重构: 后端编排拆解与DRY债收敛及命名纠偏

阶段1拆解: stream 系外移 stream_relay.rs,mod.rs 3048→2607,loop_body 502→83
技能收尾: regenerate/edit 回溯补技能,新增 read_skill 工具,项目级技能扫描
DRY: emit 双写 46 处收敛 event_bus 正典,KV 引号归一收口,LOCK-SLOW 33 处单行化
警示骨架 4→1 与压缩兜底 2→1,噪音目录档位收敛,truncate 同名陷阱消除
工具元数据落 ToolMeta 八维,7 张 match 表改查 registry,parity 测试锁等价
命名: is_noise_entry/teardown_round/probe_missed_terminal_event 等 6 项纠偏

src-tauri/src/commands/settings.rs

@@ -127,7 +127,7 @@ pub async fn set_plan_execution(enabled: bool) -> Result<(), String> {
 
 /// 读取多 ReAct Plan 执行开关状态。
 #[tauri::command]
-pub async fn get_plan_execution() -> Result<bool, String> {
+pub async fn is_plan_execution_enabled() -> Result<bool, String> {
     Ok(df_ai::plan_executor::plan_execution_enabled())
 }
 
@@ -234,7 +234,6 @@ pub async fn resolve_conflict(
     resolved_by: String,
     conversation_id: Option<String>,
 ) -> Result<(), String> {
-    use tauri::Emitter;
     let repo = df_storage::crud::ConflictRepo::new(&state.db);
     let now = df_types::now_millis().to_string();
     let ok = repo.resolve(&conflict_id, &resolution, &resolved_by, &now)
@@ -249,7 +248,7 @@ pub async fn resolve_conflict(
         resolved_by = %resolved_by,
         "[CONFLICT] 冲突已解决"
     );
-    // emit AiConflictResolved 事件
+    // emit AiConflictResolved 事件(双写收敛经 emit_ai_chat_event)
     let ev = crate::commands::ai::AiChatEvent::AiConflictResolved {
         conflict_id,
         plan_id,
@@ -257,7 +256,6 @@ pub async fn resolve_conflict(
         resolved_by,
         conversation_id,
     };
-    let _ = app_handle.emit("ai-chat-event", ev.clone());
-    let _ = state.ai_event_bus.publish_event(ev);
+    crate::commands::ai::event_bus::emit_ai_chat_event(&app_handle, ev);
     Ok(())
 }