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/toml_edit-0.22.27/src/de/array.rs

@@ -0,0 +1,97 @@
+use crate::de::Error;
+
+pub(crate) struct ArrayDeserializer {
+    input: Vec<crate::Item>,
+    span: Option<std::ops::Range<usize>>,
+}
+
+impl ArrayDeserializer {
+    pub(crate) fn new(input: Vec<crate::Item>, span: Option<std::ops::Range<usize>>) -> Self {
+        Self { input, span }
+    }
+}
+
+// Note: this is wrapped by `ValueDeserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for ArrayDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_seq(ArraySeqAccess::new(self.input))
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.span.clone() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self, span));
+            }
+        }
+
+        self.deserialize_any(visitor)
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map option unit newtype_struct
+        ignored_any unit_struct tuple_struct tuple enum identifier
+    }
+}
+
+impl serde::de::IntoDeserializer<'_, Error> for ArrayDeserializer {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl crate::Array {
+    pub(crate) fn into_deserializer(self) -> ArrayDeserializer {
+        ArrayDeserializer::new(self.values, self.span)
+    }
+}
+
+impl crate::ArrayOfTables {
+    pub(crate) fn into_deserializer(self) -> ArrayDeserializer {
+        ArrayDeserializer::new(self.values, self.span)
+    }
+}
+
+pub(crate) struct ArraySeqAccess {
+    iter: std::vec::IntoIter<crate::Item>,
+}
+
+impl ArraySeqAccess {
+    pub(crate) fn new(input: Vec<crate::Item>) -> Self {
+        Self {
+            iter: input.into_iter(),
+        }
+    }
+}
+
+impl<'de> serde::de::SeqAccess<'de> for ArraySeqAccess {
+    type Error = Error;
+
+    fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        match self.iter.next() {
+            Some(v) => seed
+                .deserialize(crate::de::ValueDeserializer::new(v))
+                .map(Some),
+            None => Ok(None),
+        }
+    }
+}

vendor/toml_edit-0.22.27/src/de/datetime.rs

@@ -0,0 +1,43 @@
+use serde::de::value::BorrowedStrDeserializer;
+use serde::de::IntoDeserializer;
+
+use crate::de::Error;
+
+pub(crate) struct DatetimeDeserializer {
+    date: Option<crate::Datetime>,
+}
+
+impl DatetimeDeserializer {
+    pub(crate) fn new(date: crate::Datetime) -> Self {
+        Self { date: Some(date) }
+    }
+}
+
+impl<'de> serde::de::MapAccess<'de> for DatetimeDeserializer {
+    type Error = Error;
+
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
+    where
+        K: serde::de::DeserializeSeed<'de>,
+    {
+        if self.date.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                toml_datetime::__unstable::FIELD,
+            ))
+            .map(Some)
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        if let Some(date) = self.date.take() {
+            seed.deserialize(date.to_string().into_deserializer())
+        } else {
+            panic!("next_value_seed called before next_key_seed")
+        }
+    }
+}

