Enable plain TTY logging mode + loose-data processing

internal/app/app_test.go

@@ -35,8 +35,7 @@ topdata:
 
 	sourceTime := time.Now().Add(-2 * time.Hour)
 	outputTime := time.Now().Add(-1 * time.Hour)
-	setFileTime(t, filepath.Join(root, "topdata", "assets", "gui", "testicon.png"), sourceTime)
-	setFileTime(t, filepath.Join(root, "topdata", "data", "repadjust", "base.json"), sourceTime)
+	setTreeTime(t, filepath.Join(root, "topdata"), sourceTime)
 	setFileTime(t, filepath.Join(root, ".cache", "2da", "repadjust.2da"), outputTime)
 	setFileTime(t, filepath.Join(root, "build", "sow_tlk.tlk"), outputTime)
 
@@ -130,6 +129,19 @@ haks:
 	}
 }
 
+func setTreeTime(t *testing.T, root string, modTime time.Time) {
+	t.Helper()
+	err := filepath.WalkDir(root, func(path string, d os.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			return walkErr
+		}
+		return os.Chtimes(path, modTime, modTime)
+	})
+	if err != nil {
+		t.Fatalf("set tree time under %s: %v", root, err)
+	}
+}
+
 func TestRunBuildHAKsVerboseListsMappings(t *testing.T) {
 	root := t.TempDir()
 	mkdirAll(t, filepath.Join(root, "assets", "envi", "music", "westgate"))
@@ -212,6 +224,13 @@ func TestTopdataConsoleSuppressesProgressInNormalMode(t *testing.T) {
 	}
 }
 
+func TestSpinnerEnabledForHonorsPlainTTYMode(t *testing.T) {
+	t.Setenv("SOW_TOOLS_TTY_MODE", "plain")
+	if spinnerEnabledFor(&bytes.Buffer{}, logLevelNormal) {
+		t.Fatal("expected plain tty mode to disable spinner output")
+	}
+}
+
 func TestTopdataConsoleDebugProgressAndRelativePaths(t *testing.T) {
 	var stdout bytes.Buffer
 	console := &topdataConsole{