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/DisciplineCard.tsx

@@ -13,6 +13,7 @@ export interface DisciplineCardProps {
   definition: DisciplineDefinition;
   xp: number;
   paused: boolean;
+  activeIds: string[];
   concurrentLimit: number;
   isLocked: boolean;
   missingPrereqs: string[];
@@ -23,7 +24,7 @@ export interface DisciplineCardProps {
 // ─── Component ────────────────────────────────────────────────────────────────
 
 export const DisciplineCard: React.FC<DisciplineCardProps> = ({
-  definition, xp, paused: isPaused, concurrentLimit,
+  definition, xp, paused: isPaused, activeIds, concurrentLimit,
   isLocked, missingPrereqs, missingSourceMana, onToggle,
 }) => {
   const {
@@ -41,6 +42,12 @@ export const DisciplineCard: React.FC<DisciplineCardProps> = ({
   const manaColor = elementDef?.color ?? '#888888';
   const manaIcon = elementDef?.sym ?? '✦';
   const manaName = elementDef?.name ?? manaType;
+  const isActive = activeIds.includes(id);
+  const activeNotPaused = activeIds.filter((aid) => {
+    // Count how many active disciplines are not paused
+    return aid === id ? !isPaused : true;
+  }).length;
+  const atConcurrentLimit = !isActive && activeIds.length >= concurrentLimit;
   const effectiveIsLocked = isLocked || missingSourceMana.length > 0;
   const statBonusLabel = statBonus.label;
 
@@ -140,9 +147,16 @@ export const DisciplineCard: React.FC<DisciplineCardProps> = ({
       </div>
 
       {/* Lock Reasons */}
-      {effectiveIsLocked && (missingPrereqs.length > 0 || missingSourceMana.length > 0) && (
+      {(effectiveIsLocked || atConcurrentLimit) && (missingPrereqs.length > 0 || missingSourceMana.length > 0 || atConcurrentLimit) && (
         <div className="mt-2 text-xs text-red-400">
-          <strong>Requires:</strong> {[...missingPrereqs, ...missingSourceMana].join(', ')}
+          {atConcurrentLimit && <div><strong>At limit:</strong> {activeIds.length}/{concurrentLimit} disciplines active</div>}
+          {missingPrereqs.length > 0 && <div><strong>Requires:</strong> {missingPrereqs.join(', ')}</div>}
+          {missingSourceMana.length > 0 && <div><strong>Missing mana:</strong> {missingSourceMana.join(', ')}</div>}
+        </div>
+      )}
+      {atConcurrentLimit && missingPrereqs.length === 0 && missingSourceMana.length === 0 && (
+        <div className="mt-2 text-xs text-amber-400">
+          <strong>At limit:</strong> {activeIds.length}/{concurrentLimit} disciplines active. Gain XP to unlock more slots.
         </div>
       )}
 
@@ -150,17 +164,23 @@ export const DisciplineCard: React.FC<DisciplineCardProps> = ({
       <div className="mt-4 flex justify-end">
         <button
           onClick={() => onToggle(id, isPaused)}
-          disabled={effectiveIsLocked}
+          disabled={effectiveIsLocked || atConcurrentLimit}
           className={clsx(
             'rounded px-3 py-1 text-sm font-medium',
-            effectiveIsLocked
+            effectiveIsLocked || atConcurrentLimit
               ? 'bg-gray-600 text-gray-400 cursor-not-allowed'
               : isPaused
                 ? 'bg-yellow-600 text-white hover:bg-yellow-500'
                 : 'bg-blue-600 text-white hover:bg-blue-500',
           )}
         >
-          {effectiveIsLocked ? 'Locked' : isPaused ? 'Start Practicing' : 'Stop Practicing'}
+          {effectiveIsLocked
+            ? 'Locked'
+            : atConcurrentLimit
+              ? `At Limit (${activeIds.length}/${concurrentLimit})`
+              : isPaused
+                ? 'Start Practicing'
+                : 'Stop Practicing'}
         </button>
       </div>
     </div>

src/components/game/tabs/DisciplinesTab.tsx

@@ -41,6 +41,7 @@ const ATTUNEMENT_TABS: AttunementTab[] = [
 interface CardWrapperProps {
   disc: DisciplineDefinition;
   disciplines: Record<string, { xp: number; paused: boolean }>;
+  activeIds: string[];
   concurrentLimit: number;
   elements: ReturnType<typeof useManaStore.getState>['elements'];
   signedPacts: ReturnType<typeof usePrestigeStore.getState>['signedPacts'];
@@ -48,15 +49,16 @@ interface CardWrapperProps {
 }
 
 const CardWrapper: React.FC<CardWrapperProps> = ({
-  disc, disciplines, concurrentLimit, elements, onToggle,
+  disc, disciplines, activeIds, concurrentLimit, elements, signedPacts, onToggle,
 }) => {
   const discState = disciplines[disc.id] ?? { xp: 0, paused: true };
-  const prereqCheck = checkDisciplinePrerequisites(disc, disciplines, ALL_DISCIPLINES, elements);
+  const prereqCheck = checkDisciplinePrerequisites(disc, disciplines, ALL_DISCIPLINES, elements, signedPacts);
   return (
     <DisciplineCard
       definition={disc}
       xp={discState.xp}
       paused={discState.paused}
+      activeIds={activeIds}
       concurrentLimit={concurrentLimit}
       isLocked={!prereqCheck.canProceed}
       missingPrereqs={prereqCheck.missingPrereqs}
@@ -129,6 +131,7 @@ export const DisciplinesTab: React.FC = () => {
               key={disc.id}
               disc={disc}
               disciplines={disciplines}
+              activeIds={activeIds}
               concurrentLimit={concurrentLimit}
               elements={elements}
               signedPacts={signedPacts}

src/components/game/tabs/SpireCombatPage/SpireCombatPage.tsx

@@ -113,8 +113,7 @@ export function SpireCombatPage() {
     setRoomsCleared(0);
     const newRoom = generateSpireFloorState(currentFloor, 0, totalRooms);
     setCurrentRoom(newRoom);
-    setAction('climb');
-  }, [currentFloor, totalRooms, setCurrentRoom, setAction]);
+  }, [currentFloor, totalRooms, setCurrentRoom]);
 
   const _handleRoomCleared = () => {
     const nextRoomIndex = roomsCleared + 1;

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 && (