vendor/toml_edit-0.22.27/src/de/key.rs

@@ -0,0 +1,151 @@
+use serde::de::IntoDeserializer;
+
+use super::Error;
+
+pub(crate) struct KeyDeserializer {
+    span: Option<std::ops::Range<usize>>,
+    key: crate::Key,
+}
+
+impl KeyDeserializer {
+    pub(crate) fn new(key: crate::Key, span: Option<std::ops::Range<usize>>) -> Self {
+        KeyDeserializer { span, key }
+    }
+}
+
+impl IntoDeserializer<'_, Error> for KeyDeserializer {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl<'de> serde::de::Deserializer<'de> for KeyDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        self.key.into_deserializer().deserialize_any(visitor)
+    }
+
+    fn deserialize_enum<V>(
+        self,
+        name: &str,
+        variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let _ = name;
+        let _ = variants;
+        visitor.visit_enum(self)
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.span.clone() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self.key.get(), span));
+            }
+        }
+        self.deserialize_any(visitor)
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        _name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_newtype_struct(self)
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map option unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl<'de> serde::de::EnumAccess<'de> for KeyDeserializer {
+    type Error = Error;
+    type Variant = UnitOnly<Self::Error>;
+
+    fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        seed.deserialize(self).map(unit_only)
+    }
+}
+
+pub(crate) struct UnitOnly<E> {
+    marker: std::marker::PhantomData<E>,
+}
+
+fn unit_only<T, E>(t: T) -> (T, UnitOnly<E>) {
+    (
+        t,
+        UnitOnly {
+            marker: std::marker::PhantomData,
+        },
+    )
+}
+
+impl<'de, E> serde::de::VariantAccess<'de> for UnitOnly<E>
+where
+    E: serde::de::Error,
+{
+    type Error = E;
+
+    fn unit_variant(self) -> Result<(), Self::Error> {
+        Ok(())
+    }
+
+    fn newtype_variant_seed<T>(self, _seed: T) -> Result<T::Value, Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        Err(serde::de::Error::invalid_type(
+            serde::de::Unexpected::UnitVariant,
+            &"newtype variant",
+        ))
+    }
+
+    fn tuple_variant<V>(self, _len: usize, _visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        Err(serde::de::Error::invalid_type(
+            serde::de::Unexpected::UnitVariant,
+            &"tuple variant",
+        ))
+    }
+
+    fn struct_variant<V>(
+        self,
+        _fields: &'static [&'static str],
+        _visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        Err(serde::de::Error::invalid_type(
+            serde::de::Unexpected::UnitVariant,
+            &"struct variant",
+        ))
+    }
+}

