fix(config): enforce runtime schema validation

src/lib/config.ts

@@ -122,29 +122,9 @@ export function reloadConfig() {
     const rawConfig = JSON.parse(raw);
 
     // Update config object in place
-    config.leveling = rawConfig.leveling;
-    config.economy = {
-        daily: {
-            ...rawConfig.economy.daily,
-            amount: BigInt(rawConfig.economy.daily.amount),
-            streakBonus: BigInt(rawConfig.economy.daily.streakBonus),
-        },
-        transfers: {
-            ...rawConfig.economy.transfers,
-            minAmount: BigInt(rawConfig.economy.transfers.minAmount),
-        },
-        exam: rawConfig.economy.exam,
-    };
-    config.inventory = {
-        ...rawConfig.inventory,
-        maxStackSize: BigInt(rawConfig.inventory.maxStackSize),
-    };
-    config.commands = rawConfig.commands || {};
-    config.lootdrop = rawConfig.lootdrop;
-    config.studentRole = rawConfig.studentRole;
-    config.visitorRole = rawConfig.visitorRole;
-    config.welcomeChannelId = rawConfig.welcomeChannelId;
-    config.welcomeMessage = rawConfig.welcomeMessage;
+    // We use Object.assign to keep the reference to the exported 'config' object same
+    const validatedConfig = configSchema.parse(rawConfig);
+    Object.assign(config, validatedConfig);
 
     console.log("🔄 Config reloaded from disk.");
 }