feat: note scoring 60/6 with rating award + Minecraft theme

- Score max changed from 100 to 60, rating max from 10 to 6
- Note scoring now awards actual rating points (delta-based)
- Re-scoring only awards/deducts the difference
- Rating history shows note_score entries with problem link
- LLM prompt includes problem statement context for better evaluation
- LLM scoring dimensions: 题意理解/思路算法/代码记录/踩坑反思 (15 each)
- Minecraft-themed UI: 矿石鉴定, 探索笔记, 存入宝典, etc.
- Fallback scoring adjusted for 60-point scale
- Handle LLM markdown code fence wrapping in response

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

frontend/src/app/me/page.tsx

@@ -143,8 +143,19 @@ export default function MePage() {
       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];
+    if (type === "daily_task") {
+      if (taskLabels[note]) {
+        return isZh ? taskLabels[note][0] : taskLabels[note][1];
+      }
+      // Note score: "note_score_1234"
+      const ns = note.match(/^note_score_(\d+)$/);
+      if (ns) {
+        return (
+          <a href={`/problems/${ns[1]}`} className="hover:underline text-[color:var(--mc-diamond)]">
+            {isZh ? `📜 探索笔记鉴定 P${ns[1]}` : `📜 Note Appraisal P${ns[1]}`}
+          </a>
+        );
+      }
     }
     // Solution view: "Problem 1234:Title"
     const m = note.match(/^Problem (\d+):(.*)$/);

frontend/src/app/problems/[id]/page.tsx

@@ -1031,15 +1031,15 @@ export default function ProblemDetailPage() {
 
             <div className="mt-5 rounded border-[3px] border-black bg-[color:var(--mc-plank)] p-3 shadow-[3px_3px_0_rgba(0,0,0,0.45)]">
               <div className="flex items-center justify-between gap-2">
-                <h3 className="font-bold text-black">{tx("学习笔记（看完视频后上传/粘贴）", "Learning Notes (paste after watching)")}</h3>
-                <span className="text-xs text-zinc-700">{tx("满分100分 = rating 10分", "100 pts = rating 10")}</span>
+                <h3 className="font-bold text-black">📜 {tx("探索笔记（看完视频后记录）", "Explorer Notes (record after watching)")}</h3>
+                <span className="text-xs text-zinc-700">⚡ {tx("满分60 = 经验值+6", "Max 60 = +6 XP")}</span>
               </div>
 
               <textarea
                 className="mt-2 w-full rounded-none border-[2px] border-black bg-[color:var(--mc-plank-light)] p-2 text-xs text-black shadow-[2px_2px_0_rgba(0,0,0,0.35)]"
                 rows={8}
                 value={noteText}
-                placeholder={tx("建议写：学习目标/关键概念/代码模板/踩坑与修复/总结", "Suggested: goals / key ideas / code template / pitfalls / summary")}
+                placeholder={tx("⛏️ 记录你的探索：题意理解/解题思路/代码配方/踩坑与修复/总结", "⛏️ Log your adventure: problem understanding / approach / code recipe / pitfalls / summary")}
                 onChange={(e) => setNoteText(e.target.value)}
               />
 
@@ -1054,17 +1054,17 @@ export default function ProblemDetailPage() {
                     onChange={(e) => void handleNoteImageFiles(e.target.files)}
                     disabled={noteUploading}
                   />
-                  {noteUploading ? tx("上传中...", "Uploading...") : tx("拍照/上传图片", "Upload Photos")}
+                  {noteUploading ? tx("传送中...", "Teleporting...") : tx("📷 截图上传", "📷 Upload Screenshot")}
                 </label>
                 <button className="mc-btn mc-btn-success text-xs" onClick={() => void saveLearningNote()} disabled={noteSaving}>
-                  {noteSaving ? tx("保存中...", "Saving...") : tx("保存笔记", "Save")}
+                  {noteSaving ? tx("刻录中...", "Engraving...") : tx("💾 存入宝典", "💾 Save to Codex")}
                 </button>
-                <button className="mc-btn text-xs" onClick={() => void scoreLearningNote()} disabled={noteScoring}>
-                  {noteScoring ? tx("评分中...", "Scoring...") : tx("笔记评分", "Score")}
+                <button className="mc-btn mc-btn-primary text-xs" onClick={() => void scoreLearningNote()} disabled={noteScoring}>
+                  {noteScoring ? tx("⛏️ 鉴定中...", "⛏️ Appraising...") : tx("⛏️ 矿石鉴定", "⛏️ Appraise Ore")}
                 </button>
                 {noteScore !== null && noteRating !== null && (
-                  <span className="text-xs text-black self-center">
-                    {tx("得分：", "Score: ")}{noteScore}/100 · {tx("评级：", "Rating: ")}{noteRating}/10
+                  <span className="text-xs text-black self-center font-bold">
+                    💎 {noteScore}/60 · ⚡ +{noteRating} XP
                   </span>
                 )}
               </div>