feat: add display UI with splash screen, dashboard, and RSSI sparkline

Implement full SSD1306 OLED display support:
- Splash screen on boot (1.5s) with project name, version, board
- Dashboard showing radio state, config, counters, RSSI/SNR
- RSSI history sparkline (64-sample ring buffer, 2px-wide bars)
- DisplayOn/DisplayOff host commands routed via dedicated channel
- Pure render functions against generic DrawTarget (no hardware coupling)
- Display on/off control bypasses radio task entirely

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vendor/enum-as-inner/tests/basic.rs

@@ -0,0 +1,90 @@
+#![warn(
+    clippy::default_trait_access,
+    clippy::dbg_macro,
+    clippy::print_stdout,
+    clippy::unimplemented,
+    clippy::use_self,
+    missing_copy_implementations,
+    missing_docs,
+    non_snake_case,
+    non_upper_case_globals,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+
+use enum_as_inner::EnumAsInner;
+
+pub mod name_collisions {
+    #![allow(dead_code, missing_copy_implementations, missing_docs)]
+    pub struct Option;
+    pub struct Some;
+    pub struct None;
+    pub struct Result;
+    pub struct Ok;
+    pub struct Err;
+}
+#[allow(unused_imports)]
+use name_collisions::*;
+
+#[derive(Debug, EnumAsInner)]
+enum EmptyTest {}
+
+#[test]
+fn test_empty() {
+    let empty = std::option::Option::None::<EmptyTest>;
+
+    assert!(empty.is_none());
+}
+
+#[derive(Debug, EnumAsInner)]
+enum EmptyParendsTest {
+    Empty(),
+}
+
+#[test]
+fn test_empty_parends() {
+    let mut empty = EmptyParendsTest::Empty();
+
+    assert!(empty.is_empty());
+
+    empty
+        .as_empty()
+        .expect("should have been something and a unit");
+    empty
+        .as_empty_mut()
+        .expect("should have been something and a unit");
+
+    empty
+        .into_empty()
+        .expect("should have been something and a unit");
+}
+
+#[derive(Debug, EnumAsInner)]
+enum OneTest {
+    One(u32),
+}
+
+#[test]
+fn test_one() {
+    let mut empty = OneTest::One(1);
+
+    assert!(empty.is_one());
+    assert_eq!(*empty.as_one().unwrap(), 1);
+    assert_eq!(*empty.as_one_mut().unwrap(), 1);
+    assert_eq!(empty.into_one().unwrap(), 1);
+}
+
+#[derive(Debug, EnumAsInner)]
+enum MultiTest {
+    Multi(u32, u32),
+}
+
+#[test]
+fn test_multi() {
+    let mut multi = MultiTest::Multi(1, 1);
+
+    assert!(multi.is_multi());
+    assert_eq!(multi.as_multi().unwrap(), (&1_u32, &1_u32));
+    assert_eq!(multi.as_multi_mut().unwrap(), (&mut 1_u32, &mut 1_u32));
+    assert_eq!(multi.into_multi().unwrap(), (1_u32, 1_u32));
+}

vendor/enum-as-inner/tests/generics.rs

@@ -0,0 +1,53 @@
+#![warn(
+    clippy::default_trait_access,
+    clippy::dbg_macro,
+    clippy::print_stdout,
+    clippy::unimplemented,
+    clippy::use_self,
+    missing_copy_implementations,
+    missing_docs,
+    non_snake_case,
+    non_upper_case_globals,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+
+use enum_as_inner::EnumAsInner;
+
+pub mod name_collisions {
+    #![allow(dead_code, missing_copy_implementations, missing_docs)]
+    pub struct Option;
+    pub struct Some;
+    pub struct None;
+    pub struct Result;
+    pub struct Ok;
+    pub struct Err;
+}
+#[allow(unused_imports)]
+use name_collisions::*;
+
+#[allow(dead_code)]
+#[derive(Debug, Clone, Copy, EnumAsInner)]
+enum WithGenerics<T: Clone + Copy> {
+    A(T),
+    B(T),
+}
+
+#[test]
+fn with_generics() {
+    let mut with_generics = WithGenerics::A(100);
+
+    assert!(with_generics.is_a());
+    assert!(!with_generics.is_b());
+
+    assert!(with_generics.as_a().is_some());
+    assert!(with_generics.as_b().is_none());
+
+    assert_eq!(with_generics.into_a().unwrap(), 100);
+    assert_eq!(*with_generics.as_a().unwrap(), 100);
+    assert_eq!(*with_generics.as_a_mut().unwrap(), 100);
+
+    assert!(with_generics.into_b().is_err());
+    assert!(with_generics.as_b().is_none());
+    assert!(with_generics.as_b_mut().is_none());
+}

