'reviewing', 2]
+  ]
+  const days = [today, today, y1, y1, y2, y2, y3]
+  return rows.map(([id, questionId, wrongReason, status, reviewCount], i) => ({
+    id,
+    questionId,
+    wrongReason,
+    status,
+    reviewCount,
+    nextReviewAt: status === 'pending' ? today : addDays(today, 1 + reviewCount),
+    updatedAt: at(days[i], 9 + i, (i * 11) % 60)
+  }))
+}
+
+function buildPlans(): StudyPlan[] {
+  const today = todayISO()
+  const yesterday = addDays(today, -1)
+  return [
+    { id: 'plan-demo-001', date: today, title: '言语理解专项', type: '刷题', target: '完成 20 题', status: 'done' },
+    { id: 'plan-demo-002', date: today, title: '资料分析专项', type: '刷题', target: '完成 15 题', status: 'pending' },
+    { id: 'plan-demo-003', date: today, title: '错题复盘', type: '复习', target: '复习 8 道', status: 'pending' },
+    { id: 'plan-demo-004', date: yesterday, title: '数量关系专项', type: '刷题', target: '完成 15 题', status: 'done' },
+    { id: 'plan-demo-005', date: yesterday, title: '常识积累', type: '阅读', target: '阅读 30 分钟', status: 'done' }
+  ]
+}
+
+const profile: Profile = { nickname: '备考人', examDate: '2026-11-30', targetScore: 72, startedAt: '2026-06-01' }
+
+const news: NewsItem[] = [
+  {
+    id: 'news-demo-001',
+    title: '聚焦高质量发展，把握时代脉搏',
+    category: '政治',
+    summary: '持续推动高质量发展，为中国式现代化夯实基础。',
+    content: '## 今日要闻\n\n高质量发展是全面建设社会主义现代化国家的首要任务。\n\n> 可用于申论积累：发展必须坚持以人民为中心。',
+    source: '新华社',
+    publishedAt: '2026-08-27T10:20:00+08:00',
+    tags: ['高质量发展', '申论素材'],
+    importSource: 'json'
+  }
+]
+
+/** 首次启动写入演示数据；已存在的文件不会覆盖。 */
 export async function initializeData() {
   await readData<Profile>(dataFiles.profile, profile)
   await readData(dataFiles.settings, { dailyTargetMinutes: 90, reminderTime: '19:30', preferredDuration: 15 })
   await readData<Question[]>(dataFiles.questions, questions)
   await readData(dataFiles.practiceSessions, [])
-  await readData(dataFiles.practiceRecords, [])
-  await readData(dataFiles.wrongQuestions, [])
-  await readData<StudyPlan[]>(dataFiles.studyPlans, plans)
-  await readData(dataFiles.mockExams, [])
+  await readData<PracticeRecord[]>(dataFiles.practiceRecords, buildRecords())
+  await readData<WrongQuestion[]>(dataFiles.wrongQuestions, buildWrongQuestions())
+  await readData<StudyPlan[]>(dataFiles.studyPlans, buildPlans())
+  await readData<MockExam[]>(dataFiles.mockExams, buildMockExams())
   await readData<NewsItem[]>(dataFiles.news, news)
 }
 
