chore(release): Windows 安装包以 NSIS 为主，MSI 不再主动发布

- CI Windows 构建由 --bundles msi 改为 --bundles nsis
- tauri.conf.json 默认打包目标改为仅 nsis（需要 MSI 可本地 --bundles msi 构建）
- 应用内「检查更新」优先下载 NSIS setup exe，无 exe 的历史版本自动回落 .msi
- 发布说明模板 / README 双语下载说明同步更新，CHANGELOG 记录该分发策略变更
- 测试：Rust 200（资产选择新增 NSIS 优先与 MSI 回落两例）、前端 146

.github/workflows/release.yml

@@ -35,7 +35,7 @@ jobs:
           - platform: macos-latest
             args: --bundles app,dmg
           - platform: windows-latest
-            args: --bundles msi
+            args: --bundles nsis
 
     runs-on: ${{ matrix.platform }}
     steps:
@@ -89,7 +89,7 @@ jobs:
             cat <<'TAIL_EOF'
           ### Downloads by platform
 
-          - **Windows**: `.msi` installer
+          - **Windows**: `.exe`（NSIS 安装包）——自 v0.8.3 起 Windows 以 NSIS 为主，**MSI 不再主动发布**（历史版本的 `.msi` 仍可下载）
           - **macOS**: `.dmg` + `.app`（未签名，仅 Apple Silicon / M 系列芯片）
           - **Linux**: `.deb` / `.AppImage` / `.rpm`
 

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 ---
 
+## Unreleased
+
+- **Windows 安装包改为以 NSIS（`.exe`）为主，MSI 不再主动发布**：CI 的 Windows 构建由 `--bundles msi` 改为 `--bundles nsis`，`tauri.conf.json` 默认打包目标同步改为仅 `nsis`；应用内「检查更新」优先下载 NSIS 安装包（无 exe 的历史版本自动回落 `.msi`）。历史版本的 `.msi` 仍可下载，需要 MSI 可本地 `npx tauri build --bundles msi` 自行构建
+
 ## v0.8.3 (2026-10-15)
 
 配置一致性修复版（含 kimi-code CLI 2.2.0 适配核验）。

README.md

@@ -54,7 +54,7 @@
 
 ## 下载
 
-- **Windows**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.msi`
+- **Windows**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.exe`（NSIS 安装包；**自 v0.8.3 起 Windows 以 NSIS 为主，MSI 不再主动发布**，历史版本 `.msi` 仍可下载）
 - **macOS**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.dmg`（**未签名**，仅 Apple Silicon / M 系列芯片）。安装请下载 Release 附带的 `install-macos.sh` 一键处理：
 
   ```bash
@@ -496,10 +496,10 @@ npm run tauri-build
 产物位置：
 
 ```
-src-tauri/target/release/bundle/msi/Kimi Switch_<version>_x64_en-US.msi
+src-tauri/target/release/bundle/nsis/Kimi.Switch_<version>_x64-setup.exe
 ```
 
-Windows 安装包（MSI），含 WebView2 bootstrapper 自动下载。`nsis` 已禁用，目前只产 MSI。
+Windows 安装包（NSIS setup exe），含 WebView2 bootstrapper 自动下载。自 v0.8.3 起 Windows **只主动发布 NSIS 安装包，MSI 不再主动发布**（如需 MSI 可本地 `npx tauri build --bundles msi` 自行构建）。
 
 ### 首次打包
 
@@ -565,7 +565,7 @@ A: 对 Kimi Code，`config.toml` 本身就是全量权威，直接备份即可
 A: Vertex 需要 GCP project / location 凭证，当前实现留 TODO，等 GCP SDK 集成后补。
 
 **Q: 支持 macOS / Linux 吗？**
-A: 代码不依赖 Windows 专属 API，但 `tauri.conf.json` 的 bundle 目标目前只配了 `msi`。理论上把 `bundle.targets` 改成 `["app", "dmg"]` 等即可跨平台，但未验证。
+A: 代码不依赖 Windows 专属 API，但 `tauri.conf.json` 的 bundle 目标目前只配了 `nsis`。理论上把 `bundle.targets` 改成 `["app", "dmg"]` 等即可跨平台，但未验证。
 
 **Q: 怎么改主题 / 语言？**
 A: 顶部齿轮 → 设置弹窗 → 主题 / 语言。保存到前端 `localStorage`（WebView2），重启后保持。

README_EN.md

@@ -54,7 +54,7 @@
 
 ## Downloads
 
-- **Windows**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.msi`
+- **Windows**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.exe` (NSIS installer; **since v0.8.3 Windows ships NSIS as the primary format and MSI is no longer actively published** — `.msi` files of past releases remain downloadable)
 - **macOS**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.dmg` (**unsigned** — first launch needs right-click → Open to bypass Gatekeeper)
 - **Linux**: [GitHub Releases](https://github.com/billowliu2/KimiSwitch/releases/latest) → `.deb` / `.AppImage` / `.rpm`
 
@@ -486,10 +486,10 @@ npm run tauri-build
 Output:
 
