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/utils/discipline-math.ts

@@ -116,6 +116,7 @@ export function checkDisciplinePrerequisites(
   discipline: DisciplineDefinition,
   allDisciplines: Record<string, DisciplineState>,
   allDefinitions: DisciplineDefinition[],
+  elements?: Record<string, { unlocked: boolean }>,
 ): { canProceed: boolean; missingPrereqs: string[] } {
   if (!discipline.requires || discipline.requires.length === 0) {
     return { canProceed: true, missingPrereqs: [] };
@@ -138,10 +139,13 @@ export function checkDisciplinePrerequisites(
         missingPrereqs.push(reqDef?.name ?? reqId);
       }
     } else {
-      // Treat as mana type requirement — display as "<name> mana"
+      // Treat as mana type requirement — verify against player's unlocked elements
       const typeName = MANA_TYPE_NAMES[reqId];
       if (typeName) {
-        missingPrereqs.push(`${typeName} mana`);
+        const elementState = elements?.[reqId];
+        if (!elementState || !elementState.unlocked) {
+          missingPrereqs.push(`${typeName} mana`);
+        }
       } else {
         missingPrereqs.push(reqId);
       }