fix: re-render sidebar when module config loads

- Convert sidebar.js IIFE to window.renderSidebar() so it can be re-rendered
- Call window.renderSidebar(data) from app-init.js after fetching modules
- Ensures sidebar reflects actual tenant module config, not stale localStorage

pos/static/js/app-init.js

@@ -190,6 +190,9 @@
             if (data) {
                 localStorage.setItem('pos_modules', JSON.stringify(data));
                 window.POS_USER.modules = data;
+                if (typeof window.renderSidebar === 'function') {
+                    window.renderSidebar(data);
+                }
             }
         }).catch(function() {});
     } catch(e) {}