 ```
-src-tauri/target/release/bundle/msi/Kimi Switch_<version>_x64_en-US.msi
+src-tauri/target/release/bundle/nsis/Kimi.Switch_<version>_x64-setup.exe
 ```
 
-A Windows installer (MSI) with the WebView2 bootstrapper embedded for auto-download. `nsis` is disabled; only MSI is produced.
+A Windows installer (NSIS setup exe) with the WebView2 bootstrapper embedded for auto-download. Since v0.8.3 Windows **publishes only the NSIS installer; MSI is no longer actively released** (build it locally with `npx tauri build --bundles msi` if needed).
 
 ### First build
 
@@ -552,7 +552,7 @@ A: For Kimi Code, `config.toml` itself is the authoritative full config — back
 A: Vertex requires GCP project / location credentials. The current implementation leaves a TODO pending GCP SDK integration.
 
 **Q: macOS / Linux support?**
-A: The code doesn't depend on Windows-only APIs, but `tauri.conf.json` only targets `msi` for bundling. In theory, changing `bundle.targets` to `["app", "dmg"]` etc. would enable cross-platform builds, but this is unverified.
+A: The code doesn't depend on Windows-only APIs, but `tauri.conf.json` only targets `nsis` for bundling. In theory, changing `bundle.targets` to `["app", "dmg"]` etc. would enable cross-platform builds, but this is unverified.
 
 **Q: How do I change the theme / language?**
 A: Top-right gear → Settings modal → Theme / Language. Saved to frontend `localStorage` (WebView2), persists across restarts.

src-tauri/src/commands.rs

@@ -1599,7 +1599,8 @@ pub async fn download_update(
     Ok(path_str)
 }
 
-/// Open the downloaded MSI installer using the system default handler.
+/// Open the downloaded installer (NSIS setup exe / dmg / AppImage) using the
+/// system default handler.
 #[tauri::command]
 pub fn open_installer(app: tauri::AppHandle, path: String) -> Result<(), String> {
     use tauri_plugin_opener::OpenerExt;
@@ -1839,27 +1840,38 @@ fn build_kimi_web_window(app: &tauri::AppHandle, url: &tauri::Url) -> Result<(),
     });
     Ok(())
 }
-/// Preference for Linux is AppImage (portable, no install). If the preferred
+/// Preference for Linux is AppImage (portable, no install). Windows prefers
-/// extension is not present, returns None so the UI can fall back to
+/// the NSIS `-setup.exe` (MSI is no longer actively published since v0.8.3)
-/// "open release page" instead of guessing a less-preferred format.
+/// and falls back to `.msi` for releases that predate the switch. If the
+/// preferred extension is not present, returns None so the UI can fall back
+/// to "open release page" instead of guessing a less-preferred format.
 fn pick_asset_for_os(assets: &[serde_json::Value], os: &str) -> Option<String> {
-    let target_ext = match os {
+    let (preferred, fallback) = match os {
-        "macos" => "dmg",
+        "macos" => ("dmg", None),
-        "linux" => "AppImage",
+        "linux" => ("AppImage", None),
-        "windows" => "msi",
+        "windows" => ("setup.exe", Some("msi")),
         _ => return None,
     };
+    asset_url_ending_with(assets, preferred)
+        .or_else(|| fallback.and_then(|ext| asset_url_ending_with(assets, ext)))
+        .map(str::to_string)
+}
+
+/// Download URL of the first release asset whose name ends with `ext`.
+fn asset_url_ending_with<'a>(
+    assets: &'a [serde_json::Value],
+    ext: &str,
+) -> Option<&'a str> {
     assets
         .iter()
         .find(|a| {
             a.get("name")
                 .and_then(|n| n.as_str())
-                .map(|n| n.ends_with(target_ext))
+                .map(|n| n.ends_with(ext))
                 .unwrap_or(false)
         })
         .and_then(|a| a.get("browser_download_url"))
         .and_then(|v| v.as_str())
-        .map(|s| s.to_string())
 }
 
 /// Pick the GitHub release asset for the current OS (runtime target).
@@ -1872,7 +1884,10 @@ fn update_temp_filename() -> String {
     let ext = match std::env::consts::OS {
         "macos" => "dmg",
         "linux" => "AppImage",
-        "windows" => "msi",
+        // The preferred Windows installer is the NSIS setup exe; the fallback
+        // (.msi, pre-v0.8.3-releases) keeps its own extension via the same
+        // suffix match, so "exe" covers the actively published format.
+        "windows" => "exe",
         _ => "bin",
     };
     format!("KimiSwitch_update.{ext}")
@@ -2160,10 +2175,28 @@ mod asset_picker_tests {
     }
 
     #[test]
-    fn windows_picks_msi() {
+    fn windows_prefers_nsis_setup_exe_over_msi() {
-        let assets = assets(&["KimiSwitch_0.7.0_x64_en-US.msi", "KimiSwitch_0.7.0_aarch64.dmg", "KimiSwitch_0.7.0_amd64.AppImage"]);
+        let assets = assets(&[
+            "Kimi.Switch_0.8.3_x64_en-US.msi",
+            "Kimi.Switch_0.8.3_x64-setup.exe",
+            "Kimi.Switch_0.8.3_aarch64.dmg",
+        ]);
         let url = pick_asset_for_os(&assets, "windows");
-        assert_eq!(url.as_deref(), Some("https://example.com/KimiSwitch_0.7.0_x64_en-US.msi"));
+        assert_eq!(
+            url.as_deref(),
+            Some("https://example.com/Kimi.Switch_0.8.3_x64-setup.exe")
+        );
+    }
+
+    #[test]
+    fn windows_falls_back_to_msi_when_no_setup_exe() {
+        // Pre-v0.8.3 releases (and older Gitea releases) ship only the .msi.
+        let assets = assets(&["Kimi.Switch_0.8.2_x64_en-US.msi"]);
+        let url = pick_asset_for_os(&assets, "windows");
+        assert_eq!(
+            url.as_deref(),
+            Some("https://example.com/Kimi.Switch_0.8.2_x64_en-US.msi")
+        );
     }
 
     #[test]

src-tauri/tauri.conf.json

@@ -27,7 +27,6 @@
   "bundle": {
     "active": true,
     "targets": [
-      "msi",
       "nsis"
     ],
     "icon": [