vendor/toml_edit-0.22.27/src/de/mod.rs

@@ -0,0 +1,327 @@
+//! Deserializing TOML into Rust structures.
+//!
+//! This module contains all the Serde support for deserializing TOML documents into Rust structures.
+
+use serde::de::DeserializeOwned;
+
+mod array;
+mod datetime;
+mod key;
+mod spanned;
+mod table;
+mod table_enum;
+mod value;
+
+use array::ArrayDeserializer;
+use datetime::DatetimeDeserializer;
+use key::KeyDeserializer;
+use spanned::SpannedDeserializer;
+use table_enum::TableEnumDeserializer;
+
+pub use value::ValueDeserializer;
+
+/// Errors that can occur when deserializing a type.
+#[derive(Clone, PartialEq, Eq)]
+pub struct Error {
+    inner: crate::TomlError,
+}
+
+impl Error {
+    pub(crate) fn custom<T>(msg: T, span: Option<std::ops::Range<usize>>) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Error {
+            inner: crate::TomlError::custom(msg.to_string(), span),
+        }
+    }
+
+    /// Add key while unwinding
+    pub fn add_key(&mut self, key: String) {
+        self.inner.add_key(key);
+    }
+
+    /// What went wrong
+    pub fn message(&self) -> &str {
+        self.inner.message()
+    }
+
+    /// The start/end index into the original document where the error occurred
+    pub fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.inner.span()
+    }
+
+    pub(crate) fn set_span(&mut self, span: Option<std::ops::Range<usize>>) {
+        self.inner.set_span(span);
+    }
+}
+
+impl serde::de::Error for Error {
+    fn custom<T>(msg: T) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Error::custom(msg, None)
+    }
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.inner.fmt(f)
+    }
+}
+
+impl std::fmt::Debug for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.inner.fmt(f)
+    }
+}
+
+impl From<crate::TomlError> for Error {
+    fn from(e: crate::TomlError) -> Error {
+        Self { inner: e }
+    }
+}
+
+impl From<Error> for crate::TomlError {
+    fn from(e: Error) -> crate::TomlError {
+        e.inner
+    }
+}
+
+impl std::error::Error for Error {}
+
+/// Convert a TOML [documents][crate::DocumentMut] into `T`.
+#[cfg(feature = "parse")]
+pub fn from_str<T>(s: &'_ str) -> Result<T, Error>
+where
+    T: DeserializeOwned,
+{
+    let de = Deserializer::parse(s)?;
+    T::deserialize(de)
+}
+
+/// Convert a TOML [documents][crate::DocumentMut] into `T`.
+#[cfg(feature = "parse")]
+pub fn from_slice<T>(s: &'_ [u8]) -> Result<T, Error>
+where
+    T: DeserializeOwned,
+{
+    let s = std::str::from_utf8(s).map_err(|e| Error::custom(e, None))?;
+    from_str(s)
+}
+
+/// Convert a [`DocumentMut`][crate::DocumentMut] into `T`.
+pub fn from_document<T>(d: impl Into<Deserializer>) -> Result<T, Error>
+where
+    T: DeserializeOwned,
+{
+    let deserializer = d.into();
+    T::deserialize(deserializer)
+}
+
+/// Deserialization for TOML [documents][crate::DocumentMut].
+pub struct Deserializer<S = String> {
+    root: crate::Item,
+    raw: Option<S>,
+}
+
+impl Deserializer {
+    /// Deserialization implementation for TOML.
+    #[deprecated(since = "0.22.6", note = "Replaced with `Deserializer::from`")]
+    pub fn new(input: crate::DocumentMut) -> Self {
+        Self::from(input)
+    }
+}
+
+#[cfg(feature = "parse")]
+impl<S: AsRef<str>> Deserializer<S> {
+    /// Parse a TOML document
+    pub fn parse(raw: S) -> Result<Self, Error> {
+        crate::ImDocument::parse(raw)
+            .map(Self::from)
+            .map_err(Into::into)
+    }
+}
+
+impl From<crate::DocumentMut> for Deserializer {
+    fn from(doc: crate::DocumentMut) -> Self {
+        let crate::DocumentMut { root, .. } = doc;
+        Self { root, raw: None }
+    }
+}
+
+impl<S> From<crate::ImDocument<S>> for Deserializer<S> {
+    fn from(doc: crate::ImDocument<S>) -> Self {
