chore: improve text contrast on light mode

[ethanndickson]

I discovered you pretty much never want to use gray as a text colour. secondary is only gray where appropriate.
The menu bar tray is slightly transparent, and .secondary and .primary text colours account for that.
As seen below, dark mode is almost unchanged.

Light Mode

Before (on a dark background)

After (on a dark background)

Note: Apple's decided to make secondary darker than primary in this case.

After (on a light background)

Dark Mode

Before

After

[ethanndickson]

• chore: improve text contrast on light mode #80 👈 (View in Graphite)
• chore: reduce error verbosity #79
• main

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[ethanndickson]

Merge activity

• Feb 26, 10:22 PM EST: A user started a stack merge that includes this pull request via Graphite.
• Feb 26, 10:25 PM EST: Graphite rebased this pull request as part of a merge.
• Feb 26, 10:27 PM EST: A user merged this pull request with Graphite.