feat(软件信息): 弹窗标题统一为“软件信息”

assets/webui/index.html

@@ -196,7 +196,7 @@
 		</div>
 <dialog id="aboutPanel" class="form-dialog about-dialog">
 			<form method="dialog">
-				<h2 id="aboutTitle" class="form-title">OFDGo</h2>
+				<h2 id="aboutTitle" class="form-title">软件信息</h2>
 				<div class="about-row"><span>构建版本</span><span id="aboutVersion">develop</span></div>
 				<div class="about-row"><span>项目官网</span><a href="https://ofdgo.aite.me/" target="_blank" rel="noreferrer">https://ofdgo.aite.me/</a></div>
 				<div class="about-row"><span>桌面软件</span><a href="https://ofdgo.aite.me/releases/" target="_blank" rel="noreferrer">https://ofdgo.aite.me/releases/</a></div>

ofdgo_pdf_structure.go

@@ -1155,12 +1155,12 @@ func (p *pdfImporter) documentMetadata(ctx context.Context, strict bool) error {
 		name string
 		text *string
 	}{{"CreationDate", &projected.CreationDate}, {"ModDate", &projected.ModDate}} {
+		*field.text = ""
 		if value, ok := values[field.name]; ok {
 			date, day, _, err := codecpdf.MetadataDate(value.text, value.xmp)
 			if err != nil {
 				return fmt.Errorf("PDF metadata %s: %w", field.name, err)
 			}
-			*field.text = ""
 			if day {
 				*field.text = date.Format("2006-01-02")
 			}