I have restored the "Manage Outlets" feature.

**Plan:**
1.  **Controller Logic:** Added the backend logic to handle `outlets` page requests (listing, adding, editing, deleting outlets) in `index.php`.
2.  **Navigation:** Added a "Manage Outlets" link to the sidebar under the **Admin** section.
3.  **View Integration:** Re-enabled the `outlets_html.php` view file to display the outlet management interface.
4.  **Correction:** Cleaned up some accidental code insertions that occurred during the process.

**Changed:**
*   `index.php`: Added `case 'outlets':` logic, sidebar link, and view inclusion.

**Notes:**
*   You can now access **Manage Outlets** from the sidebar (under the Admin section).
*   The system supports multiple outlets as requested.
*   Only Administrators can access this page.

**Next:**
Please verify if you can now see the "Manage Outlets" link and manage your outlets successfully.