diff --git a/data/page_status.json b/data/page_status.json
index dc37fa7..6925e2f 100644
--- a/data/page_status.json
+++ b/data/page_status.json
@@ -26,6 +26,13 @@
       "drawer_id": "drawer-2",
       "order": 3
     },
+    {
+      "route": "/reject-history",
+      "name": "報廢歷史查詢",
+      "status": "dev",
+      "drawer_id": "drawer-2",
+      "order": 4
+    },
     {
       "route": "/wip-detail",
       "name": "WIP 明細",
@@ -147,4 +154,4 @@
       "admin_only": false
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/docs/reject_history_performance.md b/docs/reject_history_performance.md
index 97d4820..2b44621 100644
--- a/docs/reject_history_performance.md
+++ b/docs/reject_history_performance.md
@@ -7,6 +7,7 @@
 - `DWH.DW_MES_LOTREJECTHISTORY`: 不良/報廢事實表（主來源）
 - `DWH.DW_MES_CONTAINER`: 補齊 `PJ_TYPE`、`PRODUCTLINENAME`、`MFGORDERNAME`
 - `DWH.DW_MES_SPEC_WORKCENTER_V`: 對應 `WORKCENTER_GROUP` 與排序欄位
+- `DWH.ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE`: 良率排除政策表（`ENABLE_FLAG='Y'` 代表不納入良率計算）
 
 ## 資料評估重點（2026-02-13，近 30 天樣本）
 - `DW_MES_LOTREJECTHISTORY` 共 `230,074` 筆；`HISTORYMAINLINEID` 僅 `75,683` 個。
@@ -33,12 +34,69 @@
   - `DEFECT_RATE_PCT = DEFECT_QTY / MOVEIN_QTY * 100`
   - `REJECT_SHARE_PCT = REJECT_TOTAL_QTY / (REJECT_TOTAL_QTY + DEFECT_QTY) * 100`
 
+## 排除政策與前端開關
+- 預設模式：排除 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` 中 `ENABLE_FLAG='Y'` 的報廢原因。
+- 可切換模式：提供 `include_excluded_scrap=true|false` 讓使用者決定是否納入。
+- 前端頁面提供「納入不計良率報廢」開關，並同步影響 summary/trend/pareto/list/export。
+- 排除原因清單採全表快取，預設每日刷新一次（Redis 優先、記憶體 fallback）。
+
+## API 與欄位契約
+- `GET /api/reject-history/options`
+  - 回傳 `workcenter_groups`、`reasons` 與政策 `meta`
+- `GET /api/reject-history/summary`
+  - 回傳 `MOVEIN_QTY`、`REJECT_TOTAL_QTY`、`DEFECT_QTY`、`REJECT_RATE_PCT`、`DEFECT_RATE_PCT`、`REJECT_SHARE_PCT`、`AFFECTED_LOT_COUNT`、`AFFECTED_WORKORDER_COUNT`
+- `GET /api/reject-history/trend`
+  - 回傳趨勢 `items[]`，每筆含 `bucket_date`、`REJECT_TOTAL_QTY`、`DEFECT_QTY`、`REJECT_RATE_PCT`、`DEFECT_RATE_PCT`
+- `GET /api/reject-history/reason-pareto`
+  - 支援 `metric_mode=reject_total|defect`
+  - 支援 `pareto_scope=top80|all`（預設 `top80`）
+- `GET /api/reject-history/list`
+  - 分頁回傳 `items[]` 與 `pagination`
+  - 明細保留五個 reject 欄位（`REJECT_QTY`、`STANDBY_QTY`、`QTYTOPROCESS_QTY`、`INPROCESS_QTY`、`PROCESSED_QTY`）與 `DEFECT_QTY`
+- `GET /api/reject-history/export`
+  - CSV 欄位與 list 語義一致，含 `REJECT_TOTAL_QTY` 與 `DEFECT_QTY`
+
+## 前端視覺與互動
+- 主要區塊：
+  - Header（語義 badge + 更新時間）
+  - 篩選區（時間、原因、`WORKCENTER_GROUP`、政策開關、Pareto 前 80% 開關）
+  - KPI（8 張卡，Reject 暖色語義 / Defect 冷色語義）
+  - 趨勢圖（報廢量與報廢率分圖）
+  - Pareto（柱狀 + 累積線）與明細表
+- 互動規則：
+  - Pareto 點選原因後，會套用為 active filter chip 並重查
+  - 再次點選同原因會取消篩選
+  - 預設僅顯示累計前 80%，可切換顯示完整 Pareto
+  - 匯出 CSV 使用目前畫面相同篩選條件
+
 ## 交付檔案
 - 建表 + 刷新 SQL：`docs/reject_history_performance.sql`
 - 可被應用層直接載入的查詢 SQL：`src/mes_dashboard/sql/reject_history/performance_daily.sql`
 
