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/ser/array.rs

@@ -0,0 +1,102 @@
+use super::Error;
+
+#[doc(hidden)]
+pub struct SerializeValueArray {
+    values: Vec<crate::Item>,
+}
+
+impl SerializeValueArray {
+    pub(crate) fn seq(len: Option<usize>) -> Self {
+        let mut values = Vec::new();
+        if let Some(len) = len {
+            values.reserve(len);
+        }
+        Self { values }
+    }
+}
+
+impl serde::ser::SerializeSeq for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_element<T>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        let value = value.serialize(super::ValueSerializer {})?;
+        self.values.push(crate::Item::Value(value));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(crate::Value::Array(crate::Array::with_vec(self.values)))
+    }
+}
+
+impl serde::ser::SerializeTuple for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_element<T>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+impl serde::ser::SerializeTupleStruct for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+pub struct SerializeTupleVariant {
+    variant: &'static str,
+    inner: SerializeValueArray,
+}
+
+impl SerializeTupleVariant {
+    pub(crate) fn tuple(variant: &'static str, len: usize) -> Self {
+        Self {
+            variant,
+            inner: SerializeValueArray::seq(Some(len)),
+        }
+    }
+}
+
+impl serde::ser::SerializeTupleVariant for SerializeTupleVariant {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        serde::ser::SerializeSeq::serialize_element(&mut self.inner, value)
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let inner = serde::ser::SerializeSeq::end(self.inner)?;
+        let mut items = crate::table::KeyValuePairs::new();
+        let value = crate::Item::Value(inner);
+        items.insert(crate::Key::new(self.variant), value);
+        Ok(crate::Value::InlineTable(crate::InlineTable::with_pairs(
+            items,
+        )))
+    }
+}

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

@@ -0,0 +1,173 @@
+use crate::Key;
+
+use super::Error;
+
+pub(crate) struct KeySerializer;
+
+impl serde::ser::Serializer for KeySerializer {
+    type Ok = Key;
+    type Error = Error;
+    type SerializeSeq = serde::ser::Impossible<Self::Ok, Error>;
+    type SerializeTuple = serde::ser::Impossible<Self::Ok, Error>;
+    type SerializeTupleStruct = serde::ser::Impossible<Self::Ok, Error>;
+    type SerializeTupleVariant = serde::ser::Impossible<Self::Ok, Error>;
+    type SerializeMap = serde::ser::Impossible<Self::Ok, Error>;
+    type SerializeStruct = serde::ser::Impossible<Self::Ok, Error>;
+    type SerializeStructVariant = serde::ser::Impossible<Self::Ok, Error>;
+
+    fn serialize_bool(self, _v: bool) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_i8(self, _v: i8) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_i16(self, _v: i16) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_i32(self, _v: i32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_i64(self, _v: i64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_u8(self, _v: u8) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_u16(self, _v: u16) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_u32(self, _v: u32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_u64(self, _v: u64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_f32(self, _v: f32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_f64(self, _v: f64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_char(self, _v: char) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_str(self, value: &str) -> Result<Self::Ok, Self::Error> {
+        Ok(Key::new(value))
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_some<T>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Ok(variant.into())
+    }
+
+    fn serialize_newtype_struct<T>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Err(Error::key_not_string())
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(Error::key_not_string())
+    }
+}

