diff --git a/src/common/components/forms/FormNumberInput.tsx b/src/common/components/forms/FormNumberInput.tsx
new file mode 100644
index 000000000..9fcb3c910
--- /dev/null
+++ b/src/common/components/forms/FormNumberInput.tsx
@@ -0,0 +1,94 @@
+import * as React from 'react';
+
+import type { SxProps } from '@mui/joy/styles/types';
+import { Box, FormControl, IconButton, Input, Tooltip } from '@mui/joy';
+import ClearIcon from '@mui/icons-material/Clear';
+
+import { FormLabelStart } from './FormLabelStart';
+
+
+const _style = {
+  control: {
+    flexWrap: 'wrap',
+    justifyContent: 'space-between',
+    alignItems: 'center',
+  },
+  inputRow: {
+    display: 'flex',
+    alignItems: 'center',
+    gap: 0.5,
+  },
+} as const satisfies Record<string, SxProps>;
+
+
+/**
+ * Compact numeric input field with label and optional description.
+ * Supports undefined (unset/default) state with a toggle button:
+ * - undefined: input disabled, X button pressed (soft) — input shows empty
+ * - number: input active, X button flat (plain) — pressing X clears to undefined
+ */
+export function FormNumberInput(props: {
+  title: string,
+  description?: string,
+  tooltip?: string,
+  disabled?: boolean,
+  size?: 'sm' | 'md' | 'lg',
+  min?: number,
+  max?: number,
+  initialValue: number,
+  value: undefined | number,
+  onChange: (value: number | undefined) => void,
+  inputSx?: SxProps,
+}) {
+
+  const { onChange, min, max, initialValue } = props;
+  const isSet = props.value !== undefined;
+
+  const handleInputChange = React.useCallback((event: React.ChangeEvent<HTMLInputElement>) => {
+    const num = parseInt(event.target.value, 10);
+    if (!isNaN(num)) {
+      const clamped = Math.max(min ?? -Infinity, Math.min(max ?? Infinity, num));
+      onChange(clamped);
+    }
+  }, [max, min, onChange]);
+
+  const handleToggle = React.useCallback(() => {
+    if (isSet)
+      onChange(undefined);
+    else
+      onChange(initialValue);
+  }, [isSet, onChange, initialValue]);
+
+  return (
+    <FormControl size={props.size} disabled={props.disabled} orientation='horizontal' sx={_style.control}>
+      <FormLabelStart title={props.title} description={props.description} tooltip={props.tooltip} />
+      <Box sx={_style.inputRow}>
+        <Input
+          type='number'
+          size={props.size}
+          variant={isSet ? 'outlined' : 'plain'}
+          disabled={!isSet}
+          placeholder='unset'
+          slotProps={{
+            input: {
+              ...(min !== undefined ? { min } : {}),
+              ...(max !== undefined ? { max } : {}),
+            },
+          }}
+          value={isSet ? props.value : ''}
+          onChange={handleInputChange}
+          sx={props.inputSx}
+        />
+        <Tooltip arrow disableInteractive title={isSet ? 'Reset to default' : 'Customize'}>
+          <IconButton
+            size={props.size}
+            variant={isSet ? 'plain' : 'soft'}
+            onClick={handleToggle}
+          >
+            <ClearIcon sx={{ fontSize: props.size === 'sm' ? 'md' : 'lg' }} />
+          </IconButton>
+        </Tooltip>
+      </Box>
+    </FormControl>
+  );
+}