v1.21.3

What's Changed

• Add copy url button by @jtydhr88 in #4000
• Fix dragging preview image does nothing by @webfiltered in #4009
• Allow extensions to raise their own Vue dialogs by @webfiltered in #4008
• Allow extensions to define pinia stores by @jtydhr88 in #4018
• [refactor] Refactor file handling by @christian-byrne in #3955
• [feat] Add logout button to user popover by @christian-byrne in #4022
• [docs] Add Claude command for adding missing i18n strings by @christian-byrne in #4023
• Add GH types to issue templates by @webfiltered in #3991
• Revert "Allow extensions to define pinia stores" by @webfiltered in #4027
• [fix] Remove dynamic import timing issue causing Playwright test flakiness by @christian-byrne in #4031
• [feat] Add node library sorting and grouping controls by @christian-byrne in #4024
• [Dev] Add Playwright MCP for Local Development by @christian-byrne in #4028
• 1.21.3 by @comfy-pr-bot in #4035

Full Changelog: v1.21.2...v1.21.3