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/contentEditorIds.js

@@ -0,0 +1,35 @@
+function slugifyContentId(value, fallback = "item") {
+  const normalized = String(value || "")
+    .trim()
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, "-")
+    .replace(/^-+|-+$/g, "");
+
+  return normalized || fallback;
+}
+
+function ensureUniqueIds(items, getExistingId, getSourceValue, fallbackPrefix) {
+  const usedIds = new Set();
+
+  return (Array.isArray(items) ? items : []).map((item, index) => {
+    const existingId = String(getExistingId(item, index) || "").trim();
+    let nextId = existingId || slugifyContentId(getSourceValue(item, index), `${fallbackPrefix}-${index + 1}`);
+    let suffix = 2;
+
+    while (usedIds.has(nextId)) {
+      nextId = `${existingId || slugifyContentId(getSourceValue(item, index), fallbackPrefix)}-${suffix}`;
+      suffix += 1;
+    }
+
+    usedIds.add(nextId);
+    return {
+      ...item,
+      id: nextId,
+    };
+  });
+}
+
+module.exports = {
+  slugifyContentId,
+  ensureUniqueIds,
+};