+/** 重置全部演示数据（用于演示与验收）。 */
 export async function resetDemoData() {
   await Promise.all([
-    writeData(dataFiles.profile, profile), writeData(dataFiles.questions, questions), writeData(dataFiles.studyPlans, plans), writeData(dataFiles.news, news)
+    writeData(dataFiles.profile, profile),
+    writeData(dataFiles.questions, questions),
+    writeData(dataFiles.practiceSessions, []),
+    writeData(dataFiles.practiceRecords, buildRecords()),
+    writeData(dataFiles.wrongQuestions, buildWrongQuestions()),
+    writeData(dataFiles.studyPlans, buildPlans()),
+    writeData(dataFiles.mockExams, buildMockExams()),
+    writeData(dataFiles.news, news)
   ])
 }
diff --git a/server/src/handlers/dashboard.ts b/server/src/handlers/dashboard.ts
index 004b964..3d9d191 100644
--- a/server/src/handlers/dashboard.ts
+++ b/server/src/handlers/dashboard.ts
@@ -1,7 +1,17 @@
 import { readData } from '../data/store.js'
 import { dataFiles } from '../data/files.js'
-import { todayISO } from '../utils/dates.js'
+import { addDays, todayISO } from '../utils/dates.js'
+import {
+  collectStudyDates,
+  computeDaysToExam,
+  computeMastery,
+  computeStreak,
+  computeWeakPoints,
+  dailyMinutes,
+  recordDate
+} from '../services/stats.js'
 import type {
+  MockExam,
   PracticeRecord,
   Profile,
   Question,
@@ -14,14 +24,15 @@ import { DashboardTrendsQuerySchema } from '../schemas/api.js'
 
 const DEFAULT_PROFILE: Profile = { nickname: '备考人', examDate: '2026-11-30', targetScore: 72, startedAt: todayISO() }
 
-/** 数据中枢概览：题目数、作答数、正确率、今日任务等（趋势类统计在任务 05 完善） */
+/** 数据中枢概览：备考天数、距离考试、连续打卡、今日四项指标等汇总 */
 export async function overview() {
-  const [profile, questions, records, plans, wrongQuestions] = await Promise.all([
+  const [profile, questions, records, plans, wrongQuestions, mockExams] = await Promise.all([
     readData<Profile>(dataFiles.profile, DEFAULT_PROFILE),
     readData<Question[]>(dataFiles.questions, []),
     readData<PracticeRecord[]>(dataFiles.practiceRecords, []),
     readData<StudyPlan[]>(dataFiles.studyPlans, []),
-    readData<WrongQuestion[]>(dataFiles.wrongQuestions, [])
+    readData<WrongQuestion[]>(dataFiles.wrongQuestions, []),
+    readData<MockExam[]>(dataFiles.mockExams, [])
   ])
 
   const totalAnswered = records.length
@@ -32,32 +43,54 @@ export async function overview() {
   const studyDays = Number.isNaN(startedMs) ? 0 : Math.max(1, Math.floor((Date.now() - startedMs) / 86_400_000) + 1)
 
   const today = todayISO()
+  const yesterday = addDays(today, -1)
   const todayPlans = plans.filter((p) => p.date === today)
 
+  const todayRecords = records.filter((r) => recordDate(r) === today)
+  const todayAnswered = todayRecords.length
+  const todayCorrect = todayRecords.filter((r) => r.correct).length
+  const todayAccuracy = todayAnswered === 0 ? 0 : Math.round((todayCorrect / todayAnswered) * 100)
+
+  const todayMinutes = dailyMinutes(records, today)
+  const yesterdayMinutes = dailyMinutes(records, yesterday)
+  const minutesDelta =
+    yesterdayMinutes === 0 ? null : Math.round(((todayMinutes - yesterdayMinutes) / yesterdayMinutes) * 100)
+
+  const studyDates = collectStudyDates(records, plans, mockExams)
+
   return {
     studyDays,
-    totalQuestions: questions.length,
-    totalAnswered,
-    accuracy,
-    streakDays: 0, // TODO 任务05：按自然日连续打卡计算
-    todayMinutes: 0, // TODO 任务05：按当日作答耗时汇总
+    daysToExam: computeDaysToExam(profile.examDate),
+    examDate: profile.examDate,
+    targetScore: profile.targetScore,
+    streakDays: computeStreak(studyDates),
+    checkedInToday: studyDates.has(today),
+    todayMinutes,
+    minutesDelta,
+    todayAnswered,
+    todayAccuracy,
     todayTasksDone: todayPlans.filter((p) => p.status === 'done').length,
     todayTasksTotal: todayPlans.length,
-    pendingReview: wrongQuestions.filter((w) => w.status !== 'mastered').length
+    pendingReview: wrongQuestions.filter((w) => w.status !== 'mastered').length,
+    todayNewWrong: wrongQuestions.filter((w) => w.updatedAt.slice(0, 10) === today).length,
+    totalQuestions: questions.length,
+    totalAnswered,
+    accuracy
   }
 }
 
