Rework LCD GUI: content selector, live preview, auto-connect, multi-color RGB editor

[JustinMDotNet]

Summary

Reworks the LCD panel GUI for clarity and adds a live preview, based on hands-on review of the running app.

Content selection

• "What to display" radio selector so Image / Text / GIF / Built-in / Carousel / Sensors are visibly mutually exclusive — only the matching card is shown.

Live panel preview

• A Panel Preview card (320x170) renders the exact frame that will be sent for Image, Text, and GIF (first frame). Firmware-drawn modes (Built-in / Carousel / Sensors) show a caption placeholder since they can't be rendered client-side.
• PanelText.Render / PanelImage.Render320 now expose the RenderTargetBitmap so preview and send share one render path.

Auto-connect

• The app connects on launch (Windows only); no manual Refresh required.

Background service placement

• Moved the Install background service controls out of the Device tab into the LCD tab's Sensor Dashboard, shown only when a live sensor widget is selected. Every live sensor needs the feed service (the panel can't read GPU sensors itself), so this is where it belongs.

RGB multi-color editor + preview

• Replaced the fixed 3 color pickers with a dynamic add/remove color list and a banded preview strip.
• Colors are capped to what each protocol actually carries: 8 (legacy) / 17 (Blackwell). Switching to an effect that supports fewer colors auto-trims extras; single-color effects collapse to one swatch.
• Persist & restore last-applied RGB (effect, colors, brightness, speed) on launch. The Aorus GPU RGB controller is write-only — its live state can't be read back (confirmed in PROTOCOL.md and OpenRGB), so replaying the app's last-applied config is the best achievable "show what it's doing."

Testing

• dotnet build -c Release — 0 warnings.
• dotnet test -c Release — 38/38 pass.
• Manually reviewed the running GUI.

Notes

• Open follow-up: NVAPI I2C may require elevation, so unelevated auto-connect could fail on some systems. If so, a requireAdministrator manifest or a "run as admin" hint is the next step (not included here).

[Copilot]

Pull request overview

Reworks the Avalonia GUI for the Aorus LCD/RGB app to make panel content selection mutually exclusive, add a live 320×170 preview for rendered content, auto-connect on launch (Windows), and introduce a multi-color RGB editor with persisted “last-applied” settings.

Changes:

• Add a “What to display” selector and a shared Panel Preview for Image/Text/GIF render paths.
• Auto-connect to the panel on launch and reposition background-service controls into the Sensors workflow.
• Replace fixed RGB pickers with a dynamic color list + preview strip and persist/restore last-applied RGB settings.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/AorusLcd.Gui/Views/MainWindow.axaml	Adds content selector, panel preview, moves service UI into Sensors, and reworks RGB UI to a color list + preview.
src/AorusLcd.Gui/ViewModels/MainViewModel.cs	Implements content selection state, preview generation/disposal, auto-connect entry point, RGB color-list logic, and RGB settings persist/restore.
src/AorusLcd.Gui/Services/UiSettings.cs	Persists last-applied RGB mode/colors/brightness/speed.
src/AorusLcd.Gui/Services/PanelText.cs	Exposes a bitmap render method so preview and send share one render path.
src/AorusLcd.Gui/Services/PanelImage.cs	Exposes a 320×170 render method so preview and send share one render path.
src/AorusLcd.Gui/Models/RgbColorItem.cs	Adds per-color model for the RGB editor list.
src/AorusLcd.Gui/Converters/StringEqualityConverter.cs	Adds converter to bind RadioButton selection to a string content-type property.
src/AorusLcd.Gui/App.axaml.cs	Triggers auto-connect during app initialization.

Comments suppressed due to low confidence (1)

src/AorusLcd.Gui/ViewModels/MainViewModel.cs:875

• PersistRgbSettings() is called before the Blackwell RGB apply runs. If the I2C write fails, the UI will still save and replay settings that were not actually applied.

            RgbFusion2Blackwell.SpeedSlowest, RgbFusion2Blackwell.SpeedFastest);
        RgbColor[] colors = IsBlackwellMultiColorMode ? CollectRgbColors() : [color];
        PersistRgbSettings();
        return RunAsync("Applying RGB…", async () =>

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated no new comments.