fix: remove --progress-template, parse default [download] output instead

--progress-template output is suppressed in non-TTY subprocesses
(yt-dlp issue #13649). The default [download] progress format
works reliably in pipes. Changes:

- Remove --progress-template from yt-dlp args entirely
- Keep --newline for newline-delimited output in pipe
- Fix progressRE regex to handle HLS format: ~ with leading
  spaces before size (e.g. '~   1.00KiB')
- Fix speed parsing in [download] fallback to handle multiple
  leading spaces (e.g. 'at    976.20B/s')
- Fix ETA parsing to strip (frag n/m) suffix
- Filter Unknown/N/A speed/eta in [download] fallback
- Add test cases for real HLS fragment output format

internal/dl/progress.go

@@ -11,7 +11,7 @@ import (
 	"uptodownBot/internal/domain"
 )
 
-var progressRE = regexp.MustCompile(`\[\w+\]\s+([\d.]+)%\s+of\s+~?([\d.]+)(\w+)`)
+var progressRE = regexp.MustCompile(`\[\w+\]\s+([\d.]+)%\s+of\s+~?\s*([\d.]+)(\w+)`)
 var progressTemplateRE = regexp.MustCompile(`^DLPROG\|\s*([\d.]+)%\|\s*(.*?)\s*\|(.*)$`)
 
 type progressUpdate struct {
@@ -71,15 +71,28 @@ func parseProgressLine(line string) *progressUpdate {
 		rest = rest[idx+1:]
 	}
 	if atIdx := strings.Index(rest, " at "); atIdx >= 0 {
-		afterAt := rest[atIdx+4:]
+		afterAt := strings.TrimSpace(rest[atIdx+4:])
 		if spaceIdx := strings.Index(afterAt, " "); spaceIdx >= 0 {
-			u.speed = strings.TrimSpace(afterAt[:spaceIdx])
+			speedVal := afterAt[:spaceIdx]
+			if !strings.EqualFold(speedVal, "unknown") && speedVal != "N/A" {
+				u.speed = speedVal
+			}
 			rest = afterAt[spaceIdx:]
+		} else {
+			if !strings.EqualFold(afterAt, "unknown") && afterAt != "N/A" {
+				u.speed = afterAt
+			}
+			rest = ""
 		}
 	}
 	if etaIdx := strings.Index(rest, "ETA "); etaIdx >= 0 {
 		etaStr := strings.TrimSpace(rest[etaIdx+4:])
-		u.eta = etaStr
+		if parenPos := strings.Index(etaStr, "("); parenPos > 0 {
+			etaStr = strings.TrimSpace(etaStr[:parenPos])
+		}
+		if !strings.EqualFold(etaStr, "unknown") && etaStr != "N/A" {
+			u.eta = etaStr
+		}
 	}
 
 	return u

internal/dl/progress_test.go

@@ -67,6 +67,27 @@ func TestParseProgressLine(t *testing.T) {
 			eta:    "00:02",
 			hasRes: true,
 		},
+		{
+			line:   "[download] 100.0% of ~   1.00KiB at    976.20B/s ETA Unknown (frag 0/18)",
+			pct:    100.0,
+			speed:  "976.20B/s",
+			eta:    "",
+			hasRes: true,
+		},
+		{
+			line:   "[download]  16.7% of ~  18.00KiB at    976.20B/s ETA Unknown (frag 0/18)",
+			pct:    16.7,
+			speed:  "976.20B/s",
+			eta:    "",
+			hasRes: true,
+		},
+		{
+			line:   "[download]  11.1% of ~   8.34MiB at  716.47KiB/s ETA 00:08 (frag 1/18)",
+			pct:    11.1,
+			speed:  "716.47KiB/s",
+			eta:    "00:08",
+			hasRes: true,
+		},
 		{
 			line:   "[download]  1.2% of unknown size at 0.00B/s ETA Unknown",
 			hasRes: false,
@@ -196,6 +217,9 @@ func TestParseProgressLineEdgeCases(t *testing.T) {
 		{"[download]   0.0% of 1.00GiB at    0.00B/s ETA 00:00", "multiple spaces", true},
 		{"[download] 100.0% of 1.00GiB at 999.99MiB/s ETA 00:00", "high speed", true},
 		{"[download] 100.0% of 999.99TiB at 1.00TiB/s ETA 00:00", "large numbers", true},
+		{"[download] 100.0% of ~   1.00KiB at    976.20B/s ETA Unknown (frag 0/18)", "hls frag first", true},
+		{"[download]  16.7% of ~  18.00KiB at    976.20B/s ETA Unknown (frag 0/18)", "hls frag", true},
+		{"[download]  11.1% of ~   8.34MiB at  716.47KiB/s ETA 00:08 (frag 1/18)", "hls frag with eta", true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

internal/dl/ytdlp.go

@@ -283,9 +283,8 @@ func (c *Client) StartDownload(job *domain.DownloadJob, downloadDir string) (<-c
 	outputPath := filepath.Join(downloadDir, job.ID+"_%(id)s.%(ext)s")
 	args = append(args, "--output", outputPath)
 
-	// Progress reporting using progress-template for machine-readable output
+	// Use --newline so each progress line is newline-delimited in pipe
 	args = append(args, "--newline")
-	args = append(args, "--progress-template", "DLPROG|%(progress._percent_str)s|%(progress._speed_str)s|%(progress._eta_str)s")
 
 	// Language selection if specified
 	if job.Language != "" {