ykxmz 1.5.0：手表端 TLS 证书兼容 + 三端分开打包 + 下载区

手表端
- 内置 GTS Root R4 / GlobalSign Root CA
  修 SSLHandshakeException: Chain validation failed
- 连接错误翻译成人话：证书 / 时间 / 解析 / 超时分别给提示
- 经中转连上后用服务器报的地址刷新已配对记录
- 版本号 1.3.0 -> 1.5.0（AndroidManifest 之前漏改了）

服务器端
- 支持 chunked 请求体，修每 16 秒一次的连接错乱与大面积 502
- 网络调优 net-tune.sh（开机自动应用）
- 新增下载区，管理页加下载卡片
- 隧道改 HTTP/2 + 双连接

打包方式变更
- 从一个合并 zip 改成三个独立产物：
    ykxmz-agent-*.zip    被控端
    ykxmz-server-*.zip   服务器端
    ykxmz-watch-*.apk    控制端

_build/upload_downloads.py

@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+r"""两件事：
+1. 给 verify_all.ps1 补回 UTF-8 BOM
+   （edit 工具写出来不带 BOM，PowerShell 里中文会乱码）
+2. 把三个成品上传到设备的下载目录
+"""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(r"C:\Users\shu\Desktop\deepseekagent\LanRemote")
+sys.path.insert(0, str(ROOT / "_build"))
+
+from devssh import run, upload          # noqa: E402
+
+VERIFY = ROOT / "_tests" / "verify_all.ps1"
+
+UPLOADS = [
+    ("dist/ykxmz-agent-1.5.0.zip",
+     "/root/lanremote-relay/downloads/ykxmz-agent-1.5.0.zip"),
+    ("dist/ykxmz-server-1.5.0.zip",
+     "/root/lanremote-relay/downloads/ykxmz-server-1.5.0.zip"),
+    ("dist/ykxmz-watch-1.5.0.apk",
+     "/root/lanremote-relay/downloads/ykxmz-watch-1.5.0.apk"),
+    ("dist/ykxmz-watch-1.5.0-说明.txt",
+     "/root/lanremote-relay/downloads/ykxmz-watch-1.5.0-说明.txt"),
+]
+
+
+def main() -> int:
+    # ---- 1. 补 BOM ----
+    raw = VERIFY.read_bytes()
+    if raw.startswith(b"\xef\xbb\xbf"):
+        print("  verify_all.ps1: BOM 正常")
+    else:
+        VERIFY.write_bytes(b"\xef\xbb\xbf" + raw)
+        print("  verify_all.ps1: 补回了 UTF-8 BOM")
+
+    # ---- 2. 建目录 ----
+    run("mkdir -p /root/lanremote-relay/downloads", timeout=30)
+    run("rm -f /root/lanremote-relay/downloads/ykxmz-1.5.0.zip", timeout=30)
+
+    # ---- 3. 上传 ----
+    print()
+    print("  上传成品：")
+    for local, remote in UPLOADS:
+        src = ROOT / local
+        if not src.is_file():
+            print(f"    [跳过] {local} 不存在")
+            continue
+        try:
+            upload(str(src), remote, 0o644)
+            size = src.stat().st_size
+            print(f"    ✓ {src.name}  ({size / 1024 / 1024:.2f} MB)")
+        except Exception as exc:                      # noqa: BLE001
+            print(f"    ✗ {src.name}: {exc}")
+
+    # ---- 4. 确认 ----
+    print()
+    code, out, _err = run(
+        "ls -la /root/lanremote-relay/downloads/ | tail -8", timeout=30)
+    print(out)
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())