-/** 学习趋势：最近 N 天每日作答数、正确率、学习分钟数（分钟数在任务 05 接入耗时汇总） */
+/** 学习趋势：最近 N 天每日作答数、正确率、学习分钟数 */
 export async function trends(request: FastifyRequest) {
   const { days } = request.query as z.infer<typeof DashboardTrendsQuerySchema>
   const records = await readData<PracticeRecord[]>(dataFiles.practiceRecords, [])
 
-  const byDate = new Map<string, { answered: number; correct: number }>()
+  const byDate = new Map<string, { answered: number; correct: number; seconds: number }>()
   for (const record of records) {
-    const date = record.answeredAt.slice(0, 10)
-    const bucket = byDate.get(date) ?? { answered: 0, correct: 0 }
+    const date = recordDate(record)
+    const bucket = byDate.get(date) ?? { answered: 0, correct: 0, seconds: 0 }
     bucket.answered += 1
     if (record.correct) bucket.correct += 1
+    bucket.seconds += record.secondsUsed
     byDate.set(date, bucket)
   }
 
@@ -71,9 +104,29 @@ export async function trends(request: FastifyRequest) {
       date: key,
       answered: bucket?.answered ?? 0,
       accuracy: bucket && bucket.answered > 0 ? Math.round((bucket.correct / bucket.answered) * 100) : 0,
-      minutes: 0 // TODO 任务05：接入每日学习时长
+      minutes: bucket ? Math.round(bucket.seconds / 60) : 0
     }
   })
 
   return { days: result }
 }
+
+/** 模块掌握度：最近 30 天五大模块的正确率与作答数 */
+export async function mastery() {
+  const [records, questions] = await Promise.all([
+    readData<PracticeRecord[]>(dataFiles.practiceRecords, []),
+    readData<Question[]>(dataFiles.questions, [])
+  ])
+  const questionById = new Map(questions.map((q) => [q.id, q]))
+  return { mastery: computeMastery(records, questionById) }
+}
+
+/** 本周薄弱考点：基于错题错因按子模块聚合 */
+export async function weakPoints() {
+  const [wrongQuestions, questions] = await Promise.all([
+    readData<WrongQuestion[]>(dataFiles.wrongQuestions, []),
+    readData<Question[]>(dataFiles.questions, [])
+  ])
+  const questionById = new Map(questions.map((q) => [q.id, q]))
+  return { weakPoints: computeWeakPoints(wrongQuestions, questionById) }
+}
diff --git a/server/src/routes.ts b/server/src/routes.ts
index 81b957d..57c3aaa 100644
--- a/server/src/routes.ts
+++ b/server/src/routes.ts
@@ -44,6 +44,16 @@ const routes: RouteDef[] = [
     response: { 200: schemas.DashboardTrendsResponseSchema },
     handler: dashboard.trends
   },
+  {
+    method: 'GET', url: '/api/dashboard/mastery', summary: '模块掌握度', tags: ['数据中枢'],
+    response: { 200: schemas.DashboardMasteryResponseSchema },
+    handler: dashboard.mastery
+  },
+  {
+    method: 'GET', url: '/api/dashboard/weak-points', summary: '薄弱考点', tags: ['数据中枢'],
+    response: { 200: schemas.DashboardWeakPointsResponseSchema },
+    handler: dashboard.weakPoints
+  },
 
