Add custom nodes, Civitai loras (LFS), and vast.ai setup script

Includes 30 custom nodes committed directly, 7 Civitai-exclusive
loras stored via Git LFS, and a setup script that installs all
dependencies and downloads HuggingFace-hosted models on vast.ai.

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

custom_nodes/comfyui-custom-scripts/web/js/systemNotification.js

@@ -0,0 +1,47 @@
+import { app } from "../../../scripts/app.js";
+
+const notificationSetup = () => {
+	if (!("Notification" in window)) {
+		console.log("This browser does not support notifications.");
+		alert("This browser does not support notifications.");
+		return;
+	}
+	if (Notification.permission === "denied") {
+		console.log("Notifications are blocked. Please enable them in your browser settings.");
+		alert("Notifications are blocked. Please enable them in your browser settings.");
+		return;
+	}
+	if (Notification.permission !== "granted") {
+		Notification.requestPermission();
+	}
+	return true;
+};
+
+app.registerExtension({
+	name: "pysssss.SystemNotification",
+	async beforeRegisterNodeDef(nodeType, nodeData, app) {
+		if (nodeData.name === "SystemNotification|pysssss") {
+			const onExecuted = nodeType.prototype.onExecuted;
+			nodeType.prototype.onExecuted = async function ({ message, mode }) {
+				onExecuted?.apply(this, arguments);
+
+				if (mode === "on empty queue") {
+					if (app.ui.lastQueueSize !== 0) {
+						await new Promise((r) => setTimeout(r, 500));
+					}
+					if (app.ui.lastQueueSize !== 0) {
+						return;
+					}
+				}
+				if (!notificationSetup()) return;
+				const notification = new Notification("ComfyUI", { body: message ?? "Your notification has triggered." });
+			};
+
+			const onNodeCreated = nodeType.prototype.onNodeCreated;
+			nodeType.prototype.onNodeCreated = function () {
+				onNodeCreated?.apply(this, arguments);
+				notificationSetup();
+			};
+		}
+	},
+});