diff --git a/.gitignore b/.gitignore
index 18b1f9d..1013e8e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,9 +20,14 @@ build/
 docs/spikes/node_modules/
 docs/spikes/endpoints-*.json
 
-# 本地判题验收数据来自生产测试点，只读挂载，不进入版本库
-data/test_case/
-data/judge_server/
+# data/ 整个目录都是运行时数据，一律不进版本库。
+#
+# 必须写成整目录：原来只忽略了 test_case/ 和 judge_server/，而
+# docker/compose.*.yml 会在这里生成 data/postgres/（**整个数据库**，含
+# raw_password 明文列）、data/redis/、data/backend/（学生上传的文件）。
+# 阶段 5 演练时 `git add -A` 差一点就把生产库快照提交上去，只因为 postgres
+# 容器用的是别的 uid、目录读不了才失败。别再收窄这条。
+data/
 
 # 生产题目样本只用于本地验收，不进入 git
 *.csv
diff --git a/apps/web/src/oj/class/pk.vue b/apps/web/src/oj/class/pk.vue
index 76dbaec..eaf3cd2 100644
--- a/apps/web/src/oj/class/pk.vue
+++ b/apps/web/src/oj/class/pk.vue
@@ -57,9 +57,9 @@ interface ClassComparison {
   q3_ac: number
   iqr: number
   std_dev: number
-  top_10_avg: number
-  middle_80_avg: number
-  bottom_10_avg: number
+  top10_avg: number
+  middle80_avg: number
+  bottom10_avg: number
   excellent_rate: number
   pass_rate: number
   active_rate: number
@@ -68,7 +68,7 @@ interface ClassComparison {
   recent_total_ac?: number
   recent_avg_ac?: number
   recent_median_ac?: number
-  recent_top_10_avg?: number
+  recent_top10_avg?: number
   recent_active_count?: number
 }
 
@@ -176,7 +176,7 @@ async function analyzeWithAI() {
   if (csrfToken) headers["X-CSRFToken"] = csrfToken
 
   try {
-    const response = await fetch("/api2/ai/class-pk-analysis", {
+    const response = await fetch("/api/ai/class-pk-analysis", {
       method: "POST",
       headers,
       body: JSON.stringify({
@@ -382,7 +382,7 @@ const top10AvgChartData = computed(() => {
   const datasets = [
     {
       label: "前10%平均",
-      data: comparisons.value.map((c) => c.top_10_avg),
+      data: comparisons.value.map((c) => c.top10_avg),
       backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
       borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
       borderWidth: 2,
@@ -400,7 +400,7 @@ const bottom10AvgChartData = computed(() => {
   const datasets = [
     {
       label: "后10%平均",
-      data: comparisons.value.map((c) => c.bottom_10_avg),
+      data: comparisons.value.map((c) => c.bottom10_avg),
       backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
       borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
       borderWidth: 2,
@@ -418,7 +418,7 @@ const middle80AvgChartData = computed(() => {
   const datasets = [
     {
       label: "中间80%均值",
-      data: comparisons.value.map((c) => c.middle_80_avg),
+      data: comparisons.value.map((c) => c.middle80_avg),
       backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
       borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
       borderWidth: 2,
@@ -640,35 +640,35 @@ const tableColumns: DataTableColumn<ClassComparison>[] = [
   },
   {
     title: "前10%均值",
-    key: "top_10_avg",
+    key: "top10_avg",
     width: 100,
     render: (row) =>
       h(
         "span",
         { style: { color: "#cf1322", fontWeight: "600" } },
-        row.top_10_avg.toFixed(2),
+        row.top10_avg.toFixed(2),
       ),
   },
   {
     title: "中间80%均值",
-    key: "middle_80_avg",
+    key: "middle80_avg",
     width: 110,
     render: (row) =>
       h(
         "span",
         { style: { color: "#389e0d", fontWeight: "600" } },
-        row.middle_80_avg.toFixed(2),
+        row.middle80_avg.toFixed(2),
       ),
   },
   {
     title: "后10%均值",
-    key: "bottom_10_avg",
+    key: "bottom10_avg",
     width: 100,
     render: (row) =>
       h(
         "span",
         { style: { color: "#096dd9", fontWeight: "500" } },
-        row.bottom_10_avg.toFixed(2),
+        row.bottom10_avg.toFixed(2),
       ),
   },
   {
@@ -956,17 +956,17 @@ const radarChartOptions = {
                 <!-- 分层统计 -->
                 <n-descriptions-item label="前10%均值">
                   <span style="color: #cf1322; font-weight: 600">{{
-                    classData.top_10_avg.toFixed(2)
+                    classData.top10_avg.toFixed(2)
                   }}</span>
                 </n-descriptions-item>
                 <n-descriptions-item label="中间80%均值">
                   <span style="color: #389e0d; font-weight: 600">{{
-                    classData.middle_80_avg.toFixed(2)
+                    classData.middle80_avg.toFixed(2)
                   }}</span>
                 </n-descriptions-item>
                 <n-descriptions-item label="后10%均值">
                   <span style="color: #096dd9; font-weight: 500">{{
-                    classData.bottom_10_avg.toFixed(2)
+                    classData.bottom10_avg.toFixed(2)
                   }}</span>
                 </n-descriptions-item>
 
