diff --git a/build/capareport-server.spec b/build/capareport-server.spec
index f117c7b..791c736 100644
--- a/build/capareport-server.spec
+++ b/build/capareport-server.spec
@@ -62,7 +62,7 @@ if onefile:
         bootloader_ignore_signals=False,
         strip=False,
         upx=True,
-        console=True,
+        console=False,
         disable_windowed_traceback=False,
         argv_emulation=False,
         target_arch=None,
diff --git a/docs/project_context.md b/docs/project_context.md
index a591535..895dac4 100644
--- a/docs/project_context.md
+++ b/docs/project_context.md
@@ -393,3 +393,10 @@
 - Cleanup verification completed: `.venv\Scripts\python.exe -m compileall app`, `npm run build`, PowerShell AST parse for `scripts/build.ps1`, Docker-hosted `sh -n scripts/build.sh`, and `cargo check --manifest-path src-tauri\Cargo.toml` with a temporary sidecar placeholder all passed. Linux/macOS native server and desktop packages still need native OS verification.
 - `src-tauri/gen/schemas/` is intentionally tracked because `src-tauri/capabilities/default.json` references `../gen/schemas/desktop-schema.json`; do not ignore or delete these schema files during cleanup, otherwise VS Code JSON validation reports a missing schema.
 - `README.md` has been rewritten to document local startup, Server Portable, Tauri desktop, Docker, Linux/macOS build commands, configuration blocks, common APIs, and cleanup rules. Keep future build instructions in sync with `scripts/build.*`.
+
+## 2026-05-20: Tauri desktop console and installer language
+
+- `src-tauri/src/main.rs` uses `#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]` so Windows release builds use the GUI subsystem and do not open an extra console window when launched from Explorer or the installer shortcut.
+- `build/capareport-server.spec` keeps Server Portable in console mode, but desktop one-file sidecar builds (`CAPAREPORT_ONEFILE=1`) use PyInstaller `console=False`; PyInstaller should select `runw.exe` for the sidecar so it also stays hidden behind the Tauri window.
+- `src-tauri/tauri.conf.json` sets Windows installer localization through `bundle.windows.wix.language = "zh-CN"` and `bundle.windows.nsis.languages = ["SimpChinese"]`. NSIS language keys must use NSIS names such as `SimpChinese`, while WiX/MSI uses locale names such as `zh-CN`.
+- Verification on Windows: `cargo check --manifest-path src-tauri\Cargo.toml` passed, `scripts\build.bat desktop` generated the MSI and NSIS bundles, PE subsystem checks reported `Windows GUI` for both `capacity-report-desktop.exe` and `capareport-server.exe`, and the generated NSIS script included `MUI_LANGUAGE "SimpChinese"`.
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index c9c9884..db42283 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -1,7 +1,9 @@
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+use std::error::Error;
 use std::fs;
 use std::path::{Path, PathBuf};
 use std::sync::Mutex;
-use std::error::Error;
 
 use tauri::{Manager, Runtime};
 use tauri_plugin_shell::process::CommandChild;
@@ -38,7 +40,9 @@ fn resource_candidates<R: Runtime>(
     app: &tauri::App<R>,
     name: &str,
 ) -> Result<Vec<PathBuf>, Box<dyn Error>> {
-    let resource_path = app.path().resolve(name, tauri::path::BaseDirectory::Resource)?;
+    let resource_path = app
+        .path()
+        .resolve(name, tauri::path::BaseDirectory::Resource)?;
     let escaped_parent_path = app
         .path()
         .resolve(format!("_up_/{name}"), tauri::path::BaseDirectory::Resource)?;
@@ -66,13 +70,14 @@ fn start_server<R: Runtime>(app: &tauri::App<R>) -> Result<(), Box<dyn Error>> {
     let (mut rx, child) = app
         .shell()
         .sidecar("capareport-server")?
-        .env("CAPAREPORT_BASE_DIR", data_dir.to_string_lossy().to_string())
+        .env(
+            "CAPAREPORT_BASE_DIR",
+            data_dir.to_string_lossy().to_string(),
+        )
         .args(["--host", "127.0.0.1", "--port", "19082"])
         .spawn()?;
 
-    tauri::async_runtime::spawn(async move {
-        while rx.recv().await.is_some() {}
-    });
+    tauri::async_runtime::spawn(async move { while rx.recv().await.is_some() {} });
 
     let pid = child.pid();
     let state = app.state::<ServerState>();
@@ -82,11 +87,7 @@ fn start_server<R: Runtime>(app: &tauri::App<R>) -> Result<(), Box<dyn Error>> {
 
 fn stop_server<R: Runtime>(app: &tauri::AppHandle<R>) {
     let state = app.state::<ServerState>();
-    let child = state
-        .0
-        .lock()
-        .expect("server state lock poisoned")
-        .take();
+    let child = state.0.lock().expect("server state lock poisoned").take();
     if let Some(process) = child {
         #[cfg(target_os = "windows")]
         {
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index 529918c..8c4cc28 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -37,6 +37,16 @@
     "resources": [
       "../Configure.json",
       "../ReportScript.sql"
-    ]
+    ],
+    "windows": {
+      "wix": {
+        "language": "zh-CN"
+      },
+      "nsis": {
+        "languages": [
+          "SimpChinese"
+        ]
+      }
+    }
   }
 }