fix: add hardcoded Veo video parameters to GenerateVideoNode

Veo models (veo-3.1, veo-3.1-fast) showed no user-configurable
parameters in the UI. Follows the established pattern from
GenerateImageNode where Gemini model parameters are hardcoded in the
component rather than fetched via the schema API. Adds aspect ratio,
duration, resolution, negative prompt, and seed controls.

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

src/components/nodes/GenerateVideoNode.tsx

@@ -18,6 +18,17 @@ import { useVideoBlobUrl } from "@/hooks/useVideoBlobUrl";
 // Video generation capabilities
 const VIDEO_CAPABILITIES: ModelCapability[] = ["text-to-video", "image-to-video"];
 
+// Hardcoded Veo parameter options (matches getGeminiVideoSchema in models/[modelId]/route.ts)
+const VEO_ASPECT_RATIOS = ["16:9", "9:16"] as const;
+const VEO_DURATIONS = ["4", "6", "8"] as const;
+const VEO_RESOLUTIONS = ["720p", "1080p", "4k"] as const;
+
+/** Returns true for Gemini-native Veo video models */
+function isVeoModel(modelId: string | undefined): boolean {
+  if (!modelId) return false;
+  return modelId.startsWith("veo-");
+}
+
 type GenerateVideoNodeType = Node<GenerateVideoNodeData, "generateVideo">;
 
 export function GenerateVideoNode({ id, data, selected }: NodeProps<GenerateVideoNodeType>) {
@@ -34,7 +45,6 @@ export function GenerateVideoNode({ id, data, selected }: NodeProps<GenerateVide
   const [isLoadingCarouselVideo, setIsLoadingCarouselVideo] = useState(false);
   const videoBlobUrl = useVideoBlobUrl(nodeData.outputVideo ?? null);
 
-  // Get the current selected provider (default to fal since Gemini doesn't do video)
   const currentProvider: ProviderType = nodeData.selectedModel?.provider || "fal";
 
   // Get enabled providers
@@ -149,6 +159,22 @@ export function GenerateVideoNode({ id, data, selected }: NodeProps<GenerateVide
     [id, updateNodeData]
   );
 
+  // Update a single key in the parameters bag (used by hardcoded Veo controls)
+  const updateVeoParam = useCallback(
+    (key: string, value: unknown) => {
+      const current = nodeData.parameters || {};
+      // Remove the key if value is empty string (clear optional fields)
+      if (value === "") {
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        const { [key]: _, ...rest } = current;
+        updateNodeData(id, { parameters: rest });
+      } else {
+        updateNodeData(id, { parameters: { ...current, [key]: value } });
+      }
+    },
+    [id, nodeData.parameters, updateNodeData]
+  );
+
   // Handle inputs loaded from schema
   const handleInputsLoaded = useCallback(
     (inputs: ModelInputDef[]) => {
@@ -717,7 +743,58 @@ export function GenerateVideoNode({ id, data, selected }: NodeProps<GenerateVide
         )}
 
         {/* Model-specific parameters */}
-        {nodeData.selectedModel?.modelId && (
+        {nodeData.selectedModel?.modelId && isVeoModel(nodeData.selectedModel.modelId) ? (
+          // Hardcoded Veo parameters (matching GenerateImageNode pattern for Gemini models)
+          <div className="flex flex-col gap-1.5 shrink-0">
+            {/* Aspect ratio + Duration row */}
+            <div className="flex gap-1.5">
+              <select
+                value={(nodeData.parameters?.aspectRatio as string) || "16:9"}
+                onChange={(e) => updateVeoParam("aspectRatio", e.target.value)}
+                className="flex-1 text-[10px] py-1 px-1.5 border border-neutral-700 rounded bg-neutral-900/50 focus:outline-none focus:ring-1 focus:ring-neutral-600 text-neutral-300"
+              >
+                {VEO_ASPECT_RATIOS.map((r) => (
+                  <option key={r} value={r}>{r}</option>
+                ))}
+              </select>
+              <select
+                value={(nodeData.parameters?.durationSeconds as string) || "8"}
+                onChange={(e) => updateVeoParam("durationSeconds", e.target.value)}
+                className="w-12 text-[10px] py-1 px-1.5 border border-neutral-700 rounded bg-neutral-900/50 focus:outline-none focus:ring-1 focus:ring-neutral-600 text-neutral-300"
+              >
+                {VEO_DURATIONS.map((d) => (
+                  <option key={d} value={d}>{d}s</option>
+                ))}
+              </select>
+              <select
+                value={(nodeData.parameters?.resolution as string) || "720p"}
+                onChange={(e) => updateVeoParam("resolution", e.target.value)}
+                className="w-14 text-[10px] py-1 px-1.5 border border-neutral-700 rounded bg-neutral-900/50 focus:outline-none focus:ring-1 focus:ring-neutral-600 text-neutral-300"
+              >
+                {VEO_RESOLUTIONS.map((r) => (
+                  <option key={r} value={r}>{r}</option>
+                ))}
+              </select>
+            </div>
+            {/* Negative prompt */}
+            <input
+              type="text"
+              placeholder="Negative prompt..."
+              value={(nodeData.parameters?.negativePrompt as string) || ""}
+              onChange={(e) => updateVeoParam("negativePrompt", e.target.value)}
+              className="w-full text-[10px] py-1 px-1.5 border border-neutral-700 rounded bg-neutral-900/50 focus:outline-none focus:ring-1 focus:ring-neutral-600 text-neutral-300 placeholder:text-neutral-600"
+            />
+            {/* Seed */}
+            <input
+              type="number"
+              placeholder="Seed (optional)"
+              value={(nodeData.parameters?.seed as string) ?? ""}
+              onChange={(e) => updateVeoParam("seed", e.target.value === "" ? "" : Number(e.target.value))}
+              min={0}
+              className="w-full text-[10px] py-1 px-1.5 border border-neutral-700 rounded bg-neutral-900/50 focus:outline-none focus:ring-1 focus:ring-neutral-600 text-neutral-300 placeholder:text-neutral-600"
+            />
+          </div>
+        ) : nodeData.selectedModel?.modelId ? (
           <ModelParameters
             modelId={nodeData.selectedModel.modelId}
             provider={currentProvider}
@@ -726,7 +803,7 @@ export function GenerateVideoNode({ id, data, selected }: NodeProps<GenerateVide
             onExpandChange={handleParametersExpandChange}
             onInputsLoaded={handleInputsLoaded}
           />
-        )}
+        ) : null}
       </div>
     </BaseNode>