feat: problems local stats, user status, admin panel enhancements, rating text

- Problems page: replace Luogu pass rate with local submission stats
  (local_submit_count, local_ac_count)
- Problems page: add user AC/fail status column (user_ac, user_fail_count)
- Admin users: add total_submissions and total_ac columns
- Admin users: add detail panel with submissions/rating/redeem tabs
- Admin: new endpoint GET /api/v1/admin/users/{id}/rating-history
- Rating history: note field includes problem title via JOIN
- Me page: translate task codes to friendly labels with icons
- Me page: problem links in rating history are clickable
- Wrong book service, learning note scoring, note image controller
- Backend SQL uses batch queries for performance

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/app/me/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useEffect, useMemo, useState } from "react";
+import React, { useEffect, useMemo, useState } from "react";
 import {
   ArrowRightLeft,
   Calendar,
@@ -135,6 +135,33 @@ export default function MePage() {
     return name;
   };
 
+  const formatRatingNote = (note: string, type: string): React.ReactNode => {
+    // Daily task codes
+    const taskLabels: Record<string, [string, string]> = {
+      login_checkin: ["每日签到 🎯", "Daily Sign-in 🎯"],
+      daily_submit: ["每日提交 📝", "Daily Submission 📝"],
+      first_ac: ["首次通过 ⭐", "First AC ⭐"],
+      code_quality: ["代码质量 🛠️", "Code Quality 🛠️"],
+    };
+    if (type === "daily_task" && taskLabels[note]) {
+      return isZh ? taskLabels[note][0] : taskLabels[note][1];
+    }
+    // Solution view: "Problem 1234:Title"
+    const m = note.match(/^Problem (\d+):(.*)$/);
+    if (m) {
+      const pid = m[1];
+      const title = m[2].trim();
+      return (
+        <a href={`/problems/${pid}`} className="hover:underline text-[color:var(--mc-diamond)]">
+          {isZh ? `查看题解 P${pid}` : `View Solution P${pid}`}
+          {title ? ` · ${title}` : ""}
+        </a>
+      );
+    }
+    // Redeem items keep original text
+    return note;
+  };
+
   const loadAll = async () => {
     setLoading(true);
     setError("");
@@ -388,7 +415,7 @@ export default function MePage() {
                   {item.change > 0 ? <TrendingUp size={14} /> : <TrendingDown size={14} />}
                   {item.change > 0 ? `+${item.change}` : item.change}
                 </span>
-                <span className="ml-2">{item.note}</span>
+                <span className="ml-2">{formatRatingNote(item.note, item.type)}</span>
               </span>
               <span className="text-[color:var(--mc-stone-dark)]">
                 {new Date(item.created_at * 1000).toLocaleString()}