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

frontend/src/adapters/agent.ts

@@ -28,6 +28,8 @@ import type {
 import type {
   AgentChatHandle,
   AgentGateway,
+  ChatDraftScope,
+  ChatDraftSnapshot,
   ConversationDetails,
   CreateAgentInput,
   LiveAgent,
@@ -297,6 +299,24 @@ export class TauriAgentGateway implements AgentGateway {
     });
   }
 
+  readChatDraft(scope: ChatDraftScope): Promise<ChatDraftSnapshot> {
+    return invoke<ChatDraftSnapshot>("read_chat_draft", {
+      request: scope,
+    });
+  }
+
+  async saveChatDraft(scope: ChatDraftScope, text: string): Promise<void> {
+    await invoke("save_chat_draft", {
+      request: { ...scope, text },
+    });
+  }
+
+  async clearChatDraft(scope: ChatDraftScope): Promise<void> {
+    await invoke("clear_chat_draft", {
+      request: scope,
+    });
+  }
+
   async closeAgentChat(sessionId: string): Promise<void> {
     await invoke("close_agent_session", { sessionId });
   }