fix: discipline reset on mana depletion and re-activation after stop

- #143: processTick now removes drained disciplines from activeIds and calls onStopPracticing so currentAction resets to 'meditate'
- #144: Removed paused guard from canProceedDiscipline so stopped disciplines can be re-activated
- Updated test to match new expected behavior for paused disciplines

src/lib/game/stores/discipline-slice.ts

@@ -154,6 +154,7 @@ export const useDisciplineStore = create<DisciplineStore>()(
         const newUnlockedEffects: string[] = [];
         const newProcessedPerks = [...s.processedPerks];
 
+        const drainedIds: string[] = [];
         for (const id of s.activeIds) {
           const disc = newDisciplines[id];
           if (!disc) continue;
@@ -168,6 +169,7 @@ export const useDisciplineStore = create<DisciplineStore>()(
 
           if (!available || available < drain) {
             newDisciplines[id] = { ...disc, paused: true };
+            drainedIds.push(id);
             continue;
           }
 
@@ -206,8 +208,15 @@ export const useDisciplineStore = create<DisciplineStore>()(
           MAX_CONCURRENT_DISCIPLINES + 3
         );
 
+        // Remove mana-drained disciplines from activeIds so onStopPracticing fires
+        const newActiveIds = s.activeIds.filter((aid) => !drainedIds.includes(aid));
+        if (newActiveIds.length === 0 && s.activeIds.length > 0) {
+          get().practicingCallbacks?.onStopPracticing?.();
+        }
+
         set({
           disciplines: newDisciplines,
+          activeIds: newActiveIds,
           totalXP: newXP,
           concurrentLimit: Math.max(s.concurrentLimit, newLimit),
           processedPerks: newProcessedPerks,