fix: deduct component consumption from element pools in mana conversion

Bug #293: elementDrain was computed but never subtracted from element pools.
The tick pipeline now applies net regen (produced - drained) instead of
gross production to element pools, matching the spec §8 regen deduction model.

docs/circular-deps.txt

@@ -1,5 +1,5 @@
 # Circular Dependencies
-Generated: 2026-06-08T09:39:59.023Z
+Generated: 2026-06-08T09:52:22.958Z
 Found: 1 circular chain(s) — these MUST be fixed before modifying involved files.
 
 1. 1) stores/golem-combat-actions.ts > stores/golem-combat-helpers.ts

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-08T09:39:57.039Z",
+    "generated": "2026-06-08T09:52:20.951Z",
     "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."
   },

docs/project-structure.txt

@@ -229,6 +229,7 @@ Mana-Loop/
 │   │   │   │   ├── formatting.test.ts
 │   │   │   │   ├── guardian-names.test.ts
 │   │   │   │   ├── hasty-enchanter.test.ts
+│   │   │   │   ├── mana-conversion-component-deduction.test.ts
 │   │   │   │   ├── mana-utils.test.ts
 │   │   │   │   ├── melee-auto-attack.test.ts
 │   │   │   │   ├── melee-defense-bypass.test.ts