修发行版重复附件：重发前先删同名

Gitea 的发行版复用逻辑有 bug：发现标签已有发行版就复用，
但**没有先删同名附件**，于是每跑一次就多传一份。
调试期间同一个文件在 EzHub 上堆了 3 份（共 8 个附件，实际只要 3 个）。

修法：复用已有发行版时，先列出它的附件，
把和本次要传的同名的删掉，再传。

配套加了：
  * clean_ezhub_assets.py  清理已堆积的重复（同名只留最新，支持 --dry）
  * verify_releases.py     对账两个平台的发行版（标题/说明/附件/
                           管理页字眼/两边说明是否一致）

已清理：EzHub 从 8 个附件降到 3 个。

_build/verify_releases.py

@@ -0,0 +1,97 @@
+# -*- coding: utf-8 -*-
+r'''验证两个平台的发行版：标签、说明、附件。'''
+from __future__ import annotations
+
+import json
+import urllib.request
+from pathlib import Path
+
+GITEE_TOKEN = (Path(r"C:\Users\shu\Desktop\deepseekagent\LanRemote"
+                    r"\_build\.gitee_token").read_text(encoding="utf-8").strip())
+EZHUB_TOKEN = (Path.home() / ".ykxmz" / "ezhub_token").read_text(
+    encoding="utf-8").strip()
+
+TAG = "v1.8.0"
+EXPECT = ["ykxmz-setup-1.8.0.exe", "ykxmz-server-1.8.0.zip",
+          "ykxmz-watch-1.8.0.apk"]
+
+
+def fetch(url: str, token: str, kind: str):
+    headers = {"User-Agent": "ykxmz-verify"}
+    if kind == "gitee":
+        url += ("&" if "?" in url else "?") + "access_token=" + token
+    else:
+        headers["Authorization"] = "token " + token
+    with urllib.request.urlopen(
+            urllib.request.Request(url, headers=headers), timeout=60) as resp:
+        return json.loads(resp.read().decode("utf-8", "replace"))
+
+
+def check(name: str, release: dict, web: str) -> None:
+    print("  ═══ %s ═══" % name)
+    print("    标题: %s" % release.get("name"))
+    print("    标签: %s" % release.get("tag_name"))
+    print("    页面: %s" % (release.get("html_url") or web))
+
+    body = release.get("body") or ""
+    print("    说明: %d 字符 / %d 行" % (len(body), body.count("\n") + 1))
+    first = (body.strip().splitlines() or [""])[0]
+    print("    首行: %s" % first[:70])
+
+    # 对外口径：不许出现管理页字眼
+    bad = [w for w in ("zhongzhuanzhan", "/admin", "管理后台", "管理页")
+           if w in body]
+    print("    管理页字眼: %s" % ("**有 " + str(bad) + "**" if bad else "无 ✓"))
+
+    assets = (release.get("assets") or release.get("attach_files") or [])
+    print("    附件 %d 个:" % len(assets))
+    names = []
+    for a in assets:
+        aname = a.get("name") or a.get("filename") or "?"
+        size = a.get("size") or 0
+        names.append(aname)
+        print("      %-32s %8.2f MB" % (aname, size / 1024 / 1024))
+    missing = [e for e in EXPECT if e not in names]
+    print("    三个产物齐全: %s" % ("**缺 " + str(missing) + "**"
+                                    if missing else "✓"))
+    print()
+
+
+def main() -> int:
+    print("  一、Gitee")
+    try:
+        r = fetch("https://gitee.com/api/v5/repos/xmz7891/ykxmz"
+                  "/releases/tags/" + TAG, GITEE_TOKEN, "gitee")
+        check("Gitee", r, "https://gitee.com/xmz7891/ykxmz/releases/tag/" + TAG)
+    except Exception as exc:                          # noqa: BLE001
+        print("    查询失败: %s" % exc)
+        print()
+
+    print("  二、EzHub")
+    try:
+        r = fetch("https://git.261826.xyz/api/v1/repos/xmz/ykxmz"
+                  "/releases/tags/" + TAG, EZHUB_TOKEN, "gitea")
+        check("EzHub", r,
+              "https://git.261826.xyz/xmz/ykxmz/releases/tag/" + TAG)
+    except Exception as exc:                          # noqa: BLE001
+        print("    查询失败: %s" % exc)
+        print()
+
+    print("  三、两边的说明是否一致")
+    try:
+        g = fetch("https://gitee.com/api/v5/repos/xmz7891/ykxmz"
+                  "/releases/tags/" + TAG, GITEE_TOKEN, "gitee").get("body")
+        e = fetch("https://git.261826.xyz/api/v1/repos/xmz/ykxmz"
+                  "/releases/tags/" + TAG, EZHUB_TOKEN, "gitea").get("body")
+        same = (g or "").strip() == (e or "").strip()
+        print("    %s" % ("✓ 完全一致" if same else "✗ 不一致"))
+        if not same:
+            print("      Gitee %d 字符 / EzHub %d 字符"
+                  % (len(g or ""), len(e or "")))
+    except Exception as exc:                          # noqa: BLE001
+        print("    对比失败: %s" % exc)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())