fix(quick-001): fix type signatures and store aggregation for multi-image dynamicInputs

- Update dynamicInputs type from Record<string, string> to Record<string, string | string[]> in 4 locations
- Fix getConnectedInputs to aggregate same-key values into arrays instead of overwriting
- Fix dynamicInputs.prompt access to handle array case
- Fix hasPrompt check in POST handler to handle array-typed prompt
- Update processedDynamicInputs type in both Replicate and fal blocks

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/api/generate/route.ts

@@ -33,7 +33,7 @@ interface MultiProviderGenerateRequest extends GenerateRequest {
   selectedModel?: SelectedModel;
   parameters?: Record<string, unknown>;
   /** Dynamic inputs from schema-based connections (e.g., image_url, tail_image_url, prompt) */
-  dynamicInputs?: Record<string, string>;
+  dynamicInputs?: Record<string, string | string[]>;
 }
 
 /**
@@ -1273,7 +1273,11 @@ export async function POST(request: NextRequest) {
     // - Provided via dynamicInputs
     // - Images are provided (image-to-video/image-to-image models)
     // - Dynamic inputs contain image frames (first_frame, last_frame, etc.)
-    const hasPrompt = prompt || (dynamicInputs && dynamicInputs.prompt);
+    const hasPrompt = prompt || (dynamicInputs && (
+      typeof dynamicInputs.prompt === 'string'
+        ? dynamicInputs.prompt
+        : Array.isArray(dynamicInputs.prompt) && dynamicInputs.prompt.length > 0
+    ));
     const hasImages = (images && images.length > 0);
     const hasImageInputs = dynamicInputs && Object.keys(dynamicInputs).some(key =>
       key.includes('frame') || key.includes('image')
@@ -1311,14 +1315,14 @@ export async function POST(request: NextRequest) {
       const processedImages: string[] = images ? [...images] : [];
 
       // Process dynamicInputs: filter empty values, keep Data URIs
-      let processedDynamicInputs: Record<string, string> | undefined = undefined;
+      let processedDynamicInputs: Record<string, string | string[]> | undefined = undefined;
 
       if (dynamicInputs) {
         processedDynamicInputs = {};
         for (const key of Object.keys(dynamicInputs)) {
           const value = dynamicInputs[key];
 
-          // Skip empty/null/undefined values
+          // Skip empty/null/undefined values (arrays pass through)
           if (value === null || value === undefined || value === '') {
             continue;
           }
@@ -1395,14 +1399,14 @@ export async function POST(request: NextRequest) {
       const processedImages: string[] = images ? [...images] : [];
 
       // Process dynamicInputs: filter empty values
-      let processedDynamicInputs: Record<string, string> | undefined = undefined;
+      let processedDynamicInputs: Record<string, string | string[]> | undefined = undefined;
 
       if (dynamicInputs) {
         processedDynamicInputs = {};
         for (const key of Object.keys(dynamicInputs)) {
           const value = dynamicInputs[key];
 
-          // Skip empty/null/undefined values
+          // Skip empty/null/undefined values (arrays pass through)
           if (value === null || value === undefined || value === '') {
             continue;
           }

src/lib/providers/types.ts

@@ -87,7 +87,7 @@ export interface GenerationInput {
   /** Model-specific parameters (varies by provider/model) */
   parameters?: Record<string, unknown>;
   /** Dynamic inputs mapped from schema (e.g., { "image_url": "data:...", "tail_image_url": "data:..." }) */
-  dynamicInputs?: Record<string, string>;
+  dynamicInputs?: Record<string, string | string[]>;
 }
 
 /**

src/store/workflowStore.ts

@@ -132,7 +132,7 @@ interface WorkflowStore {
 
   // Helpers
   getNodeById: (id: string) => WorkflowNode | undefined;
-  getConnectedInputs: (nodeId: string) => { images: string[]; videos: string[]; text: string | null; dynamicInputs: Record<string, string> };
+  getConnectedInputs: (nodeId: string) => { images: string[]; videos: string[]; text: string | null; dynamicInputs: Record<string, string | string[]> };
   validateWorkflow: () => { valid: boolean; errors: string[] };
 
   // Global Image History
@@ -745,7 +745,7 @@ export const useWorkflowStore = create<WorkflowStore>((set, get) => ({
     const images: string[] = [];
     const videos: string[] = [];
     let text: string | null = null;
-    const dynamicInputs: Record<string, string> = {};
+    const dynamicInputs: Record<string, string | string[]> = {};
 
     // Get the target node to check for inputSchema
     const targetNode = nodes.find((n) => n.id === nodeId);
@@ -825,7 +825,15 @@ export const useWorkflowStore = create<WorkflowStore>((set, get) => ({
         // Map normalized handle ID to schema name for dynamicInputs
         // This allows API to receive schema-specific parameter names
         if (handleId && handleToSchemaName[handleId]) {
-          dynamicInputs[handleToSchemaName[handleId]] = value;
+          const schemaName = handleToSchemaName[handleId];
+          const existing = dynamicInputs[schemaName];
+          if (existing !== undefined) {
+            dynamicInputs[schemaName] = Array.isArray(existing)
+              ? [...existing, value]
+              : [existing, value];
+          } else {
+            dynamicInputs[schemaName] = value;
+          }
         }
 
         // Route to typed arrays based on source output type
@@ -1051,7 +1059,10 @@ export const useWorkflowStore = create<WorkflowStore>((set, get) => ({
             const { images, text, dynamicInputs } = getConnectedInputs(node.id);
 
             // For dynamic inputs, check if we have at least a prompt
-            const promptText = text || dynamicInputs.prompt || null;
+            const promptFromDynamic = Array.isArray(dynamicInputs.prompt)
+              ? dynamicInputs.prompt[0]
+              : dynamicInputs.prompt;
+            const promptText = text || promptFromDynamic || null;
             if (!promptText) {
               logger.error('node.error', 'nanoBanana node missing text input', {
                 nodeId: node.id,