feat: add route and menu support for axis title font

lib/node_modules/@stdlib/plot/base/view/lib/browser/app/editor/config/axis.js

@@ -28,6 +28,7 @@ var resolveTextValue = require( './resolve_text_value.js' );
 // VARIABLES //
 
 var PROPS = [
+	'titleFont',
 	'titleOpacity'
 ];
 var TEXT_PROPS = [

lib/node_modules/@stdlib/plot/base/view/lib/browser/app/schema/transforms/axis.js

@@ -30,6 +30,7 @@ var signalName = require( './../../utils/signal_name.js' );
 
 var PROPS = [
 	'title',
+	'titleFont',
 	'titleOpacity'
 ];
 

lib/node_modules/@stdlib/plot/base/view/lib/browser/routes/config/axes/title-font/index.js

@@ -0,0 +1,43 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var schema = require( './schema.json' );
+var handler = require( './main.js' );
+
+
+// MAIN //
+
+/**
+* Defines a route handler for receiving updating a plot configuration.
+*
+* @private
+* @returns {Object} route declaration
+*/
+function route() {
+	schema.handler = handler;
+	return schema;
+}
+
+
+// EXPORTS //
+
+module.exports = route;

lib/node_modules/@stdlib/plot/base/view/lib/browser/routes/config/axes/title-font/main.js

@@ -0,0 +1,57 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var middleware = require( './../../../../middleware_sequence.js' );
+var allowCredentials = require( './../../../../middleware/allow-credentials' );
+var tryAssign = require( './../../../../middleware/plot-try-assign' );
+var body = require( './../../../../middleware/body' );
+var ok = require( './../../../../middleware/ok' );
+var onError = require( './../../../../middleware/error' );
+
+
+// VARIABLES //
+
+var steps = [
+	allowCredentials,
+	body,
+	tryAssign( [ 'config', 'axes', ':axis' ], 'titleFont' ),
+	ok
+];
+
+
+// MAIN //
+
+/**
+* Request handler for updating a plot configuration.
+*
+* @private
+* @name handler
+* @type {Function}
+* @param {Object} request - request object
+* @param {Object} response - response object
+*/
+var handler = middleware( steps, onError );
+
+
+// EXPORTS //
+
+module.exports = handler;

lib/node_modules/@stdlib/plot/base/view/lib/browser/routes/config/axes/title-font/schema.json

@@ -0,0 +1,40 @@
+{
+  "method": "POST",
+  "url": "/config/axes/:axis/titleFont",
+  "schema": {
+    "response": {
+      "200": {
+        "type": "string"
+      },
+      "400": {
+        "type": "object",
+        "properties": {
+          "statusCode": {
+            "type": "integer"
+          },
+          "error": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      },
+      "413": {
+        "type": "object",
+        "properties": {
+          "statusCode": {
+            "type": "integer"
+          },
+          "error": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  },
+  "handler": null
+}

lib/node_modules/@stdlib/plot/base/view/lib/browser/routes/index.js

@@ -47,6 +47,7 @@ var axesOrient = require( './config/axes/orient' );
 var axesTickColor = require( './config/axes/tick-color' );
 var axesTitle = require( './config/axes/title' );
 var axesTitleColor = require( './config/axes/title-color' );
+var axesTitleFont = require( './config/axes/title-font' );
 var axesTitleOpacity = require( './config/axes/title-opacity' );
 var background = require( './config/background' );
 var description = require( './config/description' );
@@ -129,6 +130,7 @@ function register( router ) {
 	router.route( axesTickColor() );              // /config/axes/:axis/tickColor
 	router.route( axesTitle() );                  // /config/axes/:axis/title
 	router.route( axesTitleColor() );             // /config/axes/:axis/titleColor
+	router.route( axesTitleFont() );              // /config/axes/:axis/titleFont
 	router.route( axesTitleOpacity() );           // /config/axes/:axis/titleOpacity
 
 	router.route( background() );                 // /config/background

lib/node_modules/@stdlib/plot/vega/editor-config/axis/lib/main.js

@@ -37,6 +37,12 @@ function config() {
 			'default': '',
 			'type': 'string'
 		},
+		'titleFont': {
+			'description': 'font of the title',
+			'property': 'titleFont',
+			'default': '',
+			'type': 'string'
+		},
 		'titleOpacity': {
 			'description': 'opacity of the title',
 			'property': 'titleOpacity',