Admin Panel/Settings/Layout, for PWA: Custom head meta, link, icons, assetlinks.json, site.webmanifest.

Thanks to xet7 !

server/lib/customHeadRender.js

@@ -0,0 +1,54 @@
+import { WebApp } from 'meteor/webapp';
+import { WebAppInternals } from 'meteor/webapp';
+import Settings from '/models/settings';
+
+Meteor.startup(() => {
+  // Use Meteor's official API to modify the HTML boilerplate
+  WebAppInternals.registerBoilerplateDataCallback('wekan-custom-head', (request, data) => {
+    try {
+      const setting = Settings.findOne();
+
+      // Initialize head array if it doesn't exist
+      if (!data.head) {
+        data.head = '';
+      }
+
+      // Always set title tag based on productName
+      const productName = (setting && setting.productName) ? setting.productName : 'Wekan';
+      data.head += `\n  <title>${productName}</title>\n`;
+
+      // Only add custom head tags if enabled
+      if (!setting || !setting.customHeadEnabled) {
+        return data;
+      }
+
+      let injection = '';
+      // Add custom link tags (except manifest if custom manifest is enabled)
+      if (setting.customHeadLinkTags && setting.customHeadLinkTags.trim()) {
+        let linkTags = setting.customHeadLinkTags;
+        if (setting.customManifestEnabled) {
+          // Remove any manifest links from custom link tags to avoid duplicates
+          linkTags = linkTags.replace(/<link[^>]*rel=["\']?manifest["\']?[^>]*>/gi, '');
+        }
+        if (linkTags.trim()) {
+          injection += linkTags + '\n';
+        }
+      }
+
+      // Add manifest link if custom manifest is enabled
+      if (setting.customManifestEnabled) {
+        injection += '  <link rel="manifest" href="/site.webmanifest" crossorigin="use-credentials">\n';
+      }
+
+      if (injection.trim()) {
+        // Append custom head content to the existing head
+        data.head += injection;
+      }
+
+      return data;
+    } catch (e) {
+      console.error('[Custom Head] Error in boilerplate callback:', e.message, e.stack);
+      return data;
+    }
+  });
+});