v3.104.0-rc.0

✨ Features

• Add release announcement for the new room header (#12802). Contributed by @MidhunSureshR.
• Default the room header to on (#12803). Contributed by @MidhunSureshR.
• Update Thread Panel to match latest designs (#12797). Contributed by @t3chguy.
• Close any open modals on logout (#12777). Contributed by @dbkr.
• Iterate design of right panel empty state (#12796). Contributed by @t3chguy.
• Update styling of UserInfo right panel card (#12788). Contributed by @t3chguy.
• Accessibility: Add Landmark navigation (#12190). Contributed by @akirk.
• Let Element Call widget receive m.room.create (#12710). Contributed by @AndrewFerr.
• Let Element Call widget set session memberships (#12713). Contributed by @AndrewFerr.
• Update right panel base card styling to match Compound (#12768). Contributed by @t3chguy.
• Align widget_build_url_ignore_dm with call behaviour switch between 1:1 and Widget (#12760). Contributed by @t3chguy.
• Move integrations switch (#12733). Contributed by @dbkr.
• Element-R: Report events with withheld keys separately to Posthog. (#12755). Contributed by @richvdh.

🐛 Bug Fixes

• Test for lack of WebAssembly support (#12792). Contributed by @dbkr.
• Fix stray 'account' heading (#12791). Contributed by @dbkr.
• Add test for the unsupported browser screen (#12787). Contributed by @dbkr.
• Fix HTML export test (#12778). Contributed by @dbkr.
• Fix HTML export missing a bunch of Compound variables (#12774). Contributed by @t3chguy.
• Fix inability to change accent colour consistently in custom theming (#12772). Contributed by @t3chguy.
• Fix edge case of landing on 3pid email link with registration disabled (#12771). Contributed by @t3chguy.