feat(admin,api,player): 返水流程优化、账单详情与数据库重置

优化返水预览/确认/作废，新增玩家账变详情与后台一键重置为 seed 数据，并修复 dev 启动时 3000 端口占用。

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/ensure-port-free.mjs

@@ -0,0 +1,39 @@
+import { execSync } from 'node:child_process';
+
+const port = process.argv[2] ?? '3000';
+
+function killWindows(portNum) {
+  let out = '';
+  try {
+    out = execSync(`netstat -ano | findstr :${portNum}`, { encoding: 'utf8' });
+  } catch {
+    return;
+  }
+
+  const pids = new Set();
+  for (const line of out.split('\n')) {
+    if (!line.includes('LISTENING')) continue;
+    const pid = line.trim().split(/\s+/).at(-1);
+    if (pid && pid !== '0') pids.add(pid);
+  }
+
+  for (const pid of pids) {
+    try {
+      console.log(`[ensure-port-free] freeing :${portNum} (PID ${pid})`);
+      execSync(`taskkill /F /PID ${pid}`, { stdio: 'ignore' });
+    } catch {
+      // already gone
+    }
+  }
+}
+
+function killUnix(portNum) {
+  try {
+    execSync(`lsof -ti tcp:${portNum} | xargs -r kill -9`, { stdio: 'ignore' });
+  } catch {
+    // port already free
+  }
+}
+
+if (process.platform === 'win32') killWindows(port);
+else killUnix(port);