Release v3.5.3

What's Changed

• fix(browser panel): mint one token per lifetime, and stop polling when the browser is gone by @chelojimenez in #4940
• fix(clipboard): stop toasting a copy that never happened (BB-215) by @nachocossio in #4947
• Simplify GitHub check OAuth setup by @ignaciojimenezr in #4942
• clarify Codex Desktop supports rendering by @kd-cool-coder in #4953
• Add a labelled exit to the scenario preview surface by @Paoli99 in #4951
• Changelog: "Back to study" preview exit by @mintlify[bot] in #4956
• Add first-visit local browser onboarding to Playground by @chelojimenez in #4957
• Document local browser onboarding dialog in Playground by @mintlify[bot] in #4958

Full Changelog: v3.5.2...v3.5.3