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/usb-device/CHANGELOG.md

@@ -0,0 +1,99 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.3.2] - 2024-03-06
+
+### Added
+* A new `log` feature can be enabled to provide logging and tracing information about the USB
+interface.
+
+### Changed
+* [breaking] LangIDs no longer implement `TryFromPrimitive`. The minor version has not been bumped
+as this was not intended to be used in the public API.
+    - If this is problematic, please open an issue in the main `usb-device` repository.
+* Changed handling of EP0 state to eliminate unexpected issues with device enumeration
+
+## [0.3.1] - 2023-11-15
+
+### Added
+* `BuilderError`, `LangID`, `StringDescriptors` now in `prelude`
+* `LangID` now in `class_prelude`
+
+### Changed
+* Updated documentation, including example code
+
+## [0.3.0] - 2023-11-13
+
+### Fixed
+* Fixed a defect where enumeration may fail due to timing-related issues ([#128](https://github.com/rust-embedded-community/usb-device/issues/128))
+
+### Added
+* New enums and allocators for Isochronous endpoints ([#60](https://github.com/rust-embedded-community/usb-device/pull/60)).
+* Ability to select USB revision ([#116](https://github.com/rust-embedded-community/usb-device/pull/116)).
+* Added support for alternate settings on interfaces ([#114](https://github.com/rust-embedded-community/usb-device/pull/114)).
+* Added support for architectures without atomics ([#115](https://github.com/rust-embedded-community/usb-device/pull/115)).
+* Added support for multi-language STRING desc ([#122](https://github.com/rust-embedded-community/usb-device/pull/122)).
+  * `UsbDeviceBuilder` has a public `.extra_lang_ids()` method to specify LANGIDs besides ENGLISH_US(0x0409)
+
+### Breaking
+* Acess numeric form of `EndpointType` variants now require a `.to_bm_attributes()`. ([#60](https://github.com/rust-embedded-community/usb-device/pull/60))
+* `DescriptorWriter::iad()` now requires a `Option<StringIndex>` to optionally specify a string for describing the function ([#121](https://github.com/rust-embedded-community/usb-device/pull/121))
+* `.manufacturer()`, `.product()` and `.serial_number()` of `UsbDeviceBuilder` are now replaced with the `strings()` function that accepts a `StringDescriptor` list to allow multilanguage support ([#122](https://github.com/rust-embedded-community/usb-device/pull/122))
+* Various methods of the `UsbDeviceBuilder` now return `Result<>` types instead of internally panicking.
+
+### Changed
+* `EndpointType` enum now has fields for isochronous synchronization and usage ([#60](https://github.com/rust-embedded-community/usb-device/pull/60)).
+* `descriptor_type::STRING` of `fn get_descriptor()` will send the LANGIDs supported by device, and respond STRING Request with specified LANGID. ([#122](https://github.com/rust-embedded-community/usb-device/pull/122))
+* `UsbError` is now copyable and comparable ([#127](https://github.com/rust-embedded-community/usb-device/pull/127))
+
+## [0.2.9] - 2022-08-02
+
+### Added
+* Optional support for defmt ([#76](https://github.com/rust-embedded-community/usb-device/pull/76)).
+
+### Fixed
+* Fixed an issue where USB devices were not enumerating on Windows ([#32](https://github.com/rust-embedded-community/usb-device/issues/82))
+* Fixed Suspend state transition so it goes back to the previous state, not just Default ([#97](https://github.com/rust-embedded-community/usb-device/pull/97))
+
+## [0.2.8] - 2021-03-13
+
+## [0.2.7] - 2020-10-03
+
+## [0.2.6] - 2020-09-22
+
+## [0.2.5] - 2020-02-10
+
+## [0.2.4] - 2020-02-01
+
+## [0.2.3] - 2019-08-28
+
+## [0.2.2] - 2019-07-27
+
+## [0.2.1] - 2019-06-07
+
+## [0.2.0] - 2019-06-07
+
+## 0.1.0 - 2019-06-07
+
+This is the initial release to crates.io.
+
+[Unreleased]: https://github.com/rust-embedded-community/usb-device/compare/v0.3.2...HEAD
+[0.3.2]: https://github.com/rust-embedded-community/usb-device/compare/v0.3.1...v0.3.2
+[0.3.1]: https://github.com/rust-embedded-community/usb-device/compare/v0.3.0...v0.3.1
+[0.3.0]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.9...v0.3.0
+[0.2.9]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.8...v0.2.9
+[0.2.8]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.7...v0.2.8
+[0.2.7]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.6...v0.2.7
+[0.2.6]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.5...v0.2.6
+[0.2.5]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.4...v0.2.5
+[0.2.4]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.3...v0.2.4
+[0.2.3]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.2...v0.2.3
+[0.2.2]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.1...v0.2.2
+[0.2.1]: https://github.com/rust-embedded-community/usb-device/compare/v0.2.0...v0.2.1
+[0.2.0]: https://github.com/rust-embedded-community/usb-device/compare/v0.1.0...v0.2.0