   // 刷题
   {
diff --git a/server/src/schemas/api.ts b/server/src/schemas/api.ts
index 344b12d..9ca7d61 100644
--- a/server/src/schemas/api.ts
+++ b/server/src/schemas/api.ts
@@ -47,14 +47,22 @@ export const ImportResultSchema = z.object({
 // ---------- 数据中枢 ----------
 export const DashboardOverviewResponseSchema = z.object({
   studyDays: z.number().int().min(0),
-  totalQuestions: z.number().int().min(0),
-  totalAnswered: z.number().int().min(0),
-  accuracy: z.number().int().min(0).max(100),
+  daysToExam: z.number().int().min(0),
+  examDate: dateParam,
+  targetScore: z.number().int().min(0).max(100),
   streakDays: z.number().int().min(0),
+  checkedInToday: z.boolean(),
   todayMinutes: z.number().int().min(0),
+  minutesDelta: z.number().int().nullable(),
+  todayAnswered: z.number().int().min(0),
+  todayAccuracy: z.number().int().min(0).max(100),
   todayTasksDone: z.number().int().min(0),
   todayTasksTotal: z.number().int().min(0),
-  pendingReview: z.number().int().min(0)
+  pendingReview: z.number().int().min(0),
+  todayNewWrong: z.number().int().min(0),
+  totalQuestions: z.number().int().min(0),
+  totalAnswered: z.number().int().min(0),
+  accuracy: z.number().int().min(0).max(100)
 })
 export const DashboardTrendsQuerySchema = z.object({
   days: z.number().int().min(1).max(90).default(14)
@@ -69,6 +77,25 @@ export const DashboardTrendsResponseSchema = z.object({
     })
   )
 })
+export const DashboardMasteryResponseSchema = z.object({
+  mastery: z.array(
+    z.object({
+      module: z.enum(MODULES),
+      answered: z.number().int().min(0),
+      accuracy: z.number().int().min(0).max(100)
+    })
+  )
+})
+export const DashboardWeakPointsResponseSchema = z.object({
+  weakPoints: z.array(
+    z.object({
+      module: z.enum(MODULES),
+      point: z.string(),
+      count: z.number().int().min(1),
+      reasons: z.array(z.string())
+    })
+  )
+})
 
