fix(#165,#166,#167,#168,#169,#171,#172): resolve 7 open bug issues

#172 - Grimoire tab: removed dead 'loaded' state guard that permanently showed loading
#169 - Transference Mana Flow: added elements param to checkDisciplinePrerequisites so mana type unlocks are verified
#168 - Perk descriptions: wired 4 broken perks (enchant-2, channel-1, golem-2, efficiency-1) with actual bonus effects; fixed enchant-1 interval (5→50); fixed study-mana-enchantments stat (maxMana→maxManaBonus)
#171 - Shields: removed all shield equipment (4 types), recipes, category, slot mappings; added 'shields' to AGENTS.md banned list
#166 - regenMultiplier: merged disciplineEffects.multipliers.regenMultiplier into computeAllEffects()
#165 - Meditation cap: added meditationCap display to ManaStatsSection UI; updated perk description
#167 - XP accumulation: added Meditative Mastery base discipline with disciplineXpBonus stat; wired into tick pipeline

src/components/game/tabs/DisciplinesTab.tsx

@@ -257,7 +257,7 @@ export const DisciplinesTab: React.FC = () => {
       <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
         {activeTab?.items.map((disc) => {
           const discState = disciplines[disc.id] ?? { xp: 0, paused: true };
-          const prereqCheck = checkDisciplinePrerequisites(disc, disciplines, ALL_DISCIPLINES);
+          const prereqCheck = checkDisciplinePrerequisites(disc, disciplines, ALL_DISCIPLINES, elements);
           return (
             <DisciplineCard
               key={disc.id}