Moved joinPaths to BaseController as a protected static function + refactored large chunks of Router to work with the new stuff

src/controllers/BaseController.ts

@@ -1,5 +1,26 @@
 import type { Application } from 'express';
 
 export abstract class BaseController {
+    /** Helper function to join paths cleanly */
+    protected static joinPaths(base: string, path: string): string {
+        // Combine the base path and the specific route path
+        let fullPath = base + path;
+
+        // Remove double slashes (e.g., //user -> /user)
+        fullPath = fullPath.replace(/\/\//g, '/');
+                    
+        // Ensure it starts with / (in case base was empty and path was empty)
+        if (!fullPath.startsWith('/')) {
+            fullPath = '/' + fullPath;
+        }
+                    
+        // Remove trailing slash (optional, unless it's just root '/')
+        if (fullPath.length > 1 && fullPath.endsWith('/')) {
+            fullPath = fullPath.slice(0, -1);
+        }
+                    
+        return fullPath;
+    }
+
     static setup(app: Application) {}
 }