feat: add thumbnail preview, audio-only detection, /download command, tests, and bugfixes

- Add thumbnail preview with metadata (title, uploader, duration) before download
- Auto-detect audio-only sites (Spotify, SoundCloud, etc.) and skip type selection
- Add /download command for feature parity with UI button
- Fix yt-dlp defer bug: StatusFailed was overwritten to StatusCompleted
- Fix handleURLInput using editText with msgID=0 (now uses sendWithKB)
- Fix filename detection: use job ID prefix for reliable file finding
- Fix double answerCb between handleBackStep and handleDownloadPrompt
- Fix runDownload unused msgID parameter
- Fix context for download goroutine (use context.Background)
- Remove unused startWebhook h parameter
- Remove dead buildToggleKeyboard function
- Add formatBytes, formatDuration, formatLabelForDisplay tests
- Add IsAudioOnlyContent, MediaType.String tests
- Add repo integration tests (users, preferences, quotas, history, delete)
- Add cmd/bot tests (parseAllowedUsers, env helpers)
- Add edge case tests for progress parser
- Add zero/negative safety guard in formatDuration
- Add .gitea, TODO.md, opencode.json to gitignore

internal/dl/progress_test.go

@@ -46,6 +46,35 @@ func TestParseProgressLine(t *testing.T) {
 			line:   "some random log line",
 			hasRes: false,
 		},
+		{
+			line:   "[download]   0.0% of 1.00GiB at 0.00B/s ETA 00:00",
+			pct:    0.0,
+			speed:  "0.00B/s",
+			eta:    "00:00",
+			hasRes: true,
+		},
+		{
+			line:   "[download]   0.0% of 1.00KiB at 100.00KiB/s ETA 00:01",
+			pct:    0.0,
+			speed:  "100.00KiB/s",
+			eta:    "00:01",
+			hasRes: true,
+		},
+		{
+			line:   "[download]  50.5% of 2.00MiB at 500.00KiB/s ETA 00:02",
+			pct:    50.5,
+			speed:  "500.00KiB/s",
+			eta:    "00:02",
+			hasRes: true,
+		},
+		{
+			line:   "[download]  1.2% of unknown size at 0.00B/s ETA Unknown",
+			hasRes: false,
+		},
+		{
+			line:   "[Merge] Merging video and audio...",
+			hasRes: false,
+		},
 	}
 	for _, tt := range tests {
 		got := parseProgressLine(tt.line)
@@ -70,3 +99,23 @@ func TestParseProgressLine(t *testing.T) {
 		}
 	}
 }
+
+func TestParseProgressLineEdgeCases(t *testing.T) {
+	tests := []struct {
+		line   string
+		name   string
+		hasRes bool
+	}{
+		{"[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},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := parseProgressLine(tt.line)
+			if tt.hasRes && got == nil {
+				t.Errorf("parseProgressLine(%q) = nil, want result", tt.line)
+			}
+		})
+	}
+}

internal/dl/ytdlp.go

@@ -49,6 +49,8 @@ type ytdlpFormat struct {
 
 type ytdlpInfo struct {
 	Title            string            `json:"title"`
+	Uploader         string            `json:"uploader"`
+	Thumbnail        string            `json:"thumbnail"`
 	Duration         float64           `json:"duration"`
 	IsLive           bool              `json:"is_live"`
 	Formats          []ytdlpFormat     `json:"formats"`
@@ -95,6 +97,8 @@ func (c *Client) GetMediaInfo(url string) (*domain.MediaInfo, error) {
 	mi := &domain.MediaInfo{
 		URL:        url,
 		Title:      info.Title,
+		Uploader:   info.Uploader,
+		Thumbnail:  info.Thumbnail,
 		Duration:   info.Duration,
 		IsPlaylist: info.Playlist != "",
 	}
@@ -146,6 +150,8 @@ func (c *Client) GetPlaylistInfo(url string) (*domain.MediaInfo, error) {
 	mi := &domain.MediaInfo{
 		URL:             url,
 		Title:           info.Title,
+		Uploader:        info.Uploader,
+		Thumbnail:       info.Thumbnail,
 		IsPlaylist:      true,
 		PlaylistCount:   info.PlaylistCount,
 		PlaylistEntries: c.parsePlaylistEntries(info.Entries),
@@ -226,8 +232,8 @@ func (c *Client) StartDownload(job *domain.DownloadJob, downloadDir string) (<-c
 		}
 	}
 
-	// Output template
-	outputPath := filepath.Join(downloadDir, "%(id)s.%(ext)s")
+	// Output template with job ID prefix for reliable file finding
+	outputPath := filepath.Join(downloadDir, job.ID+"_%(id)s.%(ext)s")
 	args = append(args, "--output", outputPath)
 
 	// Progress reporting
@@ -267,7 +273,6 @@ func (c *Client) StartDownload(job *domain.DownloadJob, downloadDir string) (<-c
 	go func() {
 		defer func() {
 			if job.Status != domain.StatusCancelled {
-				job.Status = domain.StatusCompleted
 				updates <- job
 			}
 			close(updates)