add: show metadata, streams, and clock-time ETA in status UI

Surface the fetched job metadata (show/episode or movie title, season,
episode, release/airdate, media type) and the source audio/subtitle streams
through the tracker and /status, and render them in the dashboard's current-job
card. Audio channel counts are now probed and shown as 5.1/2.0/etc.

ETA now reads as a wall-clock finish time plus remaining duration, e.g.
"17:49 (3h52m)". Recent events drop the per-row date for a WhatsApp-style
Today/Yesterday/date divider with time-only rows. All dynamic strings are
HTML-escaped, since metadata and filenames are user-controlled.

cmd/videnc/main.go

@@ -129,6 +129,7 @@ func processFile(ctx context.Context, inputPath string, cfg *types.Config, enc *
 	if err != nil {
 		log.ErrorFile(inputPath, "Getting stream languages", err.Error())
 	}
+	tracker.SetStreams(toStatusStreams(streamLangs))
 
 	mediaType := metadata.ParseMediaType(filename)
 	if mediaType == "" {
@@ -176,6 +177,16 @@ func processFile(ctx context.Context, inputPath string, cfg *types.Config, enc *
 	}
 	meta.OriginalMedia = mediaType
 
+	tracker.SetMeta(status.JobMeta{
+		IsSeries:     meta.IsSeries,
+		Title:        meta.Title,
+		Collection:   meta.Collection,
+		Season:       meta.Season,
+		Episode:      meta.Episode,
+		DateReleased: meta.DateReleased,
+		MediaType:    string(mediaType),
+	})
+
 	job := &types.Job{
 		InputPath:    inputPath,
 		MediaType:    mediaType,
@@ -241,6 +252,21 @@ func failToFailed(path, failedDir string, log *logger.Logger) {
 	}
 }
 
+// toStatusStreams maps probed source streams to the display shape, keeping only
+// audio and subtitle streams (the video stream isn't shown).
+func toStatusStreams(streams []encoder.StreamMetadata) []status.Stream {
+	var out []status.Stream
+	for _, s := range streams {
+		switch s.CodecType {
+		case "audio":
+			out = append(out, status.Stream{Kind: "audio", Language: s.Language, Codec: s.CodecName, Channels: s.Channels, Title: s.Title})
+		case "subtitle":
+			out = append(out, status.Stream{Kind: "subtitle", Language: s.Language, Codec: s.CodecName, Title: s.Title})
+		}
+	}
+	return out
+}
+
 func generateRandomString(length int) string {
 	bytes := make([]byte, length/2+1)
 	rand.Read(bytes)