vendor/enum-as-inner/tests/named.rs

@@ -0,0 +1,99 @@
+#![warn(
+    clippy::default_trait_access,
+    clippy::dbg_macro,
+    clippy::print_stdout,
+    clippy::unimplemented,
+    clippy::use_self,
+    missing_copy_implementations,
+    missing_docs,
+    non_snake_case,
+    non_upper_case_globals,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+
+use enum_as_inner::EnumAsInner;
+
+pub mod name_collisions {
+    #![allow(dead_code, missing_copy_implementations, missing_docs)]
+    pub struct Option;
+    pub struct Some;
+    pub struct None;
+    pub struct Result;
+    pub struct Ok;
+    pub struct Err;
+}
+#[allow(unused_imports)]
+use name_collisions::*;
+
+#[derive(Debug, EnumAsInner)]
+enum ManyVariants {
+    One { one: u32 },
+    Two { one: u32, two: i32 },
+    Three { one: bool, two: u32, three: i64 },
+}
+
+#[test]
+fn test_one_named() {
+    let mut many = ManyVariants::One { one: 1 };
+
+    assert!(many.is_one());
+    assert!(!many.is_two());
+    assert!(!many.is_three());
+
+    assert!(many.as_one().is_some());
+    assert!(many.as_two().is_none());
+    assert!(many.as_three().is_none());
+
+    assert!(many.as_one_mut().is_some());
+    assert!(many.as_two_mut().is_none());
+    assert!(many.as_three_mut().is_none());
+
+    assert_eq!(*many.as_one().unwrap(), 1_u32);
+    assert_eq!(*many.as_one_mut().unwrap(), 1_u32);
+}
+
+#[test]
+fn test_two_named() {
+    let mut many = ManyVariants::Two { one: 1, two: 2 };
+
+    assert!(!many.is_one());
+    assert!(many.is_two());
+    assert!(!many.is_three());
+    assert!(many.as_one().is_none());
+    assert!(many.as_two().is_some());
+    assert!(many.as_three().is_none());
+    assert!(many.as_one_mut().is_none());
+    assert!(many.as_two_mut().is_some());
+    assert!(many.as_three_mut().is_none());
+
+    assert_eq!(many.as_two().unwrap(), (&1_u32, &2_i32));
+    assert_eq!(many.as_two_mut().unwrap(), (&mut 1_u32, &mut 2_i32));
+    assert_eq!(many.into_two().unwrap(), (1_u32, 2_i32));
+}
+
+#[test]
+fn test_three_named() {
+    let mut many = ManyVariants::Three {
+        one: true,
+        two: 1,
+        three: 2,
+    };
+
+    assert!(!many.is_one());
+    assert!(!many.is_two());
+    assert!(many.is_three());
+    assert!(many.as_one().is_none());
+    assert!(many.as_two().is_none());
+    assert!(many.as_three().is_some());
+    assert!(many.as_one_mut().is_none());
+    assert!(many.as_two_mut().is_none());
+    assert!(many.as_three_mut().is_some());
+
+    assert_eq!(many.as_three().unwrap(), (&true, &1_u32, &2_i64));
+    assert_eq!(
+        many.as_three_mut().unwrap(),
+        (&mut true, &mut 1_u32, &mut 2_i64)
+    );
+    assert_eq!(many.into_three().unwrap(), (true, 1_u32, 2_i64));
+}

vendor/enum-as-inner/tests/snake_case.rs

@@ -0,0 +1,69 @@
+#![warn(
+    clippy::default_trait_access,
+    clippy::dbg_macro,
+    clippy::print_stdout,
+    clippy::unimplemented,
+    clippy::use_self,
+    missing_copy_implementations,
+    missing_docs,
+    non_snake_case,
+    non_upper_case_globals,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+
+use enum_as_inner::EnumAsInner;
+
+pub mod name_collisions {
+    #![allow(dead_code, missing_copy_implementations, missing_docs)]
+    pub struct Option;
+    pub struct Some;
+    pub struct None;
+    pub struct Result;
+    pub struct Ok;
+    pub struct Err;
+}
+#[allow(unused_imports)]
+use name_collisions::*;
+
+#[derive(Debug, EnumAsInner)]
+#[allow(non_camel_case_types)]
+#[allow(clippy::upper_case_acronyms)]
+enum MixedCaseVariants {
+    XMLIsNotCool,
+    Rust_IsCoolThough(u32),
+    YMCA { named: i16 },
+}
+
+#[test]
+fn test_xml_unit() {
+    let mixed = MixedCaseVariants::XMLIsNotCool;
+
+    assert!(mixed.is_xml_is_not_cool());
+    assert!(mixed.as_rust_is_cool_though().is_none());
+    assert!(mixed.as_ymca().is_none());
+}
+
+#[test]
+fn test_rust_unnamed() {
+    let mixed = MixedCaseVariants::Rust_IsCoolThough(42);
+
+    assert!(!mixed.is_xml_is_not_cool());
+    assert!(mixed.as_rust_is_cool_though().is_some());
+    assert!(mixed.as_ymca().is_none());
+
+    assert_eq!(*mixed.as_rust_is_cool_though().unwrap(), 42);
+    assert_eq!(mixed.into_rust_is_cool_though().unwrap(), 42);
+}
+
+#[test]
+fn test_ymca_named() {
+    let mixed = MixedCaseVariants::YMCA { named: -32_768 };
+
+    assert!(!mixed.is_xml_is_not_cool());
+    assert!(mixed.as_rust_is_cool_though().is_none());
+    assert!(mixed.as_ymca().is_some());
+
+    assert_eq!(*mixed.as_ymca().unwrap(), (-32_768));
+    assert_eq!(mixed.into_ymca().unwrap(), (-32_768));
+}

