test(mineru): dump parsed markdown for live content proof

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/mineru/live_test.go

@@ -53,6 +53,12 @@ func TestLive_ParseTinyPDF(t *testing.T) {
 	if pdfPath != "" && res.EngineMode == "" {
 		t.Fatal("missing engine mode")
 	}
+	// Dump a content sample so the report can prove real text was extracted.
+	if os.Getenv("MINERU_LIVE_DUMP") != "" {
+		_ = os.WriteFile(os.Getenv("MINERU_LIVE_DUMP"), []byte(res.Markdown), 0o644)
+		t.Logf("wrote %d bytes to %s; contains 冲击波=%v",
+			len(res.Markdown), os.Getenv("MINERU_LIVE_DUMP"), strings.Contains(res.Markdown, "冲击波"))
+	}
 }
 
 func getenv(k, def string) string {