fix: #346 #345 spell casting guards and equipment spell wiring

Issue #346: Added floorHP > 0 guard to primary and equipment spell casting
while loops in combat-actions.ts. Previously spells continued casting and
draining mana after all enemies were dead.

Issue #345 Bug A: Populated equipmentSpellStates from equipped gear in
gameStore.ts combat tick setup using getActiveEquipmentSpells(). Previously
equipment spell enchantments (e.g., spell_manaBolt on casters) never fired
during combat because equipmentSpellStates was always empty.

Issue #345 Bug B: Added deductWeaponEnchantCosts() helper in combat-damage.ts
and wired it into the melee loop in combat-actions.ts. Weapon enchant spells
(fireBlade, frostBlade, lightningBlade, voidBlade) now properly deduct mana
per melee hit instead of providing free elemental bonus damage.

All 1141 tests pass (65 test files), no regressions. Added 5 new regression tests.

Files changed:
- combat-actions.ts: +floorHP>0 guards, weapon enchant cost deduction
- combat-damage.ts: +deductWeaponEnchantCosts() helper
- gameStore.ts: +equipment spell state population from equipped gear
- spell-cast-floorhp-guard.test.ts: new regression test file

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-10T09:19:24.358Z",
+    "generated": "2026-06-10T09:41:39.446Z",
     "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."
   },
@@ -564,6 +564,7 @@
       "effects/discipline-effects.ts",
       "stores/attunementStore.ts",
       "stores/combat-state.types.ts",
+      "stores/discipline-slice.ts",
       "stores/golem-combat-actions.ts",
       "stores/manaStore.ts",
       "stores/non-combat-room-actions.ts",
@@ -578,6 +579,7 @@
       "stores/combat-actions.ts",
       "stores/combat-descent-actions.ts",
       "stores/combat-state.types.ts",
+      "stores/discipline-slice.ts",
       "stores/golemancy-actions.ts",
       "stores/non-combat-room-actions.ts",
       "types.ts",
@@ -692,7 +694,6 @@
     ],
     "stores/gameStore.ts": [
       "constants.ts",
-      "data/attunements.ts",
       "data/guardian-encounters.ts",
       "effects.ts",
       "effects/discipline-effects.ts",
@@ -713,6 +714,7 @@
       "stores/tick-pipeline.ts",
       "stores/uiStore.ts",
       "types.ts",
+      "utils/conversion-params.ts",
       "utils/conversion-rates.ts",
       "utils/element-cap-bonus.ts",
       "utils/element-distance.ts",
@@ -872,6 +874,10 @@
       "types.ts",
       "utils/mana-utils.ts"
     ],
+    "utils/conversion-params.ts": [
+      "data/attunements.ts",
+      "data/guardian-encounters.ts"
+    ],
     "utils/conversion-rates.ts": [
       "data/conversion-costs.ts",
       "effects/discipline-effects.ts",
@@ -902,6 +908,7 @@
     ],
     "utils/index.ts": [
       "utils/combat-utils.ts",
+      "utils/conversion-params.ts",
       "utils/floor-utils.ts",
       "utils/formatting.ts",
       "utils/mana-utils.ts",