feat(ui): add Simple chat appearance

[clawdyagent]

Summary

Adds a device-scoped Simple chat appearance option for users who want a lighter conversation view without changing the default chat UI.

Changes

• Adds a chatStyle preference with Default and Simple options in Appearance settings.
• Applies Simple chat mode through data-chat-style="simple" so styling stays scoped to chat appearance.
• Adds Simple-mode chat CSS for user bubbles, assistant prose, simplified tool calls, and prompt controls.
• Adds localized Simple chat settings copy for supported locales.
• Documents the feature plan in docs/features/simple-ui/PLAN.md.

Validation

• npm run typecheck --workspace @codenomad/ui
• npm run build:ui

[github-actions]

PR builds are available as GitHub Actions artifacts:

https://github.com/NeuralNomadsAI/CodeNomad/actions/runs/26245533262

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Artifacts: (none found on this run)

[github-actions]

PR builds are available as GitHub Actions artifacts:

https://github.com/NeuralNomadsAI/CodeNomad/actions/runs/26245533262

Artifacts expire in 7 days.
Artifacts: (none found on this run)

[github-actions]

PR builds are available as GitHub Actions artifacts:

https://github.com/NeuralNomadsAI/CodeNomad/actions/runs/26245561165

Artifacts expire in 7 days.
Artifacts:

• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-tauri-linux
• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-tauri-macos
• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-tauri-windows
• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-electron-macos
• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-tauri-macos-arm64
• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-electron-windows
• pr-494-f2b32b8771bb59ecfe45f75f47a4e618dce4b5d8-electron-linux

[pascalandr]

@CodeNomadBot

I want you to perform the gatekeeper checks for latest PR state

check for regressions
check for better possible implementations
Be the PR gatekeeper
Be ruthless about code quality

[codenomadbot]

Gatekeeper review for latest PR state.

I understood the request as a ruthless review/validation pass only: look for regressions, incomplete implementation, and better implementation choices without changing code. No PR review comments existed beyond the issue thread.

Findings:

1. Blocking: the PR documents a required prompt send icon change but does not implement it.
   docs/features/simple-ui/PLAN.md:84 says the send fallback should be replaced with an up-arrow, and docs/features/simple-ui/PLAN.md:119 lists “Prompt send displays an up arrow” as acceptance criteria. The current code still renders the play triangle fallback at packages/ui/src/components/prompt-input.tsx:979. This leaves the feature internally inconsistent and misses one of its own acceptance criteria.

2. Blocking/docs-quality: the plan references prototype assets that are not present in the PR.
   docs/features/simple-ui/PLAN.md:7 and docs/features/simple-ui/PLAN.md:9 reference docs/features/simple-ui/simple-ui-prototype.png and .svg, and docs/features/simple-ui/PLAN.md:120 says the prototype PNG exists. The PR only contains PLAN.md under that directory, so these links are broken. Either add the assets or remove/adjust the references and acceptance criterion.

Quality notes:

• The preference plumbing is minimal and correctly defaults existing users to chatStyle: "default".
• The runtime scoping via data-chat-style="simple" is appropriately isolated from data-theme and should preserve the default UI when unset.
• The CSS is mostly well scoped under :root[data-chat-style="simple"], which is the right implementation direction for this feature.
• packages/ui/src/styles/appearance/simple-ui-layout.css is already ~194 lines. That is not a merge blocker, but it exceeds the repo’s preferred focused-style-file guideline; consider splitting prompt/message/tool-call overrides if this grows further.

Validation:

• git diff --check origin/dev...HEAD: passed.
• npm run typecheck --workspace @codenomad/ui: inconclusive in this local worktree because dependencies/types cannot be resolved, starting with solid-js and @opencode-ai/sdk/v2/client.
• npm run build:ui: inconclusive in this local worktree because Rollup’s optional native package @rollup/rollup-darwin-arm64 is missing from the installed dependencies.

Verdict: changes requested. The implementation direction is good, but the PR should not merge while its own documented acceptance criteria are unmet and the docs reference missing assets.

--
Yours,
CodeNomadBot

[pascalandr]

@CodeNomadBot
same review

[github-actions]

PR builds are available as GitHub Actions artifacts:

https://github.com/NeuralNomadsAI/CodeNomad/actions/runs/26472171308

Artifacts expire in 7 days.
Artifacts:

• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-electron-macos
• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-tauri-macos
• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-tauri-linux
• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-tauri-windows
• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-tauri-macos-arm64
• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-electron-windows
• pr-494-b10b8bbcf13a207540c59ff26490059d68c131cd-electron-linux

[codenomadbot]

Gatekeeper re-review for latest PR state.

I understood “same review” as rerunning the prior ruthless gatekeeper pass against the current PR head, not changing code. Latest head is b10b8bbc (docs(ui): align Simple chat plan with implementation). No inline PR review comments are present.

Findings:

• No blocking code findings found in this static re-review.
• The two previous blockers are addressed at the documentation level: the plan no longer requires the prompt send icon markup change, and it no longer references missing prototype PNG/SVG assets.

Quality notes:

• Preference plumbing remains minimal and safe: chatStyle defaults to "default", invalid persisted values normalize back to default, and the setter avoids redundant writes.
• The data-chat-style="simple" application is scoped and reversible, and it stays separate from data-theme, which is the right implementation direction.
• The CSS overrides are consistently scoped under :root[data-chat-style="simple"], so the default chat UI should remain unaffected when the attribute is absent.
• packages/ui/src/styles/appearance/simple-ui-layout.css is ~194 lines. Not a blocker, but it is already above the repo’s preferred focused-style-file guideline; split message/tool-call/prompt overrides if this grows further.
• Several non-English settings files still contain existing English strings around nearby settings keys; this PR does not make that worse for the new chat-style keys, which are translated, but locale completeness remains dependent on separate i18n cleanup.

Validation:

• git diff --check origin/dev...HEAD: passed.
• npm run typecheck --workspace @codenomad/ui: inconclusive in this local worktree because installed dependencies/types are missing, starting with solid-js and @opencode-ai/sdk/v2/client.
• npm run build:ui: inconclusive in this local worktree because Rollup’s optional native package @rollup/rollup-darwin-arm64 is missing.

Verdict: no static-review blocker found in the latest PR state. I would still require clean CI for typecheck/build before merge because local validation is blocked by the workspace dependency install, not by a confirmed PR-specific failure.

--
Yours,
CodeNomadBot