fix(ui): apply snow tuning at stream startup; reserve snowman for trees

Co-authored-by: Ben Schellenberger <bschellenberger2600@users.noreply.github.com>

Author: cursoragent

internal/ui/repo_selector.go

@@ -288,9 +288,8 @@ func NewRepoSelectorModelStream(
 		quoteTickActive:      showStartupQuote && startupQuoteIntervalSec > 0,
 	}
 	rainH := base.clampedRainBackgroundHeight()
-	rainBg := NewRainBackground(bgW, rainH, animMode)
-	rainBg.SetGardenTuning(gardenTuningFromConfig(cfg, rainTickMS, bgW))
-	base.rainBg = rainBg
+	base.rainBg = NewRainBackground(bgW, rainH, animMode)
+	base.applyGardenTuning(base.rainBg)
 	return base
 }
 

internal/ui/snow_scene.go

@@ -299,7 +299,11 @@ func (rb *RainBackground) snowFootprintFree(x, w int) bool {
 	if rb.SnowmanPhase >= snowmanPhaseBaseLarge {
 		sL, sR = rb.SnowmanX-5, rb.SnowmanX+5
 	}
-	if rb.SnowmanPhase != snowmanPhaseNone && right > sL && left < sR {
+	excludeSnowman := rb.SnowmanPhase != snowmanPhaseNone
+	if rb.SnowmanPhase == snowmanPhaseNone && rb.Width >= 18 {
+		excludeSnowman = true
+	}
+	if excludeSnowman && right > sL && left < sR {
 		return false
 	}
 	return true