build(packaging): 产物改名成 名字_版本号_平台_架构

用户令：产物名不带实现细节字样（不出现 iced），格式统一成
`<名字>_<版本号>_<平台>_<架构>`，下划线分段。

- make_artifacts.py 新增 asset_stem() 作为唯一真相源；Windows 裸 exe 那条
  路径原来还硬写着旧格式，一并改掉
- release.yml 的 sha256sum 与 assets glob 从 unlucky-launcher-* 改
  unlucky-launcher_*（不改会因匹配不到而漏传产物）
- packaging/README.md 矩阵六行同步，并记下：Linux/macOS 仍为 tar.gz，
  理由是许可文本随包 + tar 保留 755 可执行位

本地已跑通：unlucky-launcher_0.1.0_windows_x64.exe 14.44 MiB +
ull_0.1.0_windows_x64.exe 6.18 MiB + SHA256SUMS.txt。

packaging/make_artifacts.py

@@ -3,15 +3,19 @@
 
 Release matrix (see `packaging/README.md` for the full contract):
 
-    Windows x64     unlucky-launcher-<ver>-windows-x64.exe      (bare exe, no zip)
-    Windows arm64   unlucky-launcher-<ver>-windows-arm64.exe    (bare exe, cross-built)
-    Linux x64       unlucky-launcher-<ver>-linux-x64.tar.gz
-    Linux arm64     unlucky-launcher-<ver>-linux-arm64.tar.gz
-    macOS arm64     unlucky-launcher-<ver>-macos-arm64.tar.gz
-    macOS x64       unlucky-launcher-<ver>-macos-x64.tar.gz
-    every slot      ull-<ver>-<slot>[.exe]                      (bare CLI binary, no archive)
+    Windows x64     unlucky-launcher_<ver>_windows_x64.exe      (bare exe, no zip)
+    Windows arm64   unlucky-launcher_<ver>_windows_arm64.exe    (bare exe, cross-built)
+    Linux x64       unlucky-launcher_<ver>_linux_x64.tar.gz
+    Linux arm64     unlucky-launcher_<ver>_linux_arm64.tar.gz
+    macOS arm64     unlucky-launcher_<ver>_macos_arm64.tar.gz
+    macOS x64       unlucky-launcher_<ver>_macos_x64.tar.gz
+    every slot      ull_<ver>_<platform>_<arch>[.exe]           (bare CLI binary, no archive)
     all             SHA256SUMS.txt
 
+Naming rule (user's call, 2026-11-05): `<name>_<version>_<platform>_<arch>`, underscore
+separated, and **no implementation detail in the file name** — the asset never says which UI
+framework produced it. `asset_stem()` is the single source of truth for that.
+
 `--version` is taken from the cargo workspace so a tag can never drift away from
 `Cargo.toml`; pass `--version` to cross-check a tag against it (mismatch is fatal).
 The archives carry the launcher binary plus LICENSE / NOTICE / README.md, which is
@@ -205,9 +209,20 @@ def write_sums(out_dir: Path, assets: list[Path]) -> Path:
     return sums
 
 
+def asset_stem(name: str, version: str, slot: str) -> str:
+    """`<name>_<version>_<platform>_<arch>` — 产物命名的唯一真相源。
+
+    用户令（2026-11-05）：产物名按 `名字_版本号_平台_架构` 下划线分段，且**不得出现 `iced`
+    这类实现细节字样** —— 下载的人不该关心我们内部用哪个 UI 框架。槽位键（`windows-x64`）
+    仍是脚本内部的写法，落到文件名时拆成 `windows_x64` 两段。
+    """
+    family, arch, _kind = SLOTS[slot]
+    return f"{name}_{version}_{family}_{arch}"
+
+
 def stage_cli(out_dir: Path, version: str, slot: str, cli: Path) -> Path:
-    """Copy the CLI out as its own bare asset (`ull-<ver>-<slot>[.exe]`)."""
-    name = f"{CLI_BIN}-{version}-{slot}" + (".exe" if cli.suffix == ".exe" else "")
+    """Copy the CLI out as its own bare asset (`ull_<ver>_<platform>_<arch>[.exe]`)."""
+    name = asset_stem(CLI_BIN, version, slot) + (".exe" if cli.suffix == ".exe" else "")
     asset = out_dir / name
     shutil.copy2(cli, asset)
     # 裸文件下载即可运行：Windows 宿主机上源文件没有 x 位，这里补上（UNIX 侧才有意义）。
@@ -217,7 +232,7 @@ def stage_cli(out_dir: Path, version: str, slot: str, cli: Path) -> Path:
 
 def stage_archive(out_dir: Path, tag: str, version: str, launcher: Path) -> Path:
     """tar.gz with one top-level dir holding the binary + compliance docs."""
-    stem = f"unlucky-launcher-{version}-{tag}"
+    stem = asset_stem(LAUNCHER_ASSET, version, tag)
     stage = out_dir / stem
     if stage.exists():
         shutil.rmtree(stage)
@@ -281,7 +296,7 @@ def main() -> int:
     out_dir.mkdir(parents=True, exist_ok=True)
 
     if kind == "exe":
-        asset = out_dir / f"unlucky-launcher-{version}-{slot}.exe"
+        asset = out_dir / f"{asset_stem(LAUNCHER_ASSET, version, slot)}.exe"
         shutil.copy2(launcher, asset)
     else:
         asset = stage_archive(out_dir, slot, version, launcher)