feat(preview): disable Manager preview method when ComfyUI native feature is available

- Add detection for ComfyUI PR #11261 (per-queue preview override)
- Return DISABLED status when native feature is detected
- Improve UI loading state and prevent flash of enabled state
- Add accessibility attributes and visual feedback for disabled state
- Show user notification when feature transitions to native
- Version bump to 3.39

glob/manager_core.py

@@ -44,7 +44,7 @@ import manager_migration
 from node_package import InstalledNodePackage
 
 
-version_code = [3, 38, 3]
+version_code = [3, 39]
 version_str = f"V{version_code[0]}.{version_code[1]}" + (f'.{version_code[2]}' if len(version_code) > 2 else '')
 
 

glob/manager_server.py

@@ -38,6 +38,25 @@ SECURITY_MESSAGE_NORMAL_MINUS_MODEL = "ERROR: Downloading models that are not in
 
 routes = PromptServer.instance.routes
 
+
+def has_per_queue_preview():
+    """
+    Check if ComfyUI PR #11261 (per-queue live preview override) is merged
+
+    Returns:
+        bool: True if ComfyUI has per-queue preview feature
+    """
+    try:
+        import latent_preview
+        return hasattr(latent_preview, 'set_preview_method')
+    except ImportError:
+        return False
+
+
+# Detect ComfyUI per-queue preview override feature (PR #11261)
+COMFYUI_HAS_PER_QUEUE_PREVIEW = has_per_queue_preview()
+
+
 def handle_stream(stream, prefix):
     stream.reconfigure(encoding=locale.getpreferredencoding(), errors='replace')
     for msg in stream:
@@ -182,10 +201,19 @@ def set_preview_method(method):
     core.get_config()['preview_method'] = method
 
 
-if args.preview_method == latent_preview.LatentPreviewMethod.NoPreviews:
+if COMFYUI_HAS_PER_QUEUE_PREVIEW:
+    logging.info(
+        "[ComfyUI-Manager] ComfyUI per-queue preview override detected (PR #11261). "
+        "Manager's preview method feature is disabled. "
+        "Use ComfyUI's --preview-method CLI option or 'Settings > Execution > Live preview method'."
+    )
+elif args.preview_method == latent_preview.LatentPreviewMethod.NoPreviews:
     set_preview_method(core.get_config()['preview_method'])
 else:
-    logging.warning("[ComfyUI-Manager] Since --preview-method is set, ComfyUI-Manager's preview method feature will be ignored.")
+    logging.warning(
+        "[ComfyUI-Manager] Since --preview-method is set, "
+        "ComfyUI-Manager's preview method feature will be ignored."
+    )
 
 
 def set_component_policy(mode):
@@ -1482,14 +1510,26 @@ async def install_model(request):
 
 @routes.get("/manager/preview_method")
 async def preview_method(request):
+    # Setting change request
     if "value" in request.rel_url.query:
+        # Reject setting change if per-queue preview feature is available
+        if COMFYUI_HAS_PER_QUEUE_PREVIEW:
+            return web.Response(text="DISABLED", status=403)
+
+        # Process normally if not available
         set_preview_method(request.rel_url.query['value'])
         core.write_config()
-    else:
-        return web.Response(text=core.manager_funcs.get_current_preview_method(), status=200)
-
         return web.Response(status=200)
 
+    # Status query request
+    else:
+        # Return DISABLED if per-queue preview feature is available
+        if COMFYUI_HAS_PER_QUEUE_PREVIEW:
+            return web.Response(text="DISABLED", status=200)
+
+        # Return current value if not available
+        return web.Response(text=core.manager_funcs.get_current_preview_method(), status=200)
+
 
