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/StatsTab.tsx

@@ -25,7 +25,11 @@ export function StatsTab() {
   return (
     <div className="space-y-4">
       <ManaStatsSection
-        stats={{ ...manaStats, rawMana: manaStats.maxMana }}
+        stats={{
+          ...manaStats,
+          rawMana: manaStats.maxMana,
+          meditationCap: manaStats.meditationCap,
+        }}
         elemMax={elemMax}
       />
       <CombatStatsSection