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/popular.controller.js

@@ -1,6 +1,43 @@
+/*
+ * ======= • ======= • ======= • ======= • =======• =======
+ * AniKatoAPI — popular.controller.js
+ * Repository: https://github.com/Shineii86/AniKatoAPI
+ *
+ * @description
+ *   Controller for most popular anime list. Returns paginated list
+ *   of the most popular anime from the source site. Supports page
+ *   parameter for pagination.
+ *
+ * @exports
+ *   getPopular - Express route handler for GET /api/most-popular
+ *
+ * @author  Shinei Nouzen
+ * @license MIT
+ * ======= • ======= • ======= • ======= • =======• =======
+ */
+
 import { extractPopular } from "../extractors/popular.extractor.js";
 import { getCache, setCache } from "../helper/cache.helper.js";
 
+// ══════════════════════════════════════════════════════════════
+// CONTROLLER: POPULAR
+// ══════════════════════════════════════════════════════════════
+
+// ---- FEATURE: Most popular anime endpoint ----
+/**
+ * Handles GET /api/most-popular requests. Returns paginated list
+ * of the most popular anime from the source site.
+ *
+ * @param {object} req - Express request object
+ * @param {number} req.query.page - Page number (default: 1)
+ * @param {object} res - Express response object
+ * @param {Function} next - Express next middleware function
+ * @returns {void} Sends JSON response with popular anime list
+ *
+ * @example
+ *   GET /api/most-popular?page=2
+ *   Response: { success: true, results: { anime, pagination, ... } }
+ */
 const getPopular = async (req, res, next) => {
   try {
     const { page = 1 } = req.query;
@@ -9,7 +46,6 @@ const getPopular = async (req, res, next) => {
     if (cached) {
       return res.json({ success: true, results: cached });
     }
-
     const data = await extractPopular(page);
     setCache(cacheKey, data);
     res.json({ success: true, results: data });
@@ -18,4 +54,6 @@ const getPopular = async (req, res, next) => {
   }
 };
 
-export { getPopular };
+export { getPopular };
+
+// ══════════════════════════════════════════════════════════════ END: popular.controller.js