style: fix eqeqeq lint warnings in codeManager

Replace == null with === undefined (count is number | undefined, null
is impossible) and != null with !== null && !== undefined for the
unknown-typed lootDetail parameter.

Signed-off-by: Michael Cramer <michael@bigmichi1.de>

Author: BigMichi1

src/bot/database/codeManager.ts

@@ -50,7 +50,7 @@ function parseLootEntries(
     if (typeof entry !== 'object' || entry === null) continue;
     const e = entry as Record<string, unknown>;
     const count = typeof e['count'] === 'number' ? e['count'] : undefined;
-    if (count == null || !Number.isFinite(count) || count <= 0) continue;
+    if (count === undefined || !Number.isFinite(count) || count <= 0) continue;
     if ('chest_type_id' in e && typeof e['chest_type_id'] === 'number') {
       const name = CHEST_TYPE_NAMES[e['chest_type_id'] as number] ?? `Chest ${e['chest_type_id']}`;
       entries.push({ key: name, type: 'chest', count });
@@ -71,7 +71,7 @@ class CodeManager {
     isPublic: boolean = false
   ): Promise<void> {
     const normalizedStatus = normalizeCodeStatus(status);
-    const lootStr = lootDetail != null ? JSON.stringify(lootDetail) : null;
+    const lootStr = lootDetail !== null && lootDetail !== undefined ? JSON.stringify(lootDetail) : null;
     db.insert(redeemedCodes)
       .values({
         code,