+## 上線與回滾策略
+- 上線策略：
+  - 先維持 `data/page_status.json` 中 `/reject-history` 為 `dev`
+  - 完成 UAT 後再改為 `released`
+- 回滾策略：
+  - 將 `/reject-history` 狀態切回 `dev` 或移除導航入口
+  - 保留 API 與既有頁面，不影響既有報表
+- 快取策略：
+  - 排除政策表每日全表刷新（預設 86400 秒）
+  - Redis 異常時退回記憶體快取，不阻斷查詢
+
+## 驗證紀錄（2026-02-13）
+- 後端/整合測試：
+  - `pytest -q tests/test_reject_history_service.py tests/test_scrap_reason_exclusion_cache.py tests/test_reject_history_routes.py tests/test_reject_history_shell_coverage.py tests/test_portal_shell_wave_b_native_smoke.py::test_reject_history_native_smoke_query_sections_and_export tests/test_app_factory.py::AppFactoryTests::test_routes_registered`
+  - 結果：`22 passed`
+- 前端建置：
+  - `cd frontend && npm run build`
+  - 結果：成功產出 `reject-history.html/js/css`，並完成 dist 複製流程
+
 ## 建議排程
 - 每日跑前一日增量：
   - `:start_date = TRUNC(SYSDATE - 1)`
   - `:end_date = TRUNC(SYSDATE - 1)`
 - 每月第一天補跑前 31 天，避免補數漏失。
+
+## 已知環境備註
+- `tests/test_navigation_contract.py` 需要 `docs/migration/portal-no-iframe/baseline_drawer_visibility.json`。目前工作區缺少此 baseline 檔案，屬既有環境缺口，與本次 reject-history 開發內容無直接耦合。
diff --git a/frontend/src/portal-shell/nativeModuleRegistry.js b/frontend/src/portal-shell/nativeModuleRegistry.js
index 5a16462..9e8e3d3 100644
--- a/frontend/src/portal-shell/nativeModuleRegistry.js
+++ b/frontend/src/portal-shell/nativeModuleRegistry.js
@@ -34,6 +34,10 @@ const NATIVE_MODULE_LOADERS = Object.freeze({
     () => import('../hold-history/App.vue'),
     [() => import('../wip-shared/styles.css'), () => import('../hold-history/style.css')],
   ),
+  '/reject-history': createNativeLoader(
+    () => import('../reject-history/App.vue'),
+    [() => import('../wip-shared/styles.css'), () => import('../reject-history/style.css')],
+  ),
   '/resource': createNativeLoader(
     () => import('../resource-status/App.vue'),
     [() => import('../resource-shared/styles.css'), () => import('../resource-status/style.css')],
diff --git a/frontend/src/portal-shell/routeContracts.js b/frontend/src/portal-shell/routeContracts.js
index 21a54ab..9da0493 100644
--- a/frontend/src/portal-shell/routeContracts.js
+++ b/frontend/src/portal-shell/routeContracts.js
@@ -4,6 +4,7 @@ const IN_SCOPE_REPORT_ROUTES = Object.freeze([
   '/hold-overview',
   '/hold-detail',
   '/hold-history',
+  '/reject-history',
   '/resource',
   '/resource-history',
   '/qc-gate',
@@ -109,6 +110,17 @@ const ROUTE_CONTRACTS = Object.freeze({
     scope: 'in-scope',
     compatibilityPolicy: 'redirect_to_shell_when_spa_enabled',
   }),
+  '/reject-history': buildContract({
+    route: '/reject-history',
+    routeId: 'reject-history',
+    renderMode: 'native',
+    owner: 'frontend-mes-reporting',
+    title: '報廢歷史查詢',
+    rollbackStrategy: 'fallback_to_legacy_route',
+    visibilityPolicy: 'released_or_admin',
+    scope: 'in-scope',
+    compatibilityPolicy: 'redirect_to_shell_when_spa_enabled',
+  }),
   '/resource': buildContract({
     route: '/resource',
     routeId: 'resource',
diff --git a/frontend/src/reject-history/App.vue b/frontend/src/reject-history/App.vue
new file mode 100644
index 0000000..5a50e5d
--- /dev/null
+++ b/frontend/src/reject-history/App.vue
@@ -0,0 +1,968 @@
+<script setup>
+import { computed, onMounted, reactive, ref } from 'vue';
+
+import { BarChart, LineChart } from 'echarts/charts';
+import { GridComponent, LegendComponent, TooltipComponent } from 'echarts/components';
+import { use } from 'echarts/core';
+import { CanvasRenderer } from 'echarts/renderers';
+import VChart from 'vue-echarts';
+
+import { apiGet } from '../core/api.js';
+import { replaceRuntimeHistory } from '../core/shell-navigation.js';
+import MultiSelect from '../resource-shared/components/MultiSelect.vue';
+
+use([CanvasRenderer, BarChart, LineChart, GridComponent, TooltipComponent, LegendComponent]);
+
+const API_TIMEOUT = 60000;
+const DEFAULT_PER_PAGE = 50;
+
+const filters = reactive({
+  startDate: '',
+  endDate: '',
+  workcenterGroups: [],
+  packages: [],
+  reason: '',
+  includeExcludedScrap: false,
+  excludeMaterialScrap: true,
+  paretoTop80: true,
+});
+
+const page = ref(1);
+const detailReason = ref('');
+
+const options = reactive({
+  workcenterGroups: [],
+  packages: [],
+  reasons: [],
+});
+
+const summary = ref({
+  MOVEIN_QTY: 0,
+  REJECT_TOTAL_QTY: 0,
+  DEFECT_QTY: 0,
+  REJECT_RATE_PCT: 0,
+  DEFECT_RATE_PCT: 0,
+  REJECT_SHARE_PCT: 0,
+  AFFECTED_LOT_COUNT: 0,
+  AFFECTED_WORKORDER_COUNT: 0,
+});
+
+const trend = ref({ items: [], granularity: 'day' });
+const pareto = ref({ items: [], metric_mode: 'reject_total', pareto_scope: 'top80' });
+const detail = ref({
+  items: [],
+  pagination: {
+    page: 1,
+    perPage: DEFAULT_PER_PAGE,
+    total: 0,
+    totalPages: 1,
+  },
+});
+
+const loading = reactive({
+  initial: true,
+  querying: false,
+  options: false,
+  list: false,
+  pareto: false,
+});
+
+const errorMessage = ref('');
+const lastQueryAt = ref('');
+const lastPolicyMeta = ref({
+  include_excluded_scrap: false,
+  exclusion_applied: false,
+  excluded_reason_count: 0,
+});
+
+let activeRequestId = 0;
+
+function nextRequestId() {
+  activeRequestId += 1;
+  return activeRequestId;
+}
+
+function isStaleRequest(requestId) {
+  return requestId !== activeRequestId;
+}
+
+function toDateString(value) {
+  const y = value.getFullYear();
+  const m = String(value.getMonth() + 1).padStart(2, '0');
+  const d = String(value.getDate()).padStart(2, '0');
+  return `${y}-${m}-${d}`;
+}
+
+function setDefaultDateRange() {
+  const today = new Date();
+  const end = new Date(today);
+  end.setDate(end.getDate() - 1);
+  const start = new Date(end);
+  start.setDate(start.getDate() - 29);
+  filters.startDate = toDateString(start);
+  filters.endDate = toDateString(end);
+}
+
+function readArrayParam(params, key) {
+  const repeated = params.getAll(key).map((value) => String(value || '').trim()).filter(Boolean);
+  if (repeated.length > 0) {
+    return repeated;
+  }
+  return String(params.get(key) || '')
+    .split(',')
+    .map((value) => value.trim())
+    .filter(Boolean);
+}
+
+function readBooleanParam(params, key, defaultValue = false) {
+  const value = String(params.get(key) || '').trim().toLowerCase();
+  if (!value) {
+    return defaultValue;
+  }
+  return ['1', 'true', 'yes', 'y', 'on'].includes(value);
+}
+
+function restoreFromUrl() {
+  const params = new URLSearchParams(window.location.search);
+  const startDate = String(params.get('start_date') || '').trim();
+  const endDate = String(params.get('end_date') || '').trim();
+
+  if (startDate && endDate) {
+    filters.startDate = startDate;
+    filters.endDate = endDate;
+  }
+
+  const wcGroups = readArrayParam(params, 'workcenter_groups');
+  if (wcGroups.length > 0) {
+    filters.workcenterGroups = wcGroups;
+  }
+
+  const packages = readArrayParam(params, 'packages');
+  if (packages.length > 0) {
+    filters.packages = packages;
+  }
+
+  const reason = String(params.get('reason') || '').trim();
+  if (reason) {
+    filters.reason = reason;
+  }
+  const detailReasonFromUrl = String(params.get('detail_reason') || '').trim();
+  if (detailReasonFromUrl) {
+    detailReason.value = detailReasonFromUrl;
+  }
+
+  filters.includeExcludedScrap = readBooleanParam(params, 'include_excluded_scrap', false);
+  filters.excludeMaterialScrap = readBooleanParam(params, 'exclude_material_scrap', true);
+  filters.paretoTop80 = !readBooleanParam(params, 'pareto_scope_all', false);
+
+  const parsedPage = Number(params.get('page') || '1');
+  page.value = Number.isFinite(parsedPage) && parsedPage > 0 ? parsedPage : 1;
+}
+
+function updateUrlState() {
+  const params = new URLSearchParams();
+
+  params.set('start_date', filters.startDate);
+  params.set('end_date', filters.endDate);
+  filters.workcenterGroups.forEach((item) => params.append('workcenter_groups', item));
+  filters.packages.forEach((item) => params.append('packages', item));
+
+  if (filters.reason) {
+    params.set('reason', filters.reason);
+  }
+  if (detailReason.value) {
+    params.set('detail_reason', detailReason.value);
+  }
+
+  if (filters.includeExcludedScrap) {
+    params.set('include_excluded_scrap', 'true');
+  }
+  params.set('exclude_material_scrap', String(filters.excludeMaterialScrap));
+
+  if (!filters.paretoTop80) {
+    params.set('pareto_scope_all', 'true');
+  }
+
+  if (page.value > 1) {
+    params.set('page', String(page.value));
+  }
+
+  replaceRuntimeHistory(`/reject-history?${params.toString()}`);
+}
+
+function formatNumber(value) {
+  return Number(value || 0).toLocaleString('zh-TW');
+}
+
+function formatPct(value) {
+  return `${Number(value || 0).toFixed(2)}%`;
+}
+
+function unwrapApiResult(result, fallbackMessage) {
+  if (result?.success === true) {
+    return result;
+  }
+  if (result?.success === false) {
+    throw new Error(result.error || fallbackMessage);
+  }
+  return result;
+}
+
+function buildCommonParams({ reason = filters.reason } = {}) {
+  const params = {
+    start_date: filters.startDate,
+    end_date: filters.endDate,
+    workcenter_groups: filters.workcenterGroups,
+    packages: filters.packages,
+    include_excluded_scrap: filters.includeExcludedScrap,
+    exclude_material_scrap: filters.excludeMaterialScrap,
+  };
+
+  if (reason) {
+    params.reasons = [reason];
+  }
+
+  return params;
+}
+
+function buildParetoParams() {
+  return {
+    ...buildCommonParams({ reason: filters.reason }),
+    metric_mode: 'reject_total',
+    pareto_scope: filters.paretoTop80 ? 'top80' : 'all',
+  };
+}
+
+function buildListParams() {
+  const effectiveReason = detailReason.value || filters.reason;
+  return {
+    ...buildCommonParams({ reason: effectiveReason }),
+    page: page.value,
+    per_page: DEFAULT_PER_PAGE,
+  };
+}
+
+async function fetchOptions() {
+  const response = await apiGet('/api/reject-history/options', {
+    params: {
+      start_date: filters.startDate,
+      end_date: filters.endDate,
+      include_excluded_scrap: filters.includeExcludedScrap,
+      exclude_material_scrap: filters.excludeMaterialScrap,
+    },
+    timeout: API_TIMEOUT,
+  });
+  const payload = unwrapApiResult(response, '載入篩選選項失敗');
+  return payload.data || {};
+}
+
+async function fetchSummary() {
+  const response = await apiGet('/api/reject-history/summary', {
+    params: buildCommonParams(),
+    timeout: API_TIMEOUT,
+  });
+  const payload = unwrapApiResult(response, '載入摘要資料失敗');
+  return payload;
+}
+
+async function fetchTrend() {
+  const response = await apiGet('/api/reject-history/trend', {
+    params: {
+      ...buildCommonParams(),
+      granularity: 'day',
+    },
+    timeout: API_TIMEOUT,
+  });
+  const payload = unwrapApiResult(response, '載入趨勢資料失敗');
+  return payload;
+}
+
+async function fetchPareto() {
+  const response = await apiGet('/api/reject-history/reason-pareto', {
+    params: buildParetoParams(),
+    timeout: API_TIMEOUT,
+  });
+  const payload = unwrapApiResult(response, '載入柏拉圖資料失敗');
+  return payload;
+}
+
+async function fetchList() {
+  const response = await apiGet('/api/reject-history/list', {
+    params: buildListParams(),
+    timeout: API_TIMEOUT,
+  });
+  const payload = unwrapApiResult(response, '載入明細資料失敗');
+  return payload;
+}
+
+function mergePolicyMeta(meta) {
+  lastPolicyMeta.value = {
+    include_excluded_scrap: Boolean(meta?.include_excluded_scrap),
+    exclusion_applied: Boolean(meta?.exclusion_applied),
+    excluded_reason_count: Number(meta?.excluded_reason_count || 0),
+  };
+}
+
+function normalizeFiltersByOptions() {
+  if (filters.reason && !options.reasons.includes(filters.reason)) {
+    filters.reason = '';
+  }
+
+  if (filters.packages.length > 0) {
+    const packageSet = new Set(options.packages);
+    filters.packages = filters.packages.filter((pkg) => packageSet.has(pkg));
+  }
+}
+
+async function loadAllData({ loadOptions = true } = {}) {
+  const requestId = nextRequestId();
+
+  loading.querying = true;
+  loading.list = true;
+  loading.pareto = true;
+  errorMessage.value = '';
+
+  try {
+    const tasks = [fetchSummary(), fetchTrend(), fetchPareto(), fetchList()];
+    if (loadOptions) {
+      loading.options = true;
+      tasks.push(fetchOptions());
+    }
+
+    const responses = await Promise.all(tasks);
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+
+    const [summaryResp, trendResp, paretoResp, listResp, optionsResp] = responses;
+
+    summary.value = summaryResp.data || summary.value;
+    trend.value = trendResp.data || trend.value;
+    pareto.value = paretoResp.data || pareto.value;
+    detail.value = listResp.data || detail.value;
+
+    const meta = {
+      ...(summaryResp.meta || {}),
+      ...(trendResp.meta || {}),
+      ...(paretoResp.meta || {}),
+      ...(listResp.meta || {}),
+    };
+    mergePolicyMeta(meta);
+
+    if (loadOptions && optionsResp) {
+      options.workcenterGroups = Array.isArray(optionsResp.workcenter_groups)
+        ? optionsResp.workcenter_groups
+        : [];
+      options.reasons = Array.isArray(optionsResp.reasons)
+        ? optionsResp.reasons
+        : [];
+      options.packages = Array.isArray(optionsResp.packages)
+        ? optionsResp.packages
+        : [];
+      normalizeFiltersByOptions();
+    }
+
+    lastQueryAt.value = new Date().toLocaleString('zh-TW');
+    updateUrlState();
+  } catch (error) {
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    errorMessage.value = error?.message || '載入資料失敗';
+  } finally {
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    loading.initial = false;
+    loading.querying = false;
+    loading.options = false;
+    loading.list = false;
+    loading.pareto = false;
+  }
+}
+
+async function loadListOnly() {
+  const requestId = nextRequestId();
+  loading.list = true;
+  errorMessage.value = '';
+
+  try {
+    const listResp = await fetchList();
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    detail.value = listResp.data || detail.value;
+    mergePolicyMeta(listResp.meta || {});
+    updateUrlState();
+  } catch (error) {
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    errorMessage.value = error?.message || '載入明細資料失敗';
+  } finally {
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    loading.list = false;
+  }
+}
+
+async function loadParetoOnly() {
+  const requestId = nextRequestId();
+  loading.pareto = true;
+  errorMessage.value = '';
+
+  try {
+    const paretoResp = await fetchPareto();
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    pareto.value = paretoResp.data || pareto.value;
+    mergePolicyMeta(paretoResp.meta || {});
+    updateUrlState();
+  } catch (error) {
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    errorMessage.value = error?.message || '載入柏拉圖資料失敗';
+  } finally {
+    if (isStaleRequest(requestId)) {
+      return;
+    }
+    loading.pareto = false;
+  }
+}
+
+function applyFilters() {
+  page.value = 1;
+  detailReason.value = '';
+  void loadAllData({ loadOptions: true });
+}
+
+function clearFilters() {
+  setDefaultDateRange();
+  filters.workcenterGroups = [];
+  filters.packages = [];
+  filters.reason = '';
+  detailReason.value = '';
+  filters.includeExcludedScrap = false;
+  filters.excludeMaterialScrap = true;
+  filters.paretoTop80 = true;
+  page.value = 1;
+  void loadAllData({ loadOptions: true });
+}
+
+function goToPage(nextPage) {
+  if (nextPage < 1 || nextPage > Number(detail.value?.pagination?.totalPages || 1)) {
+    return;
+  }
+  page.value = nextPage;
+  void loadListOnly();
+}
+
+function onParetoClick(reason) {
+  if (!reason) {
+    return;
+  }
+  detailReason.value = detailReason.value === reason ? '' : reason;
+  page.value = 1;
+  void loadListOnly();
+}
+
+function handleParetoScopeToggle(checked) {
+  filters.paretoTop80 = Boolean(checked);
+  void loadParetoOnly();
+}
+
+function removeFilterChip(chip) {
+  if (!chip?.removable) {
+    return;
+  }
+
+  if (chip.type === 'reason') {
+    filters.reason = '';
+    detailReason.value = '';
+  } else if (chip.type === 'workcenter') {
+    filters.workcenterGroups = filters.workcenterGroups.filter((item) => item !== chip.value);
+  } else if (chip.type === 'package') {
+    filters.packages = filters.packages.filter((item) => item !== chip.value);
+  } else if (chip.type === 'detail-reason') {
+    detailReason.value = '';
+    page.value = 1;
+    void loadListOnly();
+    return;
+  } else {
+    return;
+  }
+
+  page.value = 1;
+  void loadAllData({ loadOptions: false });
+}
+
+function exportCsv() {
+  const params = new URLSearchParams();
+  params.set('start_date', filters.startDate);
+  params.set('end_date', filters.endDate);
+  params.set('include_excluded_scrap', String(filters.includeExcludedScrap));
+  params.set('exclude_material_scrap', String(filters.excludeMaterialScrap));
+
+  filters.workcenterGroups.forEach((item) => params.append('workcenter_groups', item));
+  filters.packages.forEach((item) => params.append('packages', item));
+  const effectiveReason = detailReason.value || filters.reason;
+  if (effectiveReason) {
+    params.append('reasons', effectiveReason);
+  }
+
+  window.location.href = `/api/reject-history/export?${params.toString()}`;
+}
+
+const totalScrapQty = computed(() => {
+  return Number(summary.value.REJECT_TOTAL_QTY || 0) + Number(summary.value.DEFECT_QTY || 0);
+});
+
+const activeFilterChips = computed(() => {
+  const chips = [
+    {
+      key: 'date-range',
+      label: `日期: ${filters.startDate || '-'} ~ ${filters.endDate || '-'}`,
+      removable: false,
+      type: 'date',
+      value: '',
+    },
+    {
+      key: 'policy-mode',
+      label: filters.includeExcludedScrap ? '政策: 納入不計良率報廢' : '政策: 排除不計良率報廢',
+      removable: false,
+      type: 'policy',
+      value: '',
+    },
+    {
+      key: 'material-policy-mode',
+      label: filters.excludeMaterialScrap ? '原物料: 已排除' : '原物料: 已納入',
+      removable: false,
+      type: 'policy',
+      value: '',
+    },
+  ];
+
+  if (filters.reason) {
+    chips.push({
+      key: `reason:${filters.reason}`,
+      label: `原因: ${filters.reason}`,
+      removable: true,
+      type: 'reason',
+      value: filters.reason,
+    });
+  }
+  if (detailReason.value) {
+    chips.push({
+      key: `detail-reason:${detailReason.value}`,
+      label: `明細原因: ${detailReason.value}`,
+      removable: true,
+      type: 'detail-reason',
+      value: detailReason.value,
+    });
+  }
+
+  filters.workcenterGroups.forEach((group) => {
+    chips.push({
+      key: `workcenter:${group}`,
+      label: `WC: ${group}`,
+      removable: true,
+      type: 'workcenter',
+      value: group,
+    });
+  });
+
+  filters.packages.forEach((pkg) => {
+    chips.push({
+      key: `package:${pkg}`,
+      label: `Package: ${pkg}`,
+      removable: true,
+      type: 'package',
+      value: pkg,
+    });
+  });
+
+  return chips;
+});
+
+const kpiCards = computed(() => {
+  return [
+    { key: 'REJECT_TOTAL_QTY', label: '扣帳報廢量', value: summary.value.REJECT_TOTAL_QTY, lane: 'reject', isPct: false },
+    { key: 'DEFECT_QTY', label: '不扣帳報廢量', value: summary.value.DEFECT_QTY, lane: 'defect', isPct: false },
+    { key: 'TOTAL_SCRAP_QTY', label: '總報廢量', value: totalScrapQty.value, lane: 'neutral', isPct: false },
+    { key: 'REJECT_SHARE_PCT', label: '扣帳占比', value: summary.value.REJECT_SHARE_PCT, lane: 'neutral', isPct: true },
+    { key: 'AFFECTED_LOT_COUNT', label: '受影響 LOT', value: summary.value.AFFECTED_LOT_COUNT, lane: 'neutral', isPct: false },
+    { key: 'AFFECTED_WORKORDER_COUNT', label: '受影響工單', value: summary.value.AFFECTED_WORKORDER_COUNT, lane: 'neutral', isPct: false },
+  ];
+});
+
+const quantityChartOption = computed(() => {
+  const items = Array.isArray(trend.value?.items) ? trend.value.items : [];
+  return {
+    tooltip: {
+      trigger: 'axis',
+      axisPointer: { type: 'cross' },
+    },
+    legend: {
+      data: ['扣帳報廢量', '不扣帳報廢量'],
+      bottom: 0,
+    },
+    grid: { left: 48, right: 24, top: 22, bottom: 70 },
+    xAxis: {
+      type: 'category',
+      data: items.map((item) => item.bucket_date || ''),
+    },
+    yAxis: {
+      type: 'value',
+      axisLabel: {
+        formatter(value) {
+          return Number(value || 0).toLocaleString('zh-TW');
+        },
+      },
+    },
+    series: [
+      {
+        name: '扣帳報廢量',
+        type: 'bar',
+        data: items.map((item) => Number(item.REJECT_TOTAL_QTY || 0)),
+        itemStyle: { color: '#dc2626' },
+        barMaxWidth: 28,
+      },
+      {
+        name: '不扣帳報廢量',
+        type: 'bar',
+        data: items.map((item) => Number(item.DEFECT_QTY || 0)),
+        itemStyle: { color: '#0284c7' },
+        barMaxWidth: 28,
+      },
+    ],
+  };
+});
+
+const paretoChartOption = computed(() => {
+  const items = Array.isArray(pareto.value?.items) ? pareto.value.items : [];
+  return {
+    tooltip: {
+      trigger: 'axis',
+      axisPointer: { type: 'cross' },
+      formatter(params) {
+        const idx = Number(params?.[0]?.dataIndex || 0);
+        const item = items[idx] || {};
+        return [
+          `<b>${item.reason || '(未填寫)'}</b>`,
+          `報廢量: ${formatNumber(item.metric_value || 0)}`,
+          `占比: ${Number(item.pct || 0).toFixed(2)}%`,
+          `累計: ${Number(item.cumPct || 0).toFixed(2)}%`,
+        ].join('<br/>');
+      },
+    },
+    legend: {
+      data: ['報廢量', '累積%'],
+      bottom: 0,
+    },
+    grid: {
+      left: 52,
+      right: 52,
+      top: 20,
+      bottom: 96,
+    },
+    xAxis: {
+      type: 'category',
+      data: items.map((item) => item.reason || '(未填寫)'),
+      axisLabel: {
+        interval: 0,
+        rotate: items.length > 6 ? 35 : 0,
+        fontSize: 11,
+        overflow: 'truncate',
+        width: 100,
+      },
+    },
+    yAxis: [
+      {
+        type: 'value',
+        name: '量',
+      },
+      {
+        type: 'value',
+        name: '%',
+        min: 0,
+        max: 100,
+        axisLabel: { formatter: '{value}%' },
+      },
+    ],
+    series: [
+      {
+        name: '報廢量',
+        type: 'bar',
+        data: items.map((item) => Number(item.metric_value || 0)),
+        barMaxWidth: 34,
+        itemStyle: {
+          color(params) {
+            const reason = items[params.dataIndex]?.reason || '';
+            return reason === detailReason.value ? '#b91c1c' : '#2563eb';
+          },
+          borderRadius: [4, 4, 0, 0],
+        },
+      },
+      {
+        name: '累積%',
+        type: 'line',
+        yAxisIndex: 1,
+        data: items.map((item) => Number(item.cumPct || 0)),
+        lineStyle: { color: '#f59e0b', width: 2 },
+        itemStyle: { color: '#f59e0b' },
+        symbolSize: 6,
+      },
+    ],
+  };
+});
+
+function onParetoChartClick(params) {
+  if (params?.seriesType !== 'bar') {
+    return;
+  }
+  const selected = pareto.value?.items?.[params.dataIndex]?.reason;
+  onParetoClick(selected);
+}
+
+const pagination = computed(() => detail.value?.pagination || {
+  page: 1,
+  perPage: DEFAULT_PER_PAGE,
+  total: 0,
+  totalPages: 1,
+});
+
+const hasTrendData = computed(() => Array.isArray(trend.value?.items) && trend.value.items.length > 0);
+const hasParetoData = computed(() => Array.isArray(pareto.value?.items) && pareto.value.items.length > 0);
+
+onMounted(() => {
+  setDefaultDateRange();
+  restoreFromUrl();
+  void loadAllData({ loadOptions: true });
+});
+</script>
+
+<template>
+  <div class="dashboard reject-history-page">
+    <header class="header reject-history-header">
+      <div class="header-left">
+        <h1>報廢歷史查詢</h1>
+      </div>
+      <div class="header-right">
+        <div class="last-update" v-if="lastQueryAt">更新時間：{{ lastQueryAt }}</div>
+      </div>
+    </header>
+
+    <div v-if="errorMessage" class="error-banner">{{ errorMessage }}</div>
+
+    <section class="card">
+      <div class="card-header">
+        <div class="card-title">查詢條件</div>
+      </div>
+      <div class="card-body filter-panel">
+        <div class="filter-group">
+          <label class="filter-label" for="start-date">開始日期</label>
+          <input id="start-date" v-model="filters.startDate" type="date" class="filter-input" />
+        </div>
+        <div class="filter-group">
+          <label class="filter-label" for="end-date">結束日期</label>
+          <input id="end-date" v-model="filters.endDate" type="date" class="filter-input" />
+        </div>
+
+        <div class="filter-group">
+          <label class="filter-label">Package</label>
+          <MultiSelect
+            :model-value="filters.packages"
+            :options="options.packages"
+            placeholder="全部 Package"
+            searchable
+            @update:model-value="filters.packages = $event"
+          />
+        </div>
+
+        <div class="filter-group filter-group-wide">
+          <label class="filter-label">WORKCENTER GROUP</label>
+          <MultiSelect
+            :model-value="filters.workcenterGroups"
+            :options="options.workcenterGroups"
+            placeholder="全部工作中心群組"
+            searchable
+            @update:model-value="filters.workcenterGroups = $event"
+          />
+        </div>
+
+        <div class="filter-group filter-group-wide">
+          <label class="filter-label" for="reason">報廢原因</label>
+          <select id="reason" v-model="filters.reason" class="filter-input">
+            <option value="">全部原因</option>
+            <option v-for="reason in options.reasons" :key="reason" :value="reason">
+              {{ reason }}
+            </option>
+          </select>
+        </div>
+
+        <div class="filter-group filter-group-wide inline-toggle-group">
+          <div class="checkbox-row">
+            <label class="checkbox-pill">
+              <input v-model="filters.includeExcludedScrap" type="checkbox" />
+              納入不計良率報廢
+            </label>
+            <label class="checkbox-pill">
+              <input v-model="filters.excludeMaterialScrap" type="checkbox" />
+              排除原物料報廢
+            </label>
+            <label class="checkbox-pill">
+              <input
+                :checked="filters.paretoTop80"
+                type="checkbox"
+                @change="handleParetoScopeToggle($event.target.checked)"
+              />
+              Pareto 僅顯示累計前 80%
+            </label>
+          </div>
+        </div>
+
+        <div class="filter-actions">
+          <button class="btn btn-primary" :disabled="loading.querying" @click="applyFilters">查詢</button>
+          <button class="btn btn-secondary" :disabled="loading.querying" @click="clearFilters">清除條件</button>
+          <button class="btn btn-light btn-export" :disabled="loading.querying" @click="exportCsv">匯出 CSV</button>
+        </div>
+      </div>
+      <div class="card-body active-filter-chip-row" v-if="activeFilterChips.length > 0">
+        <div class="filter-label">套用中篩選</div>
+        <div class="chip-list">
+          <div v-for="chip in activeFilterChips" :key="chip.key" class="filter-chip">
+            <span>{{ chip.label }}</span>
+            <button
+              v-if="chip.removable"
+              type="button"
+              class="chip-remove"
+              @click="removeFilterChip(chip)"
+            >
+              ×
+            </button>
+          </div>
+        </div>
+      </div>
+    </section>
+
+    <section class="summary-row reject-summary-row">
+      <article
+        v-for="card in kpiCards"
+        :key="card.key"
+        class="summary-card"
+        :class="`lane-${card.lane}`"
+      >
+        <div class="summary-label">{{ card.label }}</div>
+        <div class="summary-value small">{{ card.isPct ? formatPct(card.value) : formatNumber(card.value) }}</div>
+      </article>
+    </section>
+
+    <section class="chart-grid">
+      <article class="card">
+        <div class="card-header"><div class="card-title">報廢量趨勢</div></div>
+        <div class="card-body chart-wrap">
+          <VChart :option="quantityChartOption" autoresize />
+          <div v-if="!hasTrendData && !loading.querying" class="placeholder chart-empty">No data</div>
+        </div>
+      </article>
+    </section>
+
+    <section class="card">
+      <div class="card-header pareto-header">
+        <div class="card-title">報廢量 vs 報廢原因（Pareto）</div>
+      </div>
+      <div class="card-body pareto-layout">
+        <div class="pareto-chart-wrap">
+          <VChart :option="paretoChartOption" autoresize @click="onParetoChartClick" />
+          <div v-if="!hasParetoData && !loading.pareto" class="placeholder chart-empty">No data</div>
+        </div>
+        <div class="pareto-table-wrap">
+          <table class="detail-table pareto-table">
+            <thead>
+              <tr>
+                <th>原因</th>
+                <th>報廢量</th>
+                <th>占比</th>
+                <th>累積</th>
+              </tr>
+            </thead>
+            <tbody>
+              <tr
+                v-for="item in pareto.items"
+                :key="item.reason"
+                :class="{ active: detailReason === item.reason }"
+              >
+                <td>
+                  <button class="reason-link" type="button" @click="onParetoClick(item.reason)">
+                    {{ item.reason }}
+                  </button>
+                </td>
+                <td>{{ formatNumber(item.metric_value) }}</td>
+                <td>{{ formatPct(item.pct) }}</td>
+                <td>{{ formatPct(item.cumPct) }}</td>
+              </tr>
+              <tr v-if="!pareto.items || pareto.items.length === 0">
+                <td colspan="4" class="placeholder">No data</td>
+              </tr>
+            </tbody>
+          </table>
+        </div>
+      </div>
+    </section>
+
+    <section class="card">
+      <div class="card-header">
+        <div class="card-title">明細列表</div>
+      </div>
+      <div class="card-body detail-table-wrap">
+        <table class="detail-table">
+          <thead>
+            <tr>
+              <th>日期</th>
+              <th>WORKCENTER_GROUP</th>
+              <th>WORKCENTER</th>
+              <th>Package</th>
+              <th>原因</th>
+              <th>REJECT_TOTAL_QTY</th>
+              <th>DEFECT_QTY</th>
+              <th>REJECT_QTY</th>
+              <th>STANDBY_QTY</th>
+              <th>QTYTOPROCESS_QTY</th>
+              <th>INPROCESS_QTY</th>
+              <th>PROCESSED_QTY</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr v-for="row in detail.items" :key="`${row.TXN_DAY}-${row.WORKCENTERNAME}-${row.LOSSREASONNAME}`">
+              <td>{{ row.TXN_DAY }}</td>
+              <td>{{ row.WORKCENTER_GROUP }}</td>
+              <td>{{ row.WORKCENTERNAME }}</td>
+              <td>{{ row.PRODUCTLINENAME }}</td>
+              <td>{{ row.LOSSREASONNAME }}</td>
+              <td>{{ formatNumber(row.REJECT_TOTAL_QTY) }}</td>
+              <td>{{ formatNumber(row.DEFECT_QTY) }}</td>
+              <td>{{ formatNumber(row.REJECT_QTY) }}</td>
+              <td>{{ formatNumber(row.STANDBY_QTY) }}</td>
+              <td>{{ formatNumber(row.QTYTOPROCESS_QTY) }}</td>
+              <td>{{ formatNumber(row.INPROCESS_QTY) }}</td>
+              <td>{{ formatNumber(row.PROCESSED_QTY) }}</td>
+            </tr>
+            <tr v-if="!detail.items || detail.items.length === 0">
+              <td colspan="12" class="placeholder">No data</td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
+      <div class="pagination">
+        <button :disabled="pagination.page <= 1 || loading.list" @click="goToPage(pagination.page - 1)">Prev</button>
+        <span class="page-info">
+          Page {{ pagination.page }} / {{ pagination.totalPages }} · Total {{ formatNumber(pagination.total) }}
+        </span>
+        <button :disabled="pagination.page >= pagination.totalPages || loading.list" @click="goToPage(pagination.page + 1)">Next</button>
+      </div>
+    </section>
+  </div>
+</template>
diff --git a/frontend/src/reject-history/index.html b/frontend/src/reject-history/index.html
new file mode 100644
index 0000000..bdaa38c
--- /dev/null
+++ b/frontend/src/reject-history/index.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="zh-Hant">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>報廢歷史查詢</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="./main.js"></script>
+  </body>
+</html>
diff --git a/frontend/src/reject-history/main.js b/frontend/src/reject-history/main.js
new file mode 100644
index 0000000..badc9a1
--- /dev/null
+++ b/frontend/src/reject-history/main.js
@@ -0,0 +1,7 @@
+import { createApp } from 'vue';
+
+import App from './App.vue';
+import '../wip-shared/styles.css';
+import './style.css';
+
+createApp(App).mount('#app');
diff --git a/frontend/src/reject-history/style.css b/frontend/src/reject-history/style.css
new file mode 100644
index 0000000..917705f
--- /dev/null
+++ b/frontend/src/reject-history/style.css
@@ -0,0 +1,418 @@
+.reject-history-header {
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+}
+
+.card {
+  background: var(--card-bg);
+  border-radius: 10px;
+  box-shadow: var(--shadow);
+  overflow: hidden;
+  margin-bottom: 14px;
+}
+
+.card-header {
+  padding: 14px 18px;
+  border-bottom: 1px solid var(--border);
+  background: #f8fafc;
+}
+
+.card-title {
+  font-size: 15px;
+  font-weight: 700;
+  color: #0f172a;
+}
+
+.card-body {
+  padding: 14px 16px;
+}
+
+.error-banner {
+  margin-bottom: 14px;
+  padding: 10px 12px;
+  border-radius: 6px;
+  background: #fef2f2;
+  color: #991b1b;
+  font-size: 13px;
+}
+
+.filter-panel {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 14px;
+  align-items: end;
+}
+
+.filter-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.filter-group-wide {
+  grid-column: span 2;
+}
+
+.filter-label {
+  font-size: 12px;
+  font-weight: 700;
+  color: #475569;
+}
+
+.filter-input {
+  width: 100%;
+  padding: 8px 10px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  font-size: 13px;
+  background: #fff;
+}
+
+.filter-input:focus {
+  outline: none;
+  border-color: #0ea5e9;
+  box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.18);
+}
+
+.filter-group .multi-select {
+  width: 100%;
+  min-width: 0;
+}
+
+.inline-toggle-group {
+  align-self: center;
+}
+
+.checkbox-row {
+  display: inline-flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 10px;
+}
+
+.checkbox-pill {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  border: 1px solid var(--border);
+  border-radius: 999px;
+  padding: 6px 10px;
+  font-size: 13px;
+  color: #334155;
+  background: #f8fafc;
+}
+
+.checkbox-pill input[type='checkbox'] {
+  margin: 0;
+  width: 14px;
+  height: 14px;
+  accent-color: #2563eb;
+}
+
+.filter-actions {
+  display: flex;
+  gap: 10px;
+  justify-content: flex-end;
+  grid-column: span 2;
+}
+
+.active-filter-chip-row {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  border-top: 1px solid var(--border);
+}
+
+.chip-list {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.filter-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  padding: 5px 10px;
+  border-radius: 999px;
+  border: 1px solid #cbd5e1;
+  background: #f8fafc;
+  font-size: 12px;
+  color: #334155;
+}
+
+.chip-remove {
+  border: 0;
+  background: transparent;
+  color: #475569;
+  cursor: pointer;
+  font-size: 14px;
+  line-height: 1;
+}
+
+.btn-export {
+  background: #0f766e;
+  color: #fff;
+}
+
+.btn-export:hover {
+  background: #0b5e59;
+}
+
+.reject-summary-row {
+  grid-template-columns: repeat(6, minmax(0, 1fr));
+}
+
+.lane-reject {
+  border-top: 3px solid #dc2626;
+}
+
+.lane-defect {
+  border-top: 3px solid #0284c7;
+}
+
+.lane-neutral {
+  border-top: 3px solid #64748b;
+}
+
+.chart-grid {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr);
+  gap: 14px;
+  margin-bottom: 14px;
+}
+
+.chart-wrap,
+.pareto-chart-wrap {
+  height: 340px;
+  position: relative;
+}
+
+.pareto-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 12px;
+}
+
+.pareto-layout {
+  display: grid;
+  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
+  gap: 12px;
+}
+
+.pareto-table-wrap {
+  overflow: auto;
+}
+
+.detail-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 12px;
+}
+
+.detail-table th,
+.detail-table td {
+  border-bottom: 1px solid var(--border);
+  padding: 8px 10px;
+  text-align: left;
+  vertical-align: middle;
+  white-space: nowrap;
+}
+
+.detail-table thead th {
+  position: sticky;
+  top: 0;
+  background: #f8fafc;
+  z-index: 1;
+}
+
+.reason-link {
+  border: none;
+  background: transparent;
+  color: #1d4ed8;
+  cursor: pointer;
+  text-decoration: underline;
+  font-size: 12px;
+}
+
+.pareto-table tbody tr.active {
+  background: #eff6ff;
+}
+
+.detail-table-wrap {
+  overflow: auto;
+}
+
+/* ---- MultiSelect component styles (shared-ui compatible) ---- */
+
+.multi-select {
+  position: relative;
+  min-width: 160px;
+}
+
+.multi-select-trigger {
+  width: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 8px 10px;
+  font-size: 13px;
+  color: #1f2937;
+  background: #ffffff;
+  cursor: pointer;
+}
+
+.multi-select-trigger:disabled {
+  cursor: not-allowed;
+  opacity: 0.7;
+}
+
+.multi-select-text {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  text-align: left;
+}
+
+.multi-select-arrow {
+  color: #64748b;
+  font-size: 11px;
+}
+
+.multi-select-dropdown {
+  position: absolute;
+  top: calc(100% + 4px);
+  left: 0;
+  right: 0;
+  z-index: 20;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: #ffffff;
+  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.14);
+  overflow: hidden;
+}
+
+.multi-select-search {
+  display: block;
+  width: 100%;
+  border: none;
+  border-bottom: 1px solid var(--border);
+  padding: 8px 12px;
+  font-size: 13px;
+  color: #1f2937;
+  outline: none;
+  background: #f8fafc;
+}
+
+.multi-select-search::placeholder {
+  color: #94a3b8;
+}
+
+.multi-select-options {
+  max-height: 250px;
+  overflow-y: auto;
+  padding: 8px 0;
+}
+
+.multi-select-option {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  width: 100%;
+  padding: 6px 12px;
+  border: none;
+  background: transparent;
+  font-size: 13px;
+  color: #334155;
+  cursor: pointer;
+  text-align: left;
+}
+
+.multi-select-option:hover {
+  background: #f8fafc;
+}
+
+.multi-select-option input[type='checkbox'] {
+  margin: 0;
+  width: 14px;
+  height: 14px;
+  accent-color: #2563eb;
+}
+
+.multi-select-empty {
+  padding: 12px;
+  text-align: center;
+  color: #94a3b8;
+  font-size: 13px;
+}
+
+.multi-select-actions {
+  display: flex;
+  gap: 8px;
+  padding: 8px 10px;
+  border-top: 1px solid var(--border);
+  background: #f8fafc;
+}
+
+.btn-sm {
+  padding: 4px 10px;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: #f8fafc;
+  color: var(--text);
+  cursor: pointer;
+  font-size: 12px;
+}
+
+.btn-sm:hover {
+  border-color: #c2d0e0;
+  background: #eef4fb;
+}
+
+@media (max-width: 1400px) {
+  .reject-summary-row {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+}
+
+@media (max-width: 1180px) {
+  .filter-panel {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
+  .filter-group-wide {
+    grid-column: span 2;
+  }
+
+  .filter-actions {
+    grid-column: span 2;
+    justify-content: flex-start;
+  }
+
+  .pareto-layout {
+    grid-template-columns: 1fr;
+  }
+}
+
+@media (max-width: 760px) {
+  .reject-summary-row {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
+  .filter-panel {
+    grid-template-columns: 1fr;
+  }
+
+  .filter-group-wide,
+  .filter-actions {
+    grid-column: span 1;
+  }
+
+  .checkbox-row {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+}
diff --git a/frontend/vite.config.js b/frontend/vite.config.js
index baf4096..8d13109 100644
--- a/frontend/vite.config.js
+++ b/frontend/vite.config.js
@@ -19,6 +19,7 @@ export default defineConfig(({ mode }) => ({
         'hold-detail': resolve(__dirname, 'src/hold-detail/index.html'),
         'hold-overview': resolve(__dirname, 'src/hold-overview/index.html'),
         'hold-history': resolve(__dirname, 'src/hold-history/index.html'),
+        'reject-history': resolve(__dirname, 'src/reject-history/index.html'),
         'resource-status': resolve(__dirname, 'src/resource-status/index.html'),
         'resource-history': resolve(__dirname, 'src/resource-history/index.html'),
         'job-query': resolve(__dirname, 'src/job-query/main.js'),
diff --git a/openspec/changes/reject-history-query-page/.openspec.yaml b/openspec/changes/archive/2026-02-13-reject-history-query-page/.openspec.yaml
similarity index 100%
rename from openspec/changes/reject-history-query-page/.openspec.yaml
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/.openspec.yaml
diff --git a/openspec/changes/reject-history-query-page/design.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/design.md
similarity index 62%
rename from openspec/changes/reject-history-query-page/design.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/design.md
index edde5da..a09440d 100644
--- a/openspec/changes/reject-history-query-page/design.md
+++ b/openspec/changes/archive/2026-02-13-reject-history-query-page/design.md
@@ -1,6 +1,6 @@
 ## Context
 
-目前 `query-tool` 僅提供單點查詢 reject 資訊，沒有針對歷史趨勢、原因分布與績效指標的完整頁面。`DW_MES_LOTREJECTHISTORY` 存在同一 `HISTORYMAINLINEID` 對應多筆原因紀錄的特性，直接彙總 `MOVEINQTY` 會造成分母膨脹，讓報廢率失真。另一方面，現有語意中「reject 五欄合計」與 `DEFECTQTY` 曾被混用，導致跨頁面解讀不一致。
+目前 `query-tool` 僅提供單點查詢 reject 資訊，沒有針對歷史趨勢、原因分布與績效指標的完整頁面。`DW_MES_LOTREJECTHISTORY` 存在同一 `HISTORYMAINLINEID` 對應多筆原因紀錄的特性，直接彙總 `MOVEINQTY` 會造成分母膨脹，讓報廢率失真。另一方面，現有語意中「reject 五欄合計」與 `DEFECTQTY` 曾被混用，導致跨頁面解讀不一致。新增可用資料表 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` 也帶來新政策需求：`ENABLE_FLAG='Y'` 的報廢原因應預設不納入良率計算，並允許使用者切換是否納入。
 
 此變更需要跨越前端（新報表頁）、後端（新 API + service + SQL）、與治理層（route contract、drawer/page registry、coverage test），屬於跨模組整合型設計。
 
@@ -11,6 +11,7 @@
 - 固化兩條指標語義並列：
   - 扣帳報廢 `REJECT_TOTAL_QTY`
   - 不扣帳報廢 `DEFECT_QTY`
+- 將 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE`（`ENABLE_FLAG='Y'`）納入良率排除政策，且提供 UI/API 可切換納入模式。
 - 以事件層級去重 `MOVEIN_QTY`，避免因 `HISTORYMAINLINEID` 多筆造成比率失真。
 - 完整納入現有 pure Vite + portal-shell + route contract 治理流程。
 - 在視覺上清楚區分 reject 與 defect，避免操作端誤判。
@@ -63,12 +64,18 @@
 
 **Visual structure:**
 - Header：漸層標題區，顯示頁名、資料更新時間、語義說明 badge（扣帳/不扣帳）。
-- Filter Card：日期區間 + 維度篩選（站群/站點/產品線/原因），含查詢與清除。
+- Filter Card：至少提供三個核心篩選器並含查詢/清除動作：
+  - 時間篩選（`start_date`/`end_date`）
+  - 原因篩選（`LOSSREASONNAME`）
+  - `WORKCENTER_GROUP` 篩選（沿用既有頁面篩選體驗與資料來源）
 - KPI Row（8 卡）：`MOVEIN_QTY`、`REJECT_TOTAL_QTY`、`DEFECT_QTY`、兩種 rate、`REJECT_SHARE_PCT`、受影響 lot/workorder。
 - Trend Row：
   - 左圖：`REJECT_TOTAL_QTY` vs `DEFECT_QTY`（量）
   - 右圖：`REJECT_RATE_PCT` vs `DEFECT_RATE_PCT`（率）
-- Pareto + Detail：原因 Pareto（支援 metric mode 切換）與可分頁明細表。
+- Pareto + Detail：報廢量 vs 報廢原因 Pareto（支援 metric mode）與可分頁明細表。
+  - Pareto 預設啟用「僅顯示累計前 80%」模式（以目前篩選後資料集計算）。
+  - 提供開關切換完整 Pareto；關閉前 80% 模式時，顯示篩選後的全部原因。
+  - 視覺與互動可參考 `WIP OVER VIEW` 既有 Pareto 呈現方式，保持使用者認知一致。
 
