feat: field-sync-gui MVP — Wails GUI ingest SD→local+S3 (4 slots //)

internal/detect/detect_test.go

@@ -0,0 +1,25 @@
+package detect
+
+import "testing"
+
+func TestDetectNoPanic(t *testing.T) {
+	cards := Detect()
+	// May be empty in CI — just verify no panic
+	_ = cards
+}
+
+func TestHasMediaExtension(t *testing.T) {
+	cases := map[string]bool{
+		"clip.mp4":  true,
+		"photo.JPG": true,
+		"photo.raw": true,
+		"file.txt":  false,
+		"archive.zip": false,
+	}
+	for path, want := range cases {
+		got := HasMediaExtension(path)
+		if got != want {
+			t.Errorf("HasMediaExtension(%q) = %v, want %v", path, got, want)
+		}
+	}
+}