feat: add move installation/folder UI with admin-only access control

- Add MoveModal component with folder dropdown and circular-reference protection
- Add move icon button to each tree row (admin only)
- Add moveInstallation and moveFolder functions to InstallationsContext
- Restrict CreateFolder, MoveFolder, MoveInstallation to admin only (UserType==2) in backend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

csharp/App/Backend/DataTypes/Methods/Session.cs

@@ -15,7 +15,7 @@ public static class SessionMethods
 
         return user is not null
             && folder is not null
-            && user.UserType!=0
+            && user.UserType==2
             && user.HasAccessTo(folder.Parent())
             && Db.Create(folder)                // TODO: these two in a transaction
             && Db.Create(new FolderAccess { UserId = user.Id, FolderId = folder.Id });
@@ -44,7 +44,7 @@ public static class SessionMethods
         
         return user is not null
                && folder is not null
-               && user.UserType !=0
+               && user.UserType==2
                && user.HasAccessTo(folder)
                && user.HasAccessTo(parent)
                && folder
@@ -61,7 +61,7 @@ public static class SessionMethods
         if(installation == null || installation.ParentId == parentId) return false;
         
         return user is not null
-               && user.UserType  !=0
+               && user.UserType==2
                && user.HasAccessTo(installation)
                && user.HasAccessTo(parent)
                && installation

typescript/frontend-marios2/src/content/dashboards/Tree/CustomTreeItem.tsx

@@ -1,15 +1,19 @@
 import React, { ReactNode, useContext, useState } from 'react';
-import { CircularProgress, ListItemIcon, useTheme } from '@mui/material';
+import { CircularProgress, IconButton, ListItemIcon, useTheme } from '@mui/material';
 import { TreeItem } from '@mui/lab';
 import { I_Folder, I_Installation } from 'src/interfaces/InstallationTypes';
 import FolderIcon from '@mui/icons-material/Folder';
 import InsertDriveFileIcon from '@mui/icons-material/InsertDriveFile';
+import DriveFileMoveOutlinedIcon from '@mui/icons-material/DriveFileMoveOutlined';
 import Typography from '@mui/material/Typography';
 import { makeStyles } from '@mui/styles';
 import CancelIcon from '@mui/icons-material/Cancel';
 import routes from 'src/Resources/routes.json';
 import { useLocation, useNavigate } from 'react-router-dom';
 import { ProductIdContext } from '../../../contexts/ProductIdContextProvider';
+import { UserContext } from '../../../contexts/userContext';
+import { UserType } from '../../../interfaces/UserTypes';
+import MoveModal from './MoveModal';
 
 interface CustomTreeItemProps {
   node: I_Installation | I_Folder;
@@ -41,8 +45,10 @@ function CustomTreeItem(props: CustomTreeItemProps) {
   const status = props.node.status;
   const navigate = useNavigate();
   const [selected, setSelected] = useState(false);
+  const [openMoveModal, setOpenMoveModal] = useState(false);
   const currentLocation = useLocation();
   const { product } = useContext(ProductIdContext);
+  const { currentUser } = useContext(UserContext);
 
   const handleSelectOneInstallation = (): void => {
     let installation = props.node;
@@ -126,6 +132,24 @@ function CustomTreeItem(props: CustomTreeItemProps) {
             {props.node.name}
           </Typography>
 
+          {currentUser.userType === UserType.admin && (
+            <div onClick={(e) => e.stopPropagation()}>
+              <IconButton
+                size="small"
+                onClick={() => setOpenMoveModal(true)}
+                sx={{ ml: 1 }}
+              >
+                <DriveFileMoveOutlinedIcon fontSize="small" />
+              </IconButton>
+              {openMoveModal && (
+                <MoveModal
+                  node={props.node}
+                  onClose={() => setOpenMoveModal(false)}
+                />
+              )}
+            </div>
+          )}
+
           {props.node.type === 'Installation' && (
             <div>
               {status === -1 ? (

