Merge remote-tracking branch 'misskey-original/develop' into develop

# Conflicts:
#	packages/backend/src/core/QueryService.ts
#	packages/backend/src/server/api/endpoints/drive/files/attached-notes.ts
#	packages/backend/src/server/api/endpoints/hashtags/users.ts
#	packages/backend/src/server/api/endpoints/notes/create.ts
#	packages/frontend/src/pages/emojis.emoji.vue

packages/frontend/src/scripts/device-kind.ts

@@ -11,6 +11,13 @@ const ua = navigator.userAgent.toLowerCase();
 const isTablet = /ipad/.test(ua) || (/mobile|iphone|android/.test(ua) && window.innerWidth > 700);
 const isSmartphone = !isTablet && /mobile|iphone|android/.test(ua);
 
+const isIPhone = /iphone|ipod/gi.test(ua) && navigator.maxTouchPoints > 1;
+// navigator.platform may be deprecated but this check is still required
+const isIPadOS = navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1;
+const isIos = /ipad|iphone|ipod/gi.test(ua) && navigator.maxTouchPoints > 1;
+
+export const isFullscreenNotSupported = isIPhone || isIos;
+
 export const deviceKind: 'smartphone' | 'tablet' | 'desktop' = defaultStore.state.overridedDeviceKind ? defaultStore.state.overridedDeviceKind
 	: isSmartphone ? 'smartphone'
 	: isTablet ? 'tablet'