v1.4.8-rc.0

What's Changed

• Fix E2E onboarding setup by @brennanb2025 in #2292
• Pin Linux package icon source explicitly by @muddlebee in #2241
• Close workspace delete dialog when delete starts by @nwparker in #2300
• Fix E2E completed onboarding profile for restarts by @brennanb2025 in #2299
• Support rich markdown diff review by @AmethystLiang in #2302
• Scope workspace metadata hover to attachment group by @nwparker in #2301
• Fix occasional PR checks fallback failure by @AmethystLiang in #2303

Full Changelog: v1.4.7...v1.4.8-rc.0