Record a removal's outcome, publish it, and read one directory once

The record kept only the intent, so a failed unlink read as removed; each
link now gets a synced intent and outcome line, and the outcome is the
module's link.removal event so it is not only a file on one machine.
The put-back hint no longer advises a symlink, an aliased directory is
read once, a machine-wide removal from user scope is said, and the state
directory names no owner a machine without an account cannot resolve.

modules/systemd/cmd/systemd-tools/main.go

@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"os"
 	"os/user"
+	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -153,7 +154,8 @@ func tools(m *Manager) []stdio.Tool {
 				"`disable` leaves once the unit's file is gone — on the person's word: `why` is required. Each link is " +
 				"recorded first (its path, its target, the person's reason) in the module's state, then removed, and " +
 				"the manager reloaded. A link whose target exists, a package's, a generator's or the runtime's is left, " +
-				"and said. `wanted-by` shows what it would remove.",
+				"and said; a user-scope call that removes a machine-wide link says so. Each outcome is also published " +
+				"as the module's link.removal event. `wanted-by` shows what it would remove.",
 			Input: map[string]any{"scope": scopeArg, "unit": unitArgS,
 				"why": str("the person's reason for removing the links, kept in the record")},
 			Run: func(a map[string]any) (any, error) {
@@ -208,7 +210,8 @@ func fromEnv() *Manager {
 	}
 	return &Manager{Account: account, UID: uid, User: name, Run: execRunner, Read: readFile, Env: os.Environ(),
 		Home: home, ReadDir: readDir, Lstat: lstatEntry, Remove: os.Remove,
-		State: strings.TrimSpace(os.Getenv("MESH_SYSTEMD_STATE"))}
+		State: strings.TrimSpace(os.Getenv("MESH_SYSTEMD_STATE")), Resolve: filepath.EvalSymlinks,
+		Emit: func(eventType string, body any) error { return stdio.Emit(eventType, body) }}
 }
 
 func main() {