@@ -1049,7 +1049,7 @@ const radarChartOptions = {
                   </n-descriptions-item>
                   <n-descriptions-item label="时间段前10名平均">
                     <span style="color: #ff4d4f; font-weight: 600">{{
-                      classData.recent_top_10_avg?.toFixed(2)
+                      classData.recent_top10_avg?.toFixed(2)
                     }}</span>
                   </n-descriptions-item>
                   <n-descriptions-item label="活跃学生数" :span="2">
diff --git a/apps/web/src/oj/problem/components/SubmissionResult.vue b/apps/web/src/oj/problem/components/SubmissionResult.vue
index 25c6d4c..dc8bf66 100644
--- a/apps/web/src/oj/problem/components/SubmissionResult.vue
+++ b/apps/web/src/oj/problem/components/SubmissionResult.vue
@@ -83,7 +83,7 @@ async function fetchHint(submissionId: string) {
       headers["X-CSRFToken"] = csrfToken
     }
 
-    const response = await fetch("/api2/ai/hint", {
+    const response = await fetch("/api/ai/hint", {
       method: "POST",
       headers,
       body: JSON.stringify({ submissionId }),
diff --git a/apps/web/src/oj/rank/list.vue b/apps/web/src/oj/rank/list.vue
index 505bc30..14e94c3 100644
--- a/apps/web/src/oj/rank/list.vue
+++ b/apps/web/src/oj/rank/list.vue
@@ -95,7 +95,7 @@ async function analyzeSingleClassWithAI() {
   if (csrfToken) headers["X-CSRFToken"] = csrfToken
 
   try {
-    const response = await fetch("/api2/ai/class-analysis", {
+    const response = await fetch("/api/ai/class-analysis", {
       method: "POST",
       headers,
       body: JSON.stringify({ comparison: classDetailData.value }),
@@ -158,9 +158,9 @@ interface ClassComparison {
   q3_ac: number
   iqr: number
   std_dev: number
-  top_10_avg: number
-  middle_80_avg: number
-  bottom_10_avg: number
+  top10_avg: number
+  middle80_avg: number
+  bottom10_avg: number
   excellent_rate: number
   pass_rate: number
   active_rate: number
@@ -719,17 +719,17 @@ watch(
           </n-descriptions-item>
           <n-descriptions-item label="前10%均值">
             <span style="color: #cf1322; font-weight: 600">{{
-              classDetailData.top_10_avg.toFixed(2)
+              classDetailData.top10_avg.toFixed(2)
             }}</span>
           </n-descriptions-item>
           <n-descriptions-item label="中间80%均值">
             <span style="color: #389e0d; font-weight: 600">{{
-              classDetailData.middle_80_avg.toFixed(2)
+              classDetailData.middle80_avg.toFixed(2)
             }}</span>
           </n-descriptions-item>
           <n-descriptions-item label="后10%均值">
             <span style="color: #096dd9; font-weight: 500">{{
-              classDetailData.bottom_10_avg.toFixed(2)
+              classDetailData.bottom10_avg.toFixed(2)
             }}</span>
           </n-descriptions-item>
           <n-descriptions-item label="人数">
diff --git a/apps/web/src/oj/store/ai.ts b/apps/web/src/oj/store/ai.ts
index 95ef9c5..2e66c95 100644
--- a/apps/web/src/oj/store/ai.ts
+++ b/apps/web/src/oj/store/ai.ts
@@ -104,7 +104,7 @@ export const useAIStore = defineStore("ai", () => {
     }
 
     try {
-      const response = await fetch("/api2/ai/analysis", {
+      const response = await fetch("/api/ai/analysis", {
         method: "POST",
         headers,
         body: JSON.stringify({
diff --git a/apps/web/src/utils/download.ts b/apps/web/src/utils/download.ts
index d2f4e5c..62ebf40 100644
--- a/apps/web/src/utils/download.ts
+++ b/apps/web/src/utils/download.ts
@@ -1,9 +1,9 @@
 import axios from "axios"
 
-// 指向新后端的 /api2/admin。响应是 zip 二进制，不走 { error, data } 信封，
+// 指向新后端的 /api/admin。响应是 zip 二进制，不走 { error, data } 信封，
 // 所以不能复用 utils/api2 的拦截器（它会把 response.data.data 取出来）。
 const http = axios.create({
-  baseURL: "/api2/admin",
+  baseURL: "/api/admin",
   responseType: "blob",
   withCredentials: true,
 })