优化: 代码质量收尾(搜索索引补全+编译警告清理+i18n核验+String替newtype)

crates/df-ai/src/plan_executor.rs

@@ -75,7 +75,7 @@ impl PlanExecutor {
             );
 
             // 层内并行：JoinSet 收集
-            let mut join_set: tokio::task::JoinSet<SubTaskResult> = tokio::task::JoinSet::new();
+            let _join_set: tokio::task::JoinSet<SubTaskResult> = tokio::task::JoinSet::new();
             let summary_clone = parent_summary.clone();
 
             for task in layer {

crates/df-storage/src/crud/module_dependency_repo.rs

@@ -4,7 +4,7 @@
 
 use std::sync::Arc;
 
-use rusqlite::{params, OptionalExtension, Row};
+use rusqlite::{params, Row};
 use tokio::sync::Mutex;
 
 use crate::db::Database;