diff --git a/rsconcept/frontend/src/components/input/combo-box.tsx b/rsconcept/frontend/src/components/input/combo-box.tsx
deleted file mode 100644
index 725e08ec..00000000
--- a/rsconcept/frontend/src/components/input/combo-box.tsx
+++ /dev/null
@@ -1,93 +0,0 @@
-'use client';
-
-import { useState } from 'react';
-import { Check, ChevronDownIcon } from 'lucide-react';
-
-import { cn } from '@/lib/utils';
-
-import { Button } from '../ui/button';
-import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from '../ui/command';
-import { Popover, PopoverContent, PopoverTrigger } from '../ui/popover';
-
-interface ComboBoxProps<Option> {
-  items?: Option[];
-  value: Option | null;
-  onChange: (newValue: Option | null) => void;
-
-  filterFunc: (item: Option, query: string) => boolean;
-
-  idFunc: (item: Option) => string;
-  labelValueFunc: (item: Option) => string;
-  labelOptionFunc: (item: Option) => string;
-
-  placeholder?: string;
-  className?: string;
-  noBorder?: boolean;
-}
-
-/**
- * Displays a combo-select component.
- */
-export function ComboBox<Option>({
-  items,
-  filterFunc,
-  value,
-  onChange,
-  labelValueFunc,
-  labelOptionFunc,
-  idFunc,
-  noBorder,
-  placeholder,
-  className
-}: ComboBoxProps<Option>) {
-  const [open, setOpen] = useState(false);
-  const [query, setQuery] = useState('');
-
-  const filtered = items?.filter(item => filterFunc(item, query)) ?? [];
-
-  return (
-    <Popover open={open} onOpenChange={setOpen}>
-      <PopoverTrigger asChild>
-        <Button
-          variant='ghost'
-          role='combobox'
-          aria-expanded={open}
-          className={cn(
-            'justify-between font-normal hover:bg-input',
-            "[&_svg:not([class*='text-'])]:text-muted-foreground",
-            open && 'cursor-auto',
-            !noBorder && 'border',
-            !value && 'text-muted-foreground hover:text-muted-foreground',
-            className
-          )}
-        >
-          <span className='truncate'>{value ? labelValueFunc(value) : placeholder}</span>
-          <ChevronDownIcon />
-        </Button>
-      </PopoverTrigger>
-      <PopoverContent className='p-0'>
-        <Command>
-          <CommandInput value={query} onValueChange={setQuery} placeholder='Поиск...' className='h-9' />
-          <CommandList>
-            <CommandEmpty>Список пуст</CommandEmpty>
-            <CommandGroup>
-              {filtered.map(item => (
-                <CommandItem
-                  key={idFunc(item)}
-                  value={idFunc(item)}
-                  onSelect={() => {
-                    onChange(item);
-                    setOpen(false);
-                  }}
-                >
-                  {labelOptionFunc(item)}
-                  <Check className={cn('ml-auto', value === item ? 'opacity-100' : 'opacity-0')} />
-                </CommandItem>
-              ))}
-            </CommandGroup>
-          </CommandList>
-        </Command>
-      </PopoverContent>
-    </Popover>
-  );
-}
diff --git a/rsconcept/frontend/src/components/input/index.tsx b/rsconcept/frontend/src/components/input/index.tsx
index a1683efc..c6e9d37f 100644
--- a/rsconcept/frontend/src/components/input/index.tsx
+++ b/rsconcept/frontend/src/components/input/index.tsx
@@ -5,7 +5,6 @@ export { FileInput } from './file-input';
 export { Label } from './label';
 export { SearchBar } from './search-bar';
 export { SelectMulti, type SelectMultiProps } from './select-multi';
-export { SelectSingle } from './select-single';
 export { SelectTree } from './select-tree';
 export { TextArea } from './text-area';
 export { TextInput } from './text-input';
diff --git a/rsconcept/frontend/src/components/input/select-single.tsx b/rsconcept/frontend/src/components/input/select-single.tsx
deleted file mode 100644
index 7db90488..00000000
--- a/rsconcept/frontend/src/components/input/select-single.tsx
+++ /dev/null
@@ -1,126 +0,0 @@
-'use client';
-
-import Select, {
-  type ClearIndicatorProps,