vendor/toml_edit-0.22.27/src/ser/map.rs

@@ -0,0 +1,608 @@
+use super::array::SerializeTupleVariant;
+use super::array::SerializeValueArray;
+use super::key::KeySerializer;
+use super::value::ValueSerializer;
+use super::Error;
+
+#[doc(hidden)]
+#[allow(clippy::large_enum_variant)]
+pub enum SerializeMap {
+    Datetime(SerializeDatetime),
+    Table(SerializeInlineTable),
+}
+
+impl SerializeMap {
+    pub(crate) fn map(len: Option<usize>) -> Self {
+        Self::Table(SerializeInlineTable::map(len))
+    }
+
+    pub(crate) fn struct_(name: &'static str, len: Option<usize>) -> Self {
+        if name == toml_datetime::__unstable::NAME {
+            Self::Datetime(SerializeDatetime::new())
+        } else {
+            Self::map(len)
+        }
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeMap {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_key<T>(&mut self, input: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        match self {
+            Self::Datetime(s) => s.serialize_key(input),
+            Self::Table(s) => s.serialize_key(input),
+        }
+    }
+
+    fn serialize_value<T>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        match self {
+            Self::Datetime(s) => s.serialize_value(value),
+            Self::Table(s) => s.serialize_value(value),
+        }
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        match self {
+            Self::Datetime(s) => s.end().map(|items| items.into()),
+            Self::Table(s) => s.end().map(|items| items.into()),
+        }
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeMap {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        match self {
+            Self::Datetime(s) => s.serialize_field(key, value),
+            Self::Table(s) => s.serialize_field(key, value),
+        }
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        match self {
+            Self::Datetime(s) => s.end().map(|items| items.into()),
+            Self::Table(s) => s.end().map(|items| items.into()),
+        }
+    }
+}
+
+#[doc(hidden)]
+pub struct SerializeDatetime {
+    value: Option<crate::Datetime>,
+}
+
+impl SerializeDatetime {
+    pub(crate) fn new() -> Self {
+        Self { value: None }
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeDatetime {
+    type Ok = crate::Datetime;
+    type Error = Error;
+
+    fn serialize_key<T>(&mut self, _input: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        unreachable!("datetimes should only be serialized as structs, not maps")
+    }
+
+    fn serialize_value<T>(&mut self, _value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        unreachable!("datetimes should only be serialized as structs, not maps")
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        unreachable!("datetimes should only be serialized as structs, not maps")
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeDatetime {
+    type Ok = crate::Datetime;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        if key == toml_datetime::__unstable::FIELD {
+            self.value = Some(value.serialize(DatetimeFieldSerializer::default())?);
+        }
+
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        self.value.ok_or(Error::unsupported_none())
+    }
+}
+
+#[doc(hidden)]
+pub struct SerializeInlineTable {
+    items: crate::table::KeyValuePairs,
+    key: Option<crate::Key>,
+}
+
+impl SerializeInlineTable {
+    pub(crate) fn map(len: Option<usize>) -> Self {
+        let mut items: crate::table::KeyValuePairs = Default::default();
+        let key = Default::default();
+        if let Some(len) = len {
+            items.reserve(len);
+        }
+        Self { items, key }
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeInlineTable {
+    type Ok = crate::InlineTable;
+    type Error = Error;
+
+    fn serialize_key<T>(&mut self, input: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        self.key = Some(input.serialize(KeySerializer)?);
+        Ok(())
+    }
+
+    fn serialize_value<T>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        let mut is_none = false;
+        let value_serializer = MapValueSerializer::new(&mut is_none);
+        let res = value.serialize(value_serializer);
+        match res {
+            Ok(item) => {
+                let key = self.key.take().unwrap();
+                let item = crate::Item::Value(item);
+                self.items.insert(key, item);
+            }
+            Err(e) => {
+                if !(e == Error::unsupported_none() && is_none) {
+                    return Err(e);
+                }
+            }
+        }
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(crate::InlineTable::with_pairs(self.items))
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeInlineTable {
+    type Ok = crate::InlineTable;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        let mut is_none = false;
+        let value_serializer = MapValueSerializer::new(&mut is_none);
+        let res = value.serialize(value_serializer);
+        match res {
+            Ok(item) => {
+                let item = crate::Item::Value(item);
+                self.items.insert(crate::Key::new(key), item);
+            }
+            Err(e) => {
+                if !(e == Error::unsupported_none() && is_none) {
+                    return Err(e);
+                }
+            }
+        };
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(crate::InlineTable::with_pairs(self.items))
+    }
+}
+
+#[derive(Default)]
+struct DatetimeFieldSerializer {}
+
+impl serde::ser::Serializer for DatetimeFieldSerializer {
+    type Ok = toml_datetime::Datetime;
+    type Error = Error;
