feat(theme): add support for matugen smart mode and type

[haikalllp]

Description

Adds support for matugen --mode smart and --type scheme-smart.
Btw, manual theme toggle still wins, and automatically disable the smart mode. There is no UI gating atm, because I thought the log is sufficient, and Matugen 4.2.0 is latest cargo release anyways.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that changes existing behavior)
• Refactor / internal cleanup
• Documentation
• Other

Related issues

none

Screenshots / video

showcase.mp4

Checklist

• My code follows the conventions in CONTRIBUTING.md
• I have tested my changes locally
• New user-facing strings are wrapped in I18n.tr() with translator context, reusing existing terms where possible
• Go changes: ran make fmt, added/updated tests, make test passes, and go mod tidy is clean
• QML changes: ran make lint-qml with no new warnings
• I have opened a corresponding pull request in dlx-docs to document any new behaviors: https://github.com/AvengeMedia/DankLinux-Docs

[bbedward]

/claude review

[claude]

Claude review

Feature looks sound overall; three issues, one of which will disable the new setting on its own.

• Theme.setLightMode() clears matugenSmartMode on every call, including the portal-driven one from PortalService.colorSchemeSettleTimer (syncModeWithPortal defaults on) — quickshell/Common/Theme.qml:1175
• Smart-mode flips call SessionData.setLightMode() directly and skip SettingsData.updateCosmicThemeMode(), so COSMIC stays stale — quickshell/Common/Theme.qml:2085
• New Auto (Light Mode) / Auto (Dark Mode) / Auto From Wallpaper strings lack translator context and add terms that already exist in en.json — quickshell/Modules/ControlCenter/Components/DragDropGrid.qml:750

Checked: matugen smart mode/scheme resolution and version gating in Go, queue/handler wiring, preview --image plumbing, and the QML settings/control-center/Theme paths. Model: claude-opus-5.

[haikalllp]

Do I fix these issues @bbedward ? They seem valid to me..

[haikalllp]

/claude review

[hthienloc]

/claude review

[haikalllp]

/claude review

Thanks!

[claude]

Claude review

One finding this round; the three from the previous review are addressed.

• matugenSmartMode is treated as always-in-effect, but it only drives the mode on the dynamic theme — switching to a stock theme leaves the flag stuck on (toggle is greyed out), silently disabling portal color-scheme sync and mislabeling the control-center tile, quickshell/Services/PortalService.qml:94

Checked: smart mode/scheme resolution and 4.2 version gating in Go, SupportsSmart plumbing through matugen.status to DMSService, preview --image path, {{mode}} in dank.json and its consumers, the wallpaper-sync-skip loop guard in SessionData.setLightMode, portal/cosmic/ThemeAutoService interactions, and translator context on the new strings. Model: claude-opus-5.