+        let crate::ImDocument { root, raw, .. } = doc;
+        let raw = Some(raw);
+        Self { root, raw }
+    }
+}
+
+#[cfg(feature = "parse")]
+impl std::str::FromStr for Deserializer {
+    type Err = Error;
+
+    /// Parses a document from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let doc: crate::ImDocument<_> = s.parse().map_err(Error::from)?;
+        Ok(Deserializer::from(doc))
+    }
+}
+
+// Note: this is wrapped by `toml::de::Deserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de, S: Into<String>> serde::Deserializer<'de> for Deserializer<S> {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let raw = self.raw;
+        self.root
+            .into_deserializer()
+            .deserialize_any(visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_raw(raw.map(|r| r.into()));
+                e
+            })
+    }
+
+    // `None` is interpreted as a missing field so be sure to implement `Some`
+    // as a present field.
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let raw = self.raw;
+        self.root
+            .into_deserializer()
+            .deserialize_option(visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_raw(raw.map(|r| r.into()));
+                e
+            })
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let raw = self.raw;
+        self.root
+            .into_deserializer()
+            .deserialize_newtype_struct(name, visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_raw(raw.map(|r| r.into()));
+                e
+            })
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let raw = self.raw;
+        self.root
+            .into_deserializer()
+            .deserialize_struct(name, fields, visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_raw(raw.map(|r| r.into()));
+                e
+            })
+    }
+
+    // Called when the type to deserialize is an enum, as opposed to a field in the type.
+    fn deserialize_enum<V>(
+        self,
+        name: &'static str,
+        variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let raw = self.raw;
+        self.root
+            .into_deserializer()
+            .deserialize_enum(name, variants, visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_raw(raw.map(|r| r.into()));
+                e
+            })
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl serde::de::IntoDeserializer<'_, Error> for Deserializer {
+    type Deserializer = Deserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl serde::de::IntoDeserializer<'_, Error> for crate::DocumentMut {
+    type Deserializer = Deserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        Deserializer::from(self)
+    }
+}
+
+impl serde::de::IntoDeserializer<'_, Error> for crate::ImDocument<String> {
+    type Deserializer = Deserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        Deserializer::from(self)
+    }
+}
+
+pub(crate) fn validate_struct_keys(
+    table: &crate::table::KeyValuePairs,
+    fields: &'static [&'static str],
+) -> Result<(), Error> {
+    let extra_fields = table
+        .keys()
+        .filter_map(|key| {
+            if !fields.contains(&key.get()) {
+                Some(key.clone())
+            } else {
+                None
+            }
+        })
+        .collect::<Vec<_>>();
+
+    if extra_fields.is_empty() {
+        Ok(())
+    } else {
+        Err(Error::custom(
+            format!(
+                "unexpected keys in table: {}, available keys: {}",
+                extra_fields
+                    .iter()
+                    .map(|k| k.get())
+                    .collect::<Vec<_>>()
+                    .join(", "),
+                fields.join(", "),
+            ),
+            extra_fields[0].span(),
+        ))
+    }
+}

