[codex] Add sidebar style randomizer

[aurorascharff]

Summary

• add a compact Randomize button beneath the existing sidebar Preview Pad
• randomize named size, intensity, and duration presets
• generate distinct custom colors for left, right, middle, and drag click visuals
• mention Randomize in the README feature list

Why

PR #36 proposed a larger style preview experience, but the existing Preview Pad already covers testing without making Settings larger or reintroducing lag while changing controls. This keeps the useful randomization idea in the compact sidebar design.

Validation

• built locally with ./build-app.sh
• installed and tested as ClickLight Randomize Preview.app
• ran zizmor . with no findings

[Copilot]

Pull request overview

Adds a compact style randomizer to the existing settings sidebar preview workflow, letting users quickly generate preset-based size/intensity/duration combinations and per-click custom colors without expanding the settings UI.

Changes:

• Added randomizeStyle() to update visual settings and generate per-click custom colors.
• Added a small “Randomize” button beneath the sidebar Preview Pad.
• Updated the README feature list to mention the preview pad randomizer.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
Sources/ClickLight/SettingsWindowController.swift	Adds random style generation for size, intensity, duration, and custom click colors.
Sources/ClickLight/ClickLightSettingsView.swift	Adds the sidebar Randomize button wired to the view model.
README.md	Documents Randomize in the settings feature list.

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[jamesmontemagno]

I like the dice ❤️

[KyranTanDev]

Looks awesome!