feat(export): v4.7.0 Export — Markdown, PDF, HTML, Site statique

- Service serveur app/services/export.py: conversion blocs vers Markdown / HTML / PDF
- 4 endpoints: /api/export/markdown|html|pdf|site/{page_id}
- Export Markdown complet (tous les blocs + images + sous-pages recursives)
- Export PDF via xhtml2pdf (pur Python, aucune lib systeme)
- Export HTML standalone self-contained (styles inline)
- Export Site: zip multi-pages (index.html + une page par sous-page)
- UI: menu 'More > Export' dans l'editeur (Markdown, HTML, PDF, Site .zip)
- Tests: 190 passing (6 nouveaux)

app/main.py

@@ -13,7 +13,7 @@ from app.config import settings
 from app.db import init_db
 from app.middleware.csrf import CSRFMiddleware
 from app.middleware.security import ContentSecurityPolicyMiddleware, RateLimitMiddleware
-from app.routers import dashboard, board, notes, api, auth, webhooks, collections, my_tasks, workspace, library, public_api, admin, sharing, sidebar_config
+from app.routers import dashboard, board, notes, api, auth, webhooks, collections, my_tasks, workspace, library, public_api, admin, sharing, sidebar_config, export
 from app.routers.gitea import router as gitea_router
 from app.routers.github_routes import router as github_router
 from app.services.gitea_client import gitea
@@ -39,13 +39,13 @@ async def lifespan(_app: FastAPI):
             (admin_hash,)
         )
         conn.commit()
-    logger.info("FlowDeck v4.6.0 started on port %d", settings.app_port)
+    logger.info("FlowDeck v4.7.0 started on port %d", settings.app_port)
     yield
 
 
 app = FastAPI(
     title="FlowDeck",
-    version="4.6.0",
+    version="4.7.0",
     docs_url="/docs" if settings.log_level == "DEBUG" else None,
     redoc_url=None,
     lifespan=lifespan,
@@ -73,6 +73,7 @@ app.include_router(github_router)
 app.include_router(public_api.router)
 app.include_router(sharing.router)
 app.include_router(sidebar_config.router)
+app.include_router(export.router)
 
 app.mount("/static", StaticFiles(directory="static"), name="static")