v1.15.7

What's Changed

• Sync main to dev by @aofei in #3398
• chore(deps): bump spx to 3.1.0 by @nighca in #3397
• feat: support project font persistence by @nighca in #3362
• fix(ai): handle interaction termination consistently by @aofei in #3399
• feat(account): add Firefox browser hijacking by @aofei in #3404
• fix(api): raise the course prompt limit to 12000 by @Ethanlita in #3408
• docs(product): add product design for the new tutorial course system by @Ethanlita in #3402
• fix(spx-gui): timeout pre-run static checks by @nighca in #3410
• fix(account): preserve client IP through trusted proxies by @aofei in #3389
• fix(editor): avoid quadratic input slot filtering by @aofei in #3415
• Release v1.15.7 by @aofei in #3426

Full Changelog: v1.15.6...v1.15.7