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.

utils/contentEditors/accreditationConfig.js

@@ -3,7 +3,6 @@ const {
   textarea,
   image,
   icon,
-  url,
   select,
   combobox,
   object,
@@ -19,40 +18,13 @@ const statusOptions = [
 module.exports = {
   key: "accreditation",
   title: "Accreditation Management",
-  subtitle: "Edit content displayed on the accreditation page",
+  subtitle: "Manage the content for the accreditation page",
   routeBase: "/admin/accreditation",
   apiPath: "/api/accreditation",
   previewPath: "/about/accreditation",
   dataFile: "accreditation",
   imageType: "accreditation",
   tabs: [
-    {
-      key: "trustBanner",
-      label: "Trust Banner",
-      icon: "fas fa-shield-check",
-      schema: object("trustBanner", "Trust banner", [
-        icon("icon", "Banner icon"),
-        text("text", "Banner message", {
-          maxLength: 120,
-          helpText:
-            "This is the slim credibility strip shown above the accreditation content.",
-        }),
-        objectList(
-          "links",
-          "Banner links",
-          [
-            text("label", "Link label", { maxLength: 40 }),
-            url("href", "Link URL", { maxLength: 255 }),
-            icon("icon", "Link icon"),
-          ],
-          {
-            itemLabel: "Link",
-            sortable: true,
-            emptyText: "No trust banner links yet.",
-          },
-        ),
-      ]),
-    },
     {
       key: "hero",
       label: "Hero",
@@ -72,8 +44,7 @@ module.exports = {
           itemLabel: "Tab",
           maxLength: 30,
           sortable: true,
-          helpText:
-            "The frontend shows up to 3 direct tabs. Additional tabs move into a More dropdown.",
+          helpText: "Add and reorder the category tabs shown on the page.",
         }),
         objectList(
           "items",
@@ -82,7 +53,7 @@ module.exports = {
             icon("icon", "Fallback icon"),
             image("image", "Card image", {
               imageHint: "Recommended 118x58 px minimum visible ratio",
-              helpText: "Logo or badge used at the top of the card.",
+              helpText: "Logo or badge shown at the top of the card.",
             }),
             select("status", "Status", statusOptions),
             combobox("category", "Category", {
@@ -91,19 +62,13 @@ module.exports = {
             }),
             text("title", "Card title", {
               maxLength: 17,
-              helpText: "Frontend title space is capped at 17 characters.",
+              helpText: "Keep this very short. Around 17 characters fits best in the card title area.",
             }),
             textarea("description", "Card description", {
               maxLength: 300,
               rows: 5,
-              helpText: "Frontend description preview is capped at 300 characters.",
+              helpText: "Keep this concise. Around 300 characters fits best in the card description area.",
             }),
-            text("scopeLabel", "Scope label", { maxLength: 20 }),
-            text("scope", "Scope text", { maxLength: 60 }),
-            text("validUntilLabel", "Validity label", { maxLength: 24 }),
-            text("validUntil", "Validity text", { maxLength: 40 }),
-            text("buttonLabel", "Certificate button label", { maxLength: 30 }),
-            url("certificateHref", "Certificate URL", { maxLength: 255 }),
           ],
           {
             itemLabel: "Accreditation",