新增: Phase2 阶段收尾（Sprint 1-20）

重构：删 5 零引用 crate（df-evolve/plugin/stages/task/traceability）+ 清死模块、ai.rs 拆 11 子 module、ai.ts 拆 6 composable、i18n 拆目录
功能：知识库全栈（df-project/scan + CRUD + 时间线 + 前端）、Settings 拆分、appSettings KV 迁移、模型池、LLM 并发 Semaphore
修复：审批持久化根治、ConditionEngine 默认拒绝、NodeRegistry unimplemented 清除、promote 补偿删除、工具结果截断 50KB、路径校验防 symlink 逃逸
文档：B-03 人工审批设计、决策记录三分档、规格契约自检、经验记录、todo 看板、PROGRESS 更新

详见 PROGRESS.md。src-tauri/儿童每日打卡应用/ 与本项目无关，已排除。

crates/df-nodes/src/http_node.rs

@@ -1,43 +0,0 @@
-//! HTTP 节点 — 发起 HTTP 请求
-
-use async_trait::async_trait;
-use df_workflow::node::{Node, NodeContext, NodeOutput, NodeResult, NodeSchema};
-
-/// HTTP 节点
-pub struct HttpNode;
-
-#[async_trait]
-impl Node for HttpNode {
-    async fn execute(&self, _ctx: NodeContext) -> NodeResult {
-        // TODO: 实现HTTP请求逻辑
-        tracing::info!("HttpNode 执行: 发送 HTTP 请求");
-        Ok(NodeOutput::empty())
-    }
-
-    fn schema(&self) -> NodeSchema {
-        NodeSchema {
-            params: serde_json::json!({
-                "type": "object",
-                "properties": {
-                    "method": { "type": "string", "enum": ["GET", "POST", "PUT", "DELETE"] },
-                    "url": { "type": "string" },
-                    "headers": { "type": "object" },
-                    "body": {}
-                },
-                "required": ["method", "url"]
-            }),
-            output: serde_json::json!({
-                "type": "object",
-                "properties": {
-                    "status": { "type": "integer" },
-                    "body": {},
-                    "headers": { "type": "object" }
-                }
-            }),
-        }
-    }
-
-    fn node_type(&self) -> &str {
-        "http"
-    }
-}