feat(editor): v4.8.0 Bloc Tableau simple (edition Notion via /table)

- Bloc table editable: slash /table, cellules contenteditable, auto-save
- Colonnes: poignee par colonne -> Insert left/right, Duplicate, Clear, Delete
- Lignes: + Row (bas) + menu contextuel -> Insert above/below, Dup, Clear, Del
- md2b importe les tableaux GFM pipe en bloc table (au lieu de paragraphes)
- Roundtrip markdown (JS + export Python MD/HTML/PDF)
- CSS .ftable-editor + menu flottant (app.css?v=4.8.0)
- VERSION/CHANGELOG/ROADMAP bump 4.8.0 (Collaboration -> v4.9.0, Agent -> v4.10.0)

app/main.py

@@ -39,13 +39,13 @@ async def lifespan(_app: FastAPI):
             (admin_hash,)
         )
         conn.commit()
-    logger.info("FlowDeck v4.7.3 started on port %d", settings.app_port)
+    logger.info("FlowDeck v4.8.0 started on port %d", settings.app_port)
     yield
 
 
 app = FastAPI(
     title="FlowDeck",
-    version="4.7.3",
+    version="4.8.0",
     docs_url="/docs" if settings.log_level == "DEBUG" else None,
     redoc_url=None,
     lifespan=lifespan,