fix(title): restore subtle glow alpha (0.22)

The hex-removal correction set _glow.color = Palette.BLOOD (opaque), which
with the 0.5-0.8 modulate pulse read as a near-solid red slab. Restore the
intended low alpha via Color(Palette.BLOOD, 0.22) — RGB still from Palette,
alpha a numeric param (same idiom as the ember ramp). Whole-branch review
catch. Title tests 5/5.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

client/scripts/ui/title/title_screen.gd

@@ -29,7 +29,9 @@ func _ready() -> void:
 
 	_background.color = Palette.STAGE_1
 	_rule.color = Palette.GOLD
-	_glow.color = Palette.BLOOD
+	# RGB from Palette, low alpha so the fire glow is subtle (the pulse tween varies
+	# modulate:a on top of this); a fully-opaque BLOOD read as a solid red slab.
+	_glow.color = Color(Palette.BLOOD, 0.22)
 	_apply_background()
 	_configure_embers()
 	_pulse_glow()