fix: resolve 3 critical bugs — #354 attunement ReferenceError, #353 preparation mana exploit, #352 golem mana wipe

- #354: unlockAttunement now uses _get() instead of undefined 'state' variable
- #353: startPreparing now deducts raw mana from the mana store after validation
- #352: processGolemAttacks/processBasicAttack accept current mana as params instead of initializing to 0/{}
- Updated golem-combat-actions.test.ts to pass new currentRawMana/currentElements params
- Added regression tests for all 3 bugs (16 new tests, all passing)

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-10T11:09:38.970Z",
+    "generated": "2026-06-10T11:13:02.589Z",
     "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."
   },