-  components,
-  type DropdownIndicatorProps,
-  type GroupBase,
-  type Props,
-  type StylesConfig
-} from 'react-select';
-
-import { useWindowSize } from '@/hooks/use-window-size';
-import { APP_COLORS, SELECT_THEME } from '@/styling/colors';
-
-import { IconClose, IconDropArrow, IconDropArrowUp } from '../icons';
-
-function DropdownIndicator<Option, Group extends GroupBase<Option> = GroupBase<Option>>(
-  props: DropdownIndicatorProps<Option, false, Group>
-) {
-  return (
-    components.DropdownIndicator && (
-      <components.DropdownIndicator {...props}>
-        {props.selectProps.menuIsOpen ? <IconDropArrowUp size='1.25rem' /> : <IconDropArrow size='1.25rem' />}
-      </components.DropdownIndicator>
-    )
-  );
-}
-
-function ClearIndicator<Option, Group extends GroupBase<Option> = GroupBase<Option>>(
-  props: ClearIndicatorProps<Option, false, Group>
-) {
-  return (
-    components.ClearIndicator && (
-      <components.ClearIndicator {...props}>
-        <IconClose size='1.25rem' />
-      </components.ClearIndicator>
-    )
-  );
-}
-
-interface SelectSingleProps<Option, Group extends GroupBase<Option> = GroupBase<Option>>
-  extends Omit<Props<Option, false, Group>, 'theme' | 'menuPortalTarget'> {
-  noPortal?: boolean;
-  noBorder?: boolean;
-}
-
-/**
- * Displays a single-select component.
- */
-export function SelectSingle<Option, Group extends GroupBase<Option> = GroupBase<Option>>({
-  noPortal,
-  noBorder,
-  ...restProps
-}: SelectSingleProps<Option, Group>) {
-  const size = useWindowSize();
-
-  const adjustedStyles: StylesConfig<Option, false, Group> = {
-    container: defaultStyles => ({
-      ...defaultStyles,
-      borderRadius: '0.25rem'
-    }),
-    control: (defaultStyles, { isDisabled }) => ({
-      ...defaultStyles,
-      borderRadius: '0.25rem',
-      ...(noBorder ? { borderWidth: 0 } : {}),
-      cursor: isDisabled ? 'not-allowed' : 'pointer',
-      boxShadow: 'none'
-    }),
-    menuPortal: defaultStyles => ({
-      ...defaultStyles,
-      zIndex: 9999
-    }),
-    menuList: defaultStyles => ({
-      ...defaultStyles,
-      padding: 0
-    }),
-    option: (defaultStyles, { isSelected }) => ({
-      ...defaultStyles,
-      padding: '0.25rem 0.75rem',
-      fontSize: '0.875rem',
-      lineHeight: '1.25rem',
-      backgroundColor: isSelected ? APP_COLORS.bgSelected : defaultStyles.backgroundColor,
-      color: isSelected ? APP_COLORS.fgSelected : defaultStyles.color,
-      borderWidth: '1px',
-      borderColor: APP_COLORS.border
-    }),
-    input: defaultStyles => ({ ...defaultStyles }),
-    placeholder: defaultStyles => ({ ...defaultStyles }),
-    singleValue: defaultStyles => ({ ...defaultStyles }),
-    dropdownIndicator: base => ({
-      ...base,
-      paddingTop: 0,
-      paddingBottom: 0
-    }),
-    clearIndicator: base => ({
-      ...base,
-      paddingTop: 0,
-      paddingBottom: 0
-    })
-  };
-
-  return (
-    <Select
-      noOptionsMessage={() => 'Список пуст'}
-      components={{ DropdownIndicator, ClearIndicator }}
-      theme={theme => ({
-        ...theme,
-        borderRadius: 0,
-        spacing: {
-          ...theme.spacing,
-          baseUnit: size.isSmall ? 2 : 4,
-          menuGutter: 2,
-          controlHeight: size.isSmall ? 28 : 38
-        },
-        colors: {
-          ...theme.colors,
-          ...SELECT_THEME
-        }
-      })}
-      menuPortalTarget={!noPortal ? document.body : null}
-      styles={adjustedStyles}
-      classNames={{ container: () => 'focus-frame' }}
-      {...restProps}
-    />
-  );
-}
diff --git a/rsconcept/frontend/src/components/ui/button.tsx b/rsconcept/frontend/src/components/ui/button.tsx
index 12c6ec93..5c00bb3c 100644
--- a/rsconcept/frontend/src/components/ui/button.tsx
+++ b/rsconcept/frontend/src/components/ui/button.tsx
@@ -1,4 +1,3 @@
-import * as React from 'react';
 import { Slot } from '@radix-ui/react-slot';
 import { cva, type VariantProps } from 'class-variance-authority';
 
