fix: resolve critical bugs - disciplines, debug reset, floating point, spire loop

Fixes:
- Issue 193: Remove unnecessary useEffect that set activeTab when spireMode is true, and redundant setAction('climb') in SpireCombatPage
- Issue 194: Fix signed_pact prerequisite check in checkDisciplinePrerequisites by accepting signedPacts param; add 'At Limit' feedback on discipline button when concurrent limit reached
- Issue 195: Add resetDisciplines(), resetAttunements(), resetCrafting() calls to createResetGame; add resetCrafting action to crafting store
- Issue 196: Fix floating point display in ElementStatsSection (mana pools) and GameStateDebug (time); fix duplicate 'Base Regen' label in ManaStatsSection

All 917 tests pass. Files stay under 400-line limit.

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

@@ -95,14 +95,8 @@ export const useDisciplineStore = create<DisciplineStore>()(
           if (nonPaused >= s.concurrentLimit) return s;
           if (!canProceedDiscipline(def, existing, gameState)) return s;
 
-          // Invoker disciplines require at least one signed guardian pact
-          if (def.attunement === 'invoker') {
-            const signedPacts = gameState?.signedPacts || [];
-            if (signedPacts.length === 0) return s;
-          }
-
           // Check discipline prerequisites (requires field → discipline XP or mana type unlock)
-          const prereqCheck = checkDisciplinePrerequisites(def, s.disciplines, ALL_DISCIPLINES, gameState?.elements);
+          const prereqCheck = checkDisciplinePrerequisites(def, s.disciplines, ALL_DISCIPLINES, gameState?.elements, gameState?.signedPacts);
           if (!prereqCheck.canProceed) return s;
 
           // For conversion disciplines: gate on having all source mana types unlocked