fix: Windows init and daemon startup (issue #5)

Three related bugs caused "wx init" and daemon startup to fail on Windows:

1. init.rs: create ~/.wx-cli/ before writing all_keys.json (was created
   only before config.json, so first write failed with ENOENT)

2. transport.rs (Windows): daemon.log was always empty because stderr
   was never redirected, and log file open silently fell back to null
   when parent dir didn't exist. Now mirror the Unix version: create
   parent dir, try_clone to redirect both stdout and stderr.

3. server.rs (Windows): interprocess GenericNamespaced auto-prepends
   \\.\pipe\ on Windows. Passing the full path caused a double-prefixed
   pipe name that clients (using raw \\.\pipe\wx-cli-daemon) could
   never connect to, leading to the 15s startup timeout.

src/cli/init.rs

@@ -43,6 +43,12 @@ pub fn cmd_init(force: bool) -> Result<()> {
     println!("扫描加密密钥（需要 root 权限）...");
     let entries = scanner::scan_keys(&db_dir)?;
 
+    // 确保父目录存在（如 ~/.wx-cli/），必须在任何写入之前
+    if let Some(parent) = config_path.parent() {
+        std::fs::create_dir_all(parent)
+            .with_context(|| format!("创建目录失败: {}", parent.display()))?;
+    }
+
     // Step 3: 保存 all_keys.json
     let keys_file_path = config_path.parent()
         .unwrap_or(std::path::Path::new("."))
@@ -75,11 +81,6 @@ pub fn cmd_init(force: bool) -> Result<()> {
     cfg.entry("keys_file".into()).or_insert_with(|| json!("all_keys.json"));
     cfg.entry("decrypted_dir".into()).or_insert_with(|| json!("decrypted"));
 
-    // 确保父目录存在（如 ~/.wx-cli/）
-    if let Some(parent) = config_path.parent() {
-        std::fs::create_dir_all(parent)
-            .with_context(|| format!("创建目录失败: {}", parent.display()))?;
-    }
     std::fs::write(&config_path, serde_json::to_string_pretty(&cfg)?)
         .context("写入 config.json 失败")?;
     println!("配置已保存: {}", config_path.display());

src/cli/transport.rs

@@ -92,15 +92,21 @@ fn start_daemon() -> Result<()> {
     #[cfg(windows)]
     {
         use std::os::windows::process::CommandExt;
-        let log_file = std::fs::OpenOptions::new()
+        let log_path = config::log_path();
+        if let Some(parent) = log_path.parent() {
+            let _ = std::fs::create_dir_all(parent);
+        }
+        let (stdout_stdio, stderr_stdio) = std::fs::OpenOptions::new()
             .create(true).append(true)
-            .open(config::log_path())
-            .ok()
-            .map(std::process::Stdio::from)
-            .unwrap_or_else(std::process::Stdio::null);
+            .open(&log_path)
+            .and_then(|f| f.try_clone().map(|g| (f, g)))
+            .map(|(f, g)| (std::process::Stdio::from(f), std::process::Stdio::from(g)))
+            .unwrap_or_else(|_| (std::process::Stdio::null(), std::process::Stdio::null()));
         let _ = std::process::Command::new(&exe)
             .env("WX_DAEMON_MODE", "1")
-            .stdout(log_file)
+            .stdin(std::process::Stdio::null())
+            .stdout(stdout_stdio)
+            .stderr(stderr_stdio)
             .creation_flags(0x00000008) // DETACHED_PROCESS
             .spawn()
             .context("无法启动 daemon 进程")?;

src/daemon/server.rs

@@ -92,12 +92,13 @@ async fn serve_windows(
         tokio::prelude::*, GenericNamespaced, ListenerOptions,
     };
 
-    let pipe_name = r"\\.\pipe\wx-cli-daemon";
-    let name = pipe_name.to_ns_name::<GenericNamespaced>()?;
+    // interprocess 的 GenericNamespaced 在 Windows 上会自动拼接 `\\.\pipe\` 前缀，
+    // 这里必须传相对名；client 端用 `\\.\pipe\wx-cli-daemon` 直接打开可以对上
+    let name = "wx-cli-daemon".to_ns_name::<GenericNamespaced>()?;
     let opts = ListenerOptions::new().name(name);
     let listener = opts.create_tokio()?;
 
-    eprintln!("[server] 监听 {}", pipe_name);
+    eprintln!("[server] 监听 \\\\.\\pipe\\wx-cli-daemon");
 
     loop {
         let conn = listener.accept().await?;