feat(contact-button): add floating contact widget admin management

Add CMS support for floating contact widget with Facebook/Zalo quick
actions. Includes mongoose schema, admin UI tab, image upload with
sharp resize presets, deferred form submission with draft persistence,
and upload middleware error handling.

scripts/2026_04_07_110000_add_home_floating_contact.js

@@ -0,0 +1,115 @@
+require("dotenv").config();
+const connectDB = require("../config/database");
+
+const DEFAULT_FACEBOOK_URL = "https://www.facebook.com/hailearning.edu.vn/";
+const DEFAULT_PANEL_TITLE = "Anh chị cần tư vấn hay hỗ trợ gì thêm không ạ?";
+const DEFAULT_BRAND_IMAGE = "/assets/img/logo/black-logo.svg";
+const DEFAULT_FACEBOOK_ICON = "/uploads/home/floating-contact/Facebook_Logo_Primary.webp";
+const DEFAULT_ZALO_ICON = "/uploads/home/floating-contact/Icon_of_Zalo.svg.webp";
+
+function normalizePhoneForZalo(value = "") {
+  const digits = String(value).replace(/\D/g, "");
+
+  if (!digits) {
+    return "";
+  }
+
+  if (digits.startsWith("84")) {
+    return digits;
+  }
+
+  if (digits.startsWith("0")) {
+    return `84${digits.slice(1)}`;
+  }
+
+  return digits;
+}
+
+async function migrate() {
+  const mongoose = require("mongoose");
+  let ownConn = false;
+
+  try {
+    const wasConnected = mongoose.connection.readyState === 1;
+    await connectDB();
+    if (!wasConnected) {
+      ownConn = true;
+    }
+
+    const Home = require("../models/home");
+    const Footer = require("../models/footer");
+
+    const footer = await Footer.findOne().sort({ updatedAt: -1 }).lean();
+    const footerPhone = footer?.top?.phone?.href || footer?.top?.phone?.display || "";
+    const zaloPhone = normalizePhoneForZalo(footerPhone) || "84961834040";
+    const zaloUrl = `https://zalo.me/${zaloPhone}`;
+
+    const defaultFloatingContact = {
+      enabled: true,
+      position: "bottom-right",
+      panelTitle: DEFAULT_PANEL_TITLE,
+      brand: {
+        imageSrc: DEFAULT_BRAND_IMAGE,
+        imageAlt: "HAI Learning",
+      },
+      trigger: {
+        icon: "fa-comments",
+      },
+      actions: [
+        {
+          id: "facebook",
+          platform: "facebook",
+          enabled: true,
+          label: "Nhắn tin qua Facebook",
+          subtitle: "facebook.com/hailearning.edu.vn",
+          href: DEFAULT_FACEBOOK_URL,
+          iconImage: DEFAULT_FACEBOOK_ICON,
+          iconType: "iconClass",
+          iconClass: "fa-brands fa-facebook-messenger",
+          iconText: "",
+          order: 1,
+        },
+        {
+          id: "zalo",
+          platform: "zalo",
+          enabled: true,
+          label: "Nhắn tin qua Zalo",
+          subtitle: `zalo.me/${zaloPhone}`,
+          href: zaloUrl,
+          iconImage: DEFAULT_ZALO_ICON,
+          iconType: "iconText",
+          iconClass: "",
+          iconText: "Zalo",
+          order: 2,
+        },
+      ],
+    };
+
+    const updateResult = await Home.updateMany(
+      { floatingContact: { $exists: false } },
+      { $set: { floatingContact: defaultFloatingContact } },
+    );
+
+    if (updateResult.matchedCount === 0) {
+      await Home.create({ floatingContact: defaultFloatingContact });
+      console.log("Created a Home document with default floatingContact data.");
+    } else {
+      console.log(
+        `Updated ${updateResult.modifiedCount} Home document(s) with floatingContact defaults.`,
+      );
+    }
+
+    if (ownConn && mongoose.connection.readyState === 1) {
+      await mongoose.disconnect();
+    }
+    process.exit(0);
+  } catch (error) {
+    console.error("Failed to add floatingContact to Home:", error);
+    if (ownConn && mongoose.connection.readyState === 1) {
+      await mongoose.disconnect();
+    }
+    process.exit(1);
+  }
+}
+
+migrate();