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/nrf5340-app-pac/src/ficr_s/nfc/tagheader0.rs

@@ -0,0 +1,61 @@
+#[doc = "Register `TAGHEADER0` reader"]
+pub struct R(crate::R<TAGHEADER0_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<TAGHEADER0_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<TAGHEADER0_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<TAGHEADER0_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Field `MFGID` reader - Default Manufacturer ID: Nordic Semiconductor ASA has ICM 0x5F"]
+pub type MFGID_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD1` reader - Unique identifier byte 1"]
+pub type UD1_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD2` reader - Unique identifier byte 2"]
+pub type UD2_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD3` reader - Unique identifier byte 3"]
+pub type UD3_R = crate::FieldReader<u8, u8>;
+impl R {
+    #[doc = "Bits 0:7 - Default Manufacturer ID: Nordic Semiconductor ASA has ICM 0x5F"]
+    #[inline(always)]
+    pub fn mfgid(&self) -> MFGID_R {
+        MFGID_R::new((self.bits & 0xff) as u8)
+    }
+    #[doc = "Bits 8:15 - Unique identifier byte 1"]
+    #[inline(always)]
+    pub fn ud1(&self) -> UD1_R {
+        UD1_R::new(((self.bits >> 8) & 0xff) as u8)
+    }
+    #[doc = "Bits 16:23 - Unique identifier byte 2"]
+    #[inline(always)]
+    pub fn ud2(&self) -> UD2_R {
+        UD2_R::new(((self.bits >> 16) & 0xff) as u8)
+    }
+    #[doc = "Bits 24:31 - Unique identifier byte 3"]
+    #[inline(always)]
+    pub fn ud3(&self) -> UD3_R {
+        UD3_R::new(((self.bits >> 24) & 0xff) as u8)
+    }
+}
+#[doc = "Default header for NFC Tag. Software can read these values to populate NFCID1_3RD_LAST, NFCID1_2ND_LAST and NFCID1_LAST.\n\nThis register you can [`read`](crate::generic::Reg::read). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [tagheader0](index.html) module"]
+pub struct TAGHEADER0_SPEC;
+impl crate::RegisterSpec for TAGHEADER0_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [tagheader0::R](R) reader structure"]
+impl crate::Readable for TAGHEADER0_SPEC {
+    type Reader = R;
+}
+#[doc = "`reset()` method sets TAGHEADER0 to value 0xffff_ff5f"]
+impl crate::Resettable for TAGHEADER0_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ff5f
+    }
+}

vendor/nrf5340-app-pac/src/ficr_s/nfc/tagheader1.rs

@@ -0,0 +1,61 @@
+#[doc = "Register `TAGHEADER1` reader"]
+pub struct R(crate::R<TAGHEADER1_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<TAGHEADER1_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<TAGHEADER1_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<TAGHEADER1_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Field `UD4` reader - Unique identifier byte 4"]
+pub type UD4_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD5` reader - Unique identifier byte 5"]
+pub type UD5_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD6` reader - Unique identifier byte 6"]
+pub type UD6_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD7` reader - Unique identifier byte 7"]
+pub type UD7_R = crate::FieldReader<u8, u8>;
+impl R {
+    #[doc = "Bits 0:7 - Unique identifier byte 4"]
+    #[inline(always)]
+    pub fn ud4(&self) -> UD4_R {
+        UD4_R::new((self.bits & 0xff) as u8)
+    }
+    #[doc = "Bits 8:15 - Unique identifier byte 5"]
+    #[inline(always)]
+    pub fn ud5(&self) -> UD5_R {
+        UD5_R::new(((self.bits >> 8) & 0xff) as u8)
+    }
+    #[doc = "Bits 16:23 - Unique identifier byte 6"]
+    #[inline(always)]
+    pub fn ud6(&self) -> UD6_R {
+        UD6_R::new(((self.bits >> 16) & 0xff) as u8)
+    }
+    #[doc = "Bits 24:31 - Unique identifier byte 7"]
+    #[inline(always)]
+    pub fn ud7(&self) -> UD7_R {
+        UD7_R::new(((self.bits >> 24) & 0xff) as u8)
+    }
+}
+#[doc = "Default header for NFC Tag. Software can read these values to populate NFCID1_3RD_LAST, NFCID1_2ND_LAST and NFCID1_LAST.\n\nThis register you can [`read`](crate::generic::Reg::read). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [tagheader1](index.html) module"]
+pub struct TAGHEADER1_SPEC;
+impl crate::RegisterSpec for TAGHEADER1_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [tagheader1::R](R) reader structure"]
+impl crate::Readable for TAGHEADER1_SPEC {
+    type Reader = R;
+}
+#[doc = "`reset()` method sets TAGHEADER1 to value 0xffff_ffff"]
+impl crate::Resettable for TAGHEADER1_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}

