Fix three code bugs

[Jehadalmaliki]

Fixes three bugs: untargeted chat messages, incorrect question editor redirect, and inaccurate wallet history.

The chat message controller now validates and explicitly stores receiver_id for all messages, resolving an issue where text messages lacked a target and couldn't be loaded in inbox views. The question editor's update redirect now points to the correct admin.question.index route, preventing a 404 error. Wallet history and balance calculations now correctly query transactions using the wallet_id instead of user_id, ensuring accurate financial data.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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