アニメーション（#139） (#252)

#139

#139

#139

#139

#139

Merge branch 'feature/140' into feature/139

Merge remote-tracking branch 'origin/main' into feature/139

#140

Merge remote-tracking branch 'origin/main' into feature/140

Merge remote-tracking branch 'origin/main' into feature/140

#140 ぼちぼち

Merge remote-tracking branch 'origin/main' into feature/140

#140

#140

#140

#139 アニメーション

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #252

frontend/src/components/RouteBlockerOverlay.tsx

@@ -0,0 +1,46 @@
+import { useEffect } from 'react'
+import { create } from 'zustand'
+
+import type { FC } from 'react'
+
+type OverlayStore = {
+    active:     boolean
+    setActive:  (v: boolean) => void }
+
+
+export const useOverlayStore = create<OverlayStore> (set => ({
+    active:     false,
+    setActive:  v => set ({ active: v }) }))
+
+
+export default (() => {
+  const active = useOverlayStore (s => s.active)
+
+  useEffect (() => {
+    if (active)
+      {
+	document.body.style.overflow = 'hidden'
+	document.body.setAttribute ('aria-busy', 'true')
+      }
+    else
+      {
+	document.body.style.overflow = ''
+	document.body.removeAttribute ('aria-busy')
+      }
+  }, [active])
+
+  if (!(active))
+    return null
+
+  return (
+      <div
+	  role="progressbar"
+	  aria-label="Loading"
+	  className="fixed inset-0 z-[9999] bg-black/50 backdrop-blur-sm pointer-events-auto">
+	<div className="absolute inset-0 flex items-center justify-center">
+	  <div className="rounded-2xl bg-black/60 text-white px-6 py-3 text-sm">
+	    Loading...
+	  </div>
+	</div>
+      </div>)
+}) satisfies FC