fix: resolve ReferenceError in enterSpireMode - use get() instead of undefined s variable

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-09T09:18:55.072Z",
+    "generated": "2026-06-09T10:03:39.823Z",
     "description": "Import dependency graph for src/lib/game. Keys are files, values are arrays of files they import.",
     "usage": "To find what a file affects, search for its path in the VALUES. To find what a file depends on, look at its KEY entry."
   },
@@ -422,9 +422,6 @@
       "data/equipment/types.ts",
       "data/equipment/utils.ts"
     ],
-    "data/equipment/shields.ts": [
-      "data/equipment/types.ts"
-    ],
     "data/equipment/swords.ts": [
       "data/equipment/types.ts"
     ],
@@ -775,6 +772,7 @@
       "data/guardian-encounters.ts",
       "effects/special-effects.ts",
       "effects/upgrade-effects.types.ts",
+      "stores/attunementStore.ts",
       "stores/combat-state.types.ts",
       "stores/golem-combat-actions.ts",
       "types.ts"