fix(cli): restart cli for manual update

[uinstinct]

Description

After running manual update with /update, the cli should automatically restart (just like in auto-update). This PR fixes that.

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• [] I've read the contributing guide
• [] The relevant docs, if any, have been updated or created
• [] The relevant tests, if any, have been updated or created

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Summary by cubic

Fixes manual update flow so the CLI restarts automatically after running /update, matching auto-update behavior. Simplifies update status messages for consistency.

• Bug Fixes
  • Always call restartCLI after a successful update (manual and auto).
  • Unified messages to “Updated to v{version}” and “Update failed”.

^{Written for commit 595986a. Summary will update automatically on new commits.}

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