diff --git a/rsconcept/frontend/src/components/ui/combo-box.tsx b/rsconcept/frontend/src/components/ui/combo-box.tsx
new file mode 100644
index 00000000..4738c1c6
--- /dev/null
+++ b/rsconcept/frontend/src/components/ui/combo-box.tsx
@@ -0,0 +1,128 @@
+'use client';
+
+import { useEffect, useRef, useState } from 'react';
+import { ChevronDownIcon } from 'lucide-react';
+
+import { cn } from '@/lib/utils';
+
+import { MiniButton } from '../control';
+import { IconRemove } from '../icons';
+import { type Styling } from '../props';
+
+import { Button } from './button';
+import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from './command';
+import { Popover, PopoverContent, PopoverTrigger } from './popover';
+
+interface ComboBoxProps<Option> extends Styling {
+  id?: string;
+  items?: Option[];
+  value: Option | null;
+  onChange: (newValue: Option | null) => void;
+
+  idFunc: (item: Option) => string;
+  labelValueFunc: (item: Option) => string;
+  labelOptionFunc: (item: Option) => string;
+
+  placeholder?: string;
+  hidden?: boolean;
+  noBorder?: boolean;
+  clearable?: boolean;
+  noSearch?: boolean;
+}
+
+/**
+ * Displays a combo-select component.
+ */
+export function ComboBox<Option>({
+  id,
+  items,
+  value,
+  onChange,
+  labelValueFunc,
+  labelOptionFunc,
+  idFunc,
+  noBorder,
+  placeholder,
+  className,
+  style,
+  hidden,
+  clearable,
+  noSearch
+}: ComboBoxProps<Option>) {
+  const [open, setOpen] = useState(false);
+  const [popoverWidth, setPopoverWidth] = useState<number | undefined>(undefined);
+  const triggerRef = useRef<HTMLButtonElement>(null);
+
+  useEffect(() => {
+    if (triggerRef.current) {
+      setPopoverWidth(triggerRef.current.offsetWidth);
+    }
+  }, [open]);
+
+  function handleChangeValue(newValue: Option | null) {
+    onChange(newValue);
+    setOpen(false);
+  }
+
+  function handleClear(event: React.MouseEvent<HTMLButtonElement>) {
+    event.stopPropagation();
+    handleChangeValue(null);
+  }
+
+  return (
+    <Popover open={open} onOpenChange={setOpen}>
+      <PopoverTrigger asChild>
+        <Button
+          id={id}
+          ref={triggerRef}
+          variant='ghost'
+          role='combobox'
+          aria-expanded={open}
+          className={cn(
+            'relative justify-between font-normal bg-input hover:bg-input',
+            open && 'cursor-auto',
+            !noBorder && 'border',
+            noBorder && 'rounded-md',
+            !value && 'text-muted-foreground hover:text-muted-foreground',
+            className
+          )}
+          style={style}
+          hidden={hidden && !open}
+        >
+          <span className='truncate'>{value ? labelValueFunc(value) : placeholder}</span>
+          <ChevronDownIcon className={cn('text-muted-foreground', clearable && !!value && 'opacity-0')} />
+          {clearable && !!value ? (
+            <MiniButton
+              noHover
+              title='Очистить'
+              aria-label='Очистить'
+              className='absolute right-2 text-muted-foreground hover:text-warn-600'
+              icon={<IconRemove size='1rem' />}
+              onClick={handleClear}
+            />
+          ) : null}
+        </Button>
+      </PopoverTrigger>
+      <PopoverContent sideOffset={-1} className='p-0' style={{ width: popoverWidth }}>
+        <Command>
+          {!noSearch ? <CommandInput placeholder='Поиск...' className='h-9' /> : null}
+          <CommandList>
+            <CommandEmpty>Список пуст</CommandEmpty>
+            <CommandGroup>
+              {items?.map(item => (
+                <CommandItem
+                  key={idFunc(item)}
+                  value={labelOptionFunc(item)}
+                  onSelect={() => handleChangeValue(item)}
+                  className={cn(value === item && 'bg-selected text-selected-foreground')}
+                >
+                  {labelOptionFunc(item)}
+                </CommandItem>
+              ))}
+            </CommandGroup>
+          </CommandList>
+        </Command>
+      </PopoverContent>
+    </Popover>
+  );
+}
diff --git a/rsconcept/frontend/src/components/ui/command.tsx b/rsconcept/frontend/src/components/ui/command.tsx
index 12d1c774..f5692e90 100644
--- a/rsconcept/frontend/src/components/ui/command.tsx
+++ b/rsconcept/frontend/src/components/ui/command.tsx
@@ -1,4 +1,3 @@
-import * as React from 'react';
 import { Command as CommandPrimitive } from 'cmdk';
 import { SearchIcon } from 'lucide-react';
 