vendor/toml_edit-0.22.27/src/de/spanned.rs

@@ -0,0 +1,70 @@
+use serde::de::value::BorrowedStrDeserializer;
+use serde::de::IntoDeserializer as _;
+
+use super::Error;
+
+pub(crate) struct SpannedDeserializer<'de, T: serde::de::IntoDeserializer<'de, Error>> {
+    phantom_data: std::marker::PhantomData<&'de ()>,
+    start: Option<usize>,
+    end: Option<usize>,
+    value: Option<T>,
+}
+
+impl<'de, T> SpannedDeserializer<'de, T>
+where
+    T: serde::de::IntoDeserializer<'de, Error>,
+{
+    pub(crate) fn new(value: T, span: std::ops::Range<usize>) -> Self {
+        Self {
+            phantom_data: Default::default(),
+            start: Some(span.start),
+            end: Some(span.end),
+            value: Some(value),
+        }
+    }
+}
+
+impl<'de, T> serde::de::MapAccess<'de> for SpannedDeserializer<'de, T>
+where
+    T: serde::de::IntoDeserializer<'de, Error>,
+{
+    type Error = Error;
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
+    where
+        K: serde::de::DeserializeSeed<'de>,
+    {
+        if self.start.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                serde_spanned::__unstable::START_FIELD,
+            ))
+            .map(Some)
+        } else if self.end.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                serde_spanned::__unstable::END_FIELD,
+            ))
+            .map(Some)
+        } else if self.value.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                serde_spanned::__unstable::VALUE_FIELD,
+            ))
+            .map(Some)
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        if let Some(start) = self.start.take() {
+            seed.deserialize(start.into_deserializer())
+        } else if let Some(end) = self.end.take() {
+            seed.deserialize(end.into_deserializer())
+        } else if let Some(value) = self.value.take() {
+            seed.deserialize(value.into_deserializer())
+        } else {
+            panic!("next_value_seed called before next_key_seed")
+        }
+    }
+}

