v4.3.38: 법률 어시스턴트 앱에 사건(사건 기록) 관리 기능 추가

- 채팅창 파일 첨부 버튼 추가 (PDF/TXT, 회계사 앱과 같은 /api/upload/file 재사용,
  pdf_read로 계약서 분석 — 스킬 프롬프트엔 이미 방법론이 있었는데 버튼만 없었음)
- 탐정 앱의 "사건" 관리를 법률 앱에 이식: 사건 목록(검색/정렬) + 사건별 메모·
  체크리스트·타임라인·첨부자료·제출서류 탭 + 사건별 독립 AI 대화 세션
  (다른 사건 컨텍스트가 안 섞임, 탐정 앱과 동일 패턴)
- PDF 편집기(Stirling-PDF)·Collabora 문서 편집 연동도 그대로 이식 — 사건 폴더에
  자동 저장됨
- 백엔드는 탐정 앱 기존 코드를 건드리지 않고 새 공용 모듈(case-storage.ts)로
  일반화 — appType 파라미터로 detective/lawyer 둘 다 같은 로직 재사용,
  탐정 앱 데이터·동작은 그대로 유지(회귀 테스트로 확인)
- 사진 자동 날짜인식(탐정 앱 전용, 카톡 캡처 등에서 날짜 추출) 등 법률 사건과
  무관한 기능은 이식 범위에서 제외

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/gateway/server.ts

@@ -81,7 +81,7 @@ import { registerUserAppSessionRoutes } from './routes/routes-user-app-sessions'
 import { registerChannelMappingRoutes } from './routes/routes-channel-mappings';
 import { registerAdminSessionRoutes } from './routes/routes-admin-sessions';
 import { registerUserRoutes } from './routes/routes-users';
-import { registerDetectiveRoutes, detectiveFilesDir, resolveDetectiveUploadPath } from './routes/routes-detective';
+import { registerDetectiveRoutes } from './routes/routes-detective';
 import { registerPptxRoutes } from './routes/routes-pptx';
 import { registerVoiceRoutes } from './routes/routes-voice';
 import { registerVoiceRealtimeRoutes, attachVoiceRealtimeWsProxy } from './routes/routes-voice-realtime';
@@ -91,6 +91,8 @@ import { registerLanguageRoutes } from './routes/routes-language';
 import { registerWriterRoutes } from './routes/routes-writer';
 import { registerDentalRoutes } from './routes/routes-dental';
 import { registerDetectiveDateRoutes } from './routes/routes-detective-dates';
+import { registerLawyerCaseRoutes } from './routes/routes-lawyer-cases';
+import { caseFilesDir, resolveUploadPath, registerWopiRoutes } from './routes/case-storage';
 import {
   getConfig,
   getAgents,
@@ -2676,12 +2678,16 @@ app.use('/wavacity', express.static(path.join(webUiPath, 'wavacity'), {
 // URL with no query string. (Stirling-PDF's root path has a bug where a
 // query string on the bare context-path root causes a broken redirect —
 // see /pdf-editor below — so the case id is never sent in that request.)
+// Cookie value is "<appType>:<caseId>" so the same Stirling-PDF instance and
+// auto-save logic serve any case-backed app (detective, lawyer, ...) — app
+// defaults to 'detective' when omitted, for links that predate the lawyer app.
 app.get('/pdf-editor-open', (req: express.Request, res: express.Response) => {
   const session = getSessionUser(req);
   if (!session) { res.redirect('/html/login.html'); return; }
   const caseId = String(req.query.caseId || '');
-  if (/^[a-zA-Z0-9_-]+$/.test(caseId)) {
-    res.setHeader('Set-Cookie', `dt_pdf_case=${caseId}; Path=/pdf-editor; HttpOnly; SameSite=Lax; Max-Age=3600`);
+  const appType = String(req.query.app || 'detective');
+  if (/^[a-zA-Z0-9_-]+$/.test(caseId) && /^[a-z]+$/.test(appType)) {
+    res.setHeader('Set-Cookie', `dt_pdf_case=${appType}:${caseId}; Path=/pdf-editor; HttpOnly; SameSite=Lax; Max-Age=3600`);
   }
   res.redirect('/pdf-editor/');
 });
@@ -2697,7 +2703,11 @@ app.get('/pdf-editor-open', (req: express.Request, res: express.Response) => {
 // the browser as normal, so "download" in the editor also lands in the case.
 app.use('/pdf-editor', (req: express.Request, res: express.Response) => {
   const cookies = parseCookies(req);
-  const caseId = cookies['dt_pdf_case'] || '';
+  const rawCookie = cookies['dt_pdf_case'] || '';
+  const colonIdx = rawCookie.indexOf(':');
+  // No colon = old-format cookie set before app-scoping existed — treat as detective.
+  const appType = colonIdx >= 0 ? rawCookie.slice(0, colonIdx) : 'detective';
+  const caseId = colonIdx >= 0 ? rawCookie.slice(colonIdx + 1) : rawCookie;
   const session = getSessionUser(req);
 
   const proxyReq = http.request({
@@ -2721,16 +2731,16 @@ app.use('/pdf-editor', (req: express.Request, res: express.Response) => {
     proxyRes.on('end', () => {
       const body = Buffer.concat(chunks);
       try {
-        const dir = detectiveFilesDir(session!.username, caseId);
+        const dir = caseFilesDir(session!.username, appType, caseId);
         fs.mkdirSync(dir, { recursive: true });
         let filename = 'edited.pdf';
         const fnStar = cd.match(/filename\*=UTF-8''([^;]+)/i);
         const fnPlain = cd.match(/filename="?([^";]+)"?/i);
         if (fnStar) { try { filename = decodeURIComponent(fnStar[1]); } catch {} }
         else if (fnPlain) filename = fnPlain[1];
-        const { relPath, absPath } = resolveDetectiveUploadPath(dir, filename);
+        const { relPath, absPath } = resolveUploadPath(dir, filename);
         fs.writeFileSync(absPath, body);
-        console.log(`[pdf-editor] saved result to case ${caseId}: ${relPath}`);
+        console.log(`[pdf-editor] saved result to ${appType} case ${caseId}: ${relPath}`);
       } catch (err) {
         console.error('[pdf-editor] auto-save failed:', err);
       }
@@ -4357,6 +4367,8 @@ registerUserRoutes(app, {
   CONFIG_DIR_PATH,
 });
 registerDetectiveRoutes(app, getSessionUser, isPathInsideDir, CONFIG_DIR_PATH);
+registerLawyerCaseRoutes(app, getSessionUser, isPathInsideDir);
+registerWopiRoutes(app, '/api/lawyer');
 
 
 // Redirect legacy top-level HTML routes into /html/ after web-ui reorganization.