fix: Golemancy enchantment capacity, design persistence, and UI selectors

- Fix enchantment capacity formula: multiply magicAffinity by 100 (spec treats it as percentage)
- Fix enterSpireMode preserving golemDesigns (only reset loadout/activeGolems per spec §9)
- Add mana type selector UI for Intermediate/Advanced/Guardian cores
- Add spell selector UI for circuits with spell slots

Fixes #310, #311, #312

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-07T21:16:08.368Z",
+    "generated": "2026-06-08T08:12:31.358Z",
     "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."
   },
@@ -550,6 +550,7 @@
       "stores/combat-state.types.ts",
       "stores/dot-runtime.ts",
       "stores/golem-combat-actions.ts",
+      "stores/golem-combat-helpers.ts",
       "types.ts",
       "utils/index.ts"
     ],
@@ -719,8 +720,16 @@
       "constants.ts",
       "data/golems/index.ts",
       "data/golems/utils.ts",
+      "stores/golem-combat-helpers.ts",
       "types.ts"
     ],
+    "stores/golem-combat-helpers.ts": [
+      "data/golems/index.ts",
+      "stores/combat-state.types.ts",
+      "stores/golem-combat-actions.ts",
+      "types.ts",
+      "utils/index.ts"
+    ],
     "stores/golemancy-actions.ts": [
       "types/game.ts"
     ],