feat: add timestamp and forking

app/composables/useAgents.ts

@@ -198,11 +198,43 @@ export const useAgents = async () => {
         });
     }
 
+    const forkTopic = async (topicId: string, messageId: string): Promise<string | null> => {
+        try {
+            const result = await $fetch<{ ok: boolean; topicId: string; name: string }>(`/api/topic/${topicId}/fork`, {
+                method: 'POST',
+                body: { messageId },
+            });
+
+            if (result.ok) {
+                const agent = agents.value.find(a => a.topics.some(t => t.id === topicId));
+                if (agent) {
+                    const newTopic: Topic = {
+                        id: result.topicId,
+                        name: result.name,
+                        agentId: agent.id,
+                        userId: agent.userId,
+                        renaming: false,
+                        createdAt: new Date(),
+                    };
+                    agents.value = agents.value.map(a =>
+                        a.id === agent.id ? { ...a, topics: [newTopic, ...a.topics] } as AgentWithTopics : a
+                    );
+                }
+                return result.topicId;
+            }
+            return null;
+        } catch (error) {
+            console.error('Failed to fork topic:', error);
+            return null;
+        }
+    };
+
     return {
         agents,
         refresh,
         createAgent,
         createTopic,
+        forkTopic,
         getAgent,
         patchAgentLocally,
         patchTopicLocally,