 **Visual semantics:**
 - Reject（扣帳）使用暖色語義（紅/橘系）
@@ -96,21 +103,60 @@
 - 報表是對外分析依據，語義清晰優先於短期縮寫便利。
 - 與 field-name-consistency 治理要求一致。
 
+### D7: 納入「不計良率報廢」政策並提供可切換模式
+
+**Decision:** 以 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` 中 `ENABLE_FLAG='Y'` 為政策清單，預設排除該類報廢於良率相關計算，並新增 `include_excluded_scrap` 參數（預設 `false`）讓使用者可選擇納入。
+
+**Policy scope:**
+- 影響 summary/trend/reason-pareto/list/export 的同一套查詢語義。
+- 預設模式下，標記為排除的報廢原因不進入良率計算；切換納入後，回到完整資料集計算。
+- API 回應 `meta` 顯示目前是否啟用排除政策，前端在 filter 區顯示「納入不計良率報廢」切換開關。
+
+**Why:**
+- 業務規則已明示 `ENABLE_FLAG='Y'` 代表不納入良率計算，應在報表層落地。
+- 提供切換能兼顧日常看板（排除模式）與稽核追查（納入模式）。
+
+**Alternatives considered:**
+- 永久硬排除：簡單但不利追溯與跨單位對帳。
+- 完全不排除：違反既有良率定義。
+
+### D8: 排除清單採「L2 Redis + L1 記憶體」每日全表快取
+
+**Decision:** 新增 `scrap_reason_exclusion_cache` 模組，採現有快取分層模式：Redis 作為跨 worker 共用快取（L2），process memory 作為快速讀取層（L1）；每日全表刷新一次，啟動時先載入。
+
+**Refresh policy:**
+- 啟動時進行首次載入。
+- 每 24 小時刷新一次（可由環境變數覆寫）。
+- Redis 不可用時，自動退化為 in-memory 快取，並在健康檢查/日誌揭露降級狀態。
+
+**Why:**
+- 表筆數小（目前約 36 筆），適合全表快取，不需每次 query join DB。
+- 共享式 Redis 可避免多 gunicorn worker 間資料不一致。
+- 延續專案既有快取策略，降低維運認知成本。
+
+**Alternatives considered:**
+- 僅記憶體快取：實作最簡單，但多 worker 會各自持有版本。
+- 每次即時查表：邏輯單純，但額外增加 Oracle 往返成本。
+
 ## Risks / Trade-offs
 
 - **[基底 SQL 單一來源造成查詢負載偏高]** → 先以日期與維度條件收斂、list/export 加 rate limit，必要時再追加快取或物化。
 - **[使用者沿用舊語意理解 defect]** → UI 顯示語義說明 badge + tooltip，匯出欄位採顯式命名。
 - **[Pareto 指標切換造成理解成本]** → 預設以 `REJECT_TOTAL_QTY` 顯示，並保留清楚的 toggle label。
+- **[報廢原因對應鍵格式不一致]** → 在 service 層加入 reason normalization 規則（trim/大小寫一致化，必要時切取代碼前綴），並在測試覆蓋。
+- **[排除政策切換導致跨報表數值差異爭議]** → API/前端都回傳並顯示 `include_excluded_scrap` 狀態與政策提示文字。
+- **[Redis 不可用導致快取行為不一致]** → 採 L1 fallback，並透過 health/admin 狀態揭露快取降級。
 - **[路由治理漏登記導致 shell 無法導航]** → contract parity test + page_status 驗證列為必做任務。
 - **[明細資料量大造成前端卡頓]** → 後端分頁、預設 `per_page=50`，並避免一次性全量載入。
 
 ## Migration Plan
 
 1. 建立後端 SQL/service/routes（先讓 API 可單獨驗證）。
-2. 建立前端 reject-history 頁面與元件（先接 summary/trend，再接 pareto/list/export）。
-3. 整合 shell 治理資產：`routeContracts`、`nativeModuleRegistry`、`page_status`、Flask page route。
-4. 補齊測試：service、routes、route-contract parity、前端 smoke。
-5. 先以 `dev` 狀態上線到抽屜，完成 UAT 後調整為 `released`。
+2. 建立 `scrap_reason_exclusion_cache`（全表快取 + 每日刷新 + fallback）。
+3. 建立前端 reject-history 頁面與元件（先接 summary/trend，再接 pareto/list/export）。
+4. 整合 shell 治理資產：`routeContracts`、`nativeModuleRegistry`、`page_status`、Flask page route。
+5. 補齊測試：service、routes、cache、route-contract parity、前端 smoke。
+6. 先以 `dev` 狀態上線到抽屜，完成 UAT 後調整為 `released`。
 
 **Rollback strategy:**
 - 將 `/reject-history` 從 page registry 標記為隱藏或 `dev` 並停用導航入口。
diff --git a/openspec/changes/reject-history-query-page/proposal.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/proposal.md
similarity index 76%
rename from openspec/changes/reject-history-query-page/proposal.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/proposal.md
index b9fa7b1..4257f7f 100644
--- a/openspec/changes/reject-history-query-page/proposal.md
+++ b/openspec/changes/archive/2026-02-13-reject-history-query-page/proposal.md
@@ -1,6 +1,6 @@
 ## Why
 
-目前專案僅在 `query-tool` 提供偏即時/點查型的報廢資訊，缺少可追蹤趨勢與績效的「報廢歷史」專用報表。資料評估也顯示 `DW_MES_LOTREJECTHISTORY` 同一 `HISTORYMAINLINEID` 會對應多筆原因紀錄，若直接加總 `MOVEINQTY` 會造成分母重複、報廢率失真；同時既有查詢對 reject/defect 命名語義不一致，容易誤解指標。現在應在既有 portal-shell + Vite + route contract 架構下，建立一個語義明確且可治理的歷史報表頁。
+目前專案僅在 `query-tool` 提供偏即時/點查型的報廢資訊，缺少可追蹤趨勢與績效的「報廢歷史」專用報表。資料評估也顯示 `DW_MES_LOTREJECTHISTORY` 同一 `HISTORYMAINLINEID` 會對應多筆原因紀錄，若直接加總 `MOVEINQTY` 會造成分母重複、報廢率失真；同時既有查詢對 reject/defect 命名語義不一致，容易誤解指標。另 IT 新開放 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE`，其中 `ENABLE_FLAG='Y'` 代表「不納入良率計算」報廢原因，提案需把此政策納入計算流程。現在應在既有 portal-shell + Vite + route contract 架構下，建立一個語義明確且可治理的歷史報表頁。
 
 ## What Changes
 
@@ -10,6 +10,10 @@
   - 扣帳報廢：`REJECT_TOTAL_QTY = REJECTQTY + STANDBYQTY + QTYTOPROCESS + INPROCESSQTY + PROCESSEDQTY`
   - 不扣帳報廢：`DEFECT_QTY = DEFECTQTY`
 - 以事件層級去重規則處理分母（`MOVEIN_QTY` 以 `HISTORYMAINLINEID` 為主鍵去重），避免多原因拆單導致比率失真。
+- 納入 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` 政策（`ENABLE_FLAG='Y'`）：
+  - 預設排除「不納入良率計算」報廢原因
+  - 提供可選開關讓使用者決定是否納入該類報廢
+- 新增排除清單全表快取（每日一次）機制，採共享快取優先策略，降低每次查詢重複讀表成本。
 - 明確定義 UI/API/匯出欄位語義，避免沿用「defect=五欄合計」這類歷史命名混淆，確保報表對外語意一致。
 - 不變更既有 `query-tool` 現有頁面行為與既有 API 回應欄位（此變更先聚焦新頁能力）。
 
@@ -19,6 +23,7 @@
 - `reject-history-page`: 新增報廢歷史查詢頁面，提供篩選、KPI、趨勢、原因分析、明細查詢與匯出。
 - `reject-history-api`: 新增報廢歷史 API 能力與資料聚合邏輯，支援報表層的摘要、趨勢、Pareto、明細資料來源。
 - `reject-metric-semantics`: 新增 reject/defect 指標語義規範，要求五個 reject 欄位合計與 `DEFECTQTY` 必須分開呈現、分開計算、分開命名。
+- `reject-yield-exclusion-policy`: 新增「不納入良率計算」政策能力，依 `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE.ENABLE_FLAG='Y'` 控制預設排除，並支援使用者切換是否納入。
 
 ### Modified Capabilities
 - `unified-shell-route-coverage`: 新增 `/reject-history` 後，路由契約清單與前後端契約對照規則需同步更新。
@@ -35,6 +40,7 @@
 - 後端：
   - 新增 `src/mes_dashboard/routes/reject_history_routes.py`
   - 新增 `src/mes_dashboard/services/reject_history_service.py`
+  - 新增 `src/mes_dashboard/services/scrap_reason_exclusion_cache.py`
   - 新增 `src/mes_dashboard/sql/reject_history/*.sql`
   - 更新 `src/mes_dashboard/routes/__init__.py`
   - 更新 `src/mes_dashboard/app.py`（`/reject-history` 靜態頁 route）
@@ -44,9 +50,11 @@
 - 測試：
   - 新增 `tests/test_reject_history_service.py`
   - 新增 `tests/test_reject_history_routes.py`
+  - 新增 `tests/test_scrap_reason_exclusion_cache.py`
   - 補充 route coverage / contract parity / e2e smoke
 - 資料語義：
   - 報表需同時呈現 `REJECT_TOTAL_QTY`（扣帳報廢）與 `DEFECT_QTY`（不扣帳報廢）
+  - `ENABLE_FLAG='Y'` 報廢原因預設不納入良率計算，且可由使用者選擇改為納入
   - 不以單一欄位混用兩種語義，避免誤判製程損失
 - 依賴：
   - 不新增第三方套件，沿用現有 Flask + Vue + Vite + SQLLoader + QueryBuilder 架構
diff --git a/openspec/changes/reject-history-query-page/specs/field-name-consistency/spec.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/field-name-consistency/spec.md
similarity index 100%
rename from openspec/changes/reject-history-query-page/specs/field-name-consistency/spec.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/specs/field-name-consistency/spec.md
diff --git a/openspec/changes/reject-history-query-page/specs/reject-history-api/spec.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-history-api/spec.md
similarity index 73%
rename from openspec/changes/reject-history-query-page/specs/reject-history-api/spec.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-history-api/spec.md
index 81f2390..0b731d6 100644
--- a/openspec/changes/reject-history-query-page/specs/reject-history-api/spec.md
+++ b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-history-api/spec.md
@@ -19,6 +19,23 @@ The API SHALL provide aggregated summary metrics for the selected filter context
 - **THEN** response SHALL be `{ success: true, data: { ... } }`
 - **THEN** data SHALL include `MOVEIN_QTY`, `REJECT_TOTAL_QTY`, `DEFECT_QTY`, `REJECT_RATE_PCT`, `DEFECT_RATE_PCT`, `REJECT_SHARE_PCT`, `AFFECTED_LOT_COUNT`, and `AFFECTED_WORKORDER_COUNT`
 
+### Requirement: Reject History API SHALL support yield-exclusion policy toggle
+The API SHALL support excluding or including policy-marked scrap reasons through a shared query parameter.
+
+#### Scenario: Default policy mode
+- **WHEN** reject-history endpoints are called without `include_excluded_scrap`
+- **THEN** `include_excluded_scrap` SHALL default to `false`
+- **THEN** rows mapped to `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE.ENABLE_FLAG='Y'` SHALL be excluded from yield-related calculations
+
+#### Scenario: Explicitly include policy-marked scrap
+- **WHEN** `include_excluded_scrap=true` is provided
+- **THEN** policy-marked rows SHALL be included in summary/trend/pareto/list/export calculations
+- **THEN** API response `meta` SHALL include the effective `include_excluded_scrap` value
+
+#### Scenario: Invalid toggle value
+- **WHEN** `include_excluded_scrap` is not parseable as boolean
+- **THEN** the API SHALL return HTTP 400 with a descriptive validation error
+
 ### Requirement: Reject History API SHALL provide trend endpoint
 The API SHALL return time-series trend data for quantity and rate metrics.
 
@@ -76,6 +93,18 @@ The service SHALL load SQL from dedicated files under `src/mes_dashboard/sql/rej
 - **THEN** user-supplied filters SHALL be passed through bind parameters
 - **THEN** user input SHALL NOT be interpolated into SQL strings directly
 
+### Requirement: Reject History API SHALL use cached exclusion-policy source
+The API SHALL read exclusion-policy reasons from cached `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` data instead of querying Oracle on every request.
+
+#### Scenario: Enabled exclusions only
+- **WHEN** exclusion-policy data is loaded
+- **THEN** only rows with `ENABLE_FLAG='Y'` SHALL be treated as active exclusions
+
+#### Scenario: Daily full-table cache refresh
+- **WHEN** exclusion cache is initialized
+- **THEN** the full table SHALL be loaded and refreshed at least once per 24 hours
+- **THEN** Redis SHOULD be used as shared cache when available, with in-memory fallback when unavailable
+
 ### Requirement: Reject History API SHALL apply rate limiting on expensive endpoints
 The API SHALL rate-limit high-cost endpoints to protect Oracle and application resources.
 
diff --git a/openspec/changes/reject-history-query-page/specs/reject-history-page/spec.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-history-page/spec.md
similarity index 75%
rename from openspec/changes/reject-history-query-page/specs/reject-history-page/spec.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-history-page/spec.md
index c71fadc..94332f3 100644
--- a/openspec/changes/reject-history-query-page/specs/reject-history-page/spec.md
+++ b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-history-page/spec.md
@@ -14,6 +14,29 @@ The page SHALL provide a filter area for date range and major production dimensi
 - **WHEN** user clicks "清除條件"
 - **THEN** all filters SHALL reset to defaults and all sections SHALL reload
 
+#### Scenario: Required core filters are present
+- **WHEN** the filter panel is rendered
+- **THEN** it SHALL include `start_date/end_date` time filter controls
+- **THEN** it SHALL include reason filter control
+- **THEN** it SHALL include `WORKCENTER_GROUP` filter control
+
+### Requirement: Reject History page SHALL expose yield-exclusion toggle control
+The page SHALL let users decide whether to include policy-marked scrap in yield calculations.
+
+#### Scenario: Default toggle state
+- **WHEN** the page is first loaded
+- **THEN** "納入不計良率報廢" toggle SHALL default to OFF
+- **THEN** requests SHALL be sent with `include_excluded_scrap=false`
+
+#### Scenario: Toggle affects all sections
+- **WHEN** user turns ON/OFF the toggle and clicks "查詢"
+- **THEN** summary, trend, pareto, and list sections SHALL reload under the selected policy mode
+- **THEN** export action SHALL use the same toggle state
+
+#### Scenario: Policy status visibility
+- **WHEN** data is rendered
+- **THEN** the UI SHALL show a clear badge/text indicating whether policy-marked scrap is currently excluded or included
+
 ### Requirement: Reject History page SHALL present KPI cards with split reject/defect semantics
 The page SHALL display KPI cards that simultaneously show charge-off reject and non-charge-off defect metrics.
 
@@ -49,6 +72,16 @@ The page SHALL provide a Pareto view for loss reasons and support downstream fil
 - **THEN** items SHALL be sorted by selected metric descending
 - **THEN** a cumulative percentage line SHALL be shown
 
+#### Scenario: Default 80% cumulative display mode
+- **WHEN** the page first loads Pareto
+- **THEN** it SHALL default to "only cumulative top 80%" mode
+- **THEN** Pareto SHALL only render categories within the cumulative 80% threshold under current filters
+
+#### Scenario: Full Pareto toggle mode
+- **WHEN** user turns OFF the 80% cumulative display mode
+- **THEN** Pareto SHALL render all categories after applying current filters
+- **THEN** switching mode SHALL NOT reset existing time/reason/workcenter-group filters
+
 #### Scenario: Pareto click filtering
 - **WHEN** user clicks a Pareto bar or row
 - **THEN** the selected reason SHALL become an active filter chip
diff --git a/openspec/changes/reject-history-query-page/specs/reject-metric-semantics/spec.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-metric-semantics/spec.md
similarity index 78%
rename from openspec/changes/reject-history-query-page/specs/reject-metric-semantics/spec.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-metric-semantics/spec.md
index 09f6b21..35dae4e 100644
--- a/openspec/changes/reject-history-query-page/specs/reject-metric-semantics/spec.md
+++ b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/reject-metric-semantics/spec.md
@@ -16,6 +16,21 @@ The system SHALL compute `DEFECT_QTY` only from `DEFECTQTY` and SHALL NOT merge
 - **THEN** `DEFECT_QTY` SHALL be non-zero
 - **THEN** `REJECT_TOTAL_QTY` SHALL remain 0
 
+### Requirement: Yield-exclusion policy SHALL follow ERP exclusion table
+The system SHALL use `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` as the policy source for "not included in yield" scrap reasons.
+
+#### Scenario: Enabled policy rows
+- **WHEN** exclusion policy is evaluated
+- **THEN** only rows with `ENABLE_FLAG='Y'` SHALL be considered exclusion rules
+
+#### Scenario: Default exclusion behavior
+- **WHEN** `include_excluded_scrap=false` (default)
+- **THEN** source rows matching enabled exclusion reasons SHALL be excluded before computing yield-related metrics
+
+#### Scenario: Optional inclusion override
+- **WHEN** `include_excluded_scrap=true`
+- **THEN** the same matched rows SHALL be included back into metric calculations
+
 ### Requirement: Move-in denominator SHALL be deduplicated at event level
 The system SHALL deduplicate `MOVEIN_QTY` by event key before rate calculations.
 
diff --git a/openspec/changes/reject-history-query-page/specs/unified-shell-route-coverage/spec.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/unified-shell-route-coverage/spec.md
similarity index 100%
rename from openspec/changes/reject-history-query-page/specs/unified-shell-route-coverage/spec.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/specs/unified-shell-route-coverage/spec.md
diff --git a/openspec/changes/reject-history-query-page/specs/vue-vite-page-architecture/spec.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/specs/vue-vite-page-architecture/spec.md
similarity index 100%
rename from openspec/changes/reject-history-query-page/specs/vue-vite-page-architecture/spec.md
rename to openspec/changes/archive/2026-02-13-reject-history-query-page/specs/vue-vite-page-architecture/spec.md
diff --git a/openspec/changes/archive/2026-02-13-reject-history-query-page/tasks.md b/openspec/changes/archive/2026-02-13-reject-history-query-page/tasks.md
new file mode 100644
index 0000000..3d849c0
--- /dev/null
+++ b/openspec/changes/archive/2026-02-13-reject-history-query-page/tasks.md
@@ -0,0 +1,60 @@
+## 1. Contract and Skeleton Setup
+
+- [x] 1.1 Create backend blueprint scaffold `src/mes_dashboard/routes/reject_history_routes.py` and register it in `src/mes_dashboard/routes/__init__.py`
+- [x] 1.2 Create service scaffold `src/mes_dashboard/services/reject_history_service.py` with SQL loader helpers
+- [x] 1.3 Create frontend entry scaffold `frontend/src/reject-history/index.html`, `frontend/src/reject-history/main.js`, and `frontend/src/reject-history/App.vue`
+- [x] 1.4 Add Vite input for `reject-history` in `frontend/vite.config.js`
+
+## 2. SQL and Metric Semantics Implementation
+
+- [x] 2.1 Finalize base query `src/mes_dashboard/sql/reject_history/performance_daily.sql` for five-reject-sum + defect separation
+- [x] 2.2 Add API-specific SQL files in `src/mes_dashboard/sql/reject_history/` (summary, trend, reason_pareto, list, export)
+- [x] 2.3 Implement `MOVEIN_QTY` dedupe by `HISTORYMAINLINEID` with deterministic fallback key
+- [x] 2.4 Implement consistent rate calculations (`REJECT_RATE_PCT`, `DEFECT_RATE_PCT`, `REJECT_SHARE_PCT`) with zero-denominator handling
+- [x] 2.5 Integrate `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` policy mapping (`ENABLE_FLAG='Y'`) into reject-history aggregation flow
+- [x] 2.6 Create `src/mes_dashboard/services/scrap_reason_exclusion_cache.py` with daily full-table refresh (Redis preferred + in-memory fallback)
+
+## 3. Backend API Routes
+
+- [x] 3.1 Implement `GET /api/reject-history/summary` with date/filter validation
+- [x] 3.2 Implement `GET /api/reject-history/trend` with `granularity` validation (`day|week|month`)
+- [x] 3.3 Implement `GET /api/reject-history/reason-pareto` with `metric_mode` validation (`reject_total|defect`)
+- [x] 3.4 Implement `GET /api/reject-history/list` with paging bounds and reason/category filters
+- [x] 3.5 Implement `GET /api/reject-history/export` and CSV output contract
+- [x] 3.6 Apply configured rate limiting to list/export endpoints
+- [x] 3.7 Add shared query param `include_excluded_scrap` (default false) and return effective policy mode in response meta
+
+## 4. Frontend Visual and Interaction Implementation
+
+- [x] 4.1 Build page header with title, data timestamp, and semantic badges for charge-off reject vs non-charge-off defect
+- [x] 4.2 Build filter panel with required controls (`start_date/end_date`, reason, `WORKCENTER_GROUP`) plus query/clear actions, and wire it to all API calls
+- [x] 4.3 Implement KPI card row (8 cards) with warm/cool semantic color lanes and zh-TW number formatting
+- [x] 4.4 Implement dual trend charts (quantity trend + rate trend) using ECharts with synchronized date buckets
+- [x] 4.5 Implement reason Pareto chart/table with `metric_mode` switch and cumulative percentage line, referencing WIP OVER VIEW interaction pattern
+- [x] 4.6 Add Pareto mode toggle: default "top cumulative 80%" and optional "show all filtered categories"
+- [x] 4.7 Implement detail table with pagination, active filter chips, and empty/error states
+- [x] 4.8 Implement CSV export action using current filter context
+- [x] 4.9 Add responsive rules so filter/cards/charts/table stay usable on tablet/mobile widths
+- [x] 4.10 Add "納入不計良率報廢" toggle in filter panel and wire to all API calls + export
+
+## 5. Shell and Route Governance Integration
+
+- [x] 5.1 Add `/reject-history` contract entry to `frontend/src/portal-shell/routeContracts.js`
+- [x] 5.2 Add `/reject-history` loader to `frontend/src/portal-shell/nativeModuleRegistry.js`
+- [x] 5.3 Add `/reject-history` page metadata (drawer/order/status) to `data/page_status.json`
+- [x] 5.4 Add Flask page route `/reject-history` using `send_from_directory` with dist fallback HTML
+
+## 6. Tests and Quality Gates
+
+- [x] 6.1 Add service tests in `tests/test_reject_history_service.py` covering formulas, dedupe, and edge cases
+- [x] 6.2 Add route tests in `tests/test_reject_history_routes.py` covering validation, payload shape, and rate-limit behavior
+- [x] 6.3 Add/extend route-contract parity and shell coverage tests for `/reject-history`
+- [x] 6.4 Add frontend smoke/integration test for query flow and major visual sections
+- [x] 6.5 Add exclusion-policy tests (`ENABLE_FLAG` handling, default exclude, include override, cache fallback path)
+
+## 7. Documentation and Rollout
+
+- [x] 7.1 Update implementation notes under `docs/reject_history_performance.md` to match API/UI field names
+- [x] 7.2 Document exclusion-policy behavior and user toggle semantics in reject-history docs
+- [x] 7.3 Document rollout policy (`dev` visibility first, then `released`) and rollback path
+- [x] 7.4 Run end-to-end verification checklist and capture evidence before implementation handoff
diff --git a/openspec/changes/reject-history-query-page/tasks.md b/openspec/changes/reject-history-query-page/tasks.md
deleted file mode 100644
index 6516db2..0000000
--- a/openspec/changes/reject-history-query-page/tasks.md
+++ /dev/null
@@ -1,53 +0,0 @@
-## 1. Contract and Skeleton Setup
-
-- [ ] 1.1 Create backend blueprint scaffold `src/mes_dashboard/routes/reject_history_routes.py` and register it in `src/mes_dashboard/routes/__init__.py`
-- [ ] 1.2 Create service scaffold `src/mes_dashboard/services/reject_history_service.py` with SQL loader helpers
-- [ ] 1.3 Create frontend entry scaffold `frontend/src/reject-history/index.html`, `frontend/src/reject-history/main.js`, and `frontend/src/reject-history/App.vue`
-- [ ] 1.4 Add Vite input for `reject-history` in `frontend/vite.config.js`
-
-## 2. SQL and Metric Semantics Implementation
-
-- [ ] 2.1 Finalize base query `src/mes_dashboard/sql/reject_history/performance_daily.sql` for five-reject-sum + defect separation
-- [ ] 2.2 Add API-specific SQL files in `src/mes_dashboard/sql/reject_history/` (summary, trend, reason_pareto, list, export)
-- [ ] 2.3 Implement `MOVEIN_QTY` dedupe by `HISTORYMAINLINEID` with deterministic fallback key
-- [ ] 2.4 Implement consistent rate calculations (`REJECT_RATE_PCT`, `DEFECT_RATE_PCT`, `REJECT_SHARE_PCT`) with zero-denominator handling
-
-## 3. Backend API Routes
-
-- [ ] 3.1 Implement `GET /api/reject-history/summary` with date/filter validation
-- [ ] 3.2 Implement `GET /api/reject-history/trend` with `granularity` validation (`day|week|month`)
-- [ ] 3.3 Implement `GET /api/reject-history/reason-pareto` with `metric_mode` validation (`reject_total|defect`)
-- [ ] 3.4 Implement `GET /api/reject-history/list` with paging bounds and reason/category filters
-- [ ] 3.5 Implement `GET /api/reject-history/export` and CSV output contract
-- [ ] 3.6 Apply configured rate limiting to list/export endpoints
-
-## 4. Frontend Visual and Interaction Implementation
-
-- [ ] 4.1 Build page header with title, data timestamp, and semantic badges for charge-off reject vs non-charge-off defect
-- [ ] 4.2 Build filter panel (date range + dimensions + query/clear actions) and wire it to all API calls
-- [ ] 4.3 Implement KPI card row (8 cards) with warm/cool semantic color lanes and zh-TW number formatting
-- [ ] 4.4 Implement dual trend charts (quantity trend + rate trend) using ECharts with synchronized date buckets
-- [ ] 4.5 Implement reason Pareto chart/table with `metric_mode` switch and cumulative percentage line
-- [ ] 4.6 Implement detail table with pagination, active filter chips, and empty/error states
-- [ ] 4.7 Implement CSV export action using current filter context
-- [ ] 4.8 Add responsive rules so filter/cards/charts/table stay usable on tablet/mobile widths
-
-## 5. Shell and Route Governance Integration
-
-- [ ] 5.1 Add `/reject-history` contract entry to `frontend/src/portal-shell/routeContracts.js`
-- [ ] 5.2 Add `/reject-history` loader to `frontend/src/portal-shell/nativeModuleRegistry.js`
-- [ ] 5.3 Add `/reject-history` page metadata (drawer/order/status) to `data/page_status.json`
-- [ ] 5.4 Add Flask page route `/reject-history` using `send_from_directory` with dist fallback HTML
-
-## 6. Tests and Quality Gates
-
-- [ ] 6.1 Add service tests in `tests/test_reject_history_service.py` covering formulas, dedupe, and edge cases
-- [ ] 6.2 Add route tests in `tests/test_reject_history_routes.py` covering validation, payload shape, and rate-limit behavior
-- [ ] 6.3 Add/extend route-contract parity and shell coverage tests for `/reject-history`
-- [ ] 6.4 Add frontend smoke/integration test for query flow and major visual sections
-
-## 7. Documentation and Rollout
-
-- [ ] 7.1 Update implementation notes under `docs/reject_history_performance.md` to match API/UI field names
-- [ ] 7.2 Document rollout policy (`dev` visibility first, then `released`) and rollback path
-- [ ] 7.3 Run end-to-end verification checklist and capture evidence before implementation handoff
diff --git a/openspec/specs/field-name-consistency/spec.md b/openspec/specs/field-name-consistency/spec.md
index 7392305..fc08b80 100644
--- a/openspec/specs/field-name-consistency/spec.md
+++ b/openspec/specs/field-name-consistency/spec.md
@@ -1,9 +1,6 @@
 ## Purpose
 Define stable requirements for field-name-consistency.
-
 ## Requirements
-
-
 ### Requirement: UI and Export Fields SHALL Have a Consistent Contract
 The system SHALL define and apply a consistent contract among UI column labels, API keys, and export headers for report/query pages.
 