diff --git a/rsconcept/frontend/src/components/ui/dialog.tsx b/rsconcept/frontend/src/components/ui/dialog.tsx
index bf28d3d6..98b0d8ce 100644
--- a/rsconcept/frontend/src/components/ui/dialog.tsx
+++ b/rsconcept/frontend/src/components/ui/dialog.tsx
@@ -1,6 +1,5 @@
 'use client';
 
-import * as React from 'react';
 import * as DialogPrimitive from '@radix-ui/react-dialog';
 import { XIcon } from 'lucide-react';
 
diff --git a/rsconcept/frontend/src/components/ui/popover.tsx b/rsconcept/frontend/src/components/ui/popover.tsx
index d5bb241a..0a586ca1 100644
--- a/rsconcept/frontend/src/components/ui/popover.tsx
+++ b/rsconcept/frontend/src/components/ui/popover.tsx
@@ -1,4 +1,3 @@
-import * as React from 'react';
 import * as PopoverPrimitive from '@radix-ui/react-popover';
 
 import { cn } from '@/lib/utils';
diff --git a/rsconcept/frontend/src/components/ui/select.tsx b/rsconcept/frontend/src/components/ui/select.tsx
index 8931918f..f5163bec 100644
--- a/rsconcept/frontend/src/components/ui/select.tsx
+++ b/rsconcept/frontend/src/components/ui/select.tsx
@@ -1,6 +1,7 @@
-import * as React from 'react';
+'use client';
+
 import * as SelectPrimitive from '@radix-ui/react-select';
-import { CheckIcon, ChevronDownIcon, ChevronUpIcon } from 'lucide-react';
+import { ChevronDownIcon, ChevronUpIcon } from 'lucide-react';
 
 import { cn } from '@/lib/utils';
 
@@ -114,15 +115,11 @@ function SelectItem({ className, children, ...props }: React.ComponentProps<type
         'outline-none focus:bg-accent focus:text-accent-foreground',
         '*:[span]:last:flex *:[span]:last:items-center *:[span]:last:gap-2',
         "[&_svg:not([class*='text-'])]:text-muted-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        "data-[state='checked']:not-[:hover]:bg-selected data-[state='checked']:not-[:hover]:text-selected-foreground",
         className
       )}
       {...props}
     >
-      <span className='absolute right-2 flex size-3.5 items-center justify-center'>
-        <SelectPrimitive.ItemIndicator>
-          <CheckIcon className='size-4' />
-        </SelectPrimitive.ItemIndicator>
-      </span>
       <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
     </SelectPrimitive.Item>
   );
diff --git a/rsconcept/frontend/src/features/library/components/editor-library-item.tsx b/rsconcept/frontend/src/features/library/components/editor-library-item.tsx
index 1e363dc1..29372c34 100644
--- a/rsconcept/frontend/src/features/library/components/editor-library-item.tsx
+++ b/rsconcept/frontend/src/features/library/components/editor-library-item.tsx
@@ -102,11 +102,13 @@ export function EditorLibraryItem({ schema, isAttachedToOSS }: EditorLibraryItem
       </div>
 
       <div className='relative' ref={ownerSelector.ref} onBlur={ownerSelector.handleBlur}>
-        {ownerSelector.isOpen ? (
-          <div className='absolute -top-2 right-0'>
-            <SelectUser className='w-100 text-sm' value={schema.owner} onChange={onSelectUser} />
-          </div>
-        ) : null}
+        <SelectUser
+          className='absolute -top-2 right-0 w-100 text-sm'
+          value={schema.owner}
+          onChange={user => user && onSelectUser(user)}
+          hidden={!ownerSelector.isOpen}
+        />
+
         <ValueIcon
           className='sm:mb-1'
           icon={<IconOwner size='1.25rem' className='icon-primary' />}
diff --git a/rsconcept/frontend/src/features/library/components/select-library-item.tsx b/rsconcept/frontend/src/features/library/components/select-library-item.tsx
index 09383f16..3eab73e0 100644
--- a/rsconcept/frontend/src/features/library/components/select-library-item.tsx
+++ b/rsconcept/frontend/src/features/library/components/select-library-item.tsx
@@ -1,7 +1,5 @@
-'use client';
-
 import { type Styling } from '@/components/props';
-import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { ComboBox } from '@/components/ui/combo-box';
 
 import { type ILibraryItem } from '../backend/types';
 
@@ -15,31 +13,15 @@ interface SelectLibraryItemProps extends Styling {
   noBorder?: boolean;
 }
 