typescript/frontend-marios2/src/content/dashboards/Tree/MoveModal.tsx

@@ -0,0 +1,165 @@
+import React, { useContext, useState } from 'react';
+import {
+  Alert,
+  Box,
+  CircularProgress,
+  FormControl,
+  IconButton,
+  InputLabel,
+  MenuItem,
+  Modal,
+  Select,
+  Typography,
+  useTheme
+} from '@mui/material';
+import Button from '@mui/material/Button';
+import { Close as CloseIcon } from '@mui/icons-material';
+import { I_Folder, I_Installation } from 'src/interfaces/InstallationTypes';
+import { InstallationsContext } from 'src/contexts/InstallationsContextProvider';
+import { ProductIdContext } from 'src/contexts/ProductIdContextProvider';
+import { FormattedMessage } from 'react-intl';
+
+interface MoveModalProps {
+  node: I_Installation | I_Folder;
+  onClose: () => void;
+}
+
+// Returns the IDs of a folder and all its descendants (to prevent circular moves)
+function getDescendantIds(folderId: number, allItems: any[]): Set<number> {
+  const result = new Set<number>([folderId]);
+  const queue = [folderId];
+  while (queue.length > 0) {
+    const currentId = queue.shift();
+    allItems
+      .filter((item) => item.parentId === currentId && item.type === 'Folder')
+      .forEach((child) => {
+        result.add(child.id);
+        queue.push(child.id);
+      });
+  }
+  return result;
+}
+
+function MoveModal(props: MoveModalProps) {
+  const theme = useTheme();
+  const { foldersAndInstallations, moveInstallation, moveFolder, loading, setLoading, error, setError } =
+    useContext(InstallationsContext);
+  const { product } = useContext(ProductIdContext);
+  const [selectedFolderId, setSelectedFolderId] = useState<number | ''>('');
+
+  // For folders: exclude self and all descendants to prevent circular nesting
+  // For installations: any folder is valid
+  const excludedIds =
+    props.node.type === 'Folder'
+      ? getDescendantIds(props.node.id, foldersAndInstallations)
+      : new Set<number>();
+
+  const availableFolders = foldersAndInstallations.filter(
+    (item) => item.type === 'Folder' && !excludedIds.has(item.id)
+  );
+
+  const handleSubmit = async () => {
+    if (selectedFolderId === '') return;
+    setLoading(true);
+    setError(false);
+    if (props.node.type === 'Installation') {
+      await moveInstallation(props.node.id, selectedFolderId as number, product);
+    } else {
+      await moveFolder(props.node.id, selectedFolderId as number, product);
+    }
+    setLoading(false);
+    props.onClose();
+  };
+
+  return (
+    <Modal
+      open={true}
+      onClose={() => {}}
+      aria-labelledby="move-modal"
+    >
+      <Box
+        sx={{
+          position: 'absolute',
+          top: '40%',
+          left: '50%',
+          transform: 'translate(-50%, -50%)',
+          width: 500,
+          bgcolor: 'background.paper',
+          borderRadius: 4,
+          boxShadow: 24,
+          p: 4
+        }}
+      >
+        <Typography variant="subtitle1" fontWeight="bold" mb={2}>
+          <FormattedMessage id="moveTo" defaultMessage="Move to" />:{' '}
+          <span style={{ color: theme.palette.primary.main }}>
+            {props.node.name}
+          </span>
+        </Typography>
+
+        <FormControl fullWidth sx={{ mb: 2 }}>
+          <InputLabel sx={{ fontSize: 14, backgroundColor: 'white' }}>
+            <FormattedMessage id="folder" defaultMessage="Folder" />
+          </InputLabel>
+          <Select
+            value={selectedFolderId}
+            onChange={(e) => setSelectedFolderId(e.target.value as number)}
+          >
+            {availableFolders.map((folder: I_Folder) => (
+              <MenuItem key={folder.id} value={folder.id}>
+                {folder.name}
+              </MenuItem>
+            ))}
+          </Select>
+        </FormControl>
+
+        <div style={{ display: 'flex', alignItems: 'center', marginTop: 10 }}>
+          <Button
+            variant="contained"
+            onClick={handleSubmit}
+            disabled={selectedFolderId === ''}
+            sx={{ marginLeft: '10px' }}
+          >
+            <FormattedMessage id="submit" defaultMessage="Submit" />
+          </Button>
+
+          <Button
+            variant="contained"
+            onClick={props.onClose}
+            sx={{ marginLeft: '10px' }}
+          >
+            <FormattedMessage id="cancel" defaultMessage="Cancel" />
+          </Button>
+
+          {loading && (
+            <CircularProgress
+              sx={{ color: theme.palette.primary.main, marginLeft: '20px' }}
+            />
+          )}
+
+          {error && (
+            <Alert
+              severity="error"
+              sx={{ ml: 1, display: 'flex', alignItems: 'center' }}
+            >
+              <FormattedMessage
+                id="errorOccured"
+                defaultMessage="An error has occurred"
+              />
+              <IconButton
+                color="inherit"
+                size="small"
+                onClick={() => setError(false)}
+                sx={{ marginLeft: '4px' }}
+              >
+                <CloseIcon fontSize="small" />
+              </IconButton>
+            </Alert>
+          )}
+        </div>
+      </Box>
+    </Modal>
+  );
+}
+
+export default MoveModal;

typescript/frontend-marios2/src/contexts/InstallationsContextProvider.tsx

@@ -349,6 +349,42 @@ const InstallationsContextProvider = ({
     [fetchAllFoldersAndInstallations, navigate, removeToken]
   );
 
+  const moveInstallation = useCallback(
+    async (installationId: number, parentId: number, product: number) => {
+      try {
+        await axiosConfig.put(
+          `/MoveInstallation?installationId=${installationId}&parentId=${parentId}`
+        );
+        await fetchAllFoldersAndInstallations(product);
+      } catch (error) {
+        setError(true);
+        if (error.response?.status === 401) {
+          removeToken();
+          navigate(routes.login);
+        }
+      }
+    },
+    [fetchAllFoldersAndInstallations, navigate, removeToken]
+  );
+
+  const moveFolder = useCallback(
+    async (folderId: number, parentId: number, product: number) => {
+      try {
+        await axiosConfig.put(
+          `/MoveFolder?folderId=${folderId}&parentId=${parentId}`
+        );
+        await fetchAllFoldersAndInstallations(product);
+      } catch (error) {
+        setError(true);
+        if (error.response?.status === 401) {
+          removeToken();
+          navigate(routes.login);
+        }
+      }
+    },
+    [fetchAllFoldersAndInstallations, navigate, removeToken]
+  );
+
   const contextValue = useMemo(
     () => ({
       salimax_or_sodistore_Installations,
@@ -369,6 +405,8 @@ const InstallationsContextProvider = ({
       createFolder,
       updateFolder,
       deleteFolder,
+      moveInstallation,
+      moveFolder,
       //currentProduct,
       socket,
       openSocket,