+    type SerializeSeq = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTuple = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleStruct = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeStruct = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeStructVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_i8(self, _value: i8) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_i16(self, _value: i16) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_i32(self, _value: i32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_i64(self, _value: i64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_u8(self, _value: u8) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_u16(self, _value: u16) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_u32(self, _value: u32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_u64(self, _value: u64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_f32(self, _value: f32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_f64(self, _value: f64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        v.parse::<toml_datetime::Datetime>().map_err(Error::custom)
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_some<T>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_newtype_struct<T>(
+        self,
+        _name: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Err(Error::date_invalid())
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(Error::date_invalid())
+    }
+}
+
+struct MapValueSerializer<'d> {
+    is_none: &'d mut bool,
+}
+
+impl<'d> MapValueSerializer<'d> {
+    fn new(is_none: &'d mut bool) -> Self {
+        Self { is_none }
+    }
+}
+
+impl serde::ser::Serializer for MapValueSerializer<'_> {
+    type Ok = crate::Value;
+    type Error = Error;
+    type SerializeSeq = SerializeValueArray;
+    type SerializeTuple = SerializeValueArray;
+    type SerializeTupleStruct = SerializeValueArray;
+    type SerializeTupleVariant = SerializeTupleVariant;
+    type SerializeMap = SerializeMap;
+    type SerializeStruct = SerializeMap;
+    type SerializeStructVariant = SerializeStructVariant;
+
+    fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_bool(v)
+    }
+
+    fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i8(v)
+    }
+
+    fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i16(v)
+    }
+
+    fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i32(v)
+    }
+
+    fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i64(v)
+    }
+
+    fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u8(v)
+    }
+
+    fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u16(v)
+    }
+
+    fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u32(v)
+    }
+
+    fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u64(v)
+    }
+
+    fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_f32(v)
+    }
+
+    fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_f64(v)
+    }
+
+    fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_char(v)
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_str(v)
+    }
+
+    fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_bytes(value)
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        *self.is_none = true;
+        Err(Error::unsupported_none())
+    }
+
+    fn serialize_some<T>(self, value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        ValueSerializer::new().serialize_some(value)
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_unit()
+    }
+
+    fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_unit_struct(name)
+    }
+
+    fn serialize_unit_variant(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_unit_variant(name, variant_index, variant)
+    }
+
+    fn serialize_newtype_struct<T>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        ValueSerializer::new().serialize_newtype_variant(name, variant_index, variant, value)
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        ValueSerializer::new().serialize_seq(len)
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        ValueSerializer::new().serialize_tuple(len)
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        ValueSerializer::new().serialize_tuple_struct(name, len)
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        ValueSerializer::new().serialize_tuple_variant(name, variant_index, variant, len)
+    }
+
+    fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        ValueSerializer::new().serialize_map(len)
+    }
+
+    fn serialize_struct(
+        self,
+        name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        ValueSerializer::new().serialize_struct(name, len)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        ValueSerializer::new().serialize_struct_variant(name, variant_index, variant, len)
+    }
+}
+
+pub struct SerializeStructVariant {
+    variant: &'static str,
+    inner: SerializeInlineTable,
+}
+
+impl SerializeStructVariant {
+    pub(crate) fn struct_(variant: &'static str, len: usize) -> Self {
+        Self {
+            variant,
+            inner: SerializeInlineTable::map(Some(len)),
+        }
+    }
+}
+
+impl serde::ser::SerializeStructVariant for SerializeStructVariant {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    #[inline]
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        serde::ser::SerializeStruct::serialize_field(&mut self.inner, key, value)
+    }
+
+    #[inline]
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let inner = serde::ser::SerializeStruct::end(self.inner)?.into();
+        let mut items = crate::table::KeyValuePairs::new();
+        let value = crate::Item::Value(inner);
+        items.insert(crate::Key::new(self.variant), value);
+        Ok(crate::Value::InlineTable(crate::InlineTable::with_pairs(
+            items,
+        )))
+    }
+}

