feat(est-test): 품셈 보기와 품셈자료 붙여넣기

- 원본 BookData 7권 해독(DBISAM 암호 표 Blowfish-CBC, zlib RTF) 서버 book-store.cjs, /api/book 경로
- 목차 트리·본문 표·제목/본문/키워드 검색·본문 강조·복사하기, 단가산출·내역·일위·기계 붙여넣기

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

resources/tester/test_est_book.py

@@ -0,0 +1,43 @@
+"""EST 테스트 앱 품셈 보기(원본 BookData 암호 표 해독 · 목차 · 본문 · 검색)."""
+
+import json
+import subprocess
+from pathlib import Path
+
+import pytest
+
+ROOT = Path(__file__).resolve().parents[2]
+BOOK = Path("C:/Dasansoft/Est Plus 2/System/BookData/forest.dat")
+
+
+def node(code: str):
+    return json.loads(subprocess.check_output(["node", "-e", code], cwd=ROOT).decode("utf-8"))
+
+
+def test_blowfish_constants_and_rtf_text():
+    out = node(r"""
+    const b = require('./tools/est-test/book-store.cjs');
+    const w = b.piWords(1042);
+    const rtf = Buffer.from(String.raw`{\rtf1{\fonttbl{\f0 x;}}\'b0\'a1\cell 1.2\row \u44032?\par}`, 'latin1');
+    process.stdout.write(JSON.stringify({ p0: w[0].toString(16), last: w[1041].toString(16), text: b.rtfText(rtf) }));
+    """)
+    assert out["p0"] == "243f6a88"
+    assert out["last"] == "3ac372e6"  # Blowfish S4[255]
+    assert out["text"] == "가\t1.2\n가\n"
+
+
+def test_installed_forest_book():
+    if not BOOK.exists():
+        pytest.skip("installed EST book data unavailable")
+    out = node(r"""
+    const b = require('./tools/est-test/book-store.cjs');
+    const list = b.list(), tree = b.tree('forest'), page = b.text('forest', 902);
+    process.stdout.write(JSON.stringify({ books: list.map((x) => x.name), forest: list.find((x) => x.name === 'forest'),
+      nodes: tree.length, page: page.text.split('\n').filter((l) => l.startsWith('1.0 이하'))[0],
+      title: b.search('forest', '교목 굴취').map((h) => h.pkid), body: b.search('forest', '근원직경을', 'body').length }));
+    """)
+    assert out["books"] == ["civil", "archit", "machine", "electric", "culture", "forest", "woods"]
+    assert out["forest"]["desc"].startswith("산림품셈(2026)") and out["forest"]["nodes"] == 563
+    assert out["page"] == "1.0 이하\t0.072\t0.012\t"
+    assert 902 in out["title"]
+    assert out["body"] >= 1