feat: add ProjectSource JS extension with label title sync

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/project_source.js

@@ -0,0 +1,41 @@
+import { app } from "../../scripts/app.js";
+
+app.registerExtension({
+    name: "json.manager.project.source",
+
+    async beforeRegisterNodeDef(nodeType, nodeData, app) {
+        if (nodeData.name !== "ProjectSource") return;
+
+        const origOnNodeCreated = nodeType.prototype.onNodeCreated;
+        nodeType.prototype.onNodeCreated = function () {
+            origOnNodeCreated?.apply(this, arguments);
+
+            // Update title when label changes
+            const labelWidget = this.widgets?.find(w => w.name === "label");
+            if (labelWidget) {
+                const node = this;
+                const origCallback = labelWidget.callback;
+                labelWidget.callback = function (...args) {
+                    origCallback?.apply(this, args);
+                    node.title = labelWidget.value
+                        ? `Source: ${labelWidget.value}`
+                        : "Project Source";
+                    app.graph?.setDirtyCanvas(true, true);
+                };
+                // Set initial title
+                if (labelWidget.value) {
+                    this.title = `Source: ${labelWidget.value}`;
+                }
+            }
+        };
+
+        const origOnConfigure = nodeType.prototype.onConfigure;
+        nodeType.prototype.onConfigure = function (info) {
+            origOnConfigure?.apply(this, arguments);
+            const labelWidget = this.widgets?.find(w => w.name === "label");
+            if (labelWidget?.value) {
+                this.title = `Source: ${labelWidget.value}`;
+            }
+        };
+    },
+});