Fix filename rendering: split drawText into layout + drawLineText to avoid triple LayoutString calls

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

internal/ui/render.go

@@ -230,9 +230,9 @@ func (r *Renderer) drawTruncatedText(gtx layout.Context, shp *text.Shaper, str s
 		}
 	}
 
-	// Re-layout truncated text and draw
+	// Re-layout truncated text and draw glyphs directly
 	shp.LayoutString(text.Parameters{PxPerEm: fixed.I(gtx.Sp(size))}, fullStr)
-	r.drawText(gtx, shp, fullStr, size, x, y, col)
+	r.drawLineText(gtx, shp, x, y, col)
 }
 
 // drawText draws text using the same approach as Gio's textView:
@@ -240,8 +240,11 @@ func (r *Renderer) drawTruncatedText(gtx layout.Context, shp *text.Shaper, str s
 func (r *Renderer) drawText(gtx layout.Context, shp *text.Shaper, str string, size unit.Sp, x, y unit.Dp, col color.NRGBA) {
 	// Layout text
 	shp.LayoutString(text.Parameters{PxPerEm: fixed.I(gtx.Sp(size))}, str)
+	r.drawLineText(gtx, shp, x, y, col)
+}
 
-	// Draw glyphs using the same approach as Gio's textView
+// drawLineText draws already-laid-out glyphs using shaper.Shape() and shaper.Bitmaps().
+func (r *Renderer) drawLineText(gtx layout.Context, shp *text.Shaper, x, y unit.Dp, col color.NRGBA) {
 	var glyphs [32]text.Glyph
 	line := glyphs[:0]
 	for g, ok := shp.NextGlyph(); ok; g, ok = shp.NextGlyph() {