chore: release v0.4.0

[jondkinney]

🤖 New release

• vernier-rs-core: 0.3.0 -> 0.4.0 (⚠ API breaking changes)
• vernier-rs-platform: 0.3.0 -> 0.4.0 (⚠ API breaking changes)
• vernier-rs-ui: 0.3.0 -> 0.4.0 (✓ API compatible changes)
• vernier-rs: 0.3.0 -> 0.4.0

⚠ vernier-rs-core breaking changes

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field Settings.edge_bias in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/settings.rs:21
  field Settings.edge_bias in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/settings.rs:21
  field EdgeCandidate.edge_phys in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:135
  field EdgeCandidate.edge_phys in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:135
  field ShortcutSettings.bias_cycle in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/settings.rs:537
  field ShortcutSettings.bias_cycle in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/settings.rs:537

--- failure derive_trait_impl_removed: built-in derived trait no longer implemented ---

Description:
A public type has stopped deriving one or more traits. This can break downstream code that depends on those types implementing those traits.
        ref: https://doc.rust-lang.org/reference/attributes/derive.html#derive
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/derive_trait_impl_removed.ron

Failed in:
  type Measurement no longer derives Eq, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/measurement.rs:37
  type Measurement no longer derives Eq, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/measurement.rs:37
  type EdgeCandidate no longer derives Eq, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:124
  type EdgeCandidate no longer derives Eq, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:124
  type SnapPoint no longer derives Eq, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/measurement.rs:14
  type SnapPoint no longer derives Eq, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/measurement.rs:14

--- failure function_parameter_count_changed: pub fn parameter count changed ---

Description:
A publicly-visible function now takes a different number of parameters.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/function_parameter_count_changed.ron

Failed in:
  vernier_rs_core::edge::shrink_to_content_with_bg now takes 8 parameters instead of 7, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:416
  vernier_rs_core::shrink_to_content_with_bg now takes 8 parameters instead of 7, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:416
  vernier_rs_core::edge::detect_edges now takes 4 parameters instead of 3, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:146
  vernier_rs_core::detect_edges now takes 4 parameters instead of 3, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:146
  vernier_rs_core::edge::shrink_to_content now takes 7 parameters instead of 6, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:398
  vernier_rs_core::shrink_to_content now takes 7 parameters instead of 6, in /tmp/.tmpHK2DDD/vernier/crates/vernier-core/src/edge.rs:398

⚠ vernier-rs-platform breaking changes

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field HeldRect.bounds_phys in /tmp/.tmpHK2DDD/vernier/crates/vernier-platform/src/types.rs:431
  field HudEdge.pos_phys in /tmp/.tmpHK2DDD/vernier/crates/vernier-platform/src/types.rs:605
  field StuckMeasurement.len_phys in /tmp/.tmpHK2DDD/vernier/crates/vernier-platform/src/types.rs:462

Changelog

vernier-rs

0.4.0 - 2026-05-26

Added

• (prefs) record chords through the daemon + bundle Adwaita Sans
• (core) soft-edge localization with edge-bias control
• (linux) render the overlay at the true fractional display scale

Fixed

• pixel-perfect measurement — exact physical-pixel pipeline
• scale HUD strokes to the display + track monitor changes live

Other

• fix cargo fmt + macOS clippy on the chord-recording PR

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This PR was generated with release-plz.