Simplify toolbar icons and highlight active filters

[austin-smith]

What Changed

• Replace circled action, filter, and sort toolbar symbols with plain variants on iOS and macOS.
• Use native prominent button styling when label filters are active, with stable popover anchors and accessible active/inactive values.

Why

Avoid redundant circles inside system toolbar buttons and distinguish active filters through a filled background instead of icon color alone.

UI Changes

• Active filter buttons have an accent-filled system background; clearing filters restores the neutral appearance.
• Filter buttons still open their existing popovers, which remain open when filter state changes.

Validation

• iOS simulator and macOS builds passed.
• Manually verified active and cleared filter states and popover behavior on both platforms.
• SwiftLint and git diff --check passed.
• Autoreview found no actionable issues.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-19T06:07:34.094139Z	36e7ac9	Manual request

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 0e734a3e62

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[austin-smith]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 36e7ac964b

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

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