vendor/enum-as-inner/tests/unit.rs

@@ -0,0 +1,61 @@
+#![warn(
+    clippy::default_trait_access,
+    clippy::dbg_macro,
+    clippy::print_stdout,
+    clippy::unimplemented,
+    clippy::use_self,
+    missing_copy_implementations,
+    missing_docs,
+    non_snake_case,
+    non_upper_case_globals,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+
+use enum_as_inner::EnumAsInner;
+
+pub mod name_collisions {
+    #![allow(dead_code, missing_copy_implementations, missing_docs)]
+    pub struct Option;
+    pub struct Some;
+    pub struct None;
+    pub struct Result;
+    pub struct Ok;
+    pub struct Err;
+}
+#[allow(unused_imports)]
+use name_collisions::*;
+
+#[derive(EnumAsInner)]
+enum UnitVariants {
+    Zero,
+    One,
+    Two,
+}
+
+#[test]
+fn test_zero_unit() {
+    let unit = UnitVariants::Zero;
+
+    assert!(unit.is_zero());
+    assert!(!unit.is_one());
+    assert!(!unit.is_two());
+}
+
+#[test]
+fn test_one_unit() {
+    let unit = UnitVariants::One;
+
+    assert!(!unit.is_zero());
+    assert!(unit.is_one());
+    assert!(!unit.is_two());
+}
+
+#[test]
+fn test_two_unit() {
+    let unit = UnitVariants::Two;
+
+    assert!(!unit.is_zero());
+    assert!(!unit.is_one());
+    assert!(unit.is_two());
+}

vendor/enum-as-inner/tests/unnamed.rs

@@ -0,0 +1,100 @@
+#![warn(
+    clippy::default_trait_access,
+    clippy::dbg_macro,
+    clippy::print_stdout,
+    clippy::unimplemented,
+    clippy::use_self,
+    missing_copy_implementations,
+    missing_docs,
+    non_snake_case,
+    non_upper_case_globals,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+
+use enum_as_inner::EnumAsInner;
+
+pub mod name_collisions {
+    #![allow(dead_code, missing_copy_implementations, missing_docs)]
+    pub struct Option;
+    pub struct Some;
+    pub struct None;
+    pub struct Result;
+    pub struct Ok;
+    pub struct Err;
+}
+#[allow(unused_imports)]
+use name_collisions::*;
+
+#[derive(Debug, EnumAsInner)]
+enum ManyVariants {
+    One(u32),
+    Two(u32, i32),
+    Three(bool, u32, i64),
+}
+
+#[test]
+fn test_one_unnamed() {
+    let mut many = ManyVariants::One(1);
+
+    assert!(many.is_one());
+    assert!(!many.is_two());
+    assert!(!many.is_three());
+
+    assert!(many.as_one().is_some());
+    assert!(many.as_two().is_none());
+    assert!(many.as_three().is_none());
+
+    assert!(many.as_one_mut().is_some());
+    assert!(many.as_two_mut().is_none());
+    assert!(many.as_three_mut().is_none());
+
+    assert_eq!(*many.as_one().unwrap(), 1_u32);
+    assert_eq!(*many.as_one_mut().unwrap(), 1_u32);
+    assert_eq!(many.into_one().unwrap(), 1_u32);
+}
+
+#[test]
+fn test_two_unnamed() {
+    let mut many = ManyVariants::Two(1, 2);
+
+    assert!(!many.is_one());
+    assert!(many.is_two());
+    assert!(!many.is_three());
+
+    assert!(many.as_one().is_none());
+    assert!(many.as_two().is_some());
+    assert!(many.as_three().is_none());
+
+    assert!(many.as_one_mut().is_none());
+    assert!(many.as_two_mut().is_some());
+    assert!(many.as_three_mut().is_none());
+
+    assert_eq!(many.as_two().unwrap(), (&1_u32, &2_i32));
+    assert_eq!(many.as_two_mut().unwrap(), (&mut 1_u32, &mut 2_i32));
+    assert_eq!(many.into_two().unwrap(), (1_u32, 2_i32));
+}
+
+#[test]
+fn test_three_unnamed() {
+    let mut many = ManyVariants::Three(true, 1, 2);
+
+    assert!(!many.is_one());
+    assert!(!many.is_two());
+    assert!(many.is_three());
+
+    assert!(many.as_one().is_none());
+    assert!(many.as_two().is_none());
+    assert!(many.as_three().is_some());
+
+    assert!(many.as_one_mut().is_none());
+    assert!(many.as_two_mut().is_none());
+    assert!(many.as_three_mut().is_some());
+
+    assert_eq!(many.as_three().unwrap(), (&true, &1_u32, &2_i64));
+    assert_eq!(
+        many.as_three_mut().unwrap(),
+        (&mut true, &mut 1_u32, &mut 2_i64)
+    );
+    assert_eq!(many.into_three().unwrap(), (true, 1_u32, 2_i64));
+}