重构: AI流式断线保文StreamResult三分支+重试对齐决策a1,推进链落df-nodes

src-tauri/src/commands/knowledge.rs

@@ -107,7 +107,7 @@ pub async fn knowledge_search(
     state: State<'_, AppState>,
     input: KnowledgeSearchInput,
 ) -> Result<Vec<KnowledgeRecord>, String> {
-    let limit = input.limit.unwrap_or(3).min(3);
+    let limit = input.limit.unwrap_or(3).min(20);
     state
         .knowledge
         .search(&input.query, input.kind.as_deref(), limit)