style: remove firehose opaque row backdrop and background color

engine/scroll.py

@@ -15,7 +15,7 @@ from engine.render import big_wrap, lr_gradient, make_block
 from engine.effects import noise, glitch_bar, fade_line, vis_trunc, next_headline, firehose_line
 
 _ANSI_LINE_RE = re.compile(r"^(\033\[[0-9;]*m)(.*)(\033\[0m)$")
-FIREHOSE_BG = "\033[48;5;233m"
+FIREHOSE_BG = ""
 
 
 def _overlay_segments(ansi_line, bg=""):
@@ -227,8 +227,6 @@ def stream(items, ntfy_poller, mic_monitor):
                 scr_row = firehose_top + fr + 1
                 if scr_row <= msg_h or scr_row > h:
                     continue
-                # Opaque row backdrop to distinguish firehose from ticker beneath it.
-                buf.append(f"\033[{scr_row};1H{FIREHOSE_BG}{' ' * w}{RST}")
                 for col, chunk in _overlay_segments(fline, FIREHOSE_BG):
                     buf.append(f"\033[{scr_row};{col}H{chunk}")