feat(M02): 원문 다운로드 — 제목 행 단추 · pdf 통째 길(책 이름만) · 원문 읽기 M02 대리 길(85-4)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W4uKaV4ZBhsJN4GHG7yRj4

M01_MasterData/M01_MasterData_UI_LogicLab_Source.ts

@@ -1,7 +1,8 @@
 /* =============================================================================
  * M01_MasterData_UI_LogicLab_Source.ts
  * 원문 보기(품셈 본문 절) — 출처 글로 서버가 찾음(`GET /m01/logic/source`) · 늦게 온 답은 버림
- * M01 로직 상세 「원문」 패널 · M02 일위대가 상세 「원문」 패널(47-4)이 같이 씀
+ * M01 로직 상세 「원문」 패널 · M02 일위대가 상세 「원문」 패널(47-4)이 같이 씀 ·
+ * 길은 부르는 쪽이 줌(85-4 · M02 = `/m02/logic-lib/source` + 제목 행 [원문 다운로드] pdf 통째)
  * ========================================================================== */
 
 import { currentLanguageIndex } from "@ui/ui_template_locale";
@@ -16,6 +17,7 @@ const TEXT = {
   From: ["출처", "Source"],
   NoSource: ["출처 없음", "No source"],
   Near: ["{v} 절이 없어 위 절", "No {v} section — showing the parent"],
+  Download: ["원문 다운로드", "Download source"],
 } as const;
 
 const ts = (key: keyof typeof TEXT, v = ""): string =>
@@ -70,15 +72,38 @@ export interface SourceView {
   show(src: string): void;
 }
 
-export function createSourceView(): SourceView {
+/** 출처 글 → 원문 pdf 책(85-4) — 모르면 null */
+const bookOf = (src: string): string | null =>
+  src.startsWith("건설품셈") ? "건설" : src.startsWith("산림품셈") ? "산림" : null;
+
+export interface SourceViewOptions {
+  /** 원문 절 길(기본 M01 `/m01/logic/source` — 시스템 관리자) */
+  path?: string;
+  /** 원문 pdf 길(`?book=`) — 주면 제목 행 오른쪽 [원문 다운로드] */
+  pdf?: string;
+}
+
+export function createSourceView(opts: SourceViewOptions = {}): SourceView {
   const body = el("div", { className: "m01lab-src__body" });
   const title = el("strong", { className: "m02-dfp__title" });
+  const download = opts.pdf
+    ? (el("a", {
+        className: "ui-btn ui-btn--ghost ui-btn--sm",
+        text: ts("Download"),
+        attrs: { download: "", "data-source-pdf": "" },
+      }) as HTMLAnchorElement)
+    : null;
   let shown: string | null = null;
 
   const show = (src: string): void => {
     if (shown === src) return;
     shown = src;
     title.textContent = src || ts("NoSource");
+    if (download) {
+      const book = bookOf(src);
+      download.hidden = !book;
+      download.href = book ? `${API_BASE_URL}${opts.pdf}?${new URLSearchParams({ book })}` : "";
+    }
     body.replaceChildren(el("p", { className: "m01-logic__muted", text: ts("Loading") }));
     const none = (): void =>
       body.replaceChildren(
@@ -86,9 +111,12 @@ export function createSourceView(): SourceView {
         el("p", { className: "m01-logic__muted", text: `${ts("From")} · ${src || "—"}` }),
       );
     if (!src.trim()) return none();
-    void fetch(`${API_BASE_URL}/m01/logic/source?${new URLSearchParams({ src })}`, {
-      credentials: "include",
-    })
+    void fetch(
+      `${API_BASE_URL}${opts.path ?? "/m01/logic/source"}?${new URLSearchParams({ src })}`,
+      {
+        credentials: "include",
+      },
+    )
       .then((r) => (r.ok ? (r.json() as Promise<{ found: Found[] }>) : { found: [] }))
       .catch(() => ({ found: [] as Found[] }))
       .then(({ found }) => {
@@ -115,5 +143,8 @@ export function createSourceView(): SourceView {
       });
   };
 
-  return { root: el("div", { className: "m01lab-src", children: [title, body] }), show };
+  const head = download
+    ? el("div", { className: "m02-dfp__head", children: [title, download] })
+    : title;
+  return { root: el("div", { className: "m01lab-src", children: [head, body] }), show };
 }