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

@@ -10,6 +10,7 @@ import {
   checkDisciplinePrerequisites,
   getUnlockedPerks
 } from '../utils/discipline-math';
+import { computeDisciplineEffects } from '../effects/discipline-effects';
 import { baseDisciplines } from '../data/disciplines/base';
 import { elementalAttunementDisciplines } from '../data/disciplines/elemental';
 import { elementalRegenDisciplines } from '../data/disciplines/elemental-regen';
@@ -99,8 +100,8 @@ export const useDisciplineStore = create<DisciplineStore>()(
             if (signedPacts.length === 0) return s;
           }
 
-          // Check discipline prerequisites (requires field → discipline XP)
-          const prereqCheck = checkDisciplinePrerequisites(def, s.disciplines, ALL_DISCIPLINES);
+          // Check discipline prerequisites (requires field → discipline XP or mana type unlock)
+          const prereqCheck = checkDisciplinePrerequisites(def, s.disciplines, ALL_DISCIPLINES, gameState?.elements);
           if (!prereqCheck.canProceed) return s;
 
           // For conversion disciplines: gate on having all source mana types unlocked
@@ -183,8 +184,10 @@ export const useDisciplineStore = create<DisciplineStore>()(
           }
 
           const oldXP = disc.xp;
-          newDisciplines[id] = { ...disc, xp: disc.xp + 1 };
-          newXP += 1;
+          const xpBonus = computeDisciplineEffects().bonuses.disciplineXpBonus || 0;
+          const xpGain = 1 + xpBonus;
+          newDisciplines[id] = { ...disc, xp: disc.xp + xpGain };
+          newXP += xpGain;
 
           // Check for newly unlocked perks that unlock effects
           if (def.perks.length > 0) {