feat(cms): add management for partnerships, history, accreditation, admissions, and policies pages

Implement a singleton page content system to manage static informational pages. This includes:
- New controllers, models, and data files for Partnerships, History, Accreditation, Admissions, and Policies.
- Admin routes and views for updating page content.
- Public API endpoints for fetching page data.
- Migration scripts for initializing page data.
- Updated admin navigation layout to include a dropdown for "About" sections.
- Audit action constants for tracking updates to these pages.

views/admin/pageContent/index.ejs

@@ -0,0 +1,73 @@
+<div class="container">
+  <div class="d-flex justify-content-between align-items-center mt-4 mb-4">
+    <div>
+      <h1 class="h3 mb-0" style="color: var(--primary-dark)"><%= title %></h1>
+      <p class="text-muted mb-0"><%= subtitle %></p>
+    </div>
+    <div>
+      <a href="<%= previewUrl %>" class="btn btn-outline-primary" target="_blank">
+        <i class="fas fa-external-link-alt me-2"></i>View Page
+      </a>
+    </div>
+  </div>
+
+  <div class="row">
+    <div class="col-12">
+      <form
+        action="<%= editorConfig.routeBase %>/update"
+        method="POST"
+        id="pageContentForm"
+        class="content-with-fixed-buttons"
+      >
+        <input type="hidden" name="pageJson" id="pageJson" />
+        <input type="hidden" name="activeTab" id="activeTabInput" value="<%= activeTab %>" />
+
+        <div class="card shadow-sm border-0 mb-4">
+          <div class="card-header bg-white border-bottom">
+            <ul class="nav nav-tabs card-header-tabs" role="tablist">
+              <% editorConfig.tabs.forEach((tab) => { %>
+                <li class="nav-item">
+                  <a
+                    class="nav-link <%= activeTab === tab.key ? 'active' : '' %>"
+                    data-bs-toggle="tab"
+                    href="#<%= tab.key %>"
+                    role="tab"
+                    data-tab-key="<%= tab.key %>"
+                  >
+                    <i class="<%= tab.icon %> me-2"></i><%= tab.label %>
+                  </a>
+                </li>
+              <% }) %>
+            </ul>
+          </div>
+
+          <div class="card-body">
+            <div class="tab-content">
+              <% editorConfig.tabs.forEach((tab) => { %>
+                <%- include("partials/tab-pane", { tab, activeTab }) %>
+              <% }) %>
+            </div>
+          </div>
+        </div>
+
+        <div class="fixed-bottom-buttons">
+          <button type="reset" class="btn btn-secondary">
+            <i class="fas fa-undo"></i>
+            <span>Reset</span>
+          </button>
+          <button type="submit" class="btn btn-primary">
+            <i class="fas fa-save"></i>
+            <span>Save Changes</span>
+          </button>
+        </div>
+      </form>
+    </div>
+  </div>
+</div>
+
+<script>
+  window.pageEditorConfig = <%- JSON.stringify(editorConfig) %>;
+  window.pageEditorData = <%- JSON.stringify(data) %>;
+  window.pageEditorBackendUrl = <%- JSON.stringify(backendUrl) %>;
+</script>
+<script src="/js/page-content-editor.js"></script>

views/admin/pageContent/partials/tab-pane.ejs

@@ -0,0 +1,12 @@
+<div class="tab-pane fade <%= activeTab === tab.key ? 'show active' : '' %>" id="<%= tab.key %>" role="tabpanel">
+  <div class="card border shadow-sm">
+    <div class="card-header bg-white">
+      <h6 class="mb-0">
+        <i class="<%= tab.icon %> me-2"></i><%= tab.label %>
+      </h6>
+    </div>
+    <div class="card-body p-4">
+      <div class="page-editor-section" data-section-key="<%= tab.key %>"></div>
+    </div>
+  </div>
+</div>