The design's home hero pairs the greeting with a Sunrise glyph in the
warm horizon orange (#e89a6e). Previously we showed `IconName::Sun`
in `ACCENT_LIGHT` regardless of phase, so an evening user saw a noon
sun next to "Good evening, Alex".
Promote the day phase to a `DayPhase` enum so hero.rs can pick the
glyph + tint per phase: warm orange Sun in the morning, amber Sun in
the afternoon, cool violet Moon in the evening. Tests now compare
against the enum instead of the former `&'static str` wrapper.
Bonus: third quick-launch pill swaps from "Open History" (Undo2) to
"Open Notion" (BookOpen → notion.so) to match the design's third pill.
cargo test --workspace: 440 passed, 0 failed.
ZacharyZhang-NY
c27776ca42