fix(M02): 저장 직후 지우기가 409 로 거절되던 흠 — 저장 뒤 좌측 목록 다시 읽음 · 지우기 전에도 최신 판으로

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0148XFUpPfpiuTjxF1EK9c95

M02_MasterTemplete/M02_MasterTemplete_UI_Main.ts

@@ -55,7 +55,7 @@ export function canEdit(layer: Layer, isAdmin: boolean): boolean {
   return layer === "project" || layer === "personal" || (layer === "system" && isAdmin);
 }
 
-export function createMain(isAdmin: boolean): MainHandle {
+export function createMain(isAdmin: boolean, onSaved?: () => void): MainHandle {
   const title = el("h2", { className: "m02-main__title", text: L("M02_PickTemplate") });
   const reload = createButton({ label: L("M02_Reload"), variant: "ghost" });
   const save = createButton({ label: L("M02_Save"), variant: "filled" });
@@ -168,6 +168,7 @@ export function createMain(isAdmin: boolean): MainHandle {
       loaded = doc;
       showNotice([]);
       showToast(L("M02_Saved"), "success");
+      onSaved?.(); // 좌측 목록의 판을 새 판으로
     } catch (error) {
       if (error instanceof StaleError) {
         const again = createButton({ label: L("M02_Reload"), variant: "ghost" });