feat(industry): Phase 1 行业配置基础 — 数据模型 + 四行业内置配置 + ButlerRouter 动态关键词

- 新增 SaaS industry 模块 (types/service/handlers/mod/builtin)
- 4 行业内置配置: healthcare/education/garment/ecommerce
- 数据库迁移: industries + account_industries 表
- 8 个 API 端点 (CRUD + 用户行业关联)
- ButlerRouter 改造: 支持 IndustryKeywordConfig 动态注入
- 12 个测试全通过 (含动态行业分类测试)

crates/zclaw-saas/src/industry/mod.rs

@@ -0,0 +1,25 @@
+//! 行业配置模块
+//!
+//! 提供行业定义、关键词、system prompt、痛点种子等配置管理。
+//! 支持内置行业（builtin）和 Admin 自定义行业。
+
+pub mod types;
+pub mod builtin;
+pub mod service;
+pub mod handlers;
+
+use axum::routing::{get, patch, post, put};
+
+pub fn routes() -> axum::Router<crate::state::AppState> {
+    axum::Router::new()
+        // 公开路由（已认证用户）
+        .route("/api/v1/industries", get(handlers::list_industries))
+        .route("/api/v1/industries/:id", get(handlers::get_industry))
+        .route("/api/v1/industries/:id/full-config", get(handlers::get_industry_full_config))
+        .route("/api/v1/accounts/me/industries", get(handlers::list_my_industries))
+        .route("/api/v1/accounts/:id/industries", get(handlers::list_account_industries))
+        // Admin 路由
+        .route("/api/v1/industries", post(handlers::create_industry))
+        .route("/api/v1/industries/:id", patch(handlers::update_industry))
+        .route("/api/v1/accounts/:id/industries", put(handlers::set_account_industries))
+}