feat(ai): 建议查询/审批 API 端点 + 权限注册

- GET /ai/suggestions?analysis_id=xxx — 查看建议列表（ai.suggestion.list）
- POST /ai/suggestions/{id}/approve — 批准/拒绝建议（ai.suggestion.manage）
- 新增 ai.suggestion.list 和 ai.suggestion.manage 权限码

crates/erp-ai/src/handler/mod.rs

@@ -12,6 +12,8 @@ use crate::dto::{AnalysisSseEvent, AnalysisType};
 use crate::service::suggestion::SuggestionService;
 use crate::state::AiState;
 
+pub mod suggestion_handler;
+
 // === 分析请求 Body ===
 
 #[derive(Debug, Deserialize)]