fix: apply mana drain when practicing disciplines

- processTick() now calls calculateManaDrain() for non-conversion disciplines
- Insufficient mana triggers auto-paused state (skips XP accrual)
- Conversion disciplines (sourceManaTypes) correctly skip pool drain
- Auto-paused disciplines can be re-activated when mana is restored
- Updated 7 tests across 3 files to reflect drain model

docs/circular-deps.txt

@@ -1,5 +1,5 @@
 # Circular Dependencies
-Generated: 2026-06-10T08:00:19.784Z
+Generated: 2026-06-10T08:14:33.822Z
 Found: 2 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": "2026-06-10T08:00:17.492Z",
+    "generated": "2026-06-10T08:14:31.514Z",
     "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."
   },