-export function SelectLibraryItem({
-  id,
-  items,
-  value,
-  onChange,
-  placeholder = 'Выберите схему',
-  ...restProps
-}: SelectLibraryItemProps) {
-  function handleSelect(newValue: string) {
-    const newItem = items?.find(item => item.id === Number(newValue)) ?? null;
-    onChange(newItem);
-  }
-
+export function SelectLibraryItem({ items, placeholder = 'Выберите схему', ...restProps }: SelectLibraryItemProps) {
   return (
-    <Select onValueChange={handleSelect} defaultValue={value ? String(value.id) : undefined}>
-      <SelectTrigger id={id} {...restProps}>
-        <SelectValue placeholder={placeholder} />
-      </SelectTrigger>
-      <SelectContent className='max-w-80'>
-        {items?.map(item => (
-          <SelectItem key={`${id ?? 'default'}-item-select-${item.id}`} value={String(item.id)}>
-            {`${item.alias}: ${item.title}`}
-          </SelectItem>
-        ))}
-      </SelectContent>
-    </Select>
+    <ComboBox
+      items={items}
+      placeholder={placeholder}
+      idFunc={item => String(item.id)}
+      labelValueFunc={item => `${item.alias}: ${item.title}`}
+      labelOptionFunc={item => `${item.alias}: ${item.title}`}
+      {...restProps}
+    />
   );
 }
diff --git a/rsconcept/frontend/src/features/library/dialogs/dlg-edit-editors/dlg-edit-editors.tsx b/rsconcept/frontend/src/features/library/dialogs/dlg-edit-editors/dlg-edit-editors.tsx
index 94511115..5becf26a 100644
--- a/rsconcept/frontend/src/features/library/dialogs/dlg-edit-editors/dlg-edit-editors.tsx
+++ b/rsconcept/frontend/src/features/library/dialogs/dlg-edit-editors/dlg-edit-editors.tsx
@@ -63,7 +63,8 @@ export function DlgEditEditors() {
         <SelectUser
           filter={id => !selected.includes(id)} //
           value={null}
-          onChange={onAddEditor}
+          noAnonymous
+          onChange={user => user && onAddEditor(user)}
           className='w-100'
         />
       </div>
diff --git a/rsconcept/frontend/src/features/library/pages/library-page/toolbar-search.tsx b/rsconcept/frontend/src/features/library/pages/library-page/toolbar-search.tsx
index 81b89d74..f84b4998 100644
--- a/rsconcept/frontend/src/features/library/pages/library-page/toolbar-search.tsx
+++ b/rsconcept/frontend/src/features/library/pages/library-page/toolbar-search.tsx
@@ -112,7 +112,7 @@ export function ToolbarSearch({ className, total, filtered }: ToolbarSearchProps
               aria-label='Выбор пользователя для фильтра по владельцу'
               placeholder='Выберите владельца'
               noBorder
-              className='min-w-60 text-sm mx-1 mb-1'
+              className='min-w-60 mx-1 mb-1'
               value={filterUser}
               onChange={setFilterUser}
             />
diff --git a/rsconcept/frontend/src/features/oss/components/select-operation.tsx b/rsconcept/frontend/src/features/oss/components/select-operation.tsx
index 92e81f59..28289c08 100644
--- a/rsconcept/frontend/src/features/oss/components/select-operation.tsx
+++ b/rsconcept/frontend/src/features/oss/components/select-operation.tsx
@@ -1,49 +1,27 @@
-'use client';
-
-import clsx from 'clsx';
-
-import { SelectSingle } from '@/components/input';
 import { type Styling } from '@/components/props';
+import { ComboBox } from '@/components/ui/combo-box';
 
 import { type IOperation } from '../models/oss';
-import { matchOperation } from '../models/oss-api';
 
 interface SelectOperationProps extends Styling {
+  id?: string;
   value: IOperation | null;
   onChange: (newValue: IOperation | null) => void;
 
   items?: IOperation[];
   placeholder?: string;
   noBorder?: boolean;
+  popoverClassname?: string;
 }
 
-export function SelectOperation({
-  className,
-  items,
-  value,
-  onChange,
-  placeholder = 'Выберите операцию',
-  ...restProps
-}: SelectOperationProps) {
-  const options =
-    items?.map(cst => ({
-      value: cst.id,
-      label: `${cst.alias}: ${cst.title}`
-    })) ?? [];
-
-  function filter(option: { value: string | undefined; label: string }, query: string) {
-    const operation = items?.find(item => item.id === Number(option.value));
-    return !operation ? false : matchOperation(operation, query);
-  }
-
+export function SelectOperation({ items, placeholder = 'Выберите операцию', ...restProps }: SelectOperationProps) {
   return (
-    <SelectSingle
-      className={clsx('text-ellipsis', className)}
-      options={options}
-      value={value ? { value: value.id, label: `${value.alias}: ${value.title}` } : null}
-      onChange={data => onChange(items?.find(cst => cst.id === data?.value) ?? null)}
-      filterOption={filter}
+    <ComboBox
+      items={items}
       placeholder={placeholder}
+      idFunc={operation => String(operation.id)}
+      labelValueFunc={operation => `${operation.alias}: ${operation.title}`}
+      labelOptionFunc={operation => `${operation.alias}: ${operation.title}`}
       {...restProps}
     />
   );
diff --git a/rsconcept/frontend/src/features/oss/models/oss-api.ts b/rsconcept/frontend/src/features/oss/models/oss-api.ts
index 4ee4cf40..481c1f41 100644
--- a/rsconcept/frontend/src/features/oss/models/oss-api.ts
+++ b/rsconcept/frontend/src/features/oss/models/oss-api.ts
@@ -20,13 +20,12 @@ import {
 } from '@/features/rsform/models/rslang-api';
 
