feat: 任务发布到企微客户群（企业群发）与资源库单条新增

- 任务中心新增「发布到企微群」：同步客户群清单（wecom_group_chats）、
  按群主分组创建企业群发任务（add_msg_template）、发送记录落库
  wecom_group_pushes，迁移 mysql/0009；lib/wecom-client.ts 补
  listCustomerGroupChats/createGroupMsgTemplate
- KOC 资源库支持单条新增：app/api/resources-insert + lib/resource-write，
  拆出资源写入公共逻辑供导入复用；0008 补合作方外部联系人字段
- 环境变量示例补企微凭证与 SEED_DEMO_DATA；next.config 增加
  allowedDevOrigins；CLAUDE.md 补充项目说明
- .gitignore 排除 .codegraph/ 与 .ipynb_checkpoints/

db/schema.ts

@@ -21,6 +21,7 @@ export const partners = mysqlTable("partners", {
   owner: varchar("owner", { length: 255 }).notNull().default("运营组"),
   claimedTotal: int("claimed_total").notNull().default(0),
   completedTotal: int("completed_total").notNull().default(0),
+  wecomExternalUserId: varchar("wecom_external_user_id", { length: 128 }),
   createdAt: timestamp("created_at"),
 });
 
@@ -252,6 +253,35 @@ export const mcpExportTokens = mysqlTable(
   (table) => [index("mcp_export_tokens_expires_at_idx").on(table.expiresAt)],
 );
 
+export const wecomGroupChats = mysqlTable(
+  "wecom_group_chats",
+  {
+    chatId: varchar("chat_id", { length: 128 }).primaryKey(),
+    name: varchar("name", { length: 512 }).notNull().default(""),
+    ownerUserId: varchar("owner_user_id", { length: 128 }).notNull(),
+    memberCount: int("member_count").notNull().default(0),
+    status: int("status").notNull().default(0),
+    syncedAt: timestamp("synced_at"),
+  },
+  (table) => [index("wecom_group_chats_owner_idx").on(table.ownerUserId)],
+);
+
+export const wecomGroupPushes = mysqlTable(
+  "wecom_group_pushes",
+  {
+    id: varchar("id", { length: 64 }).primaryKey(),
+    taskId: varchar("task_id", { length: 64 }).notNull(),
+    msgid: varchar("msgid", { length: 128 }).notNull().default(""),
+    sender: varchar("sender", { length: 128 }).notNull(),
+    chatIds: text("chat_ids").notNull(),
+    textContent: text("text_content").notNull(),
+    linkUrl: text("link_url").notNull(),
+    failList: text("fail_list").notNull(),
+    createdAt: timestamp("created_at"),
+  },
+  (table) => [index("wecom_group_pushes_task_idx").on(table.taskId)],
+);
+
 export const backgroundJobs = mysqlTable(
   "background_jobs",
   {