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/components/game/tabs/StatsTab/ElementStatsSection.tsx

@@ -5,7 +5,7 @@ import { DebugName } from '@/components/game/debug/debug-context';
 import { Separator } from '@/components/ui/separator';
 import { FlaskConical } from 'lucide-react';
 import { ELEMENTS } from '@/lib/game/constants';
-import { usePrestigeStore, useManaStore } from '@/lib/game/stores';
+import { usePrestigeStore, useManaStore, fmtDec } from '@/lib/game/stores';
 import type { ElementState } from '@/lib/game/types';
 
 interface ElementStatsSectionProps {
@@ -54,7 +54,7 @@ export function ElementStatsSection({ elemMax }: ElementStatsSectionProps) {
               return (
                 <div key={id} className="p-2 rounded transition-colors" style={{ border: `1px solid ${def?.color}30`, background: 'var(--bg-sunken)/50', textAlign: 'center' }}>
                   <div className="text-lg" style={{ color: def?.color }}>{def?.sym}</div>
-                  <div className="text-xs" style={{ color: 'var(--text-muted)' }}>{state.current}/{state.max}</div>
+                  <div className="text-xs" style={{ color: 'var(--text-muted)' }}>{fmtDec(state.current, 2)}/{fmtDec(state.max, 0)}</div>
                 </div>
               );
             })}

src/components/game/tabs/StatsTab/ManaStatsSection.tsx

@@ -90,7 +90,7 @@ export function ManaStatsSection({ stats, elemMax }: ManaStatsSectionProps) {
               <span style={{ color: 'var(--text-secondary)' }}>2/hr</span>
             </div>
             <div className="flex justify-between text-sm font-semibold border-t border-[var(--border-subtle)] pt-2">
-              <span style={{ color: 'var(--text-secondary)' }}>Base Regen:</span>
+              <span style={{ color: 'var(--text-secondary)' }}>Computed Base Regen:</span>
               <span style={{ color: 'var(--mana-water)' }}>{fmtDec(baseRegen, 2)}/hr</span>
             </div>
             {upgradeEffects.regenBonus > 0 && (