Initial commit: AI chat assistant with workflow chat, workspace, and profile tabs

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

composables/useConversations.uts

@@ -0,0 +1,93 @@
+/**
+ * useConversations — Conversation CRUD and history list management
+ *
+ * Manages the full array of all conversations. Persisted to storage.
+ * Provides create, delete, update, and query operations.
+ */
+
+import type { Conversation, WorkflowId } from '@/types/index'
+import { STORAGE_KEYS, generateId } from '@/constants/index'
+import { useStorage } from './useStorage'
+
+export function useConversations() {
+  const { loadValue, saveValue } = useStorage()
+
+  // All conversations loaded from persistence
+  const conversations = ref<Conversation[]>(
+    loadValue<Conversation[]>(STORAGE_KEYS.CONVERSATIONS, [])
+  )
+
+  /**
+   * Persist the current conversations array to storage.
+   */
+  function persist(): void {
+    saveValue(STORAGE_KEYS.CONVERSATIONS, conversations.value)
+  }
+
+  /**
+   * Create a new empty conversation with the given workflow.
+   */
+  function createConversation(workflowId: WorkflowId, title?: string): Conversation {
+    const now = Date.now()
+    const conversation: Conversation = {
+      id: generateId(),
+      title: title ?? '新对话',
+      workflowId: workflowId,
+      messages: [],
+      createdAt: now,
+      updatedAt: now,
+    }
+    conversations.value.unshift(conversation)
+    persist()
+    return conversation
+  }
+
+  /**
+   * Delete a conversation by ID.
+   */
+  function deleteConversation(id: string): void {
+    conversations.value = conversations.value.filter((c) => c.id !== id)
+    persist()
+  }
+
+  /**
+   * Update a conversation's title.
+   */
+  function updateConversationTitle(id: string, title: string): void {
+    const conv = conversations.value.find((c) => c.id === id)
+    if (conv) {
+      conv.title = title
+      conv.updatedAt = Date.now()
+      persist()
+    }
+  }
+
+  /**
+   * Get a conversation by ID.
+   */
+  function getConversation(id: string): Conversation | undefined {
+    return conversations.value.find((c) => c.id === id)
+  }
+
+  /**
+   * Update a conversation's messages and timestamp.
+   * Used after adding/removing messages.
+   */
+  function saveConversation(conversation: Conversation): void {
+    const index = conversations.value.findIndex((c) => c.id === conversation.id)
+    if (index !== -1) {
+      conversations.value[index] = conversation
+      persist()
+    }
+  }
+
+  return {
+    conversations,
+    createConversation,
+    deleteConversation,
+    updateConversationTitle,
+    getConversation,
+    saveConversation,
+    persist,
+  }
+}