fix(windows): unify config/data dir and add service log file

config_dir() on Windows now returns data_dir() (ProgramData) so config,
services.json, and log file are in the same place for both interactive
and service contexts. Service mode writes logs to numa.log via
env_logger pipe. Dashboard shows correct log path per OS.

site/dashboard.html

@@ -1153,13 +1153,10 @@ async function refresh() {
       const isWin = stats.data_dir && stats.data_dir.includes(':\\');
       const isMac = stats.data_dir && stats.data_dir.includes('/usr/local/');
       const logsEl = document.getElementById('footerLogs');
-      if (isWin) {
+      logsEl.textContent = isWin
-        document.getElementById('footerLogsWrap').style.display = 'none';
+        ? stats.data_dir + '\\numa.log'
-      } else {
+        : isMac ? '/usr/local/var/log/numa.log'
-        logsEl.textContent = isMac
+        : 'journalctl -u numa -f';
-          ? '/usr/local/var/log/numa.log'
-          : 'journalctl -u numa -f';
-      }
     }
 
     // LAN status indicator
@@ -1523,7 +1520,7 @@ setInterval(refresh, 2000);
 <div style="text-align:center;padding:0.8rem 0.8rem 0.4rem;font-family:var(--font-mono);font-size:0.68rem;color:var(--text-dim);line-height:1.8;">
   Config: <span id="footerConfig" style="user-select:all;color:var(--emerald);"></span>
   · Data: <span id="footerData" style="user-select:all;color:var(--emerald);"></span>
-  <span id="footerLogsWrap">· Logs: <span id="footerLogs" style="user-select:all;color:var(--emerald);"></span></span>
+  · Logs: <span id="footerLogs" style="user-select:all;color:var(--emerald);"></span>
   <br>
   Upstream: <span id="footerUpstream" style="user-select:all;color:var(--emerald);"></span>
   · DNSSEC: <span id="footerDnssec" style="color:var(--text-dim);">—</span>

src/lib.rs

@@ -101,14 +101,11 @@ where
 /// Linux root daemon: /var/lib/numa (FHS) — falls back to /usr/local/var/numa
 ///                    if a pre-v0.10.1 install already lives there.
 /// macOS root daemon: /usr/local/var/numa (Homebrew prefix)
-/// Windows: %APPDATA%\numa
+/// Windows: %PROGRAMDATA%\numa (same as data_dir — no per-user config on Windows)
 pub fn config_dir() -> std::path::PathBuf {
     #[cfg(windows)]
     {
-        std::path::PathBuf::from(
+        data_dir()
-            std::env::var("APPDATA").unwrap_or_else(|_| "C:\\ProgramData".into()),
-        )
-        .join("numa")
     }
     #[cfg(not(windows))]
     {

src/main.rs

@@ -4,21 +4,32 @@ use numa::system_dns::{
 };
 
 fn main() -> numa::Result<()> {
+    // Handle CLI subcommands
+    let arg1 = std::env::args().nth(1).unwrap_or_default();
+
+    #[cfg(windows)]
+    if arg1 == "--service" {
+        // Running under SCM — stderr goes nowhere. Redirect logs to a file.
+        let log_path = numa::data_dir().join("numa.log");
+        let log_file = std::fs::OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&log_path)
+            .expect("failed to open log file");
+        env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"))
+            .format_timestamp_millis()
+            .target(env_logger::Target::Pipe(Box::new(log_file)))
+            .init();
+        numa::windows_service::run_as_service()
+            .map_err(|e| format!("windows service dispatcher failed: {}", e))?;
+        return Ok(());
+    }
+
     env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"))
         .format_timestamp_millis()
         .init();
 
-    // Handle CLI subcommands
-    let arg1 = std::env::args().nth(1).unwrap_or_default();
     match arg1.as_str() {
-        #[cfg(windows)]
-        "--service" => {
-            // Entry point used by Windows SCM (`sc create … binPath="numa.exe --service"`).
-            // Blocks until SCM sends Stop; never returns normally.
-            numa::windows_service::run_as_service()
-                .map_err(|e| format!("windows service dispatcher failed: {}", e))?;
-            return Ok(());
-        }
         "install" => {
             eprintln!("\x1b[1;38;2;192;98;58mNuma\x1b[0m — installing\n");
             return install_service().map_err(|e| e.into());