@@ -14,3 +11,25 @@ The system SHALL define and apply a consistent contract among UI column labels,
 #### Scenario: Resource history field alignment
 - **WHEN** resource history detail table shows KPI columns
 - **THEN** columns required by export semantics (including Availability%) SHALL be present or explicitly mapped
+
+### Requirement: Reject and defect metric names SHALL remain semantically consistent across UI/API/export
+The system SHALL use explicit, stable names for charge-off reject and non-charge-off defect metrics across all output surfaces.
+
+#### Scenario: UI and API key alignment
+- **WHEN** summary/trend/list payloads are rendered on reject-history page
+- **THEN** UI labels for reject metrics SHALL map to `REJECT_TOTAL_QTY` and related reject-rate fields
+- **THEN** UI labels for defect metrics SHALL map to `DEFECT_QTY` and defect-rate fields
+
+#### Scenario: Export header alignment
+- **WHEN** reject-history CSV export is generated
+- **THEN** CSV headers SHALL include both `REJECT_TOTAL_QTY` and `DEFECT_QTY`
+- **THEN** header names SHALL preserve the same semantic meaning as API fields
+
+### Requirement: Reject component columns SHALL be explicitly distinguished from defect columns
+The system SHALL prevent ambiguous naming that collapses reject components and defect into a single term.
+
+#### Scenario: Component and aggregate coexistence
+- **WHEN** detailed records are presented
+- **THEN** reject component fields (`REJECTQTY`, `STANDBYQTY`, `QTYTOPROCESS`, `INPROCESSQTY`, `PROCESSEDQTY`) SHALL be distinguishable from `DEFECT_QTY`
+- **THEN** aggregate `REJECT_TOTAL_QTY` SHALL be clearly identified as component sum, not defect
+
diff --git a/openspec/specs/reject-history-api/spec.md b/openspec/specs/reject-history-api/spec.md
new file mode 100644
index 0000000..0e6d543
--- /dev/null
+++ b/openspec/specs/reject-history-api/spec.md
@@ -0,0 +1,117 @@
+# reject-history-api Specification
+
+## Purpose
+TBD - created by archiving change reject-history-query-page. Update Purpose after archive.
+## Requirements
+### Requirement: Reject History API SHALL validate required query parameters
+The API SHALL validate date parameters and basic paging bounds before executing database work.
+
+#### Scenario: Missing required dates
+- **WHEN** a reject-history endpoint requiring date range is called without `start_date` or `end_date`
+- **THEN** the API SHALL return HTTP 400 with a descriptive validation error
+
+#### Scenario: Invalid date order
+- **WHEN** `end_date` is earlier than `start_date`
+- **THEN** the API SHALL return HTTP 400 and SHALL NOT run SQL queries
+
+### Requirement: Reject History API SHALL provide summary metrics endpoint
+The API SHALL provide aggregated summary metrics for the selected filter context.
+
+#### Scenario: Summary response payload
+- **WHEN** `GET /api/reject-history/summary` is called with valid filters
+- **THEN** response SHALL be `{ success: true, data: { ... } }`
+- **THEN** data SHALL include `MOVEIN_QTY`, `REJECT_TOTAL_QTY`, `DEFECT_QTY`, `REJECT_RATE_PCT`, `DEFECT_RATE_PCT`, `REJECT_SHARE_PCT`, `AFFECTED_LOT_COUNT`, and `AFFECTED_WORKORDER_COUNT`
+
+### Requirement: Reject History API SHALL support yield-exclusion policy toggle
+The API SHALL support excluding or including policy-marked scrap reasons through a shared query parameter.
+
+#### Scenario: Default policy mode
+- **WHEN** reject-history endpoints are called without `include_excluded_scrap`
+- **THEN** `include_excluded_scrap` SHALL default to `false`
+- **THEN** rows mapped to `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE.ENABLE_FLAG='Y'` SHALL be excluded from yield-related calculations
+
+#### Scenario: Explicitly include policy-marked scrap
+- **WHEN** `include_excluded_scrap=true` is provided
+- **THEN** policy-marked rows SHALL be included in summary/trend/pareto/list/export calculations
+- **THEN** API response `meta` SHALL include the effective `include_excluded_scrap` value
+
+#### Scenario: Invalid toggle value
+- **WHEN** `include_excluded_scrap` is not parseable as boolean
+- **THEN** the API SHALL return HTTP 400 with a descriptive validation error
+
+### Requirement: Reject History API SHALL provide trend endpoint
+The API SHALL return time-series trend data for quantity and rate metrics.
+
+#### Scenario: Trend response structure
+- **WHEN** `GET /api/reject-history/trend` is called
+- **THEN** response SHALL be `{ success: true, data: { items: [...] } }`
+- **THEN** each trend item SHALL contain bucket date, `REJECT_TOTAL_QTY`, `DEFECT_QTY`, `REJECT_RATE_PCT`, and `DEFECT_RATE_PCT`
+
+#### Scenario: Trend granularity
+- **WHEN** `granularity` is provided as `day`, `week`, or `month`
+- **THEN** the API SHALL aggregate by the requested granularity
+- **THEN** invalid granularity SHALL return HTTP 400
+
+### Requirement: Reject History API SHALL provide reason Pareto endpoint
+The API SHALL return sorted reason distribution data with cumulative percentages.
+
+#### Scenario: Pareto response payload
+- **WHEN** `GET /api/reject-history/reason-pareto` is called
+- **THEN** each item SHALL include `reason`, `category`, selected metric value, `pct`, and `cumPct`
+- **THEN** items SHALL be sorted descending by selected metric
+
+#### Scenario: Metric mode validation
+- **WHEN** `metric_mode` is provided
+- **THEN** accepted values SHALL be `reject_total` or `defect`
+- **THEN** invalid `metric_mode` SHALL return HTTP 400
+
+### Requirement: Reject History API SHALL provide paginated detail endpoint
+The API SHALL return paginated detailed rows for the selected filter context.
+
+#### Scenario: List response payload
+- **WHEN** `GET /api/reject-history/list?page=1&per_page=50` is called
+- **THEN** response SHALL include `{ items: [...], pagination: { page, perPage, total, totalPages } }`
+- **THEN** each row SHALL include date, process dimensions, reason fields, `MOVEIN_QTY`, `REJECT_TOTAL_QTY`, `DEFECT_QTY`, and reject component columns
+
+#### Scenario: Paging bounds
+- **WHEN** `page < 1`
+- **THEN** page SHALL be treated as 1
+- **WHEN** `per_page > 200`
+- **THEN** `per_page` SHALL be capped at 200
+
+### Requirement: Reject History API SHALL provide CSV export endpoint
+The API SHALL provide CSV export using the same filter and metric semantics as list/query APIs.
+
+#### Scenario: Export payload consistency
+- **WHEN** `GET /api/reject-history/export` is called with valid filters
+- **THEN** CSV headers SHALL include both `REJECT_TOTAL_QTY` and `DEFECT_QTY`
+- **THEN** export rows SHALL follow the same semantic definitions as summary/list endpoints
+
+### Requirement: Reject History API SHALL centralize SQL in reject_history SQL directory
+The service SHALL load SQL from dedicated files under `src/mes_dashboard/sql/reject_history/`.
+
+#### Scenario: SQL file loading
+- **WHEN** reject-history service executes queries
+- **THEN** SQL SHALL be loaded from files in `sql/reject_history`
+- **THEN** user-supplied filters SHALL be passed through bind parameters
+- **THEN** user input SHALL NOT be interpolated into SQL strings directly
+
+### Requirement: Reject History API SHALL use cached exclusion-policy source
+The API SHALL read exclusion-policy reasons from cached `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` data instead of querying Oracle on every request.
+
+#### Scenario: Enabled exclusions only
+- **WHEN** exclusion-policy data is loaded
+- **THEN** only rows with `ENABLE_FLAG='Y'` SHALL be treated as active exclusions
+
+#### Scenario: Daily full-table cache refresh
+- **WHEN** exclusion cache is initialized
+- **THEN** the full table SHALL be loaded and refreshed at least once per 24 hours
+- **THEN** Redis SHOULD be used as shared cache when available, with in-memory fallback when unavailable
+
+### Requirement: Reject History API SHALL apply rate limiting on expensive endpoints
+The API SHALL rate-limit high-cost endpoints to protect Oracle and application resources.
+
+#### Scenario: List and export rate limiting
+- **WHEN** `/api/reject-history/list` or `/api/reject-history/export` receives excessive requests
+- **THEN** configured rate limiting SHALL reject requests beyond the threshold within the time window
+
diff --git a/openspec/specs/reject-history-page/spec.md b/openspec/specs/reject-history-page/spec.md
new file mode 100644
index 0000000..00543d3
--- /dev/null
+++ b/openspec/specs/reject-history-page/spec.md
@@ -0,0 +1,142 @@
+# reject-history-page Specification
+
+## Purpose
+TBD - created by archiving change reject-history-query-page. Update Purpose after archive.
+## Requirements
+### Requirement: Reject History page SHALL provide filterable historical query controls
+The page SHALL provide a filter area for date range and major production dimensions to drive all report sections.
+
+#### Scenario: Default filter values
+- **WHEN** the page is first loaded
+- **THEN** `start_date` and `end_date` SHALL default to a valid recent range
+- **THEN** all other dimension filters SHALL default to empty (no restriction)
+
+#### Scenario: Apply and clear filters
+- **WHEN** user clicks "查詢"
+- **THEN** summary, trend, pareto, and list sections SHALL reload with the same filter set
+- **WHEN** user clicks "清除條件"
+- **THEN** all filters SHALL reset to defaults and all sections SHALL reload
+
+#### Scenario: Required core filters are present
+- **WHEN** the filter panel is rendered
+- **THEN** it SHALL include `start_date/end_date` time filter controls
+- **THEN** it SHALL include reason filter control
+- **THEN** it SHALL include `WORKCENTER_GROUP` filter control
+
+### Requirement: Reject History page SHALL expose yield-exclusion toggle control
+The page SHALL let users decide whether to include policy-marked scrap in yield calculations.
+
+#### Scenario: Default toggle state
+- **WHEN** the page is first loaded
+- **THEN** "納入不計良率報廢" toggle SHALL default to OFF
+- **THEN** requests SHALL be sent with `include_excluded_scrap=false`
+
+#### Scenario: Toggle affects all sections
+- **WHEN** user turns ON/OFF the toggle and clicks "查詢"
+- **THEN** summary, trend, pareto, and list sections SHALL reload under the selected policy mode
+- **THEN** export action SHALL use the same toggle state
+
+#### Scenario: Policy status visibility
+- **WHEN** data is rendered
+- **THEN** the UI SHALL show a clear badge/text indicating whether policy-marked scrap is currently excluded or included
+
+### Requirement: Reject History page SHALL present KPI cards with split reject/defect semantics
+The page SHALL display KPI cards that simultaneously show charge-off reject and non-charge-off defect metrics.
+
+#### Scenario: KPI cards render core metrics
+- **WHEN** summary data is loaded
+- **THEN** cards SHALL include `MOVEIN_QTY`, `REJECT_TOTAL_QTY`, `DEFECT_QTY`, `REJECT_RATE_PCT`, `DEFECT_RATE_PCT`, `REJECT_SHARE_PCT`, `AFFECTED_LOT_COUNT`, and `AFFECTED_WORKORDER_COUNT`
+- **THEN** numbers SHALL use zh-TW formatting
+
+#### Scenario: Visual distinction for semantic lanes
+- **WHEN** KPI cards are rendered
+- **THEN** reject-related cards SHALL use a warm-color visual lane
+- **THEN** defect-related cards SHALL use a cool-color visual lane
+- **THEN** page legend/badge text SHALL explicitly indicate charge-off vs non-charge-off meaning
+
+### Requirement: Reject History page SHALL display quantity and rate trends in separate charts
+The page SHALL show both quantity trend and rate trend to avoid mixing unit scales.
+
+#### Scenario: Quantity trend chart
+- **WHEN** trend data is loaded
+- **THEN** the quantity trend chart SHALL show `REJECT_TOTAL_QTY` and `DEFECT_QTY` over time
+- **THEN** the chart SHALL use a shared X-axis by date bucket
+
+#### Scenario: Rate trend chart
+- **WHEN** trend data is loaded
+- **THEN** the rate trend chart SHALL show `REJECT_RATE_PCT` and `DEFECT_RATE_PCT` over time
+- **THEN** rate values SHALL be displayed as percentages
+
+### Requirement: Reject History page SHALL provide reason Pareto analysis
+The page SHALL provide a Pareto view for loss reasons and support downstream filtering.
+
+#### Scenario: Pareto rendering and ordering
+- **WHEN** reason Pareto data is loaded
+- **THEN** items SHALL be sorted by selected metric descending
+- **THEN** a cumulative percentage line SHALL be shown
+
+#### Scenario: Default 80% cumulative display mode
+- **WHEN** the page first loads Pareto
+- **THEN** it SHALL default to "only cumulative top 80%" mode
+- **THEN** Pareto SHALL only render categories within the cumulative 80% threshold under current filters
+
+#### Scenario: Full Pareto toggle mode
+- **WHEN** user turns OFF the 80% cumulative display mode
+- **THEN** Pareto SHALL render all categories after applying current filters
+- **THEN** switching mode SHALL NOT reset existing time/reason/workcenter-group filters
+
+#### Scenario: Pareto click filtering
+- **WHEN** user clicks a Pareto bar or row
+- **THEN** the selected reason SHALL become an active filter chip
+- **THEN** detail list SHALL reload with that reason
+- **THEN** clicking the same reason again SHALL clear the reason filter
+
+### Requirement: Reject History page SHALL show paginated detail rows
+The page SHALL provide a paginated detail table for investigation and traceability.
+
+#### Scenario: Detail columns
+- **WHEN** list data is loaded
+- **THEN** each row SHALL include date, workcenter group, workcenter, product dimensions, reason/category, `MOVEIN_QTY`, `REJECT_TOTAL_QTY`, `DEFECT_QTY`, and component reject columns
+
+#### Scenario: Pagination behavior
+- **WHEN** total records exceed per-page size
+- **THEN** Prev/Next and page summary SHALL be shown
+- **THEN** changing any filter SHALL reset page to 1
+
+### Requirement: Reject History page SHALL support CSV export from current filter context
+The page SHALL allow users to export records using the exact active filters.
+
+#### Scenario: Export with current filters
+- **WHEN** user clicks "匯出 CSV"
+- **THEN** export request SHALL include the current filter state and active reason filter
+- **THEN** downloaded file SHALL contain both `REJECT_TOTAL_QTY` and `DEFECT_QTY`
+
+### Requirement: Reject History page SHALL provide robust feedback states
+The page SHALL provide loading, empty, and error states without breaking interactions.
+
+#### Scenario: Initial loading
+- **WHEN** first query is running
+- **THEN** a loading overlay or skeleton SHALL be visible until required data sections are ready
+
+#### Scenario: API failure
+- **WHEN** any section API fails
+- **THEN** a visible error banner SHALL be shown
+- **THEN** already loaded sections SHALL remain interactive
+
+#### Scenario: Empty dataset
+- **WHEN** query returns no rows
+- **THEN** chart and table areas SHALL show explicit empty-state messages
+
+### Requirement: Reject History page SHALL maintain responsive visual hierarchy
+The page SHALL keep the same semantic grouping across desktop and mobile layouts.
+
+#### Scenario: Desktop layout
+- **WHEN** viewport is desktop width
+- **THEN** KPI cards SHALL render in multi-column layout
+- **THEN** trend and pareto sections SHALL render as two-column analytical panels
+
+#### Scenario: Mobile layout
+- **WHEN** viewport width is below responsive breakpoint
+- **THEN** cards and chart panels SHALL stack in a single column
+- **THEN** filter controls SHALL remain operable without horizontal overflow
+
diff --git a/openspec/specs/reject-metric-semantics/spec.md b/openspec/specs/reject-metric-semantics/spec.md
new file mode 100644
index 0000000..11bf54e
--- /dev/null
+++ b/openspec/specs/reject-metric-semantics/spec.md
@@ -0,0 +1,77 @@
+# reject-metric-semantics Specification
+
+## Purpose
+TBD - created by archiving change reject-history-query-page. Update Purpose after archive.
+## Requirements
+### Requirement: Charge-off reject metric SHALL be computed from five reject component columns
+The system SHALL compute `REJECT_TOTAL_QTY` as the sum of five reject-related quantity columns.
+
+#### Scenario: Reject total formula
+- **WHEN** a source record is transformed
+- **THEN** `REJECT_TOTAL_QTY` SHALL equal `REJECTQTY + STANDBYQTY + QTYTOPROCESS + INPROCESSQTY + PROCESSEDQTY`
+- **THEN** null component values SHALL be treated as zero
+
+### Requirement: Defect metric SHALL remain independent from reject total
+The system SHALL compute `DEFECT_QTY` only from `DEFECTQTY` and SHALL NOT merge it into `REJECT_TOTAL_QTY`.
+
+#### Scenario: Defect independence
+- **WHEN** a record has `DEFECTQTY > 0` and reject component sum equals 0
+- **THEN** `DEFECT_QTY` SHALL be non-zero
+- **THEN** `REJECT_TOTAL_QTY` SHALL remain 0
+
+### Requirement: Yield-exclusion policy SHALL follow ERP exclusion table
+The system SHALL use `ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE` as the policy source for "not included in yield" scrap reasons.
+
+#### Scenario: Enabled policy rows
+- **WHEN** exclusion policy is evaluated
+- **THEN** only rows with `ENABLE_FLAG='Y'` SHALL be considered exclusion rules
+
+#### Scenario: Default exclusion behavior
+- **WHEN** `include_excluded_scrap=false` (default)
+- **THEN** source rows matching enabled exclusion reasons SHALL be excluded before computing yield-related metrics
+
+#### Scenario: Optional inclusion override
+- **WHEN** `include_excluded_scrap=true`
+- **THEN** the same matched rows SHALL be included back into metric calculations
+
+### Requirement: Move-in denominator SHALL be deduplicated at event level
+The system SHALL deduplicate `MOVEIN_QTY` by event key before rate calculations.
+
+#### Scenario: Primary dedupe key
+- **WHEN** `HISTORYMAINLINEID` is present
+- **THEN** only one row per `HISTORYMAINLINEID` SHALL contribute `MOVEIN_QTY`
+
+#### Scenario: Fallback dedupe key
+- **WHEN** `HISTORYMAINLINEID` is missing
+- **THEN** fallback dedupe key SHALL use a deterministic composite key from transaction context
+
+### Requirement: Reject and defect rates SHALL use the same deduplicated denominator
+The system SHALL calculate percentage rates from deduplicated `MOVEIN_QTY` to ensure comparability.
+
+#### Scenario: Reject rate formula
+- **WHEN** `MOVEIN_QTY > 0`
+- **THEN** `REJECT_RATE_PCT` SHALL equal `REJECT_TOTAL_QTY / MOVEIN_QTY * 100`
+
+#### Scenario: Defect rate formula
+- **WHEN** `MOVEIN_QTY > 0`
+- **THEN** `DEFECT_RATE_PCT` SHALL equal `DEFECT_QTY / MOVEIN_QTY * 100`
+
+#### Scenario: Zero denominator handling
+- **WHEN** `MOVEIN_QTY = 0`
+- **THEN** both rate fields SHALL return 0 and SHALL NOT raise divide-by-zero errors
+
+### Requirement: Reject share SHALL describe reject proportion within total loss
+The system SHALL calculate reject share against combined reject and defect loss quantities.
+
+#### Scenario: Reject share formula
+- **WHEN** `REJECT_TOTAL_QTY + DEFECT_QTY > 0`
+- **THEN** `REJECT_SHARE_PCT` SHALL equal `REJECT_TOTAL_QTY / (REJECT_TOTAL_QTY + DEFECT_QTY) * 100`
+
+### Requirement: Metric naming SHALL preserve semantic meaning across transformations
+The system SHALL keep explicit names for charge-off reject and non-charge-off defect metrics.
+
+#### Scenario: No ambiguous remapping
+- **WHEN** service or export fields are generated
+- **THEN** `REJECT_TOTAL_QTY` SHALL NOT be renamed to `DEFECT_QTY`
+- **THEN** `DEFECT_QTY` SHALL refer only to `DEFECTQTY`
+
diff --git a/openspec/specs/unified-shell-route-coverage/spec.md b/openspec/specs/unified-shell-route-coverage/spec.md
index 817029b..27cb2ec 100644
--- a/openspec/specs/unified-shell-route-coverage/spec.md
+++ b/openspec/specs/unified-shell-route-coverage/spec.md
@@ -45,3 +45,27 @@ When contract loading falls back from the primary modernization contract artifac
 #### Scenario: Legacy contract fallback path selected
 - **WHEN** the primary contract artifact is unavailable and a legacy contract file is loaded
 - **THEN** the system SHALL log a warning that includes the selected legacy source path
+
+### Requirement: Reject History route SHALL be included in governed shell route inventory
+The `/reject-history` route SHALL be represented in shell route contracts with complete governance metadata.
+
+#### Scenario: Frontend route contract entry
+- **WHEN** route contract validation runs against `frontend/src/portal-shell/routeContracts.js`
+- **THEN** `/reject-history` SHALL exist with route id, title, owner, render mode, visibility policy, scope, and compatibility policy
+
+#### Scenario: Native loader coverage
+- **WHEN** native module loader registry is validated
+- **THEN** `/reject-history` SHALL be resolvable in `nativeModuleRegistry`
+
+### Requirement: Reject History governance metadata SHALL be parity-validated across sources
+Shell governance checks SHALL enforce parity for `/reject-history` between frontend and backend contract inventories.
+
+#### Scenario: Contract parity for reject-history route
+- **WHEN** contract parity checks execute
+- **THEN** frontend and backend route inventories SHALL both include `/reject-history`
+- **THEN** metadata mismatch or missing route SHALL fail governance checks
+
+#### Scenario: Navigation visibility governance
+- **WHEN** page status/navigation config is evaluated
+- **THEN** `/reject-history` SHALL have governed drawer assignment and ordering metadata
+
diff --git a/openspec/specs/vue-vite-page-architecture/spec.md b/openspec/specs/vue-vite-page-architecture/spec.md
index 788176b..fd0618b 100644
--- a/openspec/specs/vue-vite-page-architecture/spec.md
+++ b/openspec/specs/vue-vite-page-architecture/spec.md
@@ -137,3 +137,42 @@ The mid-section defect page SHALL use `AbortController` to cancel in-flight API
 - **THEN** the query SHALL NOT be cancelled by the pagination request
 - **THEN** the pagination SHALL use a separate abort key from the query
 
