The tray protocol selection used ordinary Unicode up/down arrows for its
priority buttons. The default UI fonts lack these glyphs, so both buttons
rendered missing-glyph boxes. Use the regular Phosphor ARROW_UP and ARROW_DOWN
icons already installed in the application's proportional font fallback.
Validation on Linux through nix develop:
- cargo fmt --all -- --check
- cargo clippy --locked --workspace --all-targets -- -D warnings
- cargo test --locked --workspace --all-targets, with inherited control socket
and group overrides removed: 509 passed, 2 existing ignored tests
No new tests were added for the two glyph substitutions. Manual tray rendering
and macOS/Windows checks were not performed. No release tag was requested for
this fix.
Aleksandr Bogomiakov
13bdcaf98d