vendor/toml_edit-0.22.27/src/de/table.rs

@@ -0,0 +1,214 @@
+use serde::de::IntoDeserializer;
+
+use crate::de::Error;
+
+pub(crate) struct TableDeserializer {
+    span: Option<std::ops::Range<usize>>,
+    items: crate::table::KeyValuePairs,
+}
+
+// Note: this is wrapped by `Deserializer` and `ValueDeserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for TableDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_map(TableMapAccess::new(self))
+    }
+
+    // `None` is interpreted as a missing field so be sure to implement `Some`
+    // as a present field.
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_some(self)
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        _name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_newtype_struct(self)
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.span.clone() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self, span));
+            }
+        }
+
+        self.deserialize_any(visitor)
+    }
+
+    // Called when the type to deserialize is an enum, as opposed to a field in the type.
+    fn deserialize_enum<V>(
+        self,
+        _name: &'static str,
+        _variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if self.items.is_empty() {
+            Err(Error::custom(
+                "wanted exactly 1 element, found 0 elements",
+                self.span,
+            ))
+        } else if self.items.len() != 1 {
+            Err(Error::custom(
+                "wanted exactly 1 element, more than 1 element",
+                self.span,
+            ))
+        } else {
+            visitor.visit_enum(TableMapAccess::new(self))
+        }
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl IntoDeserializer<'_, Error> for TableDeserializer {
+    type Deserializer = TableDeserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl crate::Table {
+    pub(crate) fn into_deserializer(self) -> TableDeserializer {
+        TableDeserializer {
+            span: self.span(),
+            items: self.items,
+        }
+    }
+}
+
+impl crate::InlineTable {
+    pub(crate) fn into_deserializer(self) -> TableDeserializer {
+        TableDeserializer {
+            span: self.span(),
+            items: self.items,
+        }
+    }
+}
+
+pub(crate) struct TableMapAccess {
+    iter: indexmap::map::IntoIter<crate::Key, crate::Item>,
+    span: Option<std::ops::Range<usize>>,
+    value: Option<(crate::Key, crate::Item)>,
+}
+
+impl TableMapAccess {
+    pub(crate) fn new(input: TableDeserializer) -> Self {
+        Self {
+            iter: input.items.into_iter(),
+            span: input.span,
+            value: None,
+        }
+    }
+}
+
+impl<'de> serde::de::MapAccess<'de> for TableMapAccess {
+    type Error = Error;
+
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Self::Error>
+    where
+        K: serde::de::DeserializeSeed<'de>,
+    {
+        match self.iter.next() {
+            Some((k, v)) => {
+                let key_span = k.span();
+                let ret = seed
+                    .deserialize(super::KeyDeserializer::new(k.clone(), key_span.clone()))
+                    .map(Some)
+                    .map_err(|mut e: Self::Error| {
+                        if e.span().is_none() {
+                            e.set_span(key_span);
+                        }
+                        e
+                    });
+                self.value = Some((k, v));
+                ret
+            }
+            None => Ok(None),
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        match self.value.take() {
+            Some((k, v)) => {
+                let span = v.span().or_else(|| k.span());
+                seed.deserialize(crate::de::ValueDeserializer::new(v))
+                    .map_err(|mut e: Self::Error| {
+                        if e.span().is_none() {
+                            e.set_span(span);
+                        }
+                        e.add_key(k.get().to_owned());
+                        e
+                    })
+            }
+            None => {
+                panic!("no more values in next_value_seed, internal error in ValueDeserializer")
+            }
+        }
+    }
+}
+
+impl<'de> serde::de::EnumAccess<'de> for TableMapAccess {
+    type Error = Error;
+    type Variant = super::TableEnumDeserializer;
+
+    fn variant_seed<V>(mut self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        let (key, value) = match self.iter.next() {
+            Some(pair) => pair,
+            None => {
+                return Err(Error::custom(
+                    "expected table with exactly 1 entry, found empty table",
+                    self.span,
+                ));
+            }
+        };
+
+        let val = seed
+            .deserialize(key.into_deserializer())
+            .map_err(|mut e: Self::Error| {
+                if e.span().is_none() {
+                    e.set_span(key.span());
+                }
+                e
+            })?;
+
+        let variant = super::TableEnumDeserializer::new(value);
+
+        Ok((val, variant))
+    }
+}

