feat: standardize admin form limits and guidance

controllers/pricingController.js

@@ -1,8 +1,19 @@
 const Pricing = require("../models/pricing");
+const {
+  validateLengthRules,
+  summarizeLengthErrors,
+} = require("../utils/lengthValidation");
+const {
+  PRICING_LENGTH_RULES,
+} = require("../constants/contentLengthRules");
 const writeAuditLog = require("../audit/writeAuditLog");
 const diffObject = require("../audit/diffObject");
 const AUDIT_ACTIONS = require("../constants/auditAction");
 
+const getLengthValidationMessage = (validation) =>
+  summarizeLengthErrors(validation, 3) ||
+  "One or more fields exceed the allowed length.";
+
 // ==================== CMS ADMIN FUNCTIONS ====================
 
 // Render admin page for pricing management
@@ -86,6 +97,20 @@ exports.update = async (req, res) => {
         ? JSON.parse(testimonials)
         : testimonials;
 
+    const validation = validateLengthRules(
+      {
+        hero: heroData,
+        pricingSection: pricingSectionData,
+        plans: plansData,
+        testimonials: testimonialsData,
+      },
+      PRICING_LENGTH_RULES,
+    );
+    if (!validation.valid) {
+      req.flash("error", getLengthValidationMessage(validation));
+      return res.redirect("/admin/pricing");
+    }
+
     let pricing = await Pricing.findOne({ name: "default" });
 
     // ✅ Capture BEFORE state