feat: 新增 svc.list/log.list 命令

svc.list 列出所有服务（systemctl/launchctl/sc）
log.list 列出可用日志来源（journalctl/日志目录/wevtutil）

internal/registry/builtin.go

@@ -641,6 +641,15 @@ func Builtin() *Registry {
 		},
 
 		// ----- svc -----
+		{
+			ID:      "svc.list",
+			Group:   "svc",
+			Summary: "列出所有服务",
+			Action: "列出系统中所有服务。" +
+				"Linux: systemctl list-unit-files；macOS: launchctl list；" +
+				"Windows: sc query state= all",
+			Variants: threePlatformBuiltins("svc.list"),
+		},
 		{
 			ID:      "svc.status",
 			Group:   "svc",
@@ -783,6 +792,14 @@ func Builtin() *Registry {
 		},
 
 		// ----- log -----
+		{
+			ID:      "log.list",
+			Group:   "log",
+			Summary: "列出可用的日志来源",
+			Action: "列出系统中可用的日志来源。" +
+				"Linux: journalctl --list-boots；macOS: 列出日志目录；Windows: wevtutil el",
+			Variants: threePlatformBuiltins("log.list"),
+		},
 		{
 			ID:      "log.search",
 			Group:   "log",

internal/registry/registry_test.go

@@ -28,12 +28,12 @@ func TestBuiltinIDsStable(t *testing.T) {
 		"disk.usage", "net.pids", "net.ports", "proc.nohup", "proc.wait", "java.run", "git.retime", "pkg.refreshindex",
 		"user.grant", "user.revoke",
 		"file.findbig", "file.findrecent", "file.findname",
-		"svc.status", "svc.enable", "svc.disable", "svc.logs",
+		"svc.list", "svc.status", "svc.enable", "svc.disable", "svc.logs",
 		"archive.extract",
 		"sysinfo",
 		"proc.topmem", "proc.topcpu", "proc.killname",
 		"net.ping", "net.trace", "net.dns", "net.curl",
-		"log.search", "log.last",
+		"log.list", "log.search", "log.last",
 		"fw.status", "fw.allow", "fw.deny",
 		"net.iface", "net.conn", "net.speed",
 		"proc.tree",