fix(saas): 启动崩溃修复 — config_items 约束 + industry 类型匹配

- db.rs: config_items INSERT ON CONFLICT (id) → (category, key_path) 匹配实际唯一约束
- db.rs: fix_seed_data category 重命名前先删除冲突行，避免唯一约束冲突
- migration/service.rs: seed_default_config_items + sync push INSERT 同步修复 ON CONFLICT
- industry/types.rs: keywords_count i64→i32 匹配 PostgreSQL INT4 列类型

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/zclaw-saas/src/db.rs

@@ -742,7 +742,7 @@ async fn seed_demo_data(pool: &PgPool) -> SaasResult<()> {
         let id = format!("cfg-{}-{}", cat, key);
         sqlx::query(
             "INSERT INTO config_items (id, category, key_path, value_type, current_value, default_value, source, description, created_at, updated_at)
-             VALUES ($1, $2, $3, $4, $5, $6, 'local', $7, $8, $8) ON CONFLICT (id) DO NOTHING"
+             VALUES ($1, $2, $3, $4, $5, $6, 'local', $7, $8, $8) ON CONFLICT (category, key_path) DO NOTHING"
         ).bind(&id).bind(cat).bind(key).bind(vtype).bind(current).bind(default).bind(desc).bind(&ts)
         .execute(pool).await?;
     }
@@ -854,6 +854,7 @@ async fn fix_seed_data(pool: &PgPool) -> SaasResult<()> {
     let admin_ids: Vec<String> = admins.into_iter().map(|(id,)| id).collect();
 
     // 2. 更新 config_items 分类名（旧 → 新）
+    // 先删除目标 (category, key_path) 已存在的旧 category 行，避免唯一约束冲突
     let category_mappings = [
         ("server", "general"),
         ("llm", "model"),
@@ -862,6 +863,13 @@ async fn fix_seed_data(pool: &PgPool) -> SaasResult<()> {
         ("security", "rate_limit"),
     ];
     for (old_cat, new_cat) in &category_mappings {
+        // 删除旧 category 中与目标 category key_path 冲突的行
+        sqlx::query(
+            "DELETE FROM config_items WHERE category = $1 AND key_path IN \
+             (SELECT key_path FROM config_items WHERE category = $2)"
+        ).bind(old_cat).bind(new_cat)
+        .execute(pool).await?;
+
         let result = sqlx::query(
             "UPDATE config_items SET category = $1, updated_at = $2 WHERE category = $3"
         ).bind(new_cat).bind(&now).bind(old_cat)
@@ -889,7 +897,7 @@ async fn fix_seed_data(pool: &PgPool) -> SaasResult<()> {
             let id = format!("cfg-{}-{}", cat, key);
             sqlx::query(
                 "INSERT INTO config_items (id, category, key_path, value_type, current_value, default_value, source, description, created_at, updated_at)
-                 VALUES ($1, $2, $3, $4, $5, $6, 'local', $7, $8, $8) ON CONFLICT (id) DO NOTHING"
+                 VALUES ($1, $2, $3, $4, $5, $6, 'local', $7, $8, $8) ON CONFLICT (category, key_path) DO NOTHING"
             ).bind(&id).bind(cat).bind(key).bind(vtype).bind(current).bind(default).bind(desc).bind(&now)
             .execute(pool).await?;
         }