+### Requirement: Reject History page SHALL be a pure Vite HTML entry
+The reject-history page SHALL be built from an HTML entry and emitted as static dist assets.
+
+#### Scenario: Vite entry registration
+- **WHEN** Vite config inputs are evaluated
+- **THEN** `reject-history` SHALL map to `frontend/src/reject-history/index.html`
+
+#### Scenario: Build output artifacts
+- **WHEN** `vite build` completes
+- **THEN** output SHALL include `reject-history.html`, `reject-history.js`, and `reject-history.css` in `static/dist/`
+
+### Requirement: Reject History route SHALL serve static dist HTML
+The Flask route for `/reject-history` SHALL serve pre-built static HTML through `send_from_directory`.
+
+#### Scenario: Static page serving
+- **WHEN** user navigates to `/reject-history`
+- **THEN** Flask SHALL serve `static/dist/reject-history.html` when the file exists
+- **THEN** HTML SHALL NOT be rendered through Jinja template interpolation
+
+#### Scenario: Dist fallback response
+- **WHEN** `reject-history.html` is missing in dist
+- **THEN** route SHALL return a minimal fallback HTML that still references `/static/dist/reject-history.js`
+
+### Requirement: Reject History shell integration SHALL use native module loading
+The page SHALL integrate with portal-shell native module loading policy.
+
+#### Scenario: Native module registration
+- **WHEN** shell resolves a route component for `/reject-history`
+- **THEN** it SHALL dynamically import `frontend/src/reject-history/App.vue`
+- **THEN** the route style bundle SHALL be loaded via registered style loaders
+
+### Requirement: Reject History page SHALL call APIs through shared core API module
+The page SHALL call backend APIs via `frontend/src/core/api.js` without legacy global dependencies.
+
+#### Scenario: API call path
+- **WHEN** reject-history page executes GET or export requests
+- **THEN** requests SHALL use shared API utilities (`apiGet`/equivalent)
+- **THEN** page behavior SHALL NOT depend on `window.MesApi`
+
diff --git a/src/mes_dashboard/app.py b/src/mes_dashboard/app.py
index d223841..028a9c9 100644
--- a/src/mes_dashboard/app.py
+++ b/src/mes_dashboard/app.py
@@ -44,6 +44,10 @@ from mes_dashboard.services.realtime_equipment_cache import (
     init_realtime_equipment_cache,
     stop_equipment_status_sync_worker,
 )
+from mes_dashboard.services.scrap_reason_exclusion_cache import (
+    init_scrap_reason_exclusion_cache,
+    stop_scrap_reason_exclusion_cache_worker,
+)
 from mes_dashboard.core.modernization_policy import (
     get_deferred_routes as get_deferred_routes_from_scope_matrix,
     get_missing_in_scope_assets,
@@ -286,6 +290,11 @@ def _shutdown_runtime_resources() -> None:
     except Exception as exc:
         logger.warning("Error stopping equipment sync worker: %s", exc)
 
+    try:
+        stop_scrap_reason_exclusion_cache_worker()
+    except Exception as exc:
+        logger.warning("Error stopping scrap exclusion cache worker: %s", exc)
+
     try:
         close_redis()
     except Exception as exc:
@@ -380,6 +389,7 @@ def create_app(config_name: str | None = None) -> Flask:
             start_keepalive()  # Keep database connections alive
             start_cache_updater()  # Start Redis cache updater
             init_realtime_equipment_cache(app)  # Start realtime equipment status cache
+            init_scrap_reason_exclusion_cache(app)  # Start exclusion-policy cache sync
     _register_shutdown_hooks(app)
 
     # Register API routes
@@ -796,6 +806,27 @@ def create_app(config_name: str | None = None) -> Flask:
             200,
         ))
 
+    @app.route('/reject-history')
+    def reject_history_page():
+        """Reject history analysis page served as pure Vite HTML output."""
+        canonical_redirect = maybe_redirect_to_canonical_shell('/reject-history')
+        if canonical_redirect is not None:
+            return canonical_redirect
+
+        dist_dir = os.path.join(app.static_folder or "", "dist")
+        dist_html = os.path.join(dist_dir, "reject-history.html")
+        if os.path.exists(dist_html):
+            return send_from_directory(dist_dir, 'reject-history.html')
+
+        return missing_in_scope_asset_response('/reject-history', (
+            "<!doctype html><html lang=\"zh-Hant\"><head><meta charset=\"UTF-8\">"
+            "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">"
+            "<title>報廢歷史查詢</title>"
+            "<script type=\"module\" src=\"/static/dist/reject-history.js\"></script>"
+            "</head><body><div id='app'></div></body></html>",
+            200,
+        ))
+
     @app.route('/tmtt-defect')
     def tmtt_defect_page():
         """TMTT printing & lead form defect analysis page."""
diff --git a/src/mes_dashboard/routes/__init__.py b/src/mes_dashboard/routes/__init__.py
index 60446c6..44d46f4 100644
--- a/src/mes_dashboard/routes/__init__.py
+++ b/src/mes_dashboard/routes/__init__.py
@@ -20,6 +20,7 @@ from .tmtt_defect_routes import tmtt_defect_bp
 from .qc_gate_routes import qc_gate_bp
 from .mid_section_defect_routes import mid_section_defect_bp
 from .trace_routes import trace_bp
+from .reject_history_routes import reject_history_bp
 
 
 def register_routes(app) -> None:
@@ -38,6 +39,7 @@ def register_routes(app) -> None:
     app.register_blueprint(qc_gate_bp)
     app.register_blueprint(mid_section_defect_bp)
     app.register_blueprint(trace_bp)
+    app.register_blueprint(reject_history_bp)
 
