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.

data/accreditation.json

@@ -1,20 +1,4 @@
 {
-  "trustBanner": {
-    "icon": "fa-shield-check",
-    "text": "All our programs are rigorously evaluated and internationally recognized.",
-    "links": [
-      {
-        "label": "Verify Status",
-        "href": "#accreditations-grid",
-        "icon": "fa-magnifying-glass"
-      },
-      {
-        "label": "View Legal Disclaimers",
-        "href": "#accreditations-grid",
-        "icon": ""
-      }
-    ]
-  },
   "hero": {
     "badge": "Accreditation Save Check",
     "title": "ACCREDITATION AND RECOGNITION",
@@ -91,4 +75,4 @@
       }
     ]
   }
-}
+}