Fix empty bottom panel — panel_max_y was above panel_y

The bottom stat panel showed headers but no data rows because
panel_max_y (85% of height = 918px) was BELOW panel_y (bar_area_bottom
+ 6 = 934px), giving -16px of available space. Every row hit the
boundary check and was skipped.

Fix: panel_max_y now set to date_y - 10 (93% height - 10 = 994px),
giving 62px of usable space for 4 lines of data.

Also fix tenure unit: shows "yrs" only for age-based data (≤50
keyframes), omits unit for game-by-game data with many dates.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bar_race/animate.py

@@ -398,9 +398,12 @@ def populate_leader_overlays(
 
         # Build tenure leaderboard column (top 3 by tenure).
         if tenure_counts:
+            # Use "yrs" only if total keyframes is small (age-based data).
+            unit = "yrs" if n_steps <= 50 else ""
             top_tenure = sorted(tenure_counts.items(), key=lambda x: -x[1])[:3]
             f.tenure_leaders = [
-                f"{_abbrev(p)}: {t} yrs" for p, t in top_tenure
+                f"{_abbrev(p)}: {t}{' ' + unit if unit else ''}"
+                for p, t in top_tenure
             ]
 
         # Determine current leader.

bar_race/render.py

@@ -1298,10 +1298,10 @@ class FrameRenderer:
                           fill=(*accent_c, 200), font=self.font_watermark,
                           anchor="rb")
 
-        # --- bottom panel: three columns, ends at 75% height ----------------
-        panel_y = self._bar_area_bottom + 6
-        panel_max_y = int(self.H * 0.85)  # hard stop well above date
-        line_h = max(12, int(self.H * 0.014))
+        # --- bottom panel: three columns between bars and date ---------------
+        panel_y = self._bar_area_bottom + 4
+        panel_max_y = int(self.H * 0.93) - 10  # stop above the date
+        line_h = max(11, int(self.H * 0.014))
         header_c = (*text_c, 178)
         row_c = (*text2_c, 110)
         panel_w = int(self.W * 0.68)