feat(depot): wire depot into dispatch registry and menu

Flip the depot Registry entry to Wired: true with its command list
(status/push/verify/get/pull), so crucible depot/depot status/etc.
route to depot.Run instead of the fail-closed unwired path. Update
dispatch_test.go: the canonical command surface, command-metadata
completeness (depot has no AppCommand since it parses its own
subcommands), the menu-items test (depot now expected in the menu),
and a new test asserting depot's stderr never reaches the dispatcher's
"not wired yet" message. Drop the stale "(SeaweedFS)" summary wording.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

internal/dispatch/dispatch_test.go

@@ -150,7 +150,7 @@ func TestBuilderHelpIsOK(t *testing.T) {
 
 func TestCanonicalCommandSurface(t *testing.T) {
 	want := map[string][]string{
-		"depot":   nil,
+		"depot":   {"status", "push", "verify", "get", "pull"},
 		"hak":     {"build", "manifest"},
 		"module":  {"build", "extract", "validate", "compare", "manifest"},
 		"topdata": {"validate", "build", "package", "compare", "convert"},
@@ -172,7 +172,11 @@ func TestRegistryCommandNamesAndAliasesAreUnambiguous(t *testing.T) {
 	for _, builder := range Registry {
 		seen := map[string]bool{}
 		for _, command := range builder.Commands {
-			if command.Name == "" || command.Summary == "" || command.AppCommand == "" || command.Usage == "" {
+			// depot parses its own subcommands and bypasses AppCommand routing
+			// entirely (see the depot special-case in runBuilder), so its
+			// Commands carry no AppCommand.
+			requireAppCommand := builder.Name != "depot"
+			if command.Name == "" || command.Summary == "" || command.Usage == "" || (requireAppCommand && command.AppCommand == "") {
 				t.Errorf("%s has incomplete command metadata: %#v", builder.Name, command)
 			}
 			if seen[command.Name] {
@@ -289,15 +293,35 @@ func TestMenuItemsSkipsUnwiredIncludesWired(t *testing.T) {
 		t.Fatal("expected menu items")
 	}
 	sawModuleBuild := false
+	sawDepotStatus := false
 	for _, it := range items {
-		if it.Args[0] == "depot" {
-			t.Errorf("unwired builder %q must not appear in the menu", it.Args[0])
-		}
 		if len(it.Args) == 2 && it.Args[0] == "module" && it.Args[1] == "build" {
 			sawModuleBuild = true
 		}
+		if len(it.Args) == 2 && it.Args[0] == "depot" && it.Args[1] == "status" {
+			sawDepotStatus = true
+		}
 	}
 	if !sawModuleBuild {
 		t.Error("expected 'module build' in the menu")
 	}
+	if !sawDepotStatus {
+		t.Error("expected wired builder 'depot status' in the menu")
+	}
+}
+
+// TestDepotRoutesToDepotRun asserts the depot special-case in runBuilder
+// reaches depot.Run rather than the generic Commands/delegateLegacy path or
+// the unwired fail-closed path. With no manifests dir present, depot.Run's
+// status command fails resolving the backend/manifest (exit 70), but the
+// stderr text must come from depot, never the dispatcher's unwiredMsg.
+func TestDepotRoutesToDepotRun(t *testing.T) {
+	var out, errw bytes.Buffer
+	code := runBuilder("depot", []string{"status", "--target", "local"}, &out, &errw)
+	if errw.Len() == 0 {
+		t.Fatalf("depot status with no manifests dir: expected an error from depot.Run, got no stderr (exit=%d)", code)
+	}
+	if strings.Contains(errw.String(), "not wired yet") {
+		t.Fatalf("depot status: stderr shows the dispatcher's unwired message, want depot.Run's own error:\n%s", errw.String())
+	}
 }