Feat: add VPS export functionality and import JSON feature in UI

vps-monitor/backend/main.py

@@ -727,6 +727,23 @@ def edit_vps(vps_id: str, body: VpsUpdateRequest, _: Annotated[dict, Depends(get
     return {"status": "ok"}
 
 
+@app.get("/api/vps/{vps_id}/export")
+def export_vps(vps_id: str, _: Annotated[dict, Depends(get_current_user)]):
+    """Exporte la configuration complète d'un VPS (y compris la clé API) pour import ailleurs."""
+    vps = next((v for v in load_vps() if v["id"] == vps_id), None)
+    if not vps:
+        raise HTTPException(status_code=404, detail="VPS introuvable")
+    return {
+        "id":          vps["id"],
+        "name":        vps["name"],
+        "host":        vps["host"],
+        "port":        vps["port"],
+        "api_key":     vps["api_key"],
+        "description": vps.get("description", ""),
+        "tags":        vps.get("tags", []),
+    }
+
+
 @app.get("/api/vps/{vps_id}/stats")
 def get_vps_stats(
     vps_id:   str,