vendor/toml_edit-0.22.27/src/de/table_enum.rs

@@ -0,0 +1,176 @@
+use crate::de::Error;
+
+/// Deserializes table values into enum variants.
+pub(crate) struct TableEnumDeserializer {
+    value: crate::Item,
+}
+
+impl TableEnumDeserializer {
+    pub(crate) fn new(value: crate::Item) -> Self {
+        TableEnumDeserializer { value }
+    }
+}
+
+impl<'de> serde::de::VariantAccess<'de> for TableEnumDeserializer {
+    type Error = Error;
+
+    fn unit_variant(self) -> Result<(), Self::Error> {
+        match self.value {
+            crate::Item::ArrayOfTables(values) => {
+                if values.is_empty() {
+                    Ok(())
+                } else {
+                    Err(Error::custom("expected empty array", values.span()))
+                }
+            }
+            crate::Item::Value(crate::Value::Array(values)) => {
+                if values.is_empty() {
+                    Ok(())
+                } else {
+                    Err(Error::custom("expected empty table", values.span()))
+                }
+            }
+            crate::Item::Table(values) => {
+                if values.is_empty() {
+                    Ok(())
+                } else {
+                    Err(Error::custom("expected empty table", values.span()))
+                }
+            }
+            crate::Item::Value(crate::Value::InlineTable(values)) => {
+                if values.is_empty() {
+                    Ok(())
+                } else {
+                    Err(Error::custom("expected empty table", values.span()))
+                }
+            }
+            e => Err(Error::custom(
+                format!("expected table, found {}", e.type_name()),
+                e.span(),
+            )),
+        }
+    }
+
+    fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        seed.deserialize(super::ValueDeserializer::new(self.value))
+    }
+
+    fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        match self.value {
+            crate::Item::ArrayOfTables(values) => {
+                let values_span = values.span();
+                let tuple_values = values.values.into_iter().collect::<Vec<_>>();
+
+                if tuple_values.len() == len {
+                    serde::de::Deserializer::deserialize_seq(
+                        super::ArrayDeserializer::new(tuple_values, values_span),
+                        visitor,
+                    )
+                } else {
+                    Err(Error::custom(
+                        format!("expected tuple with length {len}"),
+                        values_span,
+                    ))
+                }
+            }
+            crate::Item::Value(crate::Value::Array(values)) => {
+                let values_span = values.span();
+                let tuple_values = values.values.into_iter().collect::<Vec<_>>();
+
+                if tuple_values.len() == len {
+                    serde::de::Deserializer::deserialize_seq(
+                        super::ArrayDeserializer::new(tuple_values, values_span),
+                        visitor,
+                    )
+                } else {
+                    Err(Error::custom(
+                        format!("expected tuple with length {len}"),
+                        values_span,
+                    ))
+                }
+            }
+            crate::Item::Table(values) => {
+                let values_span = values.span();
+                let tuple_values: Result<Vec<_>, _> = values
+                    .items
+                    .into_iter()
+                    .enumerate()
+                    .map(|(index, (key, value))| match key.get().parse::<usize>() {
+                        Ok(key_index) if key_index == index => Ok(value),
+                        Ok(_) | Err(_) => Err(Error::custom(
+                            format!("expected table key `{}`, but was `{}`", index, key.get()),
+                            key.span(),
+                        )),
+                    })
+                    .collect();
+                let tuple_values = tuple_values?;
+
+                if tuple_values.len() == len {
+                    serde::de::Deserializer::deserialize_seq(
+                        super::ArrayDeserializer::new(tuple_values, values_span),
+                        visitor,
+                    )
+                } else {
+                    Err(Error::custom(
+                        format!("expected tuple with length {len}"),
+                        values_span,
+                    ))
+                }
+            }
+            crate::Item::Value(crate::Value::InlineTable(values)) => {
+                let values_span = values.span();
+                let tuple_values: Result<Vec<_>, _> = values
+                    .items
+                    .into_iter()
+                    .enumerate()
+                    .map(|(index, (key, value))| match key.get().parse::<usize>() {
+                        Ok(key_index) if key_index == index => Ok(value),
+                        Ok(_) | Err(_) => Err(Error::custom(
+                            format!("expected table key `{}`, but was `{}`", index, key.get()),
+                            key.span(),
+                        )),
+                    })
+                    .collect();
+                let tuple_values = tuple_values?;
+
+                if tuple_values.len() == len {
+                    serde::de::Deserializer::deserialize_seq(
+                        super::ArrayDeserializer::new(tuple_values, values_span),
+                        visitor,
+                    )
+                } else {
+                    Err(Error::custom(
+                        format!("expected tuple with length {len}"),
+                        values_span,
+                    ))
+                }
+            }
+            e => Err(Error::custom(
+                format!("expected table, found {}", e.type_name()),
+                e.span(),
+            )),
+        }
+    }
+
+    fn struct_variant<V>(
+        self,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        serde::de::Deserializer::deserialize_struct(
+            super::ValueDeserializer::new(self.value).with_struct_key_validation(),
+            "", // TODO: this should be the variant name
+            fields,
+            visitor,
+        )
+    }
+}

