feat(core): add seed to fal (#6712)

packages/frontend/core/src/components/blocksuite/block-suite-editor/ai/copilot-client.ts

@@ -158,9 +158,14 @@ export class CopilotClient {
   }
 
   // Text or image to images
-  imagesStream(messageId: string, sessionId: string) {
+  imagesStream(messageId: string, sessionId: string, seed?: string) {
-    return new EventSource(
+    const url = new URL(
-      `${this.backendUrl}/api/copilot/chat/${sessionId}/images?messageId=${messageId}`
+      `${this.backendUrl}/api/copilot/chat/${sessionId}/images`
     );
+    url.searchParams.set('messageId', messageId);
+    if (seed) {
+      url.searchParams.set('seed', seed);
+    }
+    return new EventSource(url);
   }
 }

packages/frontend/core/src/components/blocksuite/block-suite-editor/ai/request.ts

@@ -31,6 +31,10 @@ export type TextToTextOptions = {
   signal?: AbortSignal;
 };
 
+export type ToImageOptions = TextToTextOptions & {
+  seed?: string;
+};
+
 export function createChatSession({
   workspaceId,
   docId,
@@ -175,8 +179,9 @@ export function toImage({
   content,
   attachments,
   params,
+  seed,
   timeout = TIMEOUT,
-}: TextToTextOptions) {
+}: ToImageOptions) {
   return {
     [Symbol.asyncIterator]: async function* () {
       const { messageId, sessionId } = await createSessionMessage({
@@ -188,7 +193,7 @@ export function toImage({
         params,
       });
 
-      const eventSource = client.imagesStream(messageId, sessionId);
+      const eventSource = client.imagesStream(messageId, sessionId, seed);
       for await (const event of toTextStream(eventSource, { timeout })) {
         if (event.type === 'attachment') {
           yield event.data;