feat: add ConfirmDialog composite component

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

src/design-system/composites/ConfirmDialog/ConfirmDialog.module.css

@@ -0,0 +1,58 @@
+.content {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  padding: 4px 0;
+  font-family: var(--font-body);
+}
+
+.title {
+  font-size: 16px;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0;
+  line-height: 1.3;
+}
+
+.message {
+  font-size: 14px;
+  color: var(--text-secondary);
+  margin: 0;
+  line-height: 1.5;
+}
+
+.inputGroup {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.label {
+  font-size: 12px;
+  color: var(--text-secondary);
+}
+
+.input {
+  width: 100%;
+  padding: 6px 12px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--bg-raised);
+  color: var(--text-primary);
+  font-family: var(--font-body);
+  font-size: 12px;
+  outline: none;
+  transition: border-color 0.15s, box-shadow 0.15s;
+}
+
+.input:focus {
+  border-color: var(--amber);
+  box-shadow: 0 0 0 3px var(--amber-bg);
+}
+
+.buttonRow {
+  display: flex;
+  gap: 8px;
+  justify-content: flex-end;
+  margin-top: 4px;
+}

src/design-system/composites/ConfirmDialog/ConfirmDialog.tsx

@@ -0,0 +1,97 @@
+import { useState, useEffect, useRef } from 'react'
+import { Modal } from '../Modal/Modal'
+import { Button } from '../../primitives/Button/Button'
+import styles from './ConfirmDialog.module.css'
+
+export interface ConfirmDialogProps {
+  open: boolean
+  onClose: () => void
+  onConfirm: () => void
+  title?: string
+  message: string
+  confirmText: string
+  confirmLabel?: string
+  cancelLabel?: string
+  variant?: 'danger' | 'warning' | 'info'
+  loading?: boolean
+  className?: string
+}
+
+export function ConfirmDialog({
+  open,
+  onClose,
+  onConfirm,
+  title = 'Confirm Deletion',
+  message,
+  confirmText,
+  confirmLabel = 'Delete',
+  cancelLabel = 'Cancel',
+  variant = 'danger',
+  loading = false,
+  className,
+}: ConfirmDialogProps) {
+  const [input, setInput] = useState('')
+  const inputRef = useRef<HTMLInputElement>(null)
+  const matches = input === confirmText
+
+  useEffect(() => {
+    if (open) {
+      setInput('')
+      const id = setTimeout(() => inputRef.current?.focus(), 0)
+      return () => clearTimeout(id)
+    }
+  }, [open])
+
+  function handleKeyDown(e: React.KeyboardEvent) {
+    if (e.key === 'Enter' && matches && !loading) {
+      e.preventDefault()
+      onConfirm()
+    }
+  }
+
+  const confirmButtonVariant = variant === 'danger' ? 'danger' : 'primary'
+
+  return (
+    <Modal open={open} onClose={onClose} size="sm" className={className}>
+      <div className={styles.content}>
+        <h2 className={styles.title}>{title}</h2>
+        <p className={styles.message}>{message}</p>
+
+        <div className={styles.inputGroup}>
+          <label className={styles.label} htmlFor="confirm-input">
+            {`Type "${confirmText}" to confirm`}
+          </label>
+          <input
+            ref={inputRef}
+            id="confirm-input"
+            className={styles.input}
+            value={input}
+            onChange={(e) => setInput(e.target.value)}
+            onKeyDown={handleKeyDown}
+            autoComplete="off"
+          />
+        </div>
+
+        <div className={styles.buttonRow}>
+          <Button
+            variant="secondary"
+            onClick={onClose}
+            disabled={loading}
+            type="button"
+          >
+            {cancelLabel}
+          </Button>
+          <Button
+            variant={confirmButtonVariant}
+            onClick={onConfirm}
+            loading={loading}
+            disabled={!matches || loading}
+            type="button"
+          >
+            {confirmLabel}
+          </Button>
+        </div>
+      </div>
+    </Modal>
+  )
+}