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

@@ -0,0 +1,188 @@
+//! Serializing Rust structures into TOML.
+//!
+//! This module contains all the Serde support for serializing Rust structures into TOML.
+
+mod array;
+mod key;
+mod map;
+mod pretty;
+mod value;
+
+use crate::visit_mut::VisitMut as _;
+#[allow(clippy::wildcard_imports)]
+use array::*;
+#[allow(clippy::wildcard_imports)]
+use map::*;
+
+pub use value::ValueSerializer;
+
+/// Serialize the given data structure as a TOML byte vector.
+///
+/// Serialization can fail if `T`'s implementation of `Serialize` decides to
+/// fail, if `T` contains a map with non-string keys, or if `T` attempts to
+/// serialize an unsupported datatype such as an enum, tuple, or tuple struct.
+#[cfg(feature = "display")]
+pub fn to_vec<T>(value: &T) -> Result<Vec<u8>, Error>
+where
+    T: serde::ser::Serialize + ?Sized,
+{
+    to_string(value).map(|e| e.into_bytes())
+}
+
+/// Serialize the given data structure as a String of TOML.
+///
+/// Serialization can fail if `T`'s implementation of `Serialize` decides to
+/// fail, if `T` contains a map with non-string keys, or if `T` attempts to
+/// serialize an unsupported datatype such as an enum, tuple, or tuple struct.
+///
+/// # Examples
+///
+/// ```
+/// use serde::Serialize;
+///
+/// #[derive(Serialize)]
+/// struct Config {
+///     database: Database,
+/// }
+///
+/// #[derive(Serialize)]
+/// struct Database {
+///     ip: String,
+///     port: Vec<u16>,
+///     connection_max: u32,
+///     enabled: bool,
+/// }
+///
+/// let config = Config {
+///     database: Database {
+///         ip: "192.168.1.1".to_string(),
+///         port: vec![8001, 8002, 8003],
+///         connection_max: 5000,
+///         enabled: false,
+///     },
+/// };
+///
+/// let toml = toml_edit::ser::to_string(&config).unwrap();
+/// println!("{}", toml)
+/// ```
+#[cfg(feature = "display")]
+pub fn to_string<T>(value: &T) -> Result<String, Error>
+where
+    T: serde::ser::Serialize + ?Sized,
+{
+    to_document(value).map(|e| e.to_string())
+}
+
+/// Serialize the given data structure as a "pretty" String of TOML.
+///
+/// This is identical to `to_string` except the output string has a more
+/// "pretty" output. See `ValueSerializer::pretty` for more details.
+#[cfg(feature = "display")]
+pub fn to_string_pretty<T>(value: &T) -> Result<String, Error>
+where
+    T: serde::ser::Serialize + ?Sized,
+{
+    let mut document = to_document(value)?;
+    pretty::Pretty::new().visit_document_mut(&mut document);
+    Ok(document.to_string())
+}
+
+/// Serialize the given data structure into a TOML document.
+///
+/// This would allow custom formatting to be applied, mixing with format preserving edits, etc.
+pub fn to_document<T>(value: &T) -> Result<crate::DocumentMut, Error>
+where
+    T: serde::ser::Serialize + ?Sized,
+{
+    let value = value.serialize(ValueSerializer::new())?;
+    let item = crate::Item::Value(value);
+    let root = item
+        .into_table()
+        .map_err(|_| Error::UnsupportedType(None))?;
+    Ok(root.into())
+}
+
+/// Errors that can occur when deserializing a type.
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum Error {
+    /// Type could not be serialized to TOML
+    UnsupportedType(Option<&'static str>),
+    /// Value was out of range for the given type
+    OutOfRange(Option<&'static str>),
+    /// `None` could not be serialized to TOML
+    UnsupportedNone,
+    /// Key was not convertible to `String` for serializing to TOML
+    KeyNotString,
+    /// A serialized date was invalid
+    DateInvalid,
+    /// Other serialization error
+    Custom(String),
+}
+
+impl Error {
+    pub(crate) fn custom<T>(msg: T) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Error::Custom(msg.to_string())
+    }
+
+    pub(crate) fn unsupported_type(t: Option<&'static str>) -> Self {
+        Error::UnsupportedType(t)
+    }
+
+    fn out_of_range(t: Option<&'static str>) -> Self {
+        Error::OutOfRange(t)
+    }
+
+    pub(crate) fn unsupported_none() -> Self {
+        Error::UnsupportedNone
+    }
+
+    pub(crate) fn key_not_string() -> Self {
+        Error::KeyNotString
+    }
+
+    fn date_invalid() -> Self {
+        Error::DateInvalid
+    }
+}
+
+impl serde::ser::Error for Error {
+    fn custom<T>(msg: T) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Self::custom(msg)
+    }
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::UnsupportedType(Some(t)) => write!(formatter, "unsupported {t} type"),
+            Self::UnsupportedType(None) => write!(formatter, "unsupported rust type"),
+            Self::OutOfRange(Some(t)) => write!(formatter, "out-of-range value for {t} type"),
+            Self::OutOfRange(None) => write!(formatter, "out-of-range value"),
+            Self::UnsupportedNone => "unsupported None value".fmt(formatter),
+            Self::KeyNotString => "map key was not a string".fmt(formatter),
+            Self::DateInvalid => "a serialized date was invalid".fmt(formatter),
+            Self::Custom(s) => s.fmt(formatter),
+        }
+    }
+}
+
+impl From<crate::TomlError> for Error {
+    fn from(e: crate::TomlError) -> Error {
+        Self::custom(e)
+    }
+}
+
+impl From<Error> for crate::TomlError {
+    fn from(e: Error) -> crate::TomlError {
+        Self::custom(e.to_string(), None)
+    }
+}
+
+impl std::error::Error for Error {}