 @routes.get("/manager/db_mode")
 async def db_mode(request):

js/comfyui-manager.js

@@ -976,17 +976,96 @@ class ManagerMenuDialog extends ComfyDialog {
 		let preview_combo = document.createElement("select");
 		preview_combo.setAttribute("title", "Configure how latent variables will be decoded during preview in the sampling process.");
 		preview_combo.className = "cm-menu-combo p-select p-component p-inputwrapper p-inputwrapper-filled";
+
+		// Loading state to prevent flash of enabled state
+		preview_combo.appendChild($el('option', { value: '', text: 'Loading...', disabled: true }, []));
 		preview_combo.appendChild($el('option', { value: 'auto', text: 'Auto' }, []));
 		preview_combo.appendChild($el('option', { value: 'taesd', text: 'TAESD (slow)' }, []));
 		preview_combo.appendChild($el('option', { value: 'latent2rgb', text: 'Latent2RGB (fast)' }, []));
 		preview_combo.appendChild($el('option', { value: 'none', text: 'None (very fast)' }, []));
 
+		// Start disabled to prevent flash
+		preview_combo.disabled = true;
+		preview_combo.value = '';
+
+		// Fetch current state
 		api.fetchApi('/manager/preview_method')
 			.then(response => response.text())
-			.then(data => { preview_combo.value = data; });
+			.then(data => {
+				// Remove loading option
+				preview_combo.querySelector('option[value=""]')?.remove();
+
+				if (data === "DISABLED") {
+					// ComfyUI per-queue preview feature is active
+					preview_combo.disabled = true;
+					preview_combo.value = 'auto';
+
+					// Accessibility attributes
+					preview_combo.setAttribute("aria-disabled", "true");
+					preview_combo.setAttribute("aria-label",
+						"Preview method setting (disabled - managed by ComfyUI). " +
+						"Use Settings > Execution > Live preview method instead."
+					);
+
+					// Tooltip for mouse users
+					preview_combo.setAttribute("title",
+						"This feature is now provided natively by ComfyUI. " +
+						"Please use 'Settings > Execution > Live preview method' instead."
+					);
+
+					// Visual feedback
+					preview_combo.style.opacity = '0.6';
+					preview_combo.style.cursor = 'not-allowed';
+				} else {
+					// Manager feature is active
+					preview_combo.disabled = false;
+					preview_combo.value = data;
+
+					// Accessibility for enabled state
+					preview_combo.setAttribute("aria-label",
+						"Preview method setting. Select how latent variables are decoded during preview."
+					);
+				}
+			})
+			.catch(error => {
+				console.error('[ComfyUI-Manager] Failed to fetch preview method status:', error);
+				// Error recovery: fallback to enabled
+				preview_combo.querySelector('option[value=""]')?.remove();
+				preview_combo.disabled = false;
+				preview_combo.value = 'auto';
+			});
 
 		preview_combo.addEventListener('change', function (event) {
-			api.fetchApi(`/manager/preview_method?value=${event.target.value}`);
+			// Ignore if disabled
+			if (preview_combo.disabled) {
+				event.preventDefault();
+				return;
+			}
+
+			// Normal operation
+			api.fetchApi(`/manager/preview_method?value=${event.target.value}`)
+				.then(response => {
+					if (response.status === 403) {
+						// Feature transitioned to native
+						alert(
+							'This feature is now provided natively by ComfyUI.\n' +
+							'Please use \'Settings > Execution > Live preview method\' instead.'
+						);
+						preview_combo.disabled = true;
+						preview_combo.style.opacity = '0.6';
+						preview_combo.style.cursor = 'not-allowed';
+
+						// Update aria attributes
+						preview_combo.setAttribute("aria-disabled", "true");
+						preview_combo.setAttribute("aria-label",
+							"Preview method setting (disabled - managed by ComfyUI). " +
+							"Use Settings > Execution > Live preview method instead."
+						);
+					}
+				})
+				.catch(error => {
+					console.error('[ComfyUI-Manager] Preview method update failed:', error);
+				});
 		});
 
 		const previewSetttingItem = createSettingsCombo("Preview method", preview_combo);

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "comfyui-manager"
 description = "ComfyUI-Manager provides features to install and manage custom nodes for ComfyUI, as well as various functionalities to assist with ComfyUI."
-version = "3.38.3"
+version = "3.39"
 license = { file = "LICENSE.txt" }
 dependencies = ["GitPython", "PyGithub", "matrix-nio", "transformers", "huggingface-hub>0.20", "typer", "rich", "typing-extensions", "toml", "uv", "chardet"]