vendor/nrf5340-app-pac/src/ficr_s/nfc/tagheader2.rs

@@ -0,0 +1,61 @@
+#[doc = "Register `TAGHEADER2` reader"]
+pub struct R(crate::R<TAGHEADER2_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<TAGHEADER2_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<TAGHEADER2_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<TAGHEADER2_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Field `UD8` reader - Unique identifier byte 8"]
+pub type UD8_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD9` reader - Unique identifier byte 9"]
+pub type UD9_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD10` reader - Unique identifier byte 10"]
+pub type UD10_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD11` reader - Unique identifier byte 11"]
+pub type UD11_R = crate::FieldReader<u8, u8>;
+impl R {
+    #[doc = "Bits 0:7 - Unique identifier byte 8"]
+    #[inline(always)]
+    pub fn ud8(&self) -> UD8_R {
+        UD8_R::new((self.bits & 0xff) as u8)
+    }
+    #[doc = "Bits 8:15 - Unique identifier byte 9"]
+    #[inline(always)]
+    pub fn ud9(&self) -> UD9_R {
+        UD9_R::new(((self.bits >> 8) & 0xff) as u8)
+    }
+    #[doc = "Bits 16:23 - Unique identifier byte 10"]
+    #[inline(always)]
+    pub fn ud10(&self) -> UD10_R {
+        UD10_R::new(((self.bits >> 16) & 0xff) as u8)
+    }
+    #[doc = "Bits 24:31 - Unique identifier byte 11"]
+    #[inline(always)]
+    pub fn ud11(&self) -> UD11_R {
+        UD11_R::new(((self.bits >> 24) & 0xff) as u8)
+    }
+}
+#[doc = "Default header for NFC Tag. Software can read these values to populate NFCID1_3RD_LAST, NFCID1_2ND_LAST and NFCID1_LAST.\n\nThis register you can [`read`](crate::generic::Reg::read). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [tagheader2](index.html) module"]
+pub struct TAGHEADER2_SPEC;
+impl crate::RegisterSpec for TAGHEADER2_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [tagheader2::R](R) reader structure"]
+impl crate::Readable for TAGHEADER2_SPEC {
+    type Reader = R;
+}
+#[doc = "`reset()` method sets TAGHEADER2 to value 0xffff_ffff"]
+impl crate::Resettable for TAGHEADER2_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}

vendor/nrf5340-app-pac/src/ficr_s/nfc/tagheader3.rs

@@ -0,0 +1,61 @@
+#[doc = "Register `TAGHEADER3` reader"]
+pub struct R(crate::R<TAGHEADER3_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<TAGHEADER3_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<TAGHEADER3_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<TAGHEADER3_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Field `UD12` reader - Unique identifier byte 12"]
+pub type UD12_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD13` reader - Unique identifier byte 13"]
+pub type UD13_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD14` reader - Unique identifier byte 14"]
+pub type UD14_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `UD15` reader - Unique identifier byte 15"]
+pub type UD15_R = crate::FieldReader<u8, u8>;
+impl R {
+    #[doc = "Bits 0:7 - Unique identifier byte 12"]
+    #[inline(always)]
+    pub fn ud12(&self) -> UD12_R {
+        UD12_R::new((self.bits & 0xff) as u8)
+    }
+    #[doc = "Bits 8:15 - Unique identifier byte 13"]
+    #[inline(always)]
+    pub fn ud13(&self) -> UD13_R {
+        UD13_R::new(((self.bits >> 8) & 0xff) as u8)
+    }
+    #[doc = "Bits 16:23 - Unique identifier byte 14"]
+    #[inline(always)]
+    pub fn ud14(&self) -> UD14_R {
+        UD14_R::new(((self.bits >> 16) & 0xff) as u8)
+    }
+    #[doc = "Bits 24:31 - Unique identifier byte 15"]
+    #[inline(always)]
+    pub fn ud15(&self) -> UD15_R {
+        UD15_R::new(((self.bits >> 24) & 0xff) as u8)
+    }
+}
+#[doc = "Default header for NFC Tag. Software can read these values to populate NFCID1_3RD_LAST, NFCID1_2ND_LAST and NFCID1_LAST.\n\nThis register you can [`read`](crate::generic::Reg::read). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [tagheader3](index.html) module"]
+pub struct TAGHEADER3_SPEC;
+impl crate::RegisterSpec for TAGHEADER3_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [tagheader3::R](R) reader structure"]
+impl crate::Readable for TAGHEADER3_SPEC {
+    type Reader = R;
+}
+#[doc = "`reset()` method sets TAGHEADER3 to value 0xffff_ffff"]
+impl crate::Resettable for TAGHEADER3_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}