Update web content to release v1.3.21

[huchenlei]

Changelog

Features

• Added always snap to grid setting (#1177)
• Added group node commands/keybindings (#1208)
• Added help menu on command menu bar (#1197)
• Added support for VHS video outputs and advanced preview in queue sidebar (#1174, #1183)
• Added Russian localization (#1214, #1218)
• Show queue front icon when shift is pressed (#1157)
• Show sidebar toggle keybinding shortcut on sidebar icon tooltip (#1160)

Bug Fixes

• Fixed create group node command error states (#1209)
• Fixed dialog header component error (#1221)
• Fixed load workflow with converted widget (#1222)
• Fixed node def handling of undefined fields (#1199)
• Fixed pan mode icon display (#1173)
• Fixed sidebar scrollpanel style (#1283)
• Fixed sidebar tab bg color (#1229)
• Fixed VHS advanced preview html video type (#1186)
• Handled missing extraPngInfo field in queue (#1223)
• Removed misleading console error on paste (#1282)

Misc

Performance & UI Improvements

• Anchored floating actionbar to closest side when resizing window (#1195)
• Made LGraphCanvas shallowReactive (#1169)
• Moved low priority init to idle task (#1192)
• Properly show empty folder in model sidebar tab (#1242)
• Removed question mark badge on folders in model library tree (#1205)
• Restyled dialog with scrollpanel (#1212)
• Simplified node tooltip lifecycle (#1162)
• Used scrollpanel in sidebar template (#1226)

Development Improvements

• Added aria labels to dialogs (#1167)
• Added tests on node multi-select (#1163)
• Added ts-strict-ignore plugin (#1235)
• Enabled various ts-strict implementations (#1236, #1238, #1241, #1269)
• Refactored core sidebar tab registration (#1158)
• Renamed ModelStore to ModelFolder (#1244)
• Updated litegraph with TypeScript implementations (#1206, #1213, #1225, #1281)
• Wrapped pragmatic dnd API with hooks (#1207)