 // ---------- 刷题 ----------
 export const PracticeModulesResponseSchema = z.object({
diff --git a/server/src/services/stats.ts b/server/src/services/stats.ts
new file mode 100644
index 0000000..02c693c
--- /dev/null
+++ b/server/src/services/stats.ts
@@ -0,0 +1,141 @@
+import { addDays, todayISO } from '../utils/dates.js'
+import { MODULES } from '../schemas/entities.js'
+import type { MockExam, PracticeRecord, Question, StudyPlan, WrongQuestion } from '../schemas/entities.js'
+
+/** 掌握度统计窗口：最近 30 天（需求文档 4.3） */
+const MASTERY_WINDOW_DAYS = 30
+
+type ModuleName = (typeof MODULES)[number]
+
+export interface ModuleMastery {
+  module: ModuleName
+  answered: number
+  accuracy: number
+}
+
+export interface WeakPoint {
+  module: ModuleName
+  point: string
+  count: number
+  reasons: string[]
+}
+
+/** 作答记录的本地日期（YYYY-MM-DD，取 answeredAt 前 10 位） */
+export function recordDate(record: PracticeRecord): string {
+  return record.answeredAt.slice(0, 10)
+}
+
+/**
+ * 汇总所有「当日学习行为」的日期集合（用于连续打卡）。
+ * 完成一道题、一次错题复习、一个计划任务或一次模考录入，均计为当日学习行为。
+ */
+export function collectStudyDates(
+  records: PracticeRecord[],
+  plans: StudyPlan[],
+  mockExams: MockExam[]
+): Set<string> {
+  const dates = new Set<string>()
+  for (const record of records) dates.add(recordDate(record))
+  for (const plan of plans) if (plan.status === 'done') dates.add(plan.date)
+  for (const exam of mockExams) dates.add(exam.date)
+  return dates
+}
+
+/** 连续打卡天数：今天尚未学习不中断，从今天或昨天起向前连续计数，缺失一天即归零。 */
+export function computeStreak(dates: Set<string>): number {
+  if (dates.size === 0) return 0
+  let cursor = todayISO()
+  if (!dates.has(cursor)) cursor = addDays(cursor, -1)
+  let streak = 0
+  while (dates.has(cursor)) {
+    streak += 1
+    cursor = addDays(cursor, -1)
+  }
+  return streak
+}
+
+/** 某一天的学习时长（分钟）：当日作答记录 secondsUsed 汇总。 */
+export function dailyMinutes(records: PracticeRecord[], date: string): number {
+  const seconds = records
+    .filter((record) => recordDate(record) === date)
+    .reduce((sum, record) => sum + record.secondsUsed, 0)
+  return Math.round(seconds / 60)
+}
+
+/** 距离考试的天数（按 YYYY-MM-DD 计算，已过则为 0） */
+export function computeDaysToExam(examDate: string): number {
+  const target = new Date(`${examDate}T00:00:00Z`)
+  const today = new Date(`${todayISO()}T00:00:00Z`)
+  const diff = Math.round((target.getTime() - today.getTime()) / 86_400_000)
+  return Math.max(0, diff)
+}
+
+function withinWindow(date: string, since: string): boolean {
+  return date >= since
+}
+
+/**
+ * 五大模块掌握度：最近 30 天正确作答数 ÷ 有效作答总数 × 100%。
+ * 无作答的模块 answered=0、accuracy=0（前端据此区分「暂无数据」）。
+ */
+export function computeMastery(
+  records: PracticeRecord[],
+  questionById: Map<string, Question>
+): ModuleMastery[] {
+  const since = addDays(todayISO(), -(MASTERY_WINDOW_DAYS - 1))
+  return MODULES.map((module) => {
+    let answered = 0
+    let correct = 0
+    for (const record of records) {
+      if (!withinWindow(recordDate(record), since)) continue
+      const question = questionById.get(record.questionId)
+      if (!question || question.module !== module) continue
+      answered += 1
+      if (record.correct) correct += 1
+    }
+    return {
+      module,
+      answered,
+      accuracy: answered === 0 ? 0 : Math.round((correct / answered) * 100)
+    }
+  })
+}
+
+/**
+ * 本周薄弱考点：基于错题（错因归因）按子模块聚合，仅统计最近 7 天。
+ * count = 该子模块错题条数，reasons = 去重后的错因列表，按错题数降序。
+ */
+export function computeWeakPoints(
+  wrongQuestions: WrongQuestion[],
+  questionById: Map<string, Question>,
+  limit = 6
+): WeakPoint[] {
+  const since = addDays(todayISO(), -6)
+  const groups = new Map<string, { module: ModuleName; point: string; count: number; reasons: Set<string> }>()
+
+  for (const wrong of wrongQuestions) {
+    if (wrong.updatedAt.slice(0, 10) < since) continue
+    const question = questionById.get(wrong.questionId)
+    if (!question) continue
+    const key = `${question.module}\u0000${question.subModule}`
+    const group = groups.get(key) ?? {
+      module: question.module as ModuleName,
+      point: question.subModule,
+      count: 0,
+      reasons: new Set<string>()
+    }
+    group.count += 1
+    if (wrong.wrongReason) group.reasons.add(wrong.wrongReason)
+    groups.set(key, group)
+  }
+
+  return [...groups.values()]
+    .sort((a, b) => b.count - a.count)
+    .slice(0, limit)
+    .map((group) => ({
+      module: group.module,
+      point: group.point,
+      count: group.count,
+      reasons: [...group.reasons]
+    }))
+}