diff --git a/3DTank/tools/serve.js b/3DTank/tools/serve.js
index 2eaf25a..f3a7a03 100644
--- a/3DTank/tools/serve.js
+++ b/3DTank/tools/serve.js
@@ -254,6 +254,9 @@ const Server = http.createServer((Req, Res) => {
   const UrlPath = Req.url.split('#')[0];
   // 浏览器 → 本地落盘：控制台脚本把 dump 结果 POST 上来，写到 names/ 下
   //   用法（控制台）：fetch('/__dump__/regdump.json', {method:'POST', body: JSON.stringify(x)})
+  //   *.json 且新旧都是 {entries:[{modelId,...}]} 形态时**按 modelId 合并**：
+  //   modelId → codec 是懒注册的（进车库/商店/战局各注册一批），每个页面会话的累积集不同，
+  //   直接覆盖会把上一轮的注册表冲掉；合并后刷新/关页都不丢数据。
   if (Req.method === 'POST' && UrlPath.startsWith('/__dump__/')) {
     const Name = path.basename(decodeURIComponent(UrlPath.slice('/__dump__/'.length))).replace(/[^\w.\-]/g, '_') || 'dump.json';
     const Out = path.join(PROJECT, 'names', Name);
@@ -261,10 +264,43 @@ const Server = http.createServer((Req, Res) => {
     Req.on('data', (C) => Chunks.push(C));
     Req.on('end', () => {
       try {
-        const Buf = Buffer.concat(Chunks);
+        let Buf = Buffer.concat(Chunks);
+        let Merged = 0;
+        if (/\.json$/i.test(Name)) {
+          try {
+            const NewObj = JSON.parse(Buf.toString('utf8'));
+            if (NewObj && Array.isArray(NewObj.entries)) {
+              let OldObj = null;
+              try {
+                OldObj = JSON.parse(fs.readFileSync(Out, 'utf8'));
+              } catch (E) {
+                OldObj = null;
+              }
+              if (OldObj && Array.isArray(OldObj.entries)) {
+                const Seen = new Set();
+                const All = [];
+                const Push = (E) => {
+                  if (!E || E.modelId === undefined || Seen.has(String(E.modelId))) return;
+                  Seen.add(String(E.modelId));
+                  All.push(E);
+                };
+                OldObj.entries.forEach(Push);
+                NewObj.entries.forEach(Push);
+                Merged = All.length - NewObj.entries.length;
+                NewObj.entries = All;
+                NewObj.count = All.length;
+                NewObj.mergedFrom = OldObj.count;
+                Buf = Buffer.from(JSON.stringify(NewObj), 'utf8');
+              }
+            }
+          } catch (E) {
+            // 不是 JSON 或不是该形态：原样落盘
+          }
+        }
         fs.mkdirSync(path.dirname(Out), { recursive: true });
         fs.writeFileSync(Out, Buf);
-        console.log('[dump] 已写入 ' + Out + '（' + Buf.length + ' 字节）');
+        console.log('[dump] 已写入 ' + Out + '（' + Buf.length + ' 字节' +
+          (Merged ? '，合并新增 ' + Merged + ' 条' : '') + '）');
         Res.writeHead(200, { 'Content-Type': 'text/plain; charset=utf-8' }).end('saved ' + Name + ' ' + Buf.length);
       } catch (Err) {
         console.log('[dump] 写入失败: ' + Err.message);