feat(chat): persistance bornee du brouillon custom chat par projet/layout (#182)

frontend/src/adapters/http/streamGateways.ts

@@ -41,6 +41,8 @@ import type {
 } from "@/domain";
 import type {
   AgentGateway,
+  ChatDraftScope,
+  ChatDraftSnapshot,
   ConversationDetails,
   CreateAgentInput,
   CreateTicketInput,
@@ -255,6 +257,18 @@ export class HttpAgentGateway implements AgentGateway {
     });
   }
 
+  readChatDraft(scope: ChatDraftScope): Promise<ChatDraftSnapshot> {
+    return this.http.invoke<ChatDraftSnapshot>("read_chat_draft", { request: scope });
+  }
+
+  async saveChatDraft(scope: ChatDraftScope, text: string): Promise<void> {
+    await this.http.invoke("save_chat_draft", { request: { ...scope, text } });
+  }
+
+  async clearChatDraft(scope: ChatDraftScope): Promise<void> {
+    await this.http.invoke("clear_chat_draft", { request: scope });
+  }
+
   async launchAgent(
     projectId: string,
     agentId: string,