 __all__ = [
     'wip_bp',
@@ -56,5 +58,6 @@ __all__ = [
     'qc_gate_bp',
     'mid_section_defect_bp',
     'trace_bp',
+    'reject_history_bp',
     'register_routes',
 ]
diff --git a/src/mes_dashboard/routes/reject_history_routes.py b/src/mes_dashboard/routes/reject_history_routes.py
new file mode 100644
index 0000000..072b562
--- /dev/null
+++ b/src/mes_dashboard/routes/reject_history_routes.py
@@ -0,0 +1,358 @@
+# -*- coding: utf-8 -*-
+"""Reject-history page API routes."""
+
+from __future__ import annotations
+
+from datetime import date, timedelta
+from typing import Optional
+
+from flask import Blueprint, Response, jsonify, request
+
+from mes_dashboard.core.rate_limit import configured_rate_limit
+from mes_dashboard.services.reject_history_service import (
+    export_csv,
+    get_filter_options,
+    query_list,
+    query_reason_pareto,
+    query_summary,
+    query_trend,
+)
+
+reject_history_bp = Blueprint("reject_history", __name__)
+
+_REJECT_HISTORY_LIST_RATE_LIMIT = configured_rate_limit(
+    bucket="reject-history-list",
+    max_attempts_env="REJECT_HISTORY_LIST_RATE_LIMIT_MAX_REQUESTS",
+    window_seconds_env="REJECT_HISTORY_LIST_RATE_LIMIT_WINDOW_SECONDS",
+    default_max_attempts=90,
+    default_window_seconds=60,
+)
+
+_REJECT_HISTORY_EXPORT_RATE_LIMIT = configured_rate_limit(
+    bucket="reject-history-export",
+    max_attempts_env="REJECT_HISTORY_EXPORT_RATE_LIMIT_MAX_REQUESTS",
+    window_seconds_env="REJECT_HISTORY_EXPORT_RATE_LIMIT_WINDOW_SECONDS",
+    default_max_attempts=30,
+    default_window_seconds=60,
+)
+
+
+def _default_date_range() -> tuple[str, str]:
+    end = date.today()
+    start = end - timedelta(days=29)
+    return start.strftime("%Y-%m-%d"), end.strftime("%Y-%m-%d")
+
+
+def _parse_date_range(required: bool = True) -> tuple[Optional[str], Optional[str], Optional[tuple[dict, int]]]:
+    start_date = request.args.get("start_date", "").strip()
+    end_date = request.args.get("end_date", "").strip()
+
+    if not start_date or not end_date:
+        if required:
+            return None, None, ({"success": False, "error": "缺少必要參數: start_date, end_date"}, 400)
+        start_date, end_date = _default_date_range()
+
+    return start_date, end_date, None
+
+
+def _parse_bool(value: str, *, name: str) -> tuple[Optional[bool], Optional[tuple[dict, int]]]:
+    normalized = str(value or "").strip().lower()
+    if normalized in {"", "0", "false", "no", "n", "off"}:
+        return False, None
+    if normalized in {"1", "true", "yes", "y", "on"}:
+        return True, None
+    return None, ({"success": False, "error": f"Invalid {name}, use true/false"}, 400)
+
+
+def _parse_multi_param(name: str) -> list[str]:
+    values = []
+    for raw in request.args.getlist(name):
+        for token in str(raw).split(","):
+            item = token.strip()
+            if item:
+                values.append(item)
+    # Deduplicate while preserving order.
+    seen = set()
+    deduped = []
+    for value in values:
+        if value in seen:
+            continue
+        seen.add(value)
+        deduped.append(value)
+    return deduped
+
+
+def _extract_meta(
+    payload: dict,
+    include_excluded_scrap: bool,
+    exclude_material_scrap: bool,
+) -> tuple[dict, dict]:
+    data = dict(payload or {})
+    meta = data.pop("meta", {}) if isinstance(data.get("meta"), dict) else {}
+    meta["include_excluded_scrap"] = bool(include_excluded_scrap)
+    meta["exclude_material_scrap"] = bool(exclude_material_scrap)
+    return data, meta
+
+
+@reject_history_bp.route("/api/reject-history/options", methods=["GET"])
+def api_reject_history_options():
+    start_date, end_date, date_error = _parse_date_range(required=False)
+    if date_error:
+        return jsonify(date_error[0]), date_error[1]
+
+    include_excluded_scrap, bool_error = _parse_bool(
+        request.args.get("include_excluded_scrap", ""),
+        name="include_excluded_scrap",
+    )
+    if bool_error:
+        return jsonify(bool_error[0]), bool_error[1]
+    exclude_material_scrap, material_bool_error = _parse_bool(
+        request.args.get("exclude_material_scrap", "true"),
+        name="exclude_material_scrap",
+    )
+    if material_bool_error:
+        return jsonify(material_bool_error[0]), material_bool_error[1]
+
+    try:
+        result = get_filter_options(
+            start_date=start_date,
+            end_date=end_date,
+            include_excluded_scrap=bool(include_excluded_scrap),
+            exclude_material_scrap=bool(exclude_material_scrap),
+        )
+        data, meta = _extract_meta(
+            result,
+            bool(include_excluded_scrap),
+            bool(exclude_material_scrap),
+        )
+        return jsonify({"success": True, "data": data, "meta": meta})
+    except ValueError as exc:
+        return jsonify({"success": False, "error": str(exc)}), 400
+    except Exception:
+        return jsonify({"success": False, "error": "查詢篩選選項失敗"}), 500
+
+
+@reject_history_bp.route("/api/reject-history/summary", methods=["GET"])
+def api_reject_history_summary():
+    start_date, end_date, date_error = _parse_date_range(required=True)
+    if date_error:
+        return jsonify(date_error[0]), date_error[1]
+
+    include_excluded_scrap, bool_error = _parse_bool(
+        request.args.get("include_excluded_scrap", ""),
+        name="include_excluded_scrap",
+    )
+    if bool_error:
+        return jsonify(bool_error[0]), bool_error[1]
+    exclude_material_scrap, material_bool_error = _parse_bool(
+        request.args.get("exclude_material_scrap", "true"),
+        name="exclude_material_scrap",
+    )
+    if material_bool_error:
+        return jsonify(material_bool_error[0]), material_bool_error[1]
+
+    try:
+        result = query_summary(
+            start_date=start_date,
+            end_date=end_date,
+            workcenter_groups=_parse_multi_param("workcenter_groups") or None,
+            packages=_parse_multi_param("packages") or None,
+            reasons=_parse_multi_param("reasons") or None,
+            categories=_parse_multi_param("categories") or None,
+            include_excluded_scrap=bool(include_excluded_scrap),
+            exclude_material_scrap=bool(exclude_material_scrap),
+        )
+        data, meta = _extract_meta(
+            result,
+            bool(include_excluded_scrap),
+            bool(exclude_material_scrap),
+        )
+        return jsonify({"success": True, "data": data, "meta": meta})
+    except ValueError as exc:
+        return jsonify({"success": False, "error": str(exc)}), 400
+    except Exception:
+        return jsonify({"success": False, "error": "查詢摘要資料失敗"}), 500
+
+
+@reject_history_bp.route("/api/reject-history/trend", methods=["GET"])
+def api_reject_history_trend():
+    start_date, end_date, date_error = _parse_date_range(required=True)
+    if date_error:
+        return jsonify(date_error[0]), date_error[1]
+
+    include_excluded_scrap, bool_error = _parse_bool(
+        request.args.get("include_excluded_scrap", ""),
+        name="include_excluded_scrap",
+    )
+    if bool_error:
+        return jsonify(bool_error[0]), bool_error[1]
+    exclude_material_scrap, material_bool_error = _parse_bool(
+        request.args.get("exclude_material_scrap", "true"),
+        name="exclude_material_scrap",
+    )
+    if material_bool_error:
+        return jsonify(material_bool_error[0]), material_bool_error[1]
+
+    granularity = request.args.get("granularity", "day").strip().lower() or "day"
+    try:
+        result = query_trend(
+            start_date=start_date,
+            end_date=end_date,
+            granularity=granularity,
+            workcenter_groups=_parse_multi_param("workcenter_groups") or None,
+            packages=_parse_multi_param("packages") or None,
+            reasons=_parse_multi_param("reasons") or None,
+            categories=_parse_multi_param("categories") or None,
+            include_excluded_scrap=bool(include_excluded_scrap),
+            exclude_material_scrap=bool(exclude_material_scrap),
+        )
+        data, meta = _extract_meta(
+            result,
+            bool(include_excluded_scrap),
+            bool(exclude_material_scrap),
+        )
+        return jsonify({"success": True, "data": data, "meta": meta})
+    except ValueError as exc:
+        return jsonify({"success": False, "error": str(exc)}), 400
+    except Exception:
+        return jsonify({"success": False, "error": "查詢趨勢資料失敗"}), 500
+
+
+@reject_history_bp.route("/api/reject-history/reason-pareto", methods=["GET"])
+def api_reject_history_reason_pareto():
+    start_date, end_date, date_error = _parse_date_range(required=True)
+    if date_error:
+        return jsonify(date_error[0]), date_error[1]
+
+    include_excluded_scrap, bool_error = _parse_bool(
+        request.args.get("include_excluded_scrap", ""),
+        name="include_excluded_scrap",
+    )
+    if bool_error:
+        return jsonify(bool_error[0]), bool_error[1]
+    exclude_material_scrap, material_bool_error = _parse_bool(
+        request.args.get("exclude_material_scrap", "true"),
+        name="exclude_material_scrap",
+    )
+    if material_bool_error:
+        return jsonify(material_bool_error[0]), material_bool_error[1]
+
+    metric_mode = request.args.get("metric_mode", "reject_total").strip().lower() or "reject_total"
+    pareto_scope = request.args.get("pareto_scope", "top80").strip().lower() or "top80"
+
+    try:
+        result = query_reason_pareto(
+            start_date=start_date,
+            end_date=end_date,
+            metric_mode=metric_mode,
+            pareto_scope=pareto_scope,
+            workcenter_groups=_parse_multi_param("workcenter_groups") or None,
+            packages=_parse_multi_param("packages") or None,
+            reasons=_parse_multi_param("reasons") or None,
+            categories=_parse_multi_param("categories") or None,
+            include_excluded_scrap=bool(include_excluded_scrap),
+            exclude_material_scrap=bool(exclude_material_scrap),
+        )
+        data, meta = _extract_meta(
+            result,
+            bool(include_excluded_scrap),
+            bool(exclude_material_scrap),
+        )
+        return jsonify({"success": True, "data": data, "meta": meta})
+    except ValueError as exc:
+        return jsonify({"success": False, "error": str(exc)}), 400
+    except Exception:
+        return jsonify({"success": False, "error": "查詢柏拉圖資料失敗"}), 500
+
+
+@reject_history_bp.route("/api/reject-history/list", methods=["GET"])
+@_REJECT_HISTORY_LIST_RATE_LIMIT
+def api_reject_history_list():
+    start_date, end_date, date_error = _parse_date_range(required=True)
+    if date_error:
+        return jsonify(date_error[0]), date_error[1]
+
+    include_excluded_scrap, bool_error = _parse_bool(
+        request.args.get("include_excluded_scrap", ""),
+        name="include_excluded_scrap",
+    )
+    if bool_error:
+        return jsonify(bool_error[0]), bool_error[1]
+    exclude_material_scrap, material_bool_error = _parse_bool(
+        request.args.get("exclude_material_scrap", "true"),
+        name="exclude_material_scrap",
+    )
+    if material_bool_error:
+        return jsonify(material_bool_error[0]), material_bool_error[1]
+
+    page = request.args.get("page", 1, type=int) or 1
+    per_page = request.args.get("per_page", 50, type=int) or 50
+
+    try:
+        result = query_list(
+            start_date=start_date,
+            end_date=end_date,
+            page=page,
+            per_page=per_page,
+            workcenter_groups=_parse_multi_param("workcenter_groups") or None,
+            packages=_parse_multi_param("packages") or None,
+            reasons=_parse_multi_param("reasons") or None,
+            categories=_parse_multi_param("categories") or None,
+            include_excluded_scrap=bool(include_excluded_scrap),
+            exclude_material_scrap=bool(exclude_material_scrap),
+        )
+        data, meta = _extract_meta(
+            result,
+            bool(include_excluded_scrap),
+            bool(exclude_material_scrap),
+        )
+        return jsonify({"success": True, "data": data, "meta": meta})
+    except ValueError as exc:
+        return jsonify({"success": False, "error": str(exc)}), 400
+    except Exception:
+        return jsonify({"success": False, "error": "查詢明細資料失敗"}), 500
+
+
+@reject_history_bp.route("/api/reject-history/export", methods=["GET"])
+@_REJECT_HISTORY_EXPORT_RATE_LIMIT
+def api_reject_history_export():
+    start_date, end_date, date_error = _parse_date_range(required=True)
+    if date_error:
+        return jsonify(date_error[0]), date_error[1]
+
+    include_excluded_scrap, bool_error = _parse_bool(
+        request.args.get("include_excluded_scrap", ""),
+        name="include_excluded_scrap",
+    )
+    if bool_error:
+        return jsonify(bool_error[0]), bool_error[1]
+    exclude_material_scrap, material_bool_error = _parse_bool(
+        request.args.get("exclude_material_scrap", "true"),
+        name="exclude_material_scrap",
+    )
+    if material_bool_error:
+        return jsonify(material_bool_error[0]), material_bool_error[1]
+
+    filename = f"reject_history_{start_date}_to_{end_date}.csv"
+    try:
+        return Response(
+            export_csv(
+                start_date=start_date,
+                end_date=end_date,
+                workcenter_groups=_parse_multi_param("workcenter_groups") or None,
+                packages=_parse_multi_param("packages") or None,
+                reasons=_parse_multi_param("reasons") or None,
+                categories=_parse_multi_param("categories") or None,
+                include_excluded_scrap=bool(include_excluded_scrap),
+                exclude_material_scrap=bool(exclude_material_scrap),
+            ),
+            mimetype="text/csv",
+            headers={
+                "Content-Disposition": f"attachment; filename={filename}",
+                "Content-Type": "text/csv; charset=utf-8-sig",
+            },
+        )
+    except ValueError as exc:
+        return jsonify({"success": False, "error": str(exc)}), 400
+    except Exception:
+        return jsonify({"success": False, "error": "匯出 CSV 失敗"}), 500
diff --git a/src/mes_dashboard/services/reject_history_service.py b/src/mes_dashboard/services/reject_history_service.py
new file mode 100644
index 0000000..7233b35
--- /dev/null
+++ b/src/mes_dashboard/services/reject_history_service.py
@@ -0,0 +1,676 @@
+# -*- coding: utf-8 -*-
+"""Service layer for reject-history page APIs."""
+
+from __future__ import annotations
+
+import csv
+import io
+import logging
+from datetime import date, datetime
+from typing import Any, Dict, Generator, Iterable, Optional
+
+import pandas as pd
+
+from mes_dashboard.core.database import read_sql_df
+from mes_dashboard.services.filter_cache import get_workcenter_groups
+from mes_dashboard.services.scrap_reason_exclusion_cache import get_excluded_reasons
+from mes_dashboard.sql import QueryBuilder, SQLLoader
+
+logger = logging.getLogger("mes_dashboard.reject_history_service")
+
+MAX_QUERY_DAYS = 730
+VALID_GRANULARITY = {"day", "week", "month"}
+VALID_METRIC_MODE = {"reject_total", "defect"}
+MATERIAL_REASON_OPTION = "原物料報廢"
+
+
+def _parse_date(value: str) -> date:
+    return datetime.strptime(value, "%Y-%m-%d").date()
+
+
+def _validate_range(start_date: str, end_date: str) -> None:
+    start = _parse_date(start_date)
+    end = _parse_date(end_date)
+    if end < start:
+        raise ValueError("end_date 不可早於 start_date")
+    if (end - start).days > MAX_QUERY_DAYS:
+        raise ValueError(f"日期範圍不可超過 {MAX_QUERY_DAYS} 天")
+
+
+def _normalize_text(value: Any) -> str:
+    return str(value or "").strip()
+
+
+def _as_int(value: Any) -> int:
+    if value is None:
+        return 0
+    try:
+        if pd.isna(value):
+            return 0
+    except Exception:
+        pass
+    try:
+        return int(float(value))
+    except (TypeError, ValueError):
+        return 0
+
+
+def _as_float(value: Any) -> float:
+    if value is None:
+        return 0.0
+    try:
+        if pd.isna(value):
+            return 0.0
+    except Exception:
+        pass
+    try:
+        return float(value)
+    except (TypeError, ValueError):
+        return 0.0
+
+
+def _to_date_str(value: Any) -> str:
+    if isinstance(value, datetime):
+        return value.strftime("%Y-%m-%d")
+    if isinstance(value, date):
+        return value.strftime("%Y-%m-%d")
+    if isinstance(value, pd.Timestamp):
+        return value.to_pydatetime().strftime("%Y-%m-%d")
+    text = _normalize_text(value)
+    if not text:
+        return ""
+    try:
+        return pd.to_datetime(text).strftime("%Y-%m-%d")
+    except Exception:
+        return text
+
+
+def _date_bucket_expr(granularity: str) -> str:
+    if granularity == "week":
+        return "TRUNC(b.TXN_DAY, 'IW')"
+    if granularity == "month":
+        return "TRUNC(b.TXN_DAY, 'MM')"
+    return "TRUNC(b.TXN_DAY)"
+
+
+def _metric_column(metric_mode: str) -> str:
+    if metric_mode == "defect":
+        return "b.DEFECT_QTY"
+    return "b.REJECT_TOTAL_QTY"
+
+
+def _load_sql(name: str) -> str:
+    return SQLLoader.load(f"reject_history/{name}")
+
+
+def _base_query_sql() -> str:
+    sql = _load_sql("performance_daily").strip().rstrip(";")
+    # Strip leading comment/blank lines so WITH parsing can detect the first SQL token.
+    lines = sql.splitlines()
+    first_sql_line = 0
+    for index, line in enumerate(lines):
+        token = line.strip()
+        if not token or token.startswith("--"):
+            continue
+        first_sql_line = index
+        break
+    return "\n".join(lines[first_sql_line:]).strip()
+
+
+def _split_with_query(sql: str) -> tuple[str, str] | None:
+    """Split a top-level WITH query into (cte_segment, final_select)."""
+    text = (sql or "").strip()
+    if not text.lower().startswith("with "):
+        return None
+
+    depth = 0
+    in_string = False
+    i = 0
+    while i < len(text):
+        ch = text[i]
+        if ch == "'":
+            if in_string and i + 1 < len(text) and text[i + 1] == "'":
+                i += 2
+                continue
+            in_string = not in_string
+            i += 1
+            continue
+        if in_string:
+            i += 1
+            continue
+
+        if ch == "(":
+            depth += 1
+        elif ch == ")":
+            depth = max(depth - 1, 0)
+        elif depth == 0:
+            head = text[i : i + 6]
+            if head.lower() == "select":
+                prev_ok = i == 0 or not (text[i - 1].isalnum() or text[i - 1] == "_")
+                next_idx = i + 6
+                next_ok = next_idx >= len(text) or not (
+                    text[next_idx].isalnum() or text[next_idx] == "_"
+                )
+                if prev_ok and next_ok:
+                    cte_segment = text[5:i].strip().rstrip(",")
+                    final_select = text[i:].strip()
+                    if cte_segment and final_select:
+                        return cte_segment, final_select
+                    return None
+        i += 1
+    return None
+
+
+def _base_with_cte_sql(alias: str = "base") -> str:
+    base_sql = _base_query_sql()
+    split = _split_with_query(base_sql)
+    if split is None:
+        return f"WITH {alias} AS (\n{base_sql}\n)"
+    cte_segment, final_select = split
+    return f"WITH {cte_segment},\n{alias} AS (\n{final_select}\n)"
+
+
+def _build_where_clause(
+    *,
+    workcenter_groups: Optional[list[str]] = None,
+    packages: Optional[list[str]] = None,
+    reasons: Optional[list[str]] = None,
+    categories: Optional[list[str]] = None,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> tuple[str, dict[str, Any], dict[str, Any]]:
+    builder = QueryBuilder()
+
+    normalized_wc_groups = sorted({_normalize_text(v) for v in (workcenter_groups or []) if _normalize_text(v)})
+    normalized_packages = sorted({_normalize_text(v) for v in (packages or []) if _normalize_text(v)})
+    normalized_reasons = sorted({_normalize_text(v) for v in (reasons or []) if _normalize_text(v)})
+    material_reason_selected = MATERIAL_REASON_OPTION in normalized_reasons
+    reason_name_filters = [value for value in normalized_reasons if value != MATERIAL_REASON_OPTION]
+    normalized_categories = sorted({_normalize_text(v) for v in (categories or []) if _normalize_text(v)})
+
+    if normalized_wc_groups:
+        builder.add_in_condition("b.WORKCENTER_GROUP", normalized_wc_groups)
+    if normalized_packages:
+        builder.add_in_condition("b.PRODUCTLINENAME", normalized_packages)
+    if reason_name_filters:
+        builder.add_in_condition("b.LOSSREASONNAME", reason_name_filters)
+    if material_reason_selected:
+        builder.add_condition("UPPER(NVL(TRIM(b.SCRAP_OBJECTTYPE), '-')) = 'MATERIAL'")
+    material_exclusion_applied = False
+    if exclude_material_scrap and not material_reason_selected:
+        builder.add_condition("UPPER(NVL(TRIM(b.SCRAP_OBJECTTYPE), '-')) <> 'MATERIAL'")
+        material_exclusion_applied = True
+    if normalized_categories:
+        builder.add_in_condition("b.REJECTCATEGORYNAME", normalized_categories)
+
+    exclusions_applied = False
+    excluded_reason_codes = []
+    reason_name_prefix_policy_applied = False
+    if not include_excluded_scrap:
+        excluded_reason_codes = sorted(get_excluded_reasons())
+        reason_name_prefix_policy_applied = True
+        if excluded_reason_codes:
+            exclusions_applied = True
+            # Support exclusion matching by both normalized reason code and full reason text.
+            builder.add_not_in_condition(
+                "UPPER(NVL(TRIM(b.LOSSREASON_CODE), '-'))",
+                excluded_reason_codes,
+            )
+            builder.add_not_in_condition(
+                "UPPER(NVL(TRIM(b.LOSSREASONNAME), '-'))",
+                excluded_reason_codes,
+            )
+        # Exclude reason labels that are not "NNN_*", and always exclude XXX_/ZZZ_ prefixes.
+        builder.add_condition(
+            "REGEXP_LIKE(UPPER(NVL(TRIM(b.LOSSREASONNAME), '')), '^[0-9]{3}_')"
+        )
+        builder.add_condition(
+            "NOT REGEXP_LIKE(UPPER(NVL(TRIM(b.LOSSREASONNAME), '')), '^(XXX|ZZZ)_')"
+        )
+        exclusions_applied = True
+
+    where_clause, params = builder.build_where_only()
+    meta = {
+        "include_excluded_scrap": bool(include_excluded_scrap),
+        "exclusion_applied": exclusions_applied,
+        "reason_name_prefix_policy_applied": reason_name_prefix_policy_applied,
+        "exclude_material_scrap": bool(exclude_material_scrap),
+        "material_exclusion_applied": material_exclusion_applied,
+        "excluded_reason_count": len(excluded_reason_codes),
+        "workcenter_group_count": len(normalized_wc_groups),
+        "package_filter_count": len(normalized_packages),
+        "reason_filter_count": len(reason_name_filters),
+        "material_reason_selected": material_reason_selected,
+    }
+    return where_clause, params, meta
+
+
+def _prepare_sql(
+    name: str,
+    *,
+    where_clause: str = "",
+    bucket_expr: str = "",
+    metric_column: str = "",
+) -> str:
+    sql = _load_sql(name)
+    sql = sql.replace("{{ BASE_QUERY }}", _base_query_sql())
+    sql = sql.replace("{{ BASE_WITH_CTE }}", _base_with_cte_sql("base"))
+    sql = sql.replace("{{ WHERE_CLAUSE }}", where_clause or "")
+    sql = sql.replace("{{ BUCKET_EXPR }}", bucket_expr or "TRUNC(b.TXN_DAY)")
+    sql = sql.replace("{{ METRIC_COLUMN }}", metric_column or "b.REJECT_TOTAL_QTY")
+    return sql
+
+
+def _common_params(start_date: str, end_date: str, extra: Optional[dict[str, Any]] = None) -> dict[str, Any]:
+    params = {"start_date": start_date, "end_date": end_date}
+    if extra:
+        params.update(extra)
+    return params
+
+
+def _list_to_csv(
+    rows: Iterable[dict[str, Any]],
+    headers: list[str],
+) -> Generator[str, None, None]:
+    buffer = io.StringIO()
+    writer = csv.DictWriter(buffer, fieldnames=headers)
+    writer.writeheader()
+    yield buffer.getvalue()
+    buffer.seek(0)
+    buffer.truncate(0)
+
+    for row in rows:
+        writer.writerow(row)
+        yield buffer.getvalue()
+        buffer.seek(0)
+        buffer.truncate(0)
+
+
+def get_filter_options(
+    *,
+    start_date: str,
+    end_date: str,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> dict[str, Any]:
+    """Return workcenter-group / package / reason options."""
+    _validate_range(start_date, end_date)
+
+    where_clause, params, meta = _build_where_clause(
+        include_excluded_scrap=include_excluded_scrap,
+        exclude_material_scrap=exclude_material_scrap,
+    )
+    reason_sql = _prepare_sql("reason_options", where_clause=where_clause)
+    reason_df = read_sql_df(reason_sql, _common_params(start_date, end_date, params))
+    reasons = []
+    if reason_df is not None and not reason_df.empty:
+        reasons = [
+            _normalize_text(v)
+            for v in reason_df.get("REASON", [])
+            if _normalize_text(v)
+        ]
+
+    material_sql = _prepare_sql("material_reason_option", where_clause=where_clause)
+    material_df = read_sql_df(material_sql, _common_params(start_date, end_date, params))
+    has_material_option = False
+    if material_df is not None and not material_df.empty:
+        has_material_option = _as_int(material_df.iloc[0].get("HAS_MATERIAL")) > 0
+
+    package_sql = _prepare_sql("package_options", where_clause=where_clause)
+    package_df = read_sql_df(package_sql, _common_params(start_date, end_date, params))
+    packages = []
+    if package_df is not None and not package_df.empty:
+        packages = [
+            _normalize_text(v)
+            for v in package_df.get("PACKAGE", [])
+            if _normalize_text(v)
+        ]
+
+    groups_raw = get_workcenter_groups() or []
+    workcenter_groups = []
+    for item in groups_raw:
+        name = _normalize_text(item.get("name"))
+        if not name:
+            continue
+        workcenter_groups.append(
+            {
+                "name": name,
+                "sequence": _as_int(item.get("sequence")),
+            }
+        )
+
+    reason_options = sorted(set(reasons))
+    if has_material_option and MATERIAL_REASON_OPTION not in reason_options:
+        reason_options.append(MATERIAL_REASON_OPTION)
+    return {
+        "workcenter_groups": workcenter_groups,
+        "packages": sorted(set(packages)),
+        "reasons": reason_options,
+        "meta": meta,
+    }
+
+
+def query_summary(
+    *,
+    start_date: str,
+    end_date: str,
+    workcenter_groups: Optional[list[str]] = None,
+    packages: Optional[list[str]] = None,
+    reasons: Optional[list[str]] = None,
+    categories: Optional[list[str]] = None,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> dict[str, Any]:
+    _validate_range(start_date, end_date)
+    where_clause, params, meta = _build_where_clause(
+        workcenter_groups=workcenter_groups,
+        packages=packages,
+        reasons=reasons,
+        categories=categories,
+        include_excluded_scrap=include_excluded_scrap,
+        exclude_material_scrap=exclude_material_scrap,
+    )
+    sql = _prepare_sql("summary", where_clause=where_clause)
+    df = read_sql_df(sql, _common_params(start_date, end_date, params))
+    row = (df.iloc[0] if df is not None and not df.empty else {})
+
+    return {
+        "MOVEIN_QTY": _as_int(row.get("MOVEIN_QTY")),
+        "REJECT_TOTAL_QTY": _as_int(row.get("REJECT_TOTAL_QTY")),
+        "DEFECT_QTY": _as_int(row.get("DEFECT_QTY")),
+        "REJECT_RATE_PCT": round(_as_float(row.get("REJECT_RATE_PCT")), 4),
+        "DEFECT_RATE_PCT": round(_as_float(row.get("DEFECT_RATE_PCT")), 4),
+        "REJECT_SHARE_PCT": round(_as_float(row.get("REJECT_SHARE_PCT")), 4),
+        "AFFECTED_LOT_COUNT": _as_int(row.get("AFFECTED_LOT_COUNT")),
+        "AFFECTED_WORKORDER_COUNT": _as_int(row.get("AFFECTED_WORKORDER_COUNT")),
+        "meta": meta,
+    }
+
+
+def query_trend(
+    *,
+    start_date: str,
+    end_date: str,
+    granularity: str = "day",
+    workcenter_groups: Optional[list[str]] = None,
+    packages: Optional[list[str]] = None,
+    reasons: Optional[list[str]] = None,
+    categories: Optional[list[str]] = None,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> dict[str, Any]:
+    _validate_range(start_date, end_date)
+    normalized_granularity = _normalize_text(granularity).lower() or "day"
+    if normalized_granularity not in VALID_GRANULARITY:
+        raise ValueError("Invalid granularity. Use day, week, or month")
+
+    where_clause, params, meta = _build_where_clause(
+        workcenter_groups=workcenter_groups,
+        packages=packages,
+        reasons=reasons,
+        categories=categories,
+        include_excluded_scrap=include_excluded_scrap,
+        exclude_material_scrap=exclude_material_scrap,
+    )
+    sql = _prepare_sql(
+        "trend",
+        where_clause=where_clause,
+        bucket_expr=_date_bucket_expr(normalized_granularity),
+    )
+    df = read_sql_df(sql, _common_params(start_date, end_date, params))
+    items = []
+    if df is not None and not df.empty:
+        for _, row in df.iterrows():
+            items.append(
+                {
+                    "bucket_date": _to_date_str(row.get("BUCKET_DATE")),
+                    "MOVEIN_QTY": _as_int(row.get("MOVEIN_QTY")),
+                    "REJECT_TOTAL_QTY": _as_int(row.get("REJECT_TOTAL_QTY")),
+                    "DEFECT_QTY": _as_int(row.get("DEFECT_QTY")),
+                    "REJECT_RATE_PCT": round(_as_float(row.get("REJECT_RATE_PCT")), 4),
+                    "DEFECT_RATE_PCT": round(_as_float(row.get("DEFECT_RATE_PCT")), 4),
+                }
+            )
+
+    return {
+        "items": items,
+        "granularity": normalized_granularity,
+        "meta": meta,
+    }
+
+
+def query_reason_pareto(
+    *,
+    start_date: str,
+    end_date: str,
+    metric_mode: str = "reject_total",
+    pareto_scope: str = "top80",
+    workcenter_groups: Optional[list[str]] = None,