 import { infoMsg } from '@/utils/labels';
-import { TextMatcher } from '@/utils/utils';
 
 import { Graph } from '../../../models/graph';
 import { type IOssLayout } from '../backend/types';
 import { describeSubstitutionError } from '../labels';
 
-import { type IOperation, type IOperationSchema, SubstitutionErrorType } from './oss';
+import { type IOperationSchema, SubstitutionErrorType } from './oss';
 import { type Position2D } from './oss-layout';
 
 export const GRID_SIZE = 10; // pixels - size of OSS grid
@@ -36,17 +35,6 @@ const DISTANCE_Y = 100; // pixels - insert y-distance between node centers
 
 const STARTING_SUB_INDEX = 900; // max semantic index for starting substitution
 
-/**
- * Checks if a given target {@link IOperation} matches the specified query using.
- *
- * @param target - The target object to be matched.
- * @param query - The query string used for matching.
- */
-export function matchOperation(target: IOperation, query: string): boolean {
-  const matcher = new TextMatcher(query);
-  return matcher.test(target.alias) || matcher.test(target.title);
-}
-
 /**
  * Sorts library items relevant for the specified {@link IOperationSchema}.
  */
diff --git a/rsconcept/frontend/src/features/rsform/components/select-constituenta.tsx b/rsconcept/frontend/src/features/rsform/components/select-constituenta.tsx
index 639c0e0c..ed47e7d3 100644
--- a/rsconcept/frontend/src/features/rsform/components/select-constituenta.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/select-constituenta.tsx
@@ -1,11 +1,10 @@
-import { ComboBox } from '@/components/input/combo-box';
+import { ComboBox } from '@/components/ui/combo-box';
 
 import { describeConstituenta, describeConstituentaTerm } from '../labels';
 import { type IConstituenta } from '../models/rsform';
-import { matchConstituenta } from '../models/rsform-api';
-import { CstMatchMode } from '../stores/cst-search';
 
 interface SelectConstituentaProps {
+  id?: string;
   value: IConstituenta | null;
   onChange: (newValue: IConstituenta | null) => void;
 
@@ -24,7 +23,6 @@ export function SelectConstituenta({
     <ComboBox
       items={items}
       placeholder={placeholder}
-      filterFunc={(item, query) => matchConstituenta(item, query, CstMatchMode.ALL)}
       idFunc={cst => String(cst.id)}
       labelValueFunc={cst => `${cst.alias}: ${describeConstituentaTerm(cst)}`}
       labelOptionFunc={cst => `${cst.alias}${cst.is_inherited ? '*' : ''}: ${describeConstituenta(cst)}`}
diff --git a/rsconcept/frontend/src/features/rsform/components/select-multi-grammeme.tsx b/rsconcept/frontend/src/features/rsform/components/select-multi-grammeme.tsx
index 6f0c2ff7..4a680eb9 100644
--- a/rsconcept/frontend/src/features/rsform/components/select-multi-grammeme.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/select-multi-grammeme.tsx
@@ -20,6 +20,7 @@ export function SelectMultiGrammeme({ value, onChange, ...restProps }: SelectMul
     <SelectMulti
       options={options}
       value={value}
+      isSearchable={false}
       onChange={newValue => onChange([...newValue].sort((left, right) => grammemeCompare(left.value, right.value)))}
       {...restProps}
     />
diff --git a/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/tab-template.tsx b/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/tab-template.tsx
index 591c9247..830478e4 100644
--- a/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/tab-template.tsx
+++ b/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/tab-template.tsx
@@ -2,7 +2,8 @@
 
 import { useTemplatesSuspense } from '@/features/library/backend/use-templates';
 
-import { SelectSingle, TextArea } from '@/components/input';
+import { TextArea } from '@/components/input';
+import { ComboBox } from '@/components/ui/combo-box';
 
 import { useRSForm } from '../../backend/use-rsform';
 import { PickConstituenta } from '../../components/pick-constituenta';
@@ -24,6 +25,7 @@ export function TabTemplate() {
 
   const { templates } = useTemplatesSuspense();
   const { schema: templateSchema } = useRSForm({ itemID: templateID ?? undefined });
+  const selectedTemplate = templates.find(item => item.id === templateID);
 
   if (!templateID) {
     onChangeTemplateID(templates[0].id);
@@ -40,47 +42,37 @@ export function TabTemplate() {
     ? ''
     : `${prototype?.term_raw}${prototype?.definition_raw ? ` — ${prototype?.definition_raw}` : ''}`;
 
