Increase firehose zone height and adjust scroll duration multiplier for firehose mode.

mainline.py

@@ -462,7 +462,7 @@ def fetch_poetry():
 
 # ─── STREAM ───────────────────────────────────────────────
 _SCROLL_DUR = 3.75  # seconds per headline
-FIREHOSE_H = 6      # firehose zone height (terminal rows)
+FIREHOSE_H = 12     # firehose zone height (terminal rows)
 _mic_db = -99.0     # current mic level, written by background thread
 _mic_stream = None
 
@@ -737,7 +737,7 @@ def stream(items):
     fh = FIREHOSE_H if FIREHOSE else 0
     sh = h - fh                    # scroll zone height
     GAP = 3            # blank rows between headlines
-    dt = _SCROLL_DUR / (sh + 15) * 2
+    dt = _SCROLL_DUR / (sh + 15) * (4 if FIREHOSE else 2)
 
     # active blocks: (content_rows, color, canvas_y, meta_idx)
     active = []