Fix Task 9: Climb/Descend Controls

1. Fixed exitSpireMode in store.ts to allow exit at any floor for re-entry resume
2. Removed floor restriction on Exit Spire button in page.tsx
3. Updated descend button label to use currentAction for 'Climbing' status

src/lib/game/store.ts

@@ -2306,13 +2306,10 @@ export const useGameStore = create<GameStore>()(
         }, 500);
       },
 
-      // Exit Spire Mode - only works when at floor 1
+      // Exit Spire Mode - can exit at any floor (re-entry will resume at same floor)
       exitSpireMode: () => {
         set((state) => {
-          // Only allow exit if at floor 1 (bottom)
-          if (state.currentFloor > 1) {
-            return state; // Can't exit, need to climb down to floor 1 first
-          }
+          // Allow exit at any floor for re-entry resume
           return {
             spireMode: false,
             currentAction: 'meditate',