feat(text): set up license key for development

apps/client/.env.development

@@ -0,0 +1,4 @@
+# The development license key for premium CKEditor features.
+# Note: This key is for development purposes only and should not be used in production.
+# Expires on: 2025-09-13
+VITE_CKEDITOR_KEY=eyJhbGciOiJFUzI1NiJ9.eyJleHAiOjE3NTc3MjE1OTksImp0aSI6IjRmMjdkYmYxLTcwOTEtNDYwZi04ZDZmLTc0NzBiZjQwNjg2MCIsImRpc3RyaWJ1dGlvbkNoYW5uZWwiOlsic2giLCJkcnVwYWwiXSwid2hpdGVMYWJlbCI6dHJ1ZSwibGljZW5zZVR5cGUiOiJkZXZlbG9wbWVudCIsImZlYXR1cmVzIjpbIkRSVVAiLCJDTVQiLCJETyIsIkZQIiwiU0MiLCJUT0MiLCJUUEwiLCJQT0UiLCJDQyIsIk1GIiwiU0VFIiwiRUNIIiwiRUlTIl0sInZjIjoiMjMxYzMwNTEifQ.9Ct5lIKbioC3dM8EFatDTmimEIVOdItE3Uh_ICHlS_A_8ueqIfkZpsN3L4_EqprvteNki9yqbuZVGpZTaQ51xg

apps/client/src/vite-env.d.ts

@@ -0,0 +1,14 @@
+/// <reference types="vite/client" />
+
+interface ViteTypeOptions {
+  strictImportMetaEnv: unknown
+}
+
+interface ImportMetaEnv {
+    /** The license key for CKEditor premium features. */
+    readonly VITE_CKEDITOR_KEY?: string;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}

apps/client/src/widgets/type_widgets/editable_text.ts

@@ -203,7 +203,7 @@ export default class EditableTextTypeWidget extends AbstractTextTypeWidget {
                     classes: true,
                     attributes: true
                 },
-                licenseKey: "GPL"
+                licenseKey: getLicenseKey()
             };
 
             const contentLanguage = this.note?.getLabelValue("language");
@@ -640,3 +640,13 @@ export default class EditableTextTypeWidget extends AbstractTextTypeWidget {
     }
 
 }
+
+function getLicenseKey() {
+    const premiumLicenseKey = import.meta.env.VITE_CKEDITOR_KEY;
+    if (!premiumLicenseKey) {
+        logError("CKEditor license key is not set, premium features will not be available.");
+        return "GPL";
+    }
+
+    return premiumLicenseKey;
+}