vendor/toml_edit-0.22.27/src/de/value.rs

@@ -0,0 +1,257 @@
+use serde::de::IntoDeserializer as _;
+
+use crate::de::DatetimeDeserializer;
+use crate::de::Error;
+
+/// Deserialization implementation for TOML [values][crate::Value].
+///
+/// Can be created either directly from TOML strings, using [`std::str::FromStr`],
+/// or from parsed [values][crate::Value] using [`serde::de::IntoDeserializer::into_deserializer`].
+///
+/// # Example
+///
+/// ```
+/// # #[cfg(feature = "parse")] {
+/// # #[cfg(feature = "display")] {
+/// use serde::Deserialize;
+///
+/// #[derive(Deserialize)]
+/// struct Config {
+///     title: String,
+///     owner: Owner,
+/// }
+///
+/// #[derive(Deserialize)]
+/// struct Owner {
+///     name: String,
+/// }
+///
+/// let value = r#"{ title = 'TOML Example', owner = { name = 'Lisa' } }"#;
+/// let deserializer = value.parse::<toml_edit::de::ValueDeserializer>().unwrap();
+/// let config = Config::deserialize(deserializer).unwrap();
+/// assert_eq!(config.title, "TOML Example");
+/// assert_eq!(config.owner.name, "Lisa");
+/// # }
+/// # }
+/// ```
+pub struct ValueDeserializer {
+    input: crate::Item,
+    validate_struct_keys: bool,
+}
+
+impl ValueDeserializer {
+    pub(crate) fn new(input: crate::Item) -> Self {
+        Self {
+            input,
+            validate_struct_keys: false,
+        }
+    }
+
+    pub(crate) fn with_struct_key_validation(mut self) -> Self {
+        self.validate_struct_keys = true;
+        self
+    }
+}
+
+// Note: this is wrapped by `toml::de::ValueDeserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for ValueDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        match self.input {
+            crate::Item::None => visitor.visit_none(),
+            crate::Item::Value(crate::Value::String(v)) => visitor.visit_string(v.into_value()),
+            crate::Item::Value(crate::Value::Integer(v)) => visitor.visit_i64(v.into_value()),
+            crate::Item::Value(crate::Value::Float(v)) => visitor.visit_f64(v.into_value()),
+            crate::Item::Value(crate::Value::Boolean(v)) => visitor.visit_bool(v.into_value()),
+            crate::Item::Value(crate::Value::Datetime(v)) => {
+                visitor.visit_map(DatetimeDeserializer::new(v.into_value()))
+            }
+            crate::Item::Value(crate::Value::Array(v)) => {
+                v.into_deserializer().deserialize_any(visitor)
+            }
+            crate::Item::Value(crate::Value::InlineTable(v)) => {
+                v.into_deserializer().deserialize_any(visitor)
+            }
+            crate::Item::Table(v) => v.into_deserializer().deserialize_any(visitor),
+            crate::Item::ArrayOfTables(v) => v.into_deserializer().deserialize_any(visitor),
+        }
+        .map_err(|mut e: Self::Error| {
+            if e.span().is_none() {
+                e.set_span(span);
+            }
+            e
+        })
+    }
+
+    // `None` is interpreted as a missing field so be sure to implement `Some`
+    // as a present field.
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        visitor.visit_some(self).map_err(|mut e: Self::Error| {
+            if e.span().is_none() {
+                e.set_span(span);
+            }
+            e
+        })
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        _name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        visitor
+            .visit_newtype_struct(self)
+            .map_err(|mut e: Self::Error| {
+                if e.span().is_none() {
+                    e.set_span(span);
+                }
+                e
+            })
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.input.span() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self, span));
+            }
+        }
+
+        if name == toml_datetime::__unstable::NAME && fields == [toml_datetime::__unstable::FIELD] {
+            let span = self.input.span();
+            if let crate::Item::Value(crate::Value::Datetime(d)) = self.input {
+                return visitor
+                    .visit_map(DatetimeDeserializer::new(d.into_value()))
+                    .map_err(|mut e: Self::Error| {
+                        if e.span().is_none() {
+                            e.set_span(span);
+                        }
+                        e
+                    });
+            }
+        }
+
+        if self.validate_struct_keys {
+            let span = self.input.span();
+            match &self.input {
+                crate::Item::Table(values) => super::validate_struct_keys(&values.items, fields),
+                crate::Item::Value(crate::Value::InlineTable(values)) => {
+                    super::validate_struct_keys(&values.items, fields)
+                }
+                _ => Ok(()),
+            }
+            .map_err(|mut e: Self::Error| {
+                if e.span().is_none() {
+                    e.set_span(span);
+                }
+                e
+            })?;
+        }
+
+        self.deserialize_any(visitor)
+    }
+
+    // Called when the type to deserialize is an enum, as opposed to a field in the type.
+    fn deserialize_enum<V>(
+        self,
+        name: &'static str,
+        variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        match self.input {
+            crate::Item::Value(crate::Value::String(v)) => {
+                visitor.visit_enum(v.into_value().into_deserializer())
+            }
+            crate::Item::Value(crate::Value::InlineTable(v)) => {
+                if v.is_empty() {
+                    Err(Error::custom(
+                        "wanted exactly 1 element, found 0 elements",
+                        v.span(),
+                    ))
+                } else if v.len() != 1 {
+                    Err(Error::custom(
+                        "wanted exactly 1 element, more than 1 element",
+                        v.span(),
+                    ))
+                } else {
+                    v.into_deserializer()
+                        .deserialize_enum(name, variants, visitor)
+                }
+            }
+            crate::Item::Table(v) => v
+                .into_deserializer()
+                .deserialize_enum(name, variants, visitor),
+            e => Err(Error::custom("wanted string or table", e.span())),
+        }
+        .map_err(|mut e: Self::Error| {
+            if e.span().is_none() {
+                e.set_span(span);
+            }
+            e
+        })
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl serde::de::IntoDeserializer<'_, Error> for ValueDeserializer {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl serde::de::IntoDeserializer<'_, Error> for crate::Value {
+    type Deserializer = ValueDeserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        ValueDeserializer::new(crate::Item::Value(self))
+    }
+}
+
+impl crate::Item {
+    pub(crate) fn into_deserializer(self) -> ValueDeserializer {
+        ValueDeserializer::new(self)
+    }
+}
+
+#[cfg(feature = "parse")]
+impl std::str::FromStr for ValueDeserializer {
+    type Err = Error;
+
+    /// Parses a value from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let value = s.parse::<crate::Value>().map_err(Error::from)?;
+        Ok(value.into_deserializer())
+    }
+}