+    packages: Optional[list[str]] = None,
+    reasons: Optional[list[str]] = None,
+    categories: Optional[list[str]] = None,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> dict[str, Any]:
+    _validate_range(start_date, end_date)
+    normalized_metric = _normalize_text(metric_mode).lower() or "reject_total"
+    if normalized_metric not in VALID_METRIC_MODE:
+        raise ValueError("Invalid metric_mode. Use reject_total or defect")
+
+    normalized_scope = _normalize_text(pareto_scope).lower() or "top80"
+    if normalized_scope not in {"top80", "all"}:
+        raise ValueError("Invalid pareto_scope. Use top80 or all")
+
+    where_clause, params, meta = _build_where_clause(
+        workcenter_groups=workcenter_groups,
+        packages=packages,
+        reasons=reasons,
+        categories=categories,
+        include_excluded_scrap=include_excluded_scrap,
+        exclude_material_scrap=exclude_material_scrap,
+    )
+    sql = _prepare_sql(
+        "reason_pareto",
+        where_clause=where_clause,
+        metric_column=_metric_column(normalized_metric),
+    )
+    df = read_sql_df(sql, _common_params(start_date, end_date, params))
+    all_items = []
+    if df is not None and not df.empty:
+        for _, row in df.iterrows():
+            all_items.append(
+                {
+                    "reason": _normalize_text(row.get("REASON")) or "(未填寫)",
+                    "metric_value": _as_float(row.get("METRIC_VALUE")),
+                    "MOVEIN_QTY": _as_int(row.get("MOVEIN_QTY")),
+                    "REJECT_TOTAL_QTY": _as_int(row.get("REJECT_TOTAL_QTY")),
+                    "DEFECT_QTY": _as_int(row.get("DEFECT_QTY")),
+                    "count": _as_int(row.get("AFFECTED_LOT_COUNT")),
+                    "pct": round(_as_float(row.get("PCT")), 4),
+                    "cumPct": round(_as_float(row.get("CUM_PCT")), 4),
+                }
+            )
+
+    items = list(all_items)
+    if normalized_scope == "top80" and items:
+        top_items = [item for item in items if _as_float(item.get("cumPct")) <= 80.0]
+        # Keep strict top-80% behavior, but still return one row when first item already exceeds 80%.
+        if not top_items:
+            top_items = [items[0]]
+        items = top_items
+
+    return {
+        "items": items,
+        "metric_mode": normalized_metric,
+        "pareto_scope": normalized_scope,
+        "meta": {
+            **meta,
+            "total_items_after_filter": len(all_items),
+            "displayed_items": len(items),
+        },
+    }
+
+
+def query_list(
+    *,
+    start_date: str,
+    end_date: str,
+    page: int = 1,
+    per_page: int = 50,
+    workcenter_groups: Optional[list[str]] = None,
+    packages: Optional[list[str]] = None,
+    reasons: Optional[list[str]] = None,
+    categories: Optional[list[str]] = None,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> dict[str, Any]:
+    _validate_range(start_date, end_date)
+
+    page = max(int(page or 1), 1)
+    per_page = min(max(int(per_page or 50), 1), 200)
+    offset = (page - 1) * per_page
+
+    where_clause, params, meta = _build_where_clause(
+        workcenter_groups=workcenter_groups,
+        packages=packages,
+        reasons=reasons,
+        categories=categories,
+        include_excluded_scrap=include_excluded_scrap,
+        exclude_material_scrap=exclude_material_scrap,
+    )
+    sql = _prepare_sql("list", where_clause=where_clause)
+    query_params = _common_params(
+        start_date,
+        end_date,
+        {
+            **params,
+            "offset": offset,
+            "limit": per_page,
+        },
+    )
+    df = read_sql_df(sql, query_params)
+
+    items = []
+    total = 0
+    if df is not None and not df.empty:
+        total = _as_int(df.iloc[0].get("TOTAL_COUNT"))
+        for _, row in df.iterrows():
+            items.append(
+                {
+                    "TXN_DAY": _to_date_str(row.get("TXN_DAY")),
+                    "TXN_MONTH": _normalize_text(row.get("TXN_MONTH")),
+                    "WORKCENTER_GROUP": _normalize_text(row.get("WORKCENTER_GROUP")),
+                    "WORKCENTERNAME": _normalize_text(row.get("WORKCENTERNAME")),
+                    "SPECNAME": _normalize_text(row.get("SPECNAME")),
+                    "PRODUCTLINENAME": _normalize_text(row.get("PRODUCTLINENAME")),
+                    "PJ_TYPE": _normalize_text(row.get("PJ_TYPE")),
+                    "LOSSREASONNAME": _normalize_text(row.get("LOSSREASONNAME")),
+                    "LOSSREASON_CODE": _normalize_text(row.get("LOSSREASON_CODE")),
+                    "MOVEIN_QTY": _as_int(row.get("MOVEIN_QTY")),
+                    "REJECT_QTY": _as_int(row.get("REJECT_QTY")),
+                    "STANDBY_QTY": _as_int(row.get("STANDBY_QTY")),
+                    "QTYTOPROCESS_QTY": _as_int(row.get("QTYTOPROCESS_QTY")),
+                    "INPROCESS_QTY": _as_int(row.get("INPROCESS_QTY")),
+                    "PROCESSED_QTY": _as_int(row.get("PROCESSED_QTY")),
+                    "REJECT_TOTAL_QTY": _as_int(row.get("REJECT_TOTAL_QTY")),
+                    "DEFECT_QTY": _as_int(row.get("DEFECT_QTY")),
+                    "REJECT_RATE_PCT": round(_as_float(row.get("REJECT_RATE_PCT")), 4),
+                    "DEFECT_RATE_PCT": round(_as_float(row.get("DEFECT_RATE_PCT")), 4),
+                    "REJECT_SHARE_PCT": round(_as_float(row.get("REJECT_SHARE_PCT")), 4),
+                    "AFFECTED_LOT_COUNT": _as_int(row.get("AFFECTED_LOT_COUNT")),
+                    "AFFECTED_WORKORDER_COUNT": _as_int(row.get("AFFECTED_WORKORDER_COUNT")),
+                }
+            )
+
+    total_pages = max((total + per_page - 1) // per_page, 1) if total else 1
+    return {
+        "items": items,
+        "pagination": {
+            "page": page,
+            "perPage": per_page,
+            "total": total,
+            "totalPages": total_pages,
+        },
+        "meta": meta,
+    }
+
+
+def export_csv(
+    *,
+    start_date: str,
+    end_date: str,
+    workcenter_groups: Optional[list[str]] = None,
+    packages: Optional[list[str]] = None,
+    reasons: Optional[list[str]] = None,
+    categories: Optional[list[str]] = None,
+    include_excluded_scrap: bool = False,
+    exclude_material_scrap: bool = True,
+) -> Generator[str, None, None]:
+    _validate_range(start_date, end_date)
+
+    where_clause, params, _meta = _build_where_clause(
+        workcenter_groups=workcenter_groups,
+        packages=packages,
+        reasons=reasons,
+        categories=categories,
+        include_excluded_scrap=include_excluded_scrap,
+        exclude_material_scrap=exclude_material_scrap,
+    )
+    sql = _prepare_sql("export", where_clause=where_clause)
+    df = read_sql_df(sql, _common_params(start_date, end_date, params))
+
+    rows = []
+    if df is not None and not df.empty:
+        for _, row in df.iterrows():
+            rows.append(
+                {
+                    "TXN_DAY": _to_date_str(row.get("TXN_DAY")),
+                    "TXN_MONTH": _normalize_text(row.get("TXN_MONTH")),
+                    "WORKCENTER_GROUP": _normalize_text(row.get("WORKCENTER_GROUP")),
+                    "WORKCENTERNAME": _normalize_text(row.get("WORKCENTERNAME")),
+                    "SPECNAME": _normalize_text(row.get("SPECNAME")),
+                    "PRODUCTLINENAME": _normalize_text(row.get("PRODUCTLINENAME")),
+                    "PJ_TYPE": _normalize_text(row.get("PJ_TYPE")),
+                    "LOSSREASONNAME": _normalize_text(row.get("LOSSREASONNAME")),
+                    "LOSSREASON_CODE": _normalize_text(row.get("LOSSREASON_CODE")),
+                    "MOVEIN_QTY": _as_int(row.get("MOVEIN_QTY")),
+                    "REJECT_QTY": _as_int(row.get("REJECT_QTY")),
+                    "STANDBY_QTY": _as_int(row.get("STANDBY_QTY")),
+                    "QTYTOPROCESS_QTY": _as_int(row.get("QTYTOPROCESS_QTY")),
+                    "INPROCESS_QTY": _as_int(row.get("INPROCESS_QTY")),
+                    "PROCESSED_QTY": _as_int(row.get("PROCESSED_QTY")),
+                    "REJECT_TOTAL_QTY": _as_int(row.get("REJECT_TOTAL_QTY")),
+                    "DEFECT_QTY": _as_int(row.get("DEFECT_QTY")),
+                    "REJECT_RATE_PCT": round(_as_float(row.get("REJECT_RATE_PCT")), 4),
+                    "DEFECT_RATE_PCT": round(_as_float(row.get("DEFECT_RATE_PCT")), 4),
+                    "REJECT_SHARE_PCT": round(_as_float(row.get("REJECT_SHARE_PCT")), 4),
+                    "AFFECTED_LOT_COUNT": _as_int(row.get("AFFECTED_LOT_COUNT")),
+                    "AFFECTED_WORKORDER_COUNT": _as_int(row.get("AFFECTED_WORKORDER_COUNT")),
+                }
+            )
+
+    headers = [
+        "TXN_DAY",
+        "TXN_MONTH",
+        "WORKCENTER_GROUP",
+        "WORKCENTERNAME",
+        "SPECNAME",
+        "PRODUCTLINENAME",
+        "PJ_TYPE",
+        "LOSSREASONNAME",
+        "LOSSREASON_CODE",
+        "MOVEIN_QTY",
+        "REJECT_QTY",
+        "STANDBY_QTY",
+        "QTYTOPROCESS_QTY",
+        "INPROCESS_QTY",
+        "PROCESSED_QTY",
+        "REJECT_TOTAL_QTY",
+        "DEFECT_QTY",
+        "REJECT_RATE_PCT",
+        "DEFECT_RATE_PCT",
+        "REJECT_SHARE_PCT",
+        "AFFECTED_LOT_COUNT",
+        "AFFECTED_WORKORDER_COUNT",
+    ]
+    return _list_to_csv(rows, headers=headers)
diff --git a/src/mes_dashboard/services/scrap_reason_exclusion_cache.py b/src/mes_dashboard/services/scrap_reason_exclusion_cache.py
new file mode 100644
index 0000000..b57cd87
--- /dev/null
+++ b/src/mes_dashboard/services/scrap_reason_exclusion_cache.py
@@ -0,0 +1,236 @@
+# -*- coding: utf-8 -*-
+"""Cache for ERP scrap reasons excluded from yield calculations.
+
+Policy source: DWH.ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE (ENABLE_FLAG='Y').
+Cache strategy:
+- L2 Redis shared cache when available
+- L1 process memory cache fallback
+- Daily full-table refresh (default every 24 hours)
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import os
+import threading
+import time
+from datetime import datetime
+from typing import Iterable
+
+from mes_dashboard.core.database import read_sql_df
+from mes_dashboard.core.redis_client import get_key, get_redis_client, try_acquire_lock, release_lock
+
+logger = logging.getLogger("mes_dashboard.scrap_reason_exclusion_cache")
+
+_REFRESH_SECONDS = max(int(os.getenv("SCRAP_REASON_EXCLUSION_REFRESH_SECONDS", "86400")), 60)
+_REDIS_DATA_KEY = get_key("scrap_exclusion:enabled_reasons")
+_REDIS_META_KEY = get_key("scrap_exclusion:updated_at")
+_LOCK_NAME = "scrap_reason_exclusion_cache_refresh"
+
+_CACHE_LOCK = threading.Lock()
+_CACHE: dict[str, object] = {
+    "reasons": set(),
+    "updated_at": None,
+    "loaded": False,
+    "source": None,
+}
+
+_WORKER_THREAD: threading.Thread | None = None
+_STOP_EVENT = threading.Event()
+
+
+def _normalize_reason(value: object) -> str:
+    return str(value or "").strip().upper()
+
+
+def _extract_reason_codes(values: Iterable[object]) -> set[str]:
+    normalized = {_normalize_reason(v) for v in values}
+    normalized.discard("")
+    return normalized
+
+
+def _load_from_redis() -> tuple[set[str], str | None] | None:
+    client = get_redis_client()
+    if client is None:
+        return None
+
+    try:
+        raw = client.get(_REDIS_DATA_KEY)
+        if not raw:
+            return None
+        data = json.loads(raw)
+        if not isinstance(data, list):
+            return None
+        reasons = _extract_reason_codes(data)
+        updated = client.get(_REDIS_META_KEY)
+        if not reasons:
+            return None
+        return reasons, updated
+    except Exception as exc:  # pragma: no cover - defensive
+        logger.warning("Failed to read scrap exclusion cache from Redis: %s", exc)
+        return None
+
+
+def _save_to_redis(reasons: set[str], updated_at: str) -> None:
+    client = get_redis_client()
+    if client is None:
+        return
+
+    try:
+        payload = json.dumps(sorted(reasons), ensure_ascii=False)
+        # Keep redis key slightly longer than refresh interval to cover worker restarts.
+        ttl = int(_REFRESH_SECONDS * 1.5)
+        client.setex(_REDIS_DATA_KEY, ttl, payload)
+        client.setex(_REDIS_META_KEY, ttl, updated_at)
+    except Exception as exc:  # pragma: no cover - defensive
+        logger.warning("Failed to write scrap exclusion cache to Redis: %s", exc)
+
+
+def _read_enabled_reasons_from_oracle() -> set[str]:
+    sql = """
+        SELECT TRIM(REASON_NAME) AS REASON_NAME
+        FROM DWH.ERP_PJ_WIP_SCRAP_REASONS_EXCLUDE
+        WHERE NVL(ENABLE_FLAG, 'N') = 'Y'
+    """
+    df = read_sql_df(sql)
+    if df is None or df.empty:
+        return set()
+    return _extract_reason_codes(df.get("REASON_NAME", []))
+
+
+def _set_local_cache(reasons: set[str], *, source: str, updated_at: str) -> None:
+    with _CACHE_LOCK:
+        _CACHE["reasons"] = set(reasons)
+        _CACHE["updated_at"] = updated_at
+        _CACHE["loaded"] = True
+        _CACHE["source"] = source
+
+
+def _seconds_since_update() -> float:
+    with _CACHE_LOCK:
+        updated_at = _CACHE.get("updated_at")
+    if not isinstance(updated_at, str) or not updated_at:
+        return float("inf")
+    try:
+        dt = datetime.fromisoformat(updated_at)
+        return max((datetime.now() - dt).total_seconds(), 0.0)
+    except ValueError:
+        return float("inf")
+
+
+def refresh_cache(force: bool = False) -> bool:
+    """Refresh exclusion policy cache from Oracle.
+
+    Returns:
+        True if cache contains usable data after refresh attempt.
+    """
+    if not force and _seconds_since_update() < _REFRESH_SECONDS:
+        return True
+
+    # Cross-worker lock (fail-open when Redis unavailable).
+    if not try_acquire_lock(_LOCK_NAME, ttl_seconds=120):
+        logger.debug("Scrap exclusion cache refresh skipped (lock held by another worker)")
+        return bool(get_excluded_reasons())
+
+    try:
+        reasons = _read_enabled_reasons_from_oracle()
+        updated_at = datetime.now().isoformat()
+        _set_local_cache(reasons, source="oracle", updated_at=updated_at)
+        _save_to_redis(reasons, updated_at)
+        logger.info("Scrap exclusion cache refreshed: %s reasons", len(reasons))
+        return True
+    except Exception as exc:
+        # Fallback to Redis payload if local refresh fails.
+        redis_payload = _load_from_redis()
+        if redis_payload is not None:
+            reasons, updated = redis_payload
+            _set_local_cache(reasons, source="redis", updated_at=updated or datetime.now().isoformat())
+            logger.warning("Scrap exclusion cache fallback to Redis: %s", exc)
+            return True
+
+        with _CACHE_LOCK:
+            loaded = bool(_CACHE.get("loaded"))
+        logger.error("Scrap exclusion cache refresh failed: %s", exc)
+        return loaded
+    finally:
+        release_lock(_LOCK_NAME)
+
+
+def get_excluded_reasons(force_refresh: bool = False) -> set[str]:
+    """Get currently cached exclusion reason codes."""
+    with _CACHE_LOCK:
+        loaded = bool(_CACHE.get("loaded"))
+        reasons = set(_CACHE.get("reasons", set()))
+
+    if force_refresh:
+        refresh_cache(force=True)
+    elif not loaded:
+        # Try Redis before Oracle for fast startup in secondary workers.
+        redis_payload = _load_from_redis()
+        if redis_payload is not None:
+            redis_reasons, updated = redis_payload
+            _set_local_cache(
+                redis_reasons,
+                source="redis",
+                updated_at=updated or datetime.now().isoformat(),
+            )
+            return redis_reasons
+        refresh_cache(force=True)
+    elif _seconds_since_update() >= _REFRESH_SECONDS:
+        refresh_cache(force=True)
+
+    with _CACHE_LOCK:
+        return set(_CACHE.get("reasons", set()))
+
+
+def get_cache_status() -> dict[str, object]:
+    """Expose cache diagnostics for health/admin pages."""
+    with _CACHE_LOCK:
+        return {
+            "loaded": bool(_CACHE.get("loaded")),
+            "updated_at": _CACHE.get("updated_at"),
+            "source": _CACHE.get("source"),
+            "reason_count": len(_CACHE.get("reasons", set())),
+            "refresh_interval_seconds": _REFRESH_SECONDS,
+        }
+
+
+def _worker_loop() -> None:
+    logger.info("Scrap exclusion sync worker started (interval: %ss)", _REFRESH_SECONDS)
+    while not _STOP_EVENT.is_set():
+        try:
+            refresh_cache(force=True)
+        except Exception as exc:  # pragma: no cover - defensive
+            logger.warning("Scrap exclusion worker refresh failed: %s", exc)
+        _STOP_EVENT.wait(_REFRESH_SECONDS)
+    logger.info("Scrap exclusion sync worker stopped")
+
+
+def init_scrap_reason_exclusion_cache(app=None) -> None:
+    """Initialize cache and start background sync worker."""
+    refresh_cache(force=False)
+
+    global _WORKER_THREAD
+    if app is not None and app.config.get("TESTING"):
+        return
+
+    if _WORKER_THREAD and _WORKER_THREAD.is_alive():
+        return
+
+    _STOP_EVENT.clear()
+    _WORKER_THREAD = threading.Thread(
+        target=_worker_loop,
+        daemon=True,
+        name="scrap-exclusion-cache-sync",
+    )
+    _WORKER_THREAD.start()
+
+
+def stop_scrap_reason_exclusion_cache_worker(timeout: int = 5) -> None:
+    global _WORKER_THREAD
+    if not _WORKER_THREAD:
+        return
+    _STOP_EVENT.set()
+    _WORKER_THREAD.join(timeout=timeout)
+    _WORKER_THREAD = None
diff --git a/src/mes_dashboard/sql/reject_history/export.sql b/src/mes_dashboard/sql/reject_history/export.sql
new file mode 100644
index 0000000..dbadf9c
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/export.sql
@@ -0,0 +1,36 @@
+-- Reject History Export (Unpaginated)
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }}
+SELECT
+    b.TXN_DAY,
+    b.TXN_MONTH,
+    b.WORKCENTER_GROUP,
+    b.WORKCENTERNAME,
+    b.SPECNAME,
+    b.PRODUCTLINENAME,
+    b.PJ_TYPE,
+    b.LOSSREASONNAME,
+    b.LOSSREASON_CODE,
+    b.MOVEIN_QTY,
+    b.REJECT_QTY,
+    b.STANDBY_QTY,
+    b.QTYTOPROCESS_QTY,
+    b.INPROCESS_QTY,
+    b.PROCESSED_QTY,
+    b.REJECT_TOTAL_QTY,
+    b.DEFECT_QTY,
+    b.REJECT_RATE_PCT,
+    b.DEFECT_RATE_PCT,
+    b.REJECT_SHARE_PCT,
+    b.AFFECTED_LOT_COUNT,
+    b.AFFECTED_WORKORDER_COUNT
+FROM base b
+{{ WHERE_CLAUSE }}
+ORDER BY
+    b.TXN_DAY DESC,
+    b.WORKCENTERSEQUENCE_GROUP ASC,
+    b.WORKCENTERNAME ASC,
+    b.REJECT_TOTAL_QTY DESC
diff --git a/src/mes_dashboard/sql/reject_history/list.sql b/src/mes_dashboard/sql/reject_history/list.sql
new file mode 100644
index 0000000..54b38f0
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/list.sql
@@ -0,0 +1,48 @@
+-- Reject History Detail List (Paginated)
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }},
+filtered AS (
+    SELECT
+        b.*,
+        COUNT(*) OVER () AS TOTAL_COUNT
+    FROM base b
+    {{ WHERE_CLAUSE }}
+)
+SELECT
+    TXN_DAY,
+    TXN_MONTH,
+    WORKCENTER_GROUP,
+    WORKCENTERSEQUENCE_GROUP,
+    WORKCENTERNAME,
+    SPECNAME,
+    EQUIPMENTNAME,
+    PRIMARY_EQUIPMENTNAME,
+    PRODUCTLINENAME,
+    PJ_TYPE,
+    LOSSREASONNAME,
+    LOSSREASON_CODE,
+    REJECT_EVENT_ROWS,
+    AFFECTED_LOT_COUNT,
+    AFFECTED_WORKORDER_COUNT,
+    MOVEIN_QTY,
+    REJECT_QTY,
+    REJECT_TOTAL_QTY,
+    DEFECT_QTY,
+    STANDBY_QTY,
+    QTYTOPROCESS_QTY,
+    INPROCESS_QTY,
+    PROCESSED_QTY,
+    REJECT_RATE_PCT,
+    DEFECT_RATE_PCT,
+    REJECT_SHARE_PCT,
+    TOTAL_COUNT
+FROM filtered
+ORDER BY
+    TXN_DAY DESC,
+    WORKCENTERSEQUENCE_GROUP ASC,
+    WORKCENTERNAME ASC,
+    REJECT_TOTAL_QTY DESC
+OFFSET :offset ROWS FETCH NEXT :limit ROWS ONLY
diff --git a/src/mes_dashboard/sql/reject_history/material_reason_option.sql b/src/mes_dashboard/sql/reject_history/material_reason_option.sql
new file mode 100644
index 0000000..2d4b1d7
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/material_reason_option.sql
@@ -0,0 +1,19 @@
+-- Reject History Material Reason Option
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }}
+SELECT
+    CASE
+        WHEN SUM(
+            CASE
+                WHEN UPPER(NVL(TRIM(b.SCRAP_OBJECTTYPE), '-')) = 'MATERIAL'
+                THEN NVL(b.REJECT_TOTAL_QTY, 0) + NVL(b.DEFECT_QTY, 0)
+                ELSE 0
+            END
+        ) > 0 THEN 1
+        ELSE 0
+    END AS HAS_MATERIAL
+FROM base b
+{{ WHERE_CLAUSE }}
diff --git a/src/mes_dashboard/sql/reject_history/package_options.sql b/src/mes_dashboard/sql/reject_history/package_options.sql
new file mode 100644
index 0000000..cadcda8
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/package_options.sql
@@ -0,0 +1,15 @@
+-- Reject History Package Options
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }}
+SELECT
+    b.PRODUCTLINENAME AS PACKAGE,
+    SUM(b.REJECT_TOTAL_QTY) AS REJECT_TOTAL_QTY,
+    SUM(b.DEFECT_QTY) AS DEFECT_QTY
+FROM base b
+{{ WHERE_CLAUSE }}
+GROUP BY b.PRODUCTLINENAME
+HAVING SUM(b.REJECT_TOTAL_QTY) > 0 OR SUM(b.DEFECT_QTY) > 0
+ORDER BY PACKAGE
diff --git a/src/mes_dashboard/sql/reject_history/performance_daily.sql b/src/mes_dashboard/sql/reject_history/performance_daily.sql
index 5927956..4a65514 100644
--- a/src/mes_dashboard/sql/reject_history/performance_daily.sql
+++ b/src/mes_dashboard/sql/reject_history/performance_daily.sql
@@ -35,6 +35,7 @@ reject_raw AS (
         NVL(TRIM(r.PJ_WORKORDER), TRIM(c.MFGORDERNAME)) AS PJ_WORKORDER,
         NVL(TRIM(c.PJ_TYPE), '(NA)') AS PJ_TYPE,
         NVL(TRIM(c.PRODUCTLINENAME), '(NA)') AS PRODUCTLINENAME,
+        NVL(TRIM(c.OBJECTTYPE), '(NA)') AS SCRAP_OBJECTTYPE,
         NVL(TRIM(r.WORKCENTERNAME), '(NA)') AS WORKCENTERNAME,
         NVL(TRIM(wm.WORKCENTER_GROUP), NVL(TRIM(r.WORKCENTERNAME), '(NA)')) AS WORKCENTER_GROUP,
         NVL(wm.WORKCENTERSEQUENCE_GROUP, 999) AS WORKCENTERSEQUENCE_GROUP,
@@ -45,6 +46,10 @@ reject_raw AS (
             NVL(TRIM(r.EQUIPMENTNAME), '(NA)')
         ) AS PRIMARY_EQUIPMENTNAME,
         NVL(TRIM(r.LOSSREASONNAME), '(未填寫)') AS LOSSREASONNAME,
+        NVL(
+            TRIM(REGEXP_SUBSTR(NVL(TRIM(r.LOSSREASONNAME), '(未填寫)'), '^[^_[:space:]-]+')),
+            NVL(TRIM(r.LOSSREASONNAME), '(未填寫)')
+        ) AS LOSSREASON_CODE,
         NVL(TRIM(r.REJECTCATEGORYNAME), '(未填寫)') AS REJECTCATEGORYNAME,
         NVL(r.MOVEINQTY, 0) AS MOVEINQTY,
         NVL(r.REJECTQTY, 0) AS REJECT_QTY,
@@ -84,8 +89,10 @@ daily_agg AS (
         EQUIPMENTNAME,
         PRIMARY_EQUIPMENTNAME,
         PRODUCTLINENAME,
+        SCRAP_OBJECTTYPE,
         PJ_TYPE,
         LOSSREASONNAME,
+        LOSSREASON_CODE,
         REJECTCATEGORYNAME,
         COUNT(*) AS REJECT_EVENT_ROWS,
         COUNT(DISTINCT CONTAINERID) AS AFFECTED_LOT_COUNT,
@@ -109,8 +116,10 @@ daily_agg AS (
         EQUIPMENTNAME,
         PRIMARY_EQUIPMENTNAME,
         PRODUCTLINENAME,
+        SCRAP_OBJECTTYPE,
         PJ_TYPE,
         LOSSREASONNAME,
+        LOSSREASON_CODE,
         REJECTCATEGORYNAME
 )
 SELECT
@@ -123,8 +132,10 @@ SELECT
     EQUIPMENTNAME,
     PRIMARY_EQUIPMENTNAME,
     PRODUCTLINENAME,
+    SCRAP_OBJECTTYPE,
     PJ_TYPE,
     LOSSREASONNAME,
+    LOSSREASON_CODE,
     REJECTCATEGORYNAME,
     REJECT_EVENT_ROWS,
     AFFECTED_LOT_COUNT,
@@ -150,4 +161,3 @@ SELECT
         ELSE ROUND(REJECT_TOTAL_QTY * 100 / (REJECT_TOTAL_QTY + DEFECT_QTY), 4)
     END AS REJECT_SHARE_PCT
 FROM daily_agg
-ORDER BY TXN_DAY DESC, WORKCENTERSEQUENCE_GROUP, WORKCENTERNAME, DEFECT_QTY DESC
diff --git a/src/mes_dashboard/sql/reject_history/reason_options.sql b/src/mes_dashboard/sql/reject_history/reason_options.sql
new file mode 100644
index 0000000..03c8e93
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/reason_options.sql
@@ -0,0 +1,14 @@
+-- Reject History Reason Options
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+
+{{ BASE_WITH_CTE }}
+SELECT
+    b.LOSSREASONNAME AS REASON,
+    SUM(b.REJECT_TOTAL_QTY) AS REJECT_TOTAL_QTY,
+    SUM(b.DEFECT_QTY) AS DEFECT_QTY
+FROM base b
+{{ WHERE_CLAUSE }}
+GROUP BY b.LOSSREASONNAME
+HAVING SUM(b.REJECT_TOTAL_QTY) > 0 OR SUM(b.DEFECT_QTY) > 0
+ORDER BY REASON
diff --git a/src/mes_dashboard/sql/reject_history/reason_pareto.sql b/src/mes_dashboard/sql/reject_history/reason_pareto.sql
new file mode 100644
index 0000000..345aa2a
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/reason_pareto.sql
@@ -0,0 +1,41 @@
+-- Reject History Reason Pareto
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   METRIC_COLUMN (metric expression: b.REJECT_TOTAL_QTY or b.DEFECT_QTY)
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }},
+reason_agg AS (
+    SELECT
+        b.LOSSREASONNAME AS REASON,
+        SUM({{ METRIC_COLUMN }}) AS METRIC_VALUE,
+        SUM(b.MOVEIN_QTY) AS MOVEIN_QTY,
+        SUM(b.REJECT_TOTAL_QTY) AS REJECT_TOTAL_QTY,
+        SUM(b.DEFECT_QTY) AS DEFECT_QTY,
+        SUM(b.AFFECTED_LOT_COUNT) AS AFFECTED_LOT_COUNT
+    FROM base b
+    {{ WHERE_CLAUSE }}
+    GROUP BY
+        b.LOSSREASONNAME
+    HAVING SUM({{ METRIC_COLUMN }}) > 0
+)
+SELECT
+    REASON,
+    METRIC_VALUE,
+    MOVEIN_QTY,
+    REJECT_TOTAL_QTY,
+    DEFECT_QTY,
+    AFFECTED_LOT_COUNT,
+    ROUND(
+        METRIC_VALUE * 100 / NULLIF(SUM(METRIC_VALUE) OVER (), 0),
+        4
+    ) AS PCT,
+    ROUND(
+        SUM(METRIC_VALUE) OVER (
+            ORDER BY METRIC_VALUE DESC, REASON
+            ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
+        ) * 100 / NULLIF(SUM(METRIC_VALUE) OVER (), 0),
+        4
+    ) AS CUM_PCT
+FROM reason_agg
+ORDER BY METRIC_VALUE DESC, REASON
diff --git a/src/mes_dashboard/sql/reject_history/summary.sql b/src/mes_dashboard/sql/reject_history/summary.sql
new file mode 100644
index 0000000..bda640f
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/summary.sql
@@ -0,0 +1,31 @@
+-- Reject History Summary
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }}
+SELECT
+    NVL(SUM(b.MOVEIN_QTY), 0) AS MOVEIN_QTY,
+    NVL(SUM(b.REJECT_TOTAL_QTY), 0) AS REJECT_TOTAL_QTY,
+    NVL(SUM(b.DEFECT_QTY), 0) AS DEFECT_QTY,
+    CASE
+        WHEN NVL(SUM(b.MOVEIN_QTY), 0) = 0 THEN 0
+        ELSE ROUND(NVL(SUM(b.REJECT_TOTAL_QTY), 0) * 100 / SUM(b.MOVEIN_QTY), 4)
+    END AS REJECT_RATE_PCT,
+    CASE
+        WHEN NVL(SUM(b.MOVEIN_QTY), 0) = 0 THEN 0
+        ELSE ROUND(NVL(SUM(b.DEFECT_QTY), 0) * 100 / SUM(b.MOVEIN_QTY), 4)
+    END AS DEFECT_RATE_PCT,
+    CASE
+        WHEN NVL(SUM(b.REJECT_TOTAL_QTY), 0) + NVL(SUM(b.DEFECT_QTY), 0) = 0 THEN 0
+        ELSE ROUND(
+            NVL(SUM(b.REJECT_TOTAL_QTY), 0) * 100
+            / (NVL(SUM(b.REJECT_TOTAL_QTY), 0) + NVL(SUM(b.DEFECT_QTY), 0)),
+            4
+        )
+    END AS REJECT_SHARE_PCT,
+    COUNT(DISTINCT b.WORKCENTER_GROUP || ':' || b.WORKCENTERNAME || ':' || b.SPECNAME || ':' || b.TXN_DAY) AS AFFECTED_EVENT_BUCKET_COUNT,
+    NVL(SUM(b.AFFECTED_LOT_COUNT), 0) AS AFFECTED_LOT_COUNT,
+    NVL(SUM(b.AFFECTED_WORKORDER_COUNT), 0) AS AFFECTED_WORKORDER_COUNT
+FROM base b
+{{ WHERE_CLAUSE }}
diff --git a/src/mes_dashboard/sql/reject_history/trend.sql b/src/mes_dashboard/sql/reject_history/trend.sql
new file mode 100644
index 0000000..eeef511
--- /dev/null
+++ b/src/mes_dashboard/sql/reject_history/trend.sql
@@ -0,0 +1,32 @@
+-- Reject History Trend
+-- Template slots:
+--   BASE_QUERY (base reject-history daily dataset SQL)
+--   BUCKET_EXPR (Oracle date bucket expression, e.g. TRUNC(b.TXN_DAY))
+--   WHERE_CLAUSE (QueryBuilder-generated WHERE clause against alias b)
+
+{{ BASE_WITH_CTE }},
+trend_raw AS (
+    SELECT
+        {{ BUCKET_EXPR }} AS BUCKET_DATE,
+        SUM(b.MOVEIN_QTY) AS MOVEIN_QTY,
+        SUM(b.REJECT_TOTAL_QTY) AS REJECT_TOTAL_QTY,
+        SUM(b.DEFECT_QTY) AS DEFECT_QTY
+    FROM base b
+    {{ WHERE_CLAUSE }}
+    GROUP BY {{ BUCKET_EXPR }}
+)
+SELECT
+    BUCKET_DATE,
+    MOVEIN_QTY,
+    REJECT_TOTAL_QTY,
+    DEFECT_QTY,
+    CASE
+        WHEN MOVEIN_QTY = 0 THEN 0
+        ELSE ROUND(REJECT_TOTAL_QTY * 100 / MOVEIN_QTY, 4)
+    END AS REJECT_RATE_PCT,
+    CASE
+        WHEN MOVEIN_QTY = 0 THEN 0
+        ELSE ROUND(DEFECT_QTY * 100 / MOVEIN_QTY, 4)
+    END AS DEFECT_RATE_PCT
+FROM trend_raw
+ORDER BY BUCKET_DATE
diff --git a/tests/test_app_factory.py b/tests/test_app_factory.py
index a56976c..77b8d9d 100644
--- a/tests/test_app_factory.py
+++ b/tests/test_app_factory.py
@@ -55,6 +55,7 @@ class AppFactoryTests(unittest.TestCase):
             "/wip-overview",
             "/wip-detail",
             "/hold-overview",
+            "/reject-history",
             "/excel-query",
             "/query-tool",
             "/tmtt-defect",
@@ -74,6 +75,7 @@ class AppFactoryTests(unittest.TestCase):
             "/api/excel-query/upload",
             "/api/query-tool/resolve",
             "/api/tmtt-defect/analysis",
+            "/api/reject-history/summary",
         }
         missing = expected - rules
         self.assertFalse(missing, f"Missing routes: {sorted(missing)}")
diff --git a/tests/test_portal_shell_wave_b_native_smoke.py b/tests/test_portal_shell_wave_b_native_smoke.py
index 9b5142c..41cb182 100644
--- a/tests/test_portal_shell_wave_b_native_smoke.py
+++ b/tests/test_portal_shell_wave_b_native_smoke.py
@@ -260,3 +260,133 @@ def test_tmtt_defect_native_smoke_range_query_and_csv_export(client):
         export = client.get("/api/tmtt-defect/export?start_date=2026-02-01&end_date=2026-02-11")
         assert export.status_code == 200
         assert "text/csv" in export.content_type
+
+
+def test_reject_history_native_smoke_query_sections_and_export(client):
+    _login_as_admin(client)
+
+    shell = client.get("/portal-shell/reject-history?start_date=2026-02-01&end_date=2026-02-11")
+    assert shell.status_code == 200
+
+    page = client.get("/reject-history", follow_redirects=False)
+    if page.status_code == 302:
+        assert page.status_code == 302
+        assert page.location.endswith("/portal-shell/reject-history")
+    elif page.status_code == 200:
+        assert page.status_code == 200
+    else:
+        raise AssertionError(f"unexpected status for /reject-history: {page.status_code}")
+
+    with (
+        patch(
+            "mes_dashboard.routes.reject_history_routes.get_filter_options",
