fix Sidebar.tsx

[parthikjadav]

fixed this issue #1109

Description

Changes proposed in this pull request:

The anchor link for a message in the sidebar does not work as expected when message.name() and message.id() differ.

Expected result
Clicking on a message in the sidebar should set the correct hash in the URL and scroll the message into view.

Actual result
The anchor link only works if message.name() and message.id() are identical.
If message.name() is not provided, the hash becomes #message-undefined.

before

after

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[sonarcloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)
B Maintainability Rating on New Code (required ≥ A)

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