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/circular-deps.txt

@@ -1,5 +1,5 @@
 # Circular Dependencies
-Generated: 2026-06-10T11:09:41.397Z
+Generated: 2026-06-10T11:13:04.646Z
 Found: 3 circular chain(s) — these MUST be fixed before modifying involved files.
 
 1. 1) stores/golem-combat-actions.ts > stores/golem-combat-helpers.ts