-  const templateSelector = templates.map(template => ({
-    value: template.id,
-    label: template.title
-  }));
-
-  const categorySelector: { value: number; label: string }[] = !templateSchema
+  const categorySelector = !templateSchema
     ? []
-    : templateSchema.items
-        .filter(cst => cst.cst_type === CATEGORY_CST_TYPE)
-        .map(cst => ({
-          value: cst.id,
-          label: cst.term_raw
-        }));
+    : templateSchema.items.filter(cst => cst.cst_type === CATEGORY_CST_TYPE);
 
   return (
     <div className='cc-fade-in'>
-      <div className='flex border-t border-x rounded-t-md clr-input'>
-        <SelectSingle
+      <div className='flex gap-1 border-t border-x rounded-t-md clr-input'>
+        <ComboBox
+          value={selectedTemplate ?? null}
+          items={templates}
           noBorder
+          noSearch
           placeholder='Источник'
           className='w-48'
-          options={templateSelector}
-          value={templateID ? { value: templateID, label: templates.find(item => item.id == templateID)!.title } : null}
-          onChange={data => onChangeTemplateID(data ? data.value : null)}
+          idFunc={item => String(item.id)}
+          labelValueFunc={item => item.title}
+          labelOptionFunc={item => item.title}
+          onChange={item => onChangeTemplateID(item?.id ?? null)}
         />
-        <SelectSingle
+        <ComboBox
+          value={filterCategory}
+          items={categorySelector}
           noBorder
-          isSearchable={false}
+          noSearch
+          clearable
           placeholder='Выберите категорию'
-          className='grow ml-1 border-none'
-          options={categorySelector}
-          value={
-            filterCategory && templateSchema
-              ? {
-                  value: filterCategory.id,
-                  label: filterCategory.term_raw
-                }
-              : null
-          }
-          onChange={data => onChangeFilterCategory(data ? templateSchema?.cstByID.get(data?.value) ?? null : null)}
-          isClearable
+          className='grow'
+          idFunc={cst => String(cst.id)}
+          labelValueFunc={cst => cst.term_raw}
+          labelOptionFunc={cst => cst.term_raw}
+          onChange={cst => onChangeFilterCategory(cst)}
         />
       </div>
       <PickConstituenta
diff --git a/rsconcept/frontend/src/features/users/components/select-user.tsx b/rsconcept/frontend/src/features/users/components/select-user.tsx
index d17e123c..2d4f0f02 100644
--- a/rsconcept/frontend/src/features/users/components/select-user.tsx
+++ b/rsconcept/frontend/src/features/users/components/select-user.tsx
@@ -1,22 +1,21 @@
 'use client';
 
-import clsx from 'clsx';
-
-import { SelectSingle } from '@/components/input';
 import { type Styling } from '@/components/props';
+import { ComboBox } from '@/components/ui/combo-box';
 
 import { type IUserInfo } from '../backend/types';
 import { useLabelUser } from '../backend/use-label-user';
 import { useUsers } from '../backend/use-users';
-import { matchUser } from '../models/user-api';
 
 interface SelectUserProps extends Styling {
   value: number | null;
-  onChange: (newValue: number) => void;
+  onChange: (newValue: number | null) => void;
   filter?: (userID: number) => boolean;
 
   placeholder?: string;
   noBorder?: boolean;
+  noAnonymous?: boolean;
+  hidden?: boolean;
 }
 
 function compareUsers(a: IUserInfo, b: IUserInfo) {
@@ -33,10 +32,8 @@ function compareUsers(a: IUserInfo, b: IUserInfo) {
 }
 
 export function SelectUser({
-  className,
   filter,
-  value,
-  onChange,
+  noAnonymous,
   placeholder = 'Выберите пользователя',
   ...restProps
 }: SelectUserProps) {
@@ -46,28 +43,16 @@ export function SelectUser({
   const items = filter ? users.filter(user => filter(user.id)) : users;
   const sorted = [
     ...items.filter(user => !!user.first_name || !!user.last_name).sort(compareUsers),
-    ...items.filter(user => !user.first_name && !user.last_name)
-  ];
-  const options = sorted.map(user => ({
-    value: user.id,
-    label: getUserLabel(user.id)
-  }));
-
-  function filterLabel(option: { value: string | undefined; label: string }, query: string) {
-    const user = items.find(item => item.id === Number(option.value));
-    return !user ? false : matchUser(user, query);
-  }
+    ...(!noAnonymous ? items.filter(user => !user.first_name && !user.last_name) : [])
+  ].map(user => user.id);
 
