fix: whiteboard reopening when toggling lobby after hiding whiteboard

[vishal2005025]

Summary

This PR fixes an issue where the whiteboard could reopen in the background after being hidden, when the moderator later toggled Lobby from Security options.

Problem

After the sequence:

1. Open Security and toggle Lobby (works),
2. Show Whiteboard, then hide Whiteboard (works),
3. Reopen Security and toggle Lobby,

the whiteboard reopened unexpectedly, even though the lobby action is unrelated.

Root Cause

Whiteboard middleware was reopening whiteboard on conference metadata updates whenever whiteboard metadata existed, even when that metadata was not new.
Lobby toggling can trigger metadata updates, which unintentionally retriggered whiteboard open.

Changed

Updated react/features/whiteboard/middleware.any.ts so whiteboard auto-open runs only when whiteboard collaboration details are new/changed (roomId/roomKey changed), instead of on every metadata refresh.

Before fix

before-lobby.mp4

After fix

after-lobby.mp4

Note:

This issue is reproducible on meet.jit.si

[vishal2005025]

@saghul @damencho @jallamsetty1 Please take a look and let me know if any changes are required.
Thanks!

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[saghul]

Just in case we ever introduce new stuff, use lodash's "equal" helper.

[vishal2005025]

@saghul Thanks for the review - I’ve updated the comparison to use lodash-es/isEqual so the comparison remains reliable if collabDetails evolves.
The behavior remains unchanged: it prevents the whiteboard from reopening on unrelated metadata updates while still allowing it when the details actually change.
Please take a look.

[vishal2005025]

@saghul The same issue also exists on Android, so this fix should cover Android as well.

Ci jobs: https://github.com/vishal2005025/jitsi-meet/actions/runs/22794105721

[vishal2005025]

@saghul @damencho @jallamsetty1 I noticed the same issue where after opening and hiding the whiteboard in a breakout room, leaving the breakout room could reopen it in the background. This happens because the room transition triggers a metadata refresh that is interpreted as a new whiteboard session.

I fixed this by adding a small room-switch guard in the shared whiteboard middleware so the first metadata-driven auto-open is skipped during breakout room transitions.

The previous behavior remains unchanged, and both issues are now resolved and working as expected.

Please take a look.
Thanks!