v1.5.0: Complete documentation rewrite - 50+ files with AlisaReactionBot style

- Box-style header comments (Project, Author, License) on every file
- Section headers using double-line box decorators
- Feature markers (// ---- FEATURE: XYZ ----) before every major function
- JSDoc comments for EVERY function with @param, @returns, @example
- Inline notes (NOTE, WARNING, TIP) for non-obvious logic
- Footer END markers on every module
- Matched code style to AlisaReactionBot repository
- All files now searchable by feature name via grep

Author: Shinei Nouzen <157171073+Shineii86@users.noreply.github.com>

src/controllers/trending.controller.js

@@ -1,6 +1,42 @@
+/*
+ * ======= • ======= • ======= • ======= • =======• =======
+ * AniKatoAPI — trending.controller.js
+ * Repository: https://github.com/Shineii86/AniKatoAPI
+ *
+ * @description
+ *   Controller for currently trending anime data. Returns a list
+ *   of anime that are currently popular/trending on the source site.
+ *   No parameters required - returns fixed trending content.
+ *
+ * @exports
+ *   getTrending - Express route handler for GET /api/trending
+ *
+ * @author  Shinei Nouzen
+ * @license MIT
+ * ======= • ======= • ======= • ======= • =======• =======
+ */
+
 import { extractTrending } from "../extractors/trending.extractor.js";
 import { getCache, setCache } from "../helper/cache.helper.js";
 
+// ══════════════════════════════════════════════════════════════
+// CONTROLLER: TRENDING
+// ══════════════════════════════════════════════════════════════
+
+// ---- FEATURE: Trending anime endpoint ----
+/**
+ * Handles GET /api/trending requests. Returns currently trending
+ * anime from the source site.
+ *
+ * @param {object} req - Express request object
+ * @param {object} res - Express response object
+ * @param {Function} next - Express next middleware function
+ * @returns {void} Sends JSON response with trending anime list
+ *
+ * @example
+ *   GET /api/trending
+ *   Response: { success: true, results: [{ title, rank, ... }] }
+ */
 const getTrending = async (req, res, next) => {
   try {
     const cacheKey = "trending";
@@ -8,7 +44,6 @@ const getTrending = async (req, res, next) => {
     if (cached) {
       return res.json({ success: true, results: cached });
     }
-
     const data = await extractTrending();
     setCache(cacheKey, data);
     res.json({ success: true, results: data });
@@ -17,4 +52,6 @@ const getTrending = async (req, res, next) => {
   }
 };
 
-export { getTrending };
+export { getTrending };
+
+// ══════════════════════════════════════════════════════════════ END: trending.controller.js