refactor: wire design-actions.ts into craftingStore.ts, remove dead code

- Delegates startDesigningEnchantment, cancelDesign, saveDesign, deleteDesign to design-actions.ts
- Passes enchanter level from attunement store to startDesigningEnchantment (fixes hardcoded 0)
- Removes orphaned disenchant-actions.ts (preparation phase handles recovery inline)
- Removes unused imports (CraftingUtils, CraftingDesign, useUIStore)
- Updates regression test to check design-actions.ts instead of craftingStore.ts

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-14T21:49:13.932Z",
+    "generated": "2026-06-15T08:59:01.387Z",
     "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."
   },
@@ -542,6 +542,7 @@
       "stores/attunementStore.ts",
       "stores/combatStore.ts",
       "stores/craftingStore.ts",
+      "stores/discipline-slice.ts",
       "stores/gameStore.ts",
       "stores/manaStore.ts",
       "stores/prestigeStore.ts",