fix(kyber): use ubuntu as default username

[shunkakinoki]

Summary

• Latitude.sh provisions Ubuntu images with ubuntu as the default system user
• Kyber host config was hardcoded to shunkakinoki, causing Home Manager activation to fail: USER is "ubuntu", expected "shunkakinoki"
• Updated both flake.nix and named-hosts/kyber/default.nix to use ubuntu

Test plan

• make build && make switch succeeds on kyber without USER override

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Summary by cubic

Set kyber’s default username to ubuntu to match Latitude.sh images and fix Home Manager activation failures.

• Bug Fixes
  • Updated flake.nix and named-hosts/kyber/default.nix to set username = "ubuntu".
  • Resolves the mismatch error: USER is "ubuntu", expected "shunkakinoki".

^{Written for commit 8fd2d35. Summary will update on new commits.}

[mesa-dot-dev]

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[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 3260d291-4f4d-48b2-b47a-09c1e9e73ee8

📥 Commits

Reviewing files that changed from the base of the PR and between d5c4a1a and 8fd2d35.

📒 Files selected for processing (2)

• flake.nix
• named-hosts/kyber/default.nix

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📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated system configuration defaults across named host configurations.

Walkthrough

The username configuration for the kyber host is updated from "shunkakinoki" to "ubuntu" across two related Nix files. The change affects both the main flake configuration and the kyber module's default parameter value.

Changes

Cohort / File(s)	Summary
Kyber Host Username Update flake.nix, named-hosts/kyber/default.nix	Updated username from "shunkakinoki" to "ubuntu" in both the homeConfigurations argument and the module parameter default, affecting derived paths and Home Manager configuration values.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• fix(paperclip): bind to 0.0.0.0 on kyber to fix k3s ingress 502 #1507 — Inverse configuration change that sets kyber username back to "shunkakinoki", indicating potential rollback or version switching scenarios.

Poem

🐰 A bunny hops through config files with glee,
Where "shunkakinoki" becomes "ubuntu" spree,
Two files, one purpose, so simple, so clean,
The kyber host shifts to a new username scene! 🌟

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/kyber-username

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[mesa-dot-dev]

Mesa Description

TL;DR

Fixed Kyber host configuration to use ubuntu as the default system user.

What changed?

• Updated flake.nix to use ubuntu as the default username for Kyber.
• Updated named-hosts/kyber/default.nix to use ubuntu as the default username for Kyber.

^{Description generated by Mesa. Update settings}

[gemini-code-assist]

Code Review

This pull request updates the username configuration for the 'kyber' host from 'shunkakinoki' to 'ubuntu' in both flake.nix and named-hosts/kyber/default.nix. I have no feedback to provide.