fix: Windows daemon survives session jobs; quieter wrap note; correct mute error

Verified on a Windows 11 VM over WinRM: doctor, SAPI synthesis, Edge,
oto/WASAPI playback, autostart, mute file, wrap exit codes, doctor --probe
and toast mode all work. Three findings fixed:

- The autostarted daemon died with the WinRM shell: Windows session hosts
  (WinRM, SSH, CI runners) put children into a job object that is
  terminated with the session. Spawn now starts the daemon with
  CREATE_BREAKAWAY_FROM_JOB first and falls back to a start without it when
  the job forbids breakaway. Confirmed: the daemon now outlives the WinRM
  shell and `talk daemon stop` still ends it.
- `talk mute` without a daemon printed "daemon call failed (<nil>)": the
  outer err was reported instead of the call's. Now "no daemon (<reason>);
  writing the mute file directly".
- `talk wrap` printed "command did not exit cleanly" for every non-zero
  exit code. The note is now reserved for commands that produced no exit
  code of their own (not found, signal); a plain failure is carried by the
  announcement and the exit code alone.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

internal/daemon/spawn.go

@@ -17,7 +17,6 @@ import (
 // port in use) without waiting for a timeout. If the caller exits first,
 // the daemon keeps running (that is the point).
 func Spawn(exe, logPath string, env []string) (<-chan error, error) {
-	var logFile *os.File
 	if logPath == "" {
 		logPath = os.DevNull
 	}
@@ -27,13 +26,24 @@ func Spawn(exe, logPath string, env []string) (<-chan error, error) {
 	}
 	defer logFile.Close() // the child holds its own handle
 
-	cmd := exec.Command(exe, "daemon", "run")
-	cmd.Env = env
-	cmd.Stdin = nil
-	cmd.Stdout = logFile
-	cmd.Stderr = logFile
-	detach(cmd)
-	if err := cmd.Start(); err != nil {
+	// First attempt: fully detached, including a breakaway from the parent's
+	// job object (Windows). Shells such as WinRM, SSH servers or CI runners
+	// put children into a job that is terminated with the session; the
+	// breakaway lets the daemon outlive it. If the job forbids breakaway,
+	// CreateProcess fails, and the second attempt starts without it.
+	var cmd *exec.Cmd
+	for _, breakaway := range []bool{true, false} {
+		cmd = exec.Command(exe, "daemon", "run")
+		cmd.Env = env
+		cmd.Stdin = nil
+		cmd.Stdout = logFile
+		cmd.Stderr = logFile
+		detach(cmd, breakaway)
+		if err = cmd.Start(); err == nil {
+			break
+		}
+	}
+	if err != nil {
 		return nil, fmt.Errorf("starting daemon (%s daemon run): %w", exe, err)
 	}
 	exited := make(chan error, 1)

internal/daemon/spawn_other.go

@@ -5,4 +5,4 @@ package daemon
 import "os/exec"
 
 // detach is a no-op on this platform (no Setsid, no console).
-func detach(*exec.Cmd) {}
+func detach(*exec.Cmd, bool) {}

internal/daemon/spawn_unix.go

@@ -7,8 +7,9 @@ import (
 	"syscall"
 )
 
-// detach detaches the child from the terminal: own session (no SIGHUP when
+// detach detaches the child from the terminal (the breakaway flag is a
+// Windows concept and ignored here): own session (no SIGHUP when
 // the terminal closes, no Ctrl-C from the shell).
-func detach(cmd *exec.Cmd) {
+func detach(cmd *exec.Cmd, _ bool) {
 	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
 }

internal/daemon/spawn_windows.go

@@ -11,10 +11,18 @@ import (
 // binding to the caller's console.
 const detachedProcess = 0x00000008
 
+// createBreakawayFromJob is the Win32 flag CREATE_BREAKAWAY_FROM_JOB: the
+// child leaves the parent's job object, so a session-bound job (WinRM, SSH,
+// CI) does not take the daemon down with it. Only works when the job allows
+// it; Spawn falls back to a start without the flag otherwise.
+const createBreakawayFromJob = 0x01000000
+
 // detach detaches the child from the console: own process group (no Ctrl-C
 // from the shell) and no console (no flashing window).
-func detach(cmd *exec.Cmd) {
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP | detachedProcess,
+func detach(cmd *exec.Cmd, breakaway bool) {
+	flags := uint32(syscall.CREATE_NEW_PROCESS_GROUP | detachedProcess)
+	if breakaway {
+		flags |= createBreakawayFromJob
 	}
+	cmd.SysProcAttr = &syscall.SysProcAttr{CreationFlags: flags}
 }