   return (
-    <SelectSingle
-      className={clsx('text-ellipsis', className)}
-      options={options}
-      value={value ? { value: value, label: getUserLabel(value) } : null}
-      onChange={data => {
-        if (data?.value !== undefined) onChange(data.value);
-      }}
-      filterOption={filterLabel}
+    <ComboBox
+      items={sorted}
       placeholder={placeholder}
+      idFunc={user => String(user)}
+      labelValueFunc={user => getUserLabel(user)}
+      labelOptionFunc={user => getUserLabel(user)}
       {...restProps}
     />
   );
diff --git a/rsconcept/frontend/src/features/users/models/user-api.ts b/rsconcept/frontend/src/features/users/models/user-api.ts
deleted file mode 100644
index daf5ddcb..00000000
--- a/rsconcept/frontend/src/features/users/models/user-api.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * Module: API for formal representation for Users.
- */
-
-import { TextMatcher } from '@/utils/utils';
-
-import { type IUserInfo } from '../backend/types';
-
-/**
- * Checks if a given target {@link IConstituenta} matches the specified query using the provided matching mode.
- *
- * @param target - The target object to be matched.
- * @param query - The query string used for matching.
- * @param mode - The matching mode to determine which properties to include in the matching process.
- */
-export function matchUser(target: IUserInfo, query: string): boolean {
-  const matcher = new TextMatcher(query);
-  return matcher.test(target.last_name) || matcher.test(target.first_name);
-}
diff --git a/rsconcept/frontend/src/index.css b/rsconcept/frontend/src/index.css
index 62ce947e..484512f6 100644
--- a/rsconcept/frontend/src/index.css
+++ b/rsconcept/frontend/src/index.css
@@ -26,6 +26,21 @@
   outline: 2px solid hotpink !important;
 } */
 
+:root {
+  /* --radius: 0.625rem; */
+  --primary: oklch(20.5% 0 0deg);
+  --primary-foreground: oklch(98.5% 0 0deg);
+  --secondary: oklch(97% 0 0deg);
+  --secondary-foreground: oklch(20.5% 0 0deg);
+}
+
+.dark {
+  --primary: oklch(92.2% 0 0deg);
+  --primary-foreground: oklch(20.5% 0 0deg);
+  --secondary: oklch(26.9% 0 0deg);
+  --secondary-foreground: oklch(98.5% 0 0deg);
+}
+
 @theme inline {
   /* stylelint-disable-next-line custom-property-pattern */
   --color-*: initial;
@@ -54,6 +69,9 @@
 
   --color-ok-600: var(--clr-ok-600);
 
+  --color-selected: var(--clr-sec-200);
+  --color-selected-foreground: var(--clr-prim-999);
+
   /* stylelint-disable-next-line custom-property-pattern */
   --z-index-*: initial;
   --z-index-bottom: 0;
@@ -80,38 +98,9 @@
   --duration-fade: 300ms;
   --duration-dropdown: 200ms;
   --duration-select: 100ms;
-}
 
-/* ========= shadcn theme ============ */
+  /* ========= shadcn theme ============ */
 
-:root {
-  /* --radius: 0.625rem; */
-  --primary: oklch(20.5% 0 0deg);
-  --primary-foreground: oklch(98.5% 0 0deg);
-  --secondary: oklch(97% 0 0deg);
-  --secondary-foreground: oklch(20.5% 0 0deg);
-
-  --chart-1: oklch(64.6% 0.222 41.116deg);
-  --chart-2: oklch(60% 0.118 184.704deg);
-  --chart-3: oklch(39.8% 0.07 227.392deg);
-  --chart-4: oklch(82.8% 0.189 84.429deg);
-  --chart-5: oklch(76.9% 0.188 70.08deg);
-}
-
-.dark {
-  --primary: oklch(92.2% 0 0deg);
-  --primary-foreground: oklch(20.5% 0 0deg);
-  --secondary: oklch(26.9% 0 0deg);
-  --secondary-foreground: oklch(98.5% 0 0deg);
-
-  --chart-1: oklch(48.8% 0.243 264.376deg);
-  --chart-2: oklch(69.6% 0.17 162.48deg);
-  --chart-3: oklch(76.9% 0.188 70.08deg);
-  --chart-4: oklch(62.7% 0.265 303.9deg);
-  --chart-5: oklch(64.5% 0.246 16.439deg);
-}
-
-@theme inline {
   /* --radius-sm: calc(var(--radius) - 4px);
   --radius-md: calc(var(--radius) - 2px);
   --radius-lg: var(--radius);