fix(backup): display service messages in chat view

[KPR-V]

Summary

This PR fixes issue #94 by making service messages (such as users joining, leaving, or group info changes) visible in the chat backup view. Previously, these events were backed up but not shown, resulting in incomplete chat histories.

Details

• Removes the filter that previously hid service messages.
• Renders service messages inline with chat history using a distinct, centered style.
• Adds a formatServiceMessage helper to convert raw action data into readable text
• Dynamically fetches user info for users referenced in service messages who are not already in the backup.
• Gracefully handles cases where user info cannot be fetched, displaying "A user" as needed.
• Skips rendering messages with unsupported media types.

Screenshots

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Fixes #94

[Khwahish29]

Hey @KPR-V great work! 🚀
I have reviewed the changes in the PR and it looks good to me @BravoNatalie

[KPR-V]

Hey @KPR-V great work! 🚀
I have reviewed the changes in the PR and it looks good to me @BravoNatalie

Thank you for the kind words and your time for reviewing my PR 😇 Greatly appreciate it

[jamiechicago312]

Flagging @travis or @BravoNatalie to review this PLDG PR for our TG mini app
Will post in Discord also

[BravoNatalie]

Thank you for the work, especially for mapping out that huge list of service actions!

I’ve already left some comments, but here’s a quick summary of what I think could be adjusted in this PR:

• Fix conflicts with main
• Remove all uses of getEntity
• For cases where we don’t know the participant’s username, handle them in a generic way. Just be mindful of the possibility of having multiple unknown users and account for plurals accordingly.

[KPR-V]

hi @travis and @BravoNatalie

I have made the requested changes and have removed all the use cases of the getEntity

[KPR-V]

Hi @travis, could you please take some time to review this PR? It would be greatly appreciated. 🙏👍😊
Also thank you @BravoNatalie for the approval😊