Fix Song of Storms: Rain persists across transitions, dismissal works from any area

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Menu/menu_hud.asm

@@ -551,7 +551,9 @@ org $0AFD0C
 FloorIndicator:
 {
   REP   #$30
-  LDA   $04A0 : AND.w #$00FF : BEQ .hide_indicator
+  LDA   $04A0 : AND.w #$00FF : BNE +
+    JMP .hide_indicator
+  +
   INC   A : CMP.w #$00C0 : BNE .dont_disable
     ; if the count up timer reaches 0x00BF frames
     ; disable the floor indicator during the next frame.
@@ -575,7 +577,12 @@ FloorIndicator:
   LDA   $A0 : CMP.w #$0002 : BEQ .sanctuary_rat_room
   SEP   #$20
 
-  ; Check the world state
+  ; Check if Song of Storms rain is active
+  LDA.l $7EE00E : BEQ .checkIntroRain
+    LDA.b #$05 : STA $012D  ; Indoor rain SFX
+    BRA .no_rain_state
+  .checkIntroRain
+  ; Check the world state (intro rain)
   LDA   $7EF3C5 : CMP.b #$02 : BCS .no_rain_state
     ; cause the ambient rain sound to occur (indoor version)
     LDA.b #$05 : STA $012D