fix: redact HPC username and remove hardcoded home paths

[stanfish06]

Closes #77
Closes #78

Changes

1. hpc/monitor_job.sh — use $USER instead of zyyu (info leak)

-  for jobid in $(squeue -u zyyu -h -o "%i"); do
+  for jobid in $(squeue -u "$USER" -h -o "%i"); do

zyyu was a hardcoded HPC username missed when PR #39/PR #50 cleaned ssh/config and hpc/ssh/config. Using $USER makes the script work for any account.

2. wezterm/.wezterm.lua — redact zyyu username (info leak)

-	username = "zyyu",
+	username = "username",
...
-		args = { "ssh", "zyyu@greatlakes.arc-ts.umich.edu" },
+		args = { "ssh", "username@greatlakes.arc-ts.umich.edu" },

Same redaction pattern as ssh/config (PR #50).

3. sway/40-sway-background.conf — stable wallpaper path (compatibility)

-output * bg /home/stanfish/Git/my-configs/img/space.jpeg fill
+output * bg ~/.config/sway/wallpaper.jpeg fill

Same pattern as PR #47 for i3. Wire up at deploy time:

ln -sf ~/Git/my-configs/img/space.jpeg ~/.config/sway/wallpaper.jpeg

4. linux/services/email.service — use %h specifier (compatibility)

-User=stanfish
-ExecStart=/home/stanfish/scripts/system/fetch-emails.sh
+# User=  # set locally: User=your-username
+ExecStart=%h/scripts/system/fetch-emails.sh

%h is the systemd home-directory specifier for the configured User=.

Test plan

• grep -r 'zyyu\|zyu14' hpc/monitor_job.sh wezterm/ — no matches
• grep -r 'home/stanfish' sway/ linux/services/ — no matches
• monitor_job.sh on HPC lists current user's jobs
• Sway starts with wallpaper after symlinking ~/.config/sway/wallpaper.jpeg

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https://claude.ai/code/session_01WgPdS4Zw5VcKhxYsuvCWXq

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Generated by Claude Code

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Resolve remote username dynamically for Great Lakes SSH

Replacing the real account with the literal string "username" makes both connection paths attempt to authenticate as a non-existent user unless someone manually edits the file, so the built-in Great Lakes entries stop working out of the box. To keep this portable without breaking connectivity, this should derive the username from environment/SSH config or omit it rather than hardcoding a placeholder account name.

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[chatgpt-codex-connector]

Preserve explicit service user in email unit

Commenting out User= changes this from an unprivileged user service to running as root in the system manager, which also changes %h to root’s home and makes ExecStart resolve under /root rather than the intended account. On hosts where the script is in a normal user home, this will fail to start and also broadens privileges unexpectedly.

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