fix(images): stop auto-assigning prompt to negative prompt nodes, expose seed and extra_params via API

- Don't auto-assign node_ids for ambiguous text/prompt/positive keys in workflow auto-detection so admins control which CLIPTextEncode nodes receive the prompt vs negative prompt
- Restore editable key input fields for workflow nodes
- Add seed field to CreateImageForm and pass it through to ComfyUI payload
- Add extra_params dict to allow API callers to set arbitrary workflow parameters (e.g. cfg, sampler_name, scheduler, denoise)

backend/open_webui/routers/images.py

@@ -455,6 +455,8 @@ class CreateImageForm(BaseModel):
     n: int = 1
     steps: int | None = None
     negative_prompt: str | None = None
+    seed: int | None = None
+    extra_params: dict | None = None
 
 
 GenerateImageForm = CreateImageForm  # Alias for backward compatibility
@@ -749,6 +751,12 @@ async def image_generations(
             if form_data.negative_prompt is not None:
                 data['negative_prompt'] = form_data.negative_prompt
 
+            if form_data.seed is not None:
+                data['seed'] = form_data.seed
+
+            if form_data.extra_params:
+                data['extra_params'] = form_data.extra_params
+
             form_data = ComfyUICreateImageForm(
                 **{
                     'workflow': ComfyUIWorkflow(

backend/open_webui/utils/images/comfyui.py

@@ -152,6 +152,7 @@ class ComfyUICreateImageForm(BaseModel):
 
     steps: Optional[int] = None
     seed: Optional[int] = None
+    extra_params: Optional[dict] = None
 
 
 def _apply_workflow_nodes(workflow, nodes, model, payload):
@@ -240,6 +241,9 @@ def _apply_workflow_nodes(workflow, nodes, model, payload):
                 elif node.value is not None:
                     # Custom static override
                     workflow[node_id]['inputs'][node_key] = node.value
+                elif hasattr(payload, 'extra_params') and payload.extra_params and node_key in payload.extra_params:
+                    # API-provided dynamic override
+                    workflow[node_id]['inputs'][node_key] = payload.extra_params[node_key]
 
         # --- Generic static value passthrough --------------------------------
         else:

src/lib/components/admin/Settings/Images.svelte

@@ -104,10 +104,17 @@
 					);
 
 					if (!nodeGroups.has(entryKey)) {
+						// Keys that map to payload.prompt in _apply_workflow_nodes are ambiguous
+						// when multiple nodes share the same key (e.g. positive vs negative
+						// CLIPTextEncode both have key 'text'). Leave node_ids empty for
+						// these so the admin explicitly picks which nodes receive the prompt.
+						const ambiguousKeys = new Set(['text', 'prompt', 'positive']);
+						const autoAssign = !ambiguousKeys.has(inputKey);
+
 						nodeGroups.set(entryKey, {
 							type: semanticType,
 							key: inputKey,
-							node_ids: [nodeId],
+							node_ids: autoAssign ? [nodeId] : [],
 							class_type: node.class_type
 						});
 					}
@@ -255,10 +262,14 @@
 					const semanticType = `${node.class_type}::${inputKey}`;
 
 					if (!nodeGroups.has(entryKey)) {
+						// Same ambiguous-key logic as parseAndPopulateWorkflowNodes
+						const ambiguousKeys = new Set(['text', 'prompt', 'positive']);
+						const autoAssign = !ambiguousKeys.has(inputKey);
+
 						nodeGroups.set(entryKey, {
 							type: semanticType,
 							key: inputKey,
-							node_ids: [nodeId],
+							node_ids: autoAssign ? [nodeId] : [],
 							class_type: node.class_type
 						});
 					}
@@ -810,16 +821,27 @@
 											<div class="flex w-full flex-col">
 												<div class="shrink-0">
 													<div
-														class="line-clamp-1 text-gray-400 dark:text-gray-500"
+														class="capitalize line-clamp-1 w-20 text-gray-400 dark:text-gray-500"
 														title={node.type}
 													>
-														<span class="font-medium">{node.class_type}</span><span
-															class="opacity-60">::{node.key}</span
-														>
+														{node.class_type}
 													</div>
 												</div>
 
 												<div class="mt-0.5 flex items-center">
+													<div class="">
+														<Tooltip content={$i18n.t('Input Key (e.g. text, unet_name, steps)')}>
+															<input
+																class="{inputClass} w-24"
+																placeholder={$i18n.t('Key')}
+																bind:value={node.key}
+																required
+															/>
+														</Tooltip>
+													</div>
+
+													<div class="px-2 text-gray-400 dark:text-gray-500">:</div>
+
 													<div class="w-full">
 														<Tooltip
 															content={$i18n.t('Comma separated Node Ids (e.g. 1 or 1,2)')}
@@ -1113,16 +1135,27 @@
 											<div class="flex w-full flex-col">
 												<div class="shrink-0">
 													<div
-														class="line-clamp-1 text-gray-400 dark:text-gray-500"
+														class="capitalize line-clamp-1 w-20 text-gray-400 dark:text-gray-500"
 														title={node.type}
 													>
-														<span class="font-medium">{node.class_type}</span><span
-															class="opacity-60">::{node.key}</span
-														>
+														{node.class_type}
 													</div>
 												</div>
 
 												<div class="mt-0.5 flex items-center">
+													<div class="">
+														<Tooltip content={$i18n.t('Input Key (e.g. text, unet_name, steps)')}>
+															<input
+																class="{inputClass} w-24"
+																placeholder={$i18n.t('Key')}
+																bind:value={node.key}
+																required
+															/>
+														</Tooltip>
+													</div>
+
+													<div class="px-2 text-gray-400 dark:text-gray-500">:</div>
+
 													<div class="w-full">
 														<Tooltip
 															content={$i18n.t('Comma separated Node Ids (e.g. 1 or 1,2)')}