fix: Atuin hangs when attempting to spawn daemon from Ctrl+R invocation

[BinaryMuse]

This PR fixes a shell hang when daemon autostart happens from the interactive search widget.

The bash/zsh/fish integrations run atuin search -i under command substitution and swap stdout/stderr so the TUI can draw to the terminal while the selected command is captured:

3>&1 1>&2 2>&3

This leaves fd 3 open in the atuin search process. If search autostarts the daemon, the spawned long-running atuin daemon start --daemonize inherits fd 3, the command-substitution pipe, so the shell keeps waiting for EOF until the daemon is killed.

The fix: close fd 3 after the swap in the non-tmux bash/zsh/fish paths:

3>&1 1>&2 2>&3 3>&-

Tested on zsh; I still need to confirm for bash and fish. Near as I can tell, the other shell integrations don't need this change.

Fixes #3499

[greptile-apps]

Greptile Summary

This PR fixes the interactive search daemon autostart hang. The main changes are:

• Closes fd 3 after stdout/stderr swapping in bash, zsh, and fish non-tmux search paths.
• Preserves and handles failed atuin search -i exits in shell widgets.
• Logs terminal cleanup failures from interactive search teardown instead of ignoring them.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.
• The fd close is limited to the command-substitution paths that create the extra descriptor.
• The error-handling changes avoid treating failure output as a selected command.

Important Files Changed

Filename	Overview
crates/atuin/src/shell/atuin.bash	Closes the extra command-substitution fd and avoids inserting captured error output.
crates/atuin/src/shell/atuin.zsh	Closes the extra command-substitution fd and returns early on failed search.
crates/atuin/src/shell/atuin.fish	Closes the extra fd in non-tmux paths and propagates search or popup failures.
crates/atuin/src/command/client/search/interactive.rs	Reports terminal cleanup errors through tracing during TUI teardown.

_{Reviews (1): Last reviewed commit: "clippy" | Re-trigger Greptile}