+            return_value={
+                "workcenter_groups": [{"name": "WB", "sequence": 1}],
+                "reasons": ["R1"],
+                "meta": {"include_excluded_scrap": False},
+            },
+        ),
+        patch(
+            "mes_dashboard.routes.reject_history_routes.query_summary",
+            return_value={
+                "MOVEIN_QTY": 100,
+                "REJECT_TOTAL_QTY": 10,
+                "DEFECT_QTY": 2,
+                "REJECT_RATE_PCT": 10.0,
+                "DEFECT_RATE_PCT": 2.0,
+                "REJECT_SHARE_PCT": 83.3333,
+                "AFFECTED_LOT_COUNT": 5,
+                "AFFECTED_WORKORDER_COUNT": 3,
+                "meta": {"include_excluded_scrap": False},
+            },
+        ),
+        patch(
+            "mes_dashboard.routes.reject_history_routes.query_trend",
+            return_value={
+                "items": [
+                    {
+                        "bucket_date": "2026-02-01",
+                        "MOVEIN_QTY": 100,
+                        "REJECT_TOTAL_QTY": 10,
+                        "DEFECT_QTY": 2,
+                        "REJECT_RATE_PCT": 10.0,
+                        "DEFECT_RATE_PCT": 2.0,
+                    }
+                ],
+                "granularity": "day",
+                "meta": {"include_excluded_scrap": False},
+            },
+        ),
+        patch(
+            "mes_dashboard.routes.reject_history_routes.query_reason_pareto",
+            return_value={
+                "items": [
+                    {
+                        "reason": "R1",
+                        "category": "CAT1",
+                        "metric_value": 10,
+                        "pct": 100.0,
+                        "cumPct": 100.0,
+                    }
+                ],
+                "metric_mode": "reject_total",
+                "pareto_scope": "top80",
+                "meta": {"include_excluded_scrap": False},
+            },
+        ),
+        patch(
+            "mes_dashboard.routes.reject_history_routes.query_list",
+            return_value={
+                "items": [
+                    {
+                        "TXN_DAY": "2026-02-01",
+                        "WORKCENTER_GROUP": "WB",
+                        "WORKCENTERNAME": "WB01",
+                        "LOSSREASONNAME": "R1",
+                        "REJECT_TOTAL_QTY": 10,
+                        "DEFECT_QTY": 2,
+                    }
+                ],
+                "pagination": {"page": 1, "perPage": 50, "total": 1, "totalPages": 1},
+                "meta": {"include_excluded_scrap": False},
+            },
+        ),
+        patch(
+            "mes_dashboard.routes.reject_history_routes.export_csv",
+            return_value=iter(
+                [
+                    "TXN_DAY,REJECT_TOTAL_QTY,DEFECT_QTY\n",
+                    "2026-02-01,10,2\n",
+                ]
+            ),
+        ),
+    ):
+        options = client.get("/api/reject-history/options?start_date=2026-02-01&end_date=2026-02-11")
+        assert options.status_code == 200
+        assert options.get_json()["success"] is True
+        assert options.get_json()["data"]["reasons"] == ["R1"]
+
+        summary = client.get("/api/reject-history/summary?start_date=2026-02-01&end_date=2026-02-11")
+        assert summary.status_code == 200
+        summary_payload = summary.get_json()
+        assert summary_payload["success"] is True
+        assert summary_payload["data"]["REJECT_TOTAL_QTY"] == 10
+
+        trend = client.get("/api/reject-history/trend?start_date=2026-02-01&end_date=2026-02-11")
+        assert trend.status_code == 200
+        assert trend.get_json()["success"] is True
+        assert trend.get_json()["data"]["items"][0]["bucket_date"] == "2026-02-01"
+
+        pareto = client.get("/api/reject-history/reason-pareto?start_date=2026-02-01&end_date=2026-02-11")
+        assert pareto.status_code == 200
+        assert pareto.get_json()["success"] is True
+        assert pareto.get_json()["data"]["items"][0]["reason"] == "R1"
+
+        detail = client.get("/api/reject-history/list?start_date=2026-02-01&end_date=2026-02-11")
+        assert detail.status_code == 200
+        assert detail.get_json()["success"] is True
+        assert detail.get_json()["data"]["pagination"]["total"] == 1
+
+        export = client.get("/api/reject-history/export?start_date=2026-02-01&end_date=2026-02-11")
+        assert export.status_code == 200
+        assert "text/csv" in export.content_type
diff --git a/tests/test_reject_history_routes.py b/tests/test_reject_history_routes.py
new file mode 100644
index 0000000..64ed3fd
--- /dev/null
+++ b/tests/test_reject_history_routes.py
@@ -0,0 +1,150 @@
+# -*- coding: utf-8 -*-
+"""Unit tests for reject-history routes."""
+
+import json
+import os
+import unittest
+from unittest.mock import patch
+
+from mes_dashboard.app import create_app
+import mes_dashboard.core.database as db
+
+
+def _login_as_admin(client):
+    with client.session_transaction() as sess:
+        sess['admin'] = {'displayName': 'Admin', 'employeeNo': 'A001'}
+
+
+class TestRejectHistoryRoutesBase(unittest.TestCase):
+    def setUp(self):
+        db._ENGINE = None
+        self.app = create_app('testing')
+        self.app.config['TESTING'] = True
+        self.client = self.app.test_client()
+
+
+class TestRejectHistoryPageRoute(unittest.TestCase):
+    @patch.dict(os.environ, {'PORTAL_SPA_ENABLED': 'false'})
+    @patch('mes_dashboard.app.os.path.exists', return_value=False)
+    def test_reject_history_page_fallback_contains_vite_entry(self, _mock_exists):
+        db._ENGINE = None
+        app = create_app('testing')
+        app.config['TESTING'] = True
+        client = app.test_client()
+        _login_as_admin(client)
+
+        response = client.get('/reject-history', follow_redirects=False)
+        self.assertEqual(response.status_code, 200)
+        html = response.data.decode('utf-8')
+        self.assertIn('/static/dist/reject-history.js', html)
+
+
+class TestRejectHistoryApiRoutes(TestRejectHistoryRoutesBase):
+    def test_summary_missing_dates_returns_400(self):
+        response = self.client.get('/api/reject-history/summary')
+        payload = json.loads(response.data)
+
+        self.assertEqual(response.status_code, 400)
+        self.assertFalse(payload['success'])
+
+    def test_summary_invalid_include_excluded_scrap_returns_400(self):
+        response = self.client.get(
+            '/api/reject-history/summary?start_date=2026-02-01&end_date=2026-02-07'
+            '&include_excluded_scrap=invalid'
+        )
+        payload = json.loads(response.data)
+
+        self.assertEqual(response.status_code, 400)
+        self.assertFalse(payload['success'])
+
+    def test_summary_invalid_exclude_material_scrap_returns_400(self):
+        response = self.client.get(
+            '/api/reject-history/summary?start_date=2026-02-01&end_date=2026-02-07'
+            '&exclude_material_scrap=invalid'
+        )
+        payload = json.loads(response.data)
+
+        self.assertEqual(response.status_code, 400)
+        self.assertFalse(payload['success'])
+
+    @patch('mes_dashboard.routes.reject_history_routes.query_summary')
+    def test_summary_passes_filters_and_meta(self, mock_summary):
+        mock_summary.return_value = {
+            'MOVEIN_QTY': 100,
+            'REJECT_TOTAL_QTY': 10,
+            'DEFECT_QTY': 5,
+            'REJECT_RATE_PCT': 10,
+            'DEFECT_RATE_PCT': 5,
+            'REJECT_SHARE_PCT': 66.7,
+            'AFFECTED_LOT_COUNT': 8,
+            'AFFECTED_WORKORDER_COUNT': 4,
+            'meta': {
+                'include_excluded_scrap': False,
+                'exclusion_applied': True,
+                'excluded_reason_count': 2,
+            },
+        }
+
+        response = self.client.get(
+            '/api/reject-history/summary?start_date=2026-02-01&end_date=2026-02-07'
+            '&workcenter_groups=WB&packages=PKG-A&reasons=R1&reasons=R2'
+        )
+        payload = json.loads(response.data)
+
+        self.assertEqual(response.status_code, 200)
+        self.assertTrue(payload['success'])
+        self.assertEqual(payload['meta']['include_excluded_scrap'], False)
+        _, kwargs = mock_summary.call_args
+        self.assertEqual(kwargs['workcenter_groups'], ['WB'])
+        self.assertEqual(kwargs['packages'], ['PKG-A'])
+        self.assertEqual(kwargs['reasons'], ['R1', 'R2'])
+        self.assertIs(kwargs['include_excluded_scrap'], False)
+        self.assertIs(kwargs['exclude_material_scrap'], True)
+
+    @patch('mes_dashboard.routes.reject_history_routes.query_trend')
+    def test_trend_invalid_granularity_returns_400(self, mock_trend):
+        mock_trend.side_effect = ValueError('Invalid granularity. Use day, week, or month')
+
+        response = self.client.get(
+            '/api/reject-history/trend?start_date=2026-02-01&end_date=2026-02-07&granularity=hour'
+        )
+        payload = json.loads(response.data)
+
+        self.assertEqual(response.status_code, 400)
+        self.assertFalse(payload['success'])
+
+    @patch('mes_dashboard.routes.reject_history_routes.query_reason_pareto')
+    def test_reason_pareto_defaults_top80(self, mock_pareto):
+        mock_pareto.return_value = {'items': [], 'metric_mode': 'reject_total', 'pareto_scope': 'top80', 'meta': {}}
+
+        response = self.client.get('/api/reject-history/reason-pareto?start_date=2026-02-01&end_date=2026-02-07')
+
+        self.assertEqual(response.status_code, 200)
+        _, kwargs = mock_pareto.call_args
+        self.assertEqual(kwargs['pareto_scope'], 'top80')
+        self.assertEqual(kwargs['metric_mode'], 'reject_total')
+
+    @patch('mes_dashboard.routes.reject_history_routes.query_list')
+    @patch('mes_dashboard.core.rate_limit.check_and_record', return_value=(True, 6))
+    def test_list_rate_limited_returns_429(self, _mock_limit, mock_list):
+        response = self.client.get('/api/reject-history/list?start_date=2026-02-01&end_date=2026-02-07')
+        payload = json.loads(response.data)
+
+        self.assertEqual(response.status_code, 429)
+        self.assertEqual(payload['error']['code'], 'TOO_MANY_REQUESTS')
+        self.assertEqual(response.headers.get('Retry-After'), '6')
+        mock_list.assert_not_called()
+
+    @patch('mes_dashboard.routes.reject_history_routes.export_csv')
+    def test_export_returns_csv_response(self, mock_export):
+        mock_export.return_value = iter(['A,B\n', '1,2\n'])
+
+        response = self.client.get('/api/reject-history/export?start_date=2026-02-01&end_date=2026-02-07')
+
+        self.assertEqual(response.status_code, 200)
+        self.assertIn('attachment; filename=reject_history_2026-02-01_to_2026-02-07.csv', response.headers.get('Content-Disposition', ''))
+        self.assertIn('text/csv', response.headers.get('Content-Type', ''))
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_reject_history_service.py b/tests/test_reject_history_service.py
new file mode 100644
index 0000000..bd3f34e
--- /dev/null
+++ b/tests/test_reject_history_service.py
@@ -0,0 +1,360 @@
+# -*- coding: utf-8 -*-
+"""Unit tests for reject_history_service."""
+
+from __future__ import annotations
+
+import pandas as pd
+import pytest
+
+from mes_dashboard.services import reject_history_service as svc
+
+
+def test_query_summary_returns_metrics_and_policy_meta(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: {"358"})
+
+    captured = {}
+
+    def _fake_read_sql_df(_sql, params=None):
+        captured["params"] = dict(params or {})
+        return pd.DataFrame(
+            [
+                {
+                    "MOVEIN_QTY": 1000,
+                    "REJECT_TOTAL_QTY": 25,
+                    "DEFECT_QTY": 10,
+                    "REJECT_RATE_PCT": 2.5,
+                    "DEFECT_RATE_PCT": 1.0,
+                    "REJECT_SHARE_PCT": 71.4286,
+                    "AFFECTED_LOT_COUNT": 12,
+                    "AFFECTED_WORKORDER_COUNT": 7,
+                }
+            ]
+        )
+
+    monkeypatch.setattr(svc, "read_sql_df", _fake_read_sql_df)
+
+    result = svc.query_summary(
+        start_date="2026-02-01",
+        end_date="2026-02-07",
+        include_excluded_scrap=False,
+    )
+
+    assert result["MOVEIN_QTY"] == 1000
+    assert result["REJECT_TOTAL_QTY"] == 25
+    assert result["DEFECT_QTY"] == 10
+    assert result["AFFECTED_LOT_COUNT"] == 12
+    assert result["meta"]["include_excluded_scrap"] is False
+    assert result["meta"]["exclusion_applied"] is True
+    assert result["meta"]["excluded_reason_count"] == 1
+
+    assert captured["params"]["start_date"] == "2026-02-01"
+    assert captured["params"]["end_date"] == "2026-02-07"
+    assert "358" in captured["params"].values()
+
+
+def test_query_summary_include_override_skips_exclusion_filter(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: {"358", "REASON_X"})
+
+    captured = {}
+
+    def _fake_read_sql_df(_sql, params=None):
+        captured["params"] = dict(params or {})
+        return pd.DataFrame(
+            [
+                {
+                    "MOVEIN_QTY": 1000,
+                    "REJECT_TOTAL_QTY": 25,
+                    "DEFECT_QTY": 10,
+                    "REJECT_RATE_PCT": 2.5,
+                    "DEFECT_RATE_PCT": 1.0,
+                    "REJECT_SHARE_PCT": 71.4286,
+                    "AFFECTED_LOT_COUNT": 12,
+                    "AFFECTED_WORKORDER_COUNT": 7,
+                }
+            ]
+        )
+
+    monkeypatch.setattr(svc, "read_sql_df", _fake_read_sql_df)
+    result = svc.query_summary(
+        start_date="2026-02-01",
+        end_date="2026-02-07",
+        include_excluded_scrap=True,
+    )
+
+    assert result["meta"]["include_excluded_scrap"] is True
+    assert result["meta"]["exclusion_applied"] is False
+    assert result["meta"]["excluded_reason_count"] == 0
+    assert "358" not in captured["params"].values()
+    assert "REASON_X" not in captured["params"].values()
+
+
+def test_build_where_clause_applies_reason_prefix_policy_by_default(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+    where_clause, _params, meta = svc._build_where_clause(include_excluded_scrap=False)
+
+    assert "REGEXP_LIKE(UPPER(NVL(TRIM(b.LOSSREASONNAME), '')), '^[0-9]{3}_')" in where_clause
+    assert "NOT REGEXP_LIKE(UPPER(NVL(TRIM(b.LOSSREASONNAME), '')), '^(XXX|ZZZ)_')" in where_clause
+    assert meta["reason_name_prefix_policy_applied"] is True
+    assert meta["exclusion_applied"] is True
+
+
+def test_build_where_clause_include_override_skips_reason_prefix_policy(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: {"358"})
+    where_clause, params, meta = svc._build_where_clause(
+        include_excluded_scrap=True,
+        packages=["PKG-A"],
+    )
+
+    assert "REGEXP_LIKE(UPPER(NVL(TRIM(b.LOSSREASONNAME), '')), '^[0-9]{3}_')" not in where_clause
+    assert "NOT REGEXP_LIKE(UPPER(NVL(TRIM(b.LOSSREASONNAME), '')), '^(XXX|ZZZ)_')" not in where_clause
+    assert meta["reason_name_prefix_policy_applied"] is False
+    assert meta["exclusion_applied"] is False
+    assert meta["package_filter_count"] == 1
+    assert "358" not in params.values()
+
+
+def test_get_filter_options_includes_packages(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+    monkeypatch.setattr(
+        svc,
+        "get_workcenter_groups",
+        lambda: [
+            {"name": "WB", "sequence": 1},
+            {"name": "FA", "sequence": 2},
+        ],
+    )
+
+    def _fake_read_sql_df(sql, _params=None):
+        if "AS REASON" in sql:
+            return pd.DataFrame([{"REASON": "R1"}, {"REASON": "R2"}])
+        if "AS PACKAGE" in sql:
+            return pd.DataFrame([{"PACKAGE": "PKG-A"}, {"PACKAGE": "PKG-B"}])
+        return pd.DataFrame()
+
+    monkeypatch.setattr(svc, "read_sql_df", _fake_read_sql_df)
+
+    result = svc.get_filter_options(
+        start_date="2026-02-01",
+        end_date="2026-02-07",
+        include_excluded_scrap=False,
+    )
+
+    assert result["reasons"] == ["R1", "R2"]
+    assert result["packages"] == ["PKG-A", "PKG-B"]
+    assert result["workcenter_groups"][0]["name"] == "WB"
+
+
+def test_get_filter_options_appends_material_reason_option(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+    monkeypatch.setattr(svc, "get_workcenter_groups", lambda: [])
+
+    def _fake_read_sql_df(sql, _params=None):
+        if "AS REASON" in sql:
+            return pd.DataFrame([{"REASON": "001_TEST"}])
+        if "AS PACKAGE" in sql:
+            return pd.DataFrame([{"PACKAGE": "PKG-A"}])
+        if "AS HAS_MATERIAL" in sql:
+            return pd.DataFrame([{"HAS_MATERIAL": 1}])
+        return pd.DataFrame()
+
+    monkeypatch.setattr(svc, "read_sql_df", _fake_read_sql_df)
+
+    result = svc.get_filter_options(start_date="2026-02-01", end_date="2026-02-07")
+    assert svc.MATERIAL_REASON_OPTION in result["reasons"]
+
+
+def test_build_where_clause_with_material_reason_adds_objecttype_condition(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+    where_clause, _params, meta = svc._build_where_clause(reasons=[svc.MATERIAL_REASON_OPTION])
+
+    assert "UPPER(NVL(TRIM(b.SCRAP_OBJECTTYPE), '-')) = 'MATERIAL'" in where_clause
+    assert meta["material_reason_selected"] is True
+
+
+def test_build_where_clause_exclude_material_scrap_adds_not_material_condition(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+    where_clause, _params, meta = svc._build_where_clause(exclude_material_scrap=True)
+
+    assert "UPPER(NVL(TRIM(b.SCRAP_OBJECTTYPE), '-')) <> 'MATERIAL'" in where_clause
+    assert meta["exclude_material_scrap"] is True
+    assert meta["material_exclusion_applied"] is True
+
+
+def test_sql_template_replacement_does_not_introduce_fake_bind_placeholders():
+    sql = svc._prepare_sql(
+        "summary",
+        where_clause="WHERE 1=1",
+        bucket_expr="TRUNC(b.TXN_DAY)",
+        metric_column="b.REJECT_TOTAL_QTY",
+    )
+
+    assert ":BASE" not in sql
+    assert ":WHERE" not in sql
+    assert ":BUCKET" not in sql
+    assert ":METRIC" not in sql
+
+
+def test_base_with_cte_sql_flattens_nested_with(monkeypatch):
+    monkeypatch.setattr(
+        svc,
+        "_load_sql",
+        lambda name: (
+            "-- comment line\n"
+            "WITH c1 AS (SELECT 1 AS X FROM DUAL),\n"
+            "c2 AS (SELECT X FROM c1)\n"
+            "SELECT X FROM c2"
+        )
+        if name == "performance_daily"
+        else "",
+    )
+
+    rendered = svc._base_with_cte_sql("base")
+    assert rendered.startswith("WITH c1 AS")
+    assert "base AS (\nSELECT X FROM c2\n)" in rendered
+    assert "WITH base AS (\nWITH c1" not in rendered
+
+
+def test_query_trend_invalid_granularity_raises():
+    with pytest.raises(ValueError, match="Invalid granularity"):
+        svc.query_trend(start_date="2026-02-01", end_date="2026-02-07", granularity="hour")
+
+
+def test_query_reason_pareto_top80_scope(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+
+    monkeypatch.setattr(
+        svc,
+        "read_sql_df",
+        lambda _sql, _params=None: pd.DataFrame(
+            [
+                {"REASON": "R1", "CATEGORY": "C1", "METRIC_VALUE": 50, "MOVEIN_QTY": 100, "REJECT_TOTAL_QTY": 50, "DEFECT_QTY": 0, "AFFECTED_LOT_COUNT": 10, "PCT": 50, "CUM_PCT": 50},
+                {"REASON": "R2", "CATEGORY": "C1", "METRIC_VALUE": 29, "MOVEIN_QTY": 100, "REJECT_TOTAL_QTY": 29, "DEFECT_QTY": 0, "AFFECTED_LOT_COUNT": 8, "PCT": 29, "CUM_PCT": 79},
+                {"REASON": "R3", "CATEGORY": "C2", "METRIC_VALUE": 13, "MOVEIN_QTY": 100, "REJECT_TOTAL_QTY": 13, "DEFECT_QTY": 0, "AFFECTED_LOT_COUNT": 6, "PCT": 13, "CUM_PCT": 92},
+                {"REASON": "R4", "CATEGORY": "C3", "METRIC_VALUE": 8, "MOVEIN_QTY": 100, "REJECT_TOTAL_QTY": 8, "DEFECT_QTY": 0, "AFFECTED_LOT_COUNT": 5, "PCT": 8, "CUM_PCT": 100},
+            ]
+        ),
+    )
+
+    top80 = svc.query_reason_pareto(
+        start_date="2026-02-01",
+        end_date="2026-02-07",
+        metric_mode="reject_total",
+        pareto_scope="top80",
+    )
+    assert len(top80["items"]) == 2
+    assert top80["items"][-1]["reason"] == "R2"
+    assert "category" not in top80["items"][0]
+
+    all_items = svc.query_reason_pareto(
+        start_date="2026-02-01",
+        end_date="2026-02-07",
+        metric_mode="reject_total",
+        pareto_scope="all",
+    )
+    assert len(all_items["items"]) == 4
+
+
+def test_query_list_pagination_and_caps(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+
+    captured = {}
+
+    def _fake_read_sql_df(_sql, params=None):
+        captured["params"] = dict(params or {})
+        return pd.DataFrame(
+            [
+                {
+                    "TXN_DAY": "2026-02-03",
+                    "TXN_MONTH": "2026-02",
+                    "WORKCENTER_GROUP": "WB",
+                    "WORKCENTERNAME": "WB01",
+                    "SPECNAME": "S1",
+                    "PRODUCTLINENAME": "P1",
+                    "PJ_TYPE": "TYPE1",
+                    "LOSSREASONNAME": "R1",
+                    "LOSSREASON_CODE": "001",
+                    "REJECTCATEGORYNAME": "CAT",
+                    "MOVEIN_QTY": 100,
+                    "REJECT_QTY": 3,
+                    "STANDBY_QTY": 1,
+                    "QTYTOPROCESS_QTY": 1,
+                    "INPROCESS_QTY": 1,
+                    "PROCESSED_QTY": 1,
+                    "REJECT_TOTAL_QTY": 7,
+                    "DEFECT_QTY": 2,
+                    "REJECT_RATE_PCT": 7,
+                    "DEFECT_RATE_PCT": 2,
+                    "REJECT_SHARE_PCT": 77.777,
+                    "AFFECTED_LOT_COUNT": 3,
+                    "AFFECTED_WORKORDER_COUNT": 2,
+                    "TOTAL_COUNT": 12,
+                }
+            ]
+        )
+
+    monkeypatch.setattr(svc, "read_sql_df", _fake_read_sql_df)
+
+    result = svc.query_list(
+        start_date="2026-02-01",
+        end_date="2026-02-07",
+        page=2,
+        per_page=500,
+        packages=["PKG1"],
+    )
+
+    assert result["pagination"]["page"] == 2
+    assert result["pagination"]["perPage"] == 200
+    assert result["pagination"]["total"] == 12
+    assert result["pagination"]["totalPages"] == 1
+    assert captured["params"]["offset"] == 200
+    assert captured["params"]["limit"] == 200
+    assert "PKG1" in captured["params"].values()
+
+
+def test_export_csv_contains_semantic_headers(monkeypatch):
+    monkeypatch.setattr(svc, "get_excluded_reasons", lambda force_refresh=False: set())
+    monkeypatch.setattr(
+        svc,
+        "read_sql_df",
+        lambda _sql, _params=None: pd.DataFrame(
+            [
+                {
+                    "TXN_DAY": "2026-02-03",
+                    "TXN_MONTH": "2026-02",
+                    "WORKCENTER_GROUP": "WB",
+                    "WORKCENTERNAME": "WB01",
+                    "SPECNAME": "S1",
+                    "PRODUCTLINENAME": "P1",
+                    "PJ_TYPE": "TYPE1",
+                    "LOSSREASONNAME": "R1",
+                    "LOSSREASON_CODE": "001",
+                    "REJECTCATEGORYNAME": "CAT",
+                    "MOVEIN_QTY": 100,
+                    "REJECT_QTY": 3,
+                    "STANDBY_QTY": 1,
+                    "QTYTOPROCESS_QTY": 1,
+                    "INPROCESS_QTY": 1,
+                    "PROCESSED_QTY": 1,
+                    "REJECT_TOTAL_QTY": 7,
+                    "DEFECT_QTY": 2,
+                    "REJECT_RATE_PCT": 7,
+                    "DEFECT_RATE_PCT": 2,
+                    "REJECT_SHARE_PCT": 77.777,
+                    "AFFECTED_LOT_COUNT": 3,
+                    "AFFECTED_WORKORDER_COUNT": 2,
+                }
+            ]
+        ),
+    )
+
+    chunks = list(
+        svc.export_csv(
+            start_date="2026-02-01",
+            end_date="2026-02-07",
+        )
+    )
+    payload = "".join(chunks)
+
+    assert "REJECT_TOTAL_QTY" in payload
+    assert "DEFECT_QTY" in payload
+    assert "2026-02-03" in payload
diff --git a/tests/test_reject_history_shell_coverage.py b/tests/test_reject_history_shell_coverage.py
new file mode 100644
index 0000000..65686f1
--- /dev/null
+++ b/tests/test_reject_history_shell_coverage.py
@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+"""Governance coverage tests for reject-history shell integration."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+ROUTE_CONTRACTS_FILE = ROOT / 'frontend' / 'src' / 'portal-shell' / 'routeContracts.js'
+NATIVE_REGISTRY_FILE = ROOT / 'frontend' / 'src' / 'portal-shell' / 'nativeModuleRegistry.js'
+PAGE_STATUS_FILE = ROOT / 'data' / 'page_status.json'
+
+
+def test_reject_history_route_contract_entry_exists():
+    text = ROUTE_CONTRACTS_FILE.read_text(encoding='utf-8')
+
+    assert "'/reject-history'" in text
+    assert "routeId: 'reject-history'" in text
+    assert "title: '報廢歷史查詢'" in text
+
+
+def test_reject_history_native_loader_entry_exists():
+    text = NATIVE_REGISTRY_FILE.read_text(encoding='utf-8')
+
+    assert "'/reject-history'" in text
+    assert "import('../reject-history/App.vue')" in text
+
+
+def test_reject_history_page_status_entry_exists():
+    payload = json.loads(PAGE_STATUS_FILE.read_text(encoding='utf-8'))
+    pages = payload.get('pages', [])
+
+    entry = next((item for item in pages if item.get('route') == '/reject-history'), None)
+    assert entry is not None
+    assert entry.get('drawer_id')
+    assert isinstance(entry.get('order'), int)
diff --git a/tests/test_scrap_reason_exclusion_cache.py b/tests/test_scrap_reason_exclusion_cache.py
new file mode 100644
index 0000000..96c8e4f
--- /dev/null
+++ b/tests/test_scrap_reason_exclusion_cache.py
@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+"""Tests for scrap_reason_exclusion_cache service."""
+
+from __future__ import annotations
+
+import json
+from unittest.mock import MagicMock
+
+import pandas as pd
+
+from mes_dashboard.services import scrap_reason_exclusion_cache as cache
+
+
+def _reset_cache_state():
+    with cache._CACHE_LOCK:
+        cache._CACHE["reasons"] = set()
+        cache._CACHE["updated_at"] = None
+        cache._CACHE["loaded"] = False
+        cache._CACHE["source"] = None
+
+
+def test_refresh_cache_loads_enabled_reason_codes(monkeypatch):
+    _reset_cache_state()
+
+    monkeypatch.setattr(cache, "try_acquire_lock", lambda *_args, **_kwargs: True)
+    monkeypatch.setattr(cache, "release_lock", lambda *_args, **_kwargs: None)
+    monkeypatch.setattr(cache, "get_redis_client", lambda: None)
+    monkeypatch.setattr(
+        cache,
+        "read_sql_df",
+        lambda _sql: pd.DataFrame({"REASON_NAME": ["358", " 160 ", "bonus_adjust"]}),
+    )
+
+    assert cache.refresh_cache(force=True) is True
+    assert cache.get_excluded_reasons() == {"358", "160", "BONUS_ADJUST"}
+
+
+def test_refresh_cache_falls_back_to_redis_when_oracle_fails(monkeypatch):
+    _reset_cache_state()
+
+    redis_client = MagicMock()
+    redis_client.get.side_effect = [json.dumps(["A01", "b02"]), "2026-02-13T00:00:00"]
+
+    monkeypatch.setattr(cache, "try_acquire_lock", lambda *_args, **_kwargs: True)
+    monkeypatch.setattr(cache, "release_lock", lambda *_args, **_kwargs: None)
+    monkeypatch.setattr(cache, "get_redis_client", lambda: redis_client)
+
+    def _raise(_sql):
+        raise RuntimeError("oracle unavailable")
+
+    monkeypatch.setattr(cache, "read_sql_df", _raise)
+
+    assert cache.refresh_cache(force=True) is True
+    assert cache.get_excluded_reasons() == {"A01", "B02"}
+
+
+def test_get_excluded_reasons_uses_redis_for_lazy_bootstrap(monkeypatch):
+    _reset_cache_state()
+
+    redis_client = MagicMock()
+    redis_client.get.side_effect = [json.dumps(["X1", "x2"]), "2026-02-13T12:00:00"]
+    monkeypatch.setattr(cache, "get_redis_client", lambda: redis_client)
+    monkeypatch.setattr(cache, "refresh_cache", lambda force=False: True)
+
+    reasons = cache.get_excluded_reasons(force_refresh=False)
+
+    assert reasons == {"X1", "X2"}
diff --git a/tests/test_template_integration.py b/tests/test_template_integration.py
index 8d2a595..d035105 100644
--- a/tests/test_template_integration.py
+++ b/tests/test_template_integration.py
@@ -373,6 +373,7 @@ class TestViteModuleIntegration(unittest.TestCase):
             ('/tables', 'tables.js'),
             ('/resource', 'resource-status.js'),
             ('/resource-history', 'resource-history.js'),
+            ('/reject-history', 'reject-history.js'),
             ('/job-query', 'job-query.js'),
             ('/excel-query', 'excel-query.js'),
             ('/query-tool', 'query-tool.js'),
@@ -396,13 +397,18 @@ class TestViteModuleIntegration(unittest.TestCase):
             response = self.client.get(endpoint, follow_redirects=False)
 
             if endpoint in canonical_routes:
-                self.assertEqual(response.status_code, 302)
-                self.assertTrue(response.location.endswith(canonical_routes[endpoint]))
-                follow = self.client.get(response.location)
-                self.assertEqual(follow.status_code, 200)
-                html = follow.data.decode('utf-8')
-                self.assertIn('/static/dist/portal-shell.js', html)
-                self.assertIn('type="module"', html)
+                if response.status_code == 302:
+                    self.assertTrue(response.location.endswith(canonical_routes[endpoint]))
+                    follow = self.client.get(response.location)
+                    self.assertEqual(follow.status_code, 200)
+                    html = follow.data.decode('utf-8')
+                    self.assertIn('/static/dist/portal-shell.js', html)
+                    self.assertIn('type="module"', html)
+                else:
+                    self.assertEqual(response.status_code, 200)
+                    html = response.data.decode('utf-8')
+                    self.assertIn(f'/static/dist/{asset}', html)
+                    self.assertIn('type="module"', html)
             else:
                 self.assertEqual(response.status_code, 200)
                 html = response.data.decode('utf-8')