feat(cms): enhance content editors and implement automatic ID generation

Improve the CMS administration interface across multiple pages (Accreditation, Admissions, History, Partnerships, and Policies) with a focus on usability and data integrity.
Key changes include:
- Implement `ensureUniqueIds` utility to automatically generate and maintain unique slugs for content items, removing the need for manual ID entry in the UI.
- Refactor the Admissions calculator to support detailed per-option editing via a new dedicated view and routes.
- Replace basic datalists with a custom, searchable icon combobox component for better visual selection.
- Update `_renderSingletonPageView` to handle active tab persistence via query parameters.
- Streamline editor configurations by removing redundant fields and improving help text.
- Enhance the Admissions "Key Dates" editor with a dynamic table interface for managing columns and rows.
- Normalize data payloads in controllers to ensure consistent API responses and internal linking.

views/admin/partnerships/partials/templates.ejs

@@ -46,11 +46,6 @@
     </div>
     <div class="card-body">
       <div class="row g-3">
-        <div class="col-md-4">
-          <label class="form-label fw-semibold">Partner key</label>
-          <input class="form-control" data-field="id" maxlength="50">
-          <div class="form-text">Use a short unique key.</div>
-        </div>
         <div class="col-md-4">
           <label class="form-label fw-semibold">Partner name</label>
           <input class="form-control" data-field="name" maxlength="90">
@@ -119,10 +114,6 @@
     </div>
     <div class="card-body">
       <div class="row g-3">
-        <div class="col-md-4">
-          <label class="form-label fw-semibold">Field key</label>
-          <input class="form-control" data-field="id" maxlength="40">
-        </div>
         <div class="col-md-4">
           <label class="form-label fw-semibold">Field label</label>
           <input class="form-control" data-field="label" maxlength="40">