feat(数据库): 添加笔记表结构

- 新增 notes 表，存储用户笔记数据
- 支持标题、内容、标签等字段
- 关联对话和消息来源
- 添加置顶和归档状态

src/drizzle/migrations/0007_fantastic_molten_man.sql

@@ -0,0 +1,15 @@
+CREATE TABLE "notes" (
+	"id" serial PRIMARY KEY NOT NULL,
+	"note_id" varchar(64) NOT NULL,
+	"user_id" varchar(64) NOT NULL,
+	"conversation_id" varchar(64),
+	"message_id" varchar(64),
+	"title" varchar(255) NOT NULL,
+	"content" text NOT NULL,
+	"tags" jsonb DEFAULT '[]'::jsonb,
+	"is_pinned" boolean DEFAULT false,
+	"is_archived" boolean DEFAULT false,
+	"created_at" timestamp with time zone DEFAULT now(),
+	"updated_at" timestamp with time zone DEFAULT now(),
+	CONSTRAINT "notes_note_id_unique" UNIQUE("note_id")
+);

src/drizzle/migrations/meta/_journal.json

@@ -50,6 +50,13 @@
       "when": 1766206123948,
       "tag": "0006_safe_spitfire",
       "breakpoints": true
+    },
+    {
+      "idx": 7,
+      "version": "7",
+      "when": 1766299055211,
+      "tag": "0007_fantastic_molten_man",
+      "breakpoints": true
     }
   ]
 }

src/drizzle/schema.ts

@@ -262,6 +262,31 @@ export const models = pgTable('models', {
   updatedAt: timestamp('updated_at', { withTimezone: true }).defaultNow(),
 });
 
+// ============================================
+// 笔记表
+// ============================================
+export const notes = pgTable('notes', {
+  id: serial('id').primaryKey(),
+  // 笔记唯一标识
+  noteId: varchar('note_id', { length: 64 }).notNull().unique(),
+  // 关联用户
+  userId: varchar('user_id', { length: 64 }).notNull(),
+  // 来源信息
+  conversationId: varchar('conversation_id', { length: 64 }), // 来源对话
+  messageId: varchar('message_id', { length: 64 }),           // 来源消息
+  // 笔记内容
+  title: varchar('title', { length: 255 }).notNull(),         // 标题
+  content: text('content').notNull(),                          // 内容（Markdown）
+  // 分类和标签
+  tags: jsonb('tags').$type<string[]>().default([]),          // 标签数组
+  // 状态
+  isPinned: boolean('is_pinned').default(false),              // 置顶
+  isArchived: boolean('is_archived').default(false),          // 归档
+  // 时间戳
+  createdAt: timestamp('created_at', { withTimezone: true }).defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).defaultNow(),
+});
+
 // ============================================
 // 关系定义
 // ============================================
@@ -332,6 +357,22 @@ export const messagesRelations = relations(messages, ({ one }) => ({
   }),
 }));
 
+// 笔记关系
+export const notesRelations = relations(notes, ({ one }) => ({
+  user: one(users, {
+    fields: [notes.userId],
+    references: [users.userId],
+  }),
+  conversation: one(conversations, {
+    fields: [notes.conversationId],
+    references: [conversations.conversationId],
+  }),
+  message: one(messages, {
+    fields: [notes.messageId],
+    references: [messages.messageId],
+  }),
+}));
+
 // ============================================
 // 类型定义
 // ============================================
@@ -385,3 +426,6 @@ export type NewAssistant = typeof assistants.$inferInsert;
 
 export type UserFavoriteAssistant = typeof userFavoriteAssistants.$inferSelect;
 export type NewUserFavoriteAssistant = typeof userFavoriteAssistants.$inferInsert;
+
+export type Note = typeof notes.$inferSelect;
+export type NewNote = typeof notes.$inferInsert;