vendor/toml_edit-0.22.27/src/ser/pretty.rs

@@ -0,0 +1,58 @@
+pub(crate) struct Pretty {
+    in_value: bool,
+}
+
+impl Pretty {
+    pub(crate) fn new() -> Self {
+        Self { in_value: false }
+    }
+}
+
+impl crate::visit_mut::VisitMut for Pretty {
+    fn visit_document_mut(&mut self, node: &mut crate::DocumentMut) {
+        crate::visit_mut::visit_document_mut(self, node);
+    }
+
+    fn visit_item_mut(&mut self, node: &mut crate::Item) {
+        if !self.in_value {
+            node.make_item();
+        }
+
+        crate::visit_mut::visit_item_mut(self, node);
+    }
+
+    fn visit_table_mut(&mut self, node: &mut crate::Table) {
+        node.decor_mut().clear();
+
+        // Empty tables could be semantically meaningful, so make sure they are not implicit
+        if !node.is_empty() {
+            node.set_implicit(true);
+        }
+
+        crate::visit_mut::visit_table_mut(self, node);
+    }
+
+    fn visit_value_mut(&mut self, node: &mut crate::Value) {
+        node.decor_mut().clear();
+
+        let old_in_value = self.in_value;
+        self.in_value = true;
+        crate::visit_mut::visit_value_mut(self, node);
+        self.in_value = old_in_value;
+    }
+
+    fn visit_array_mut(&mut self, node: &mut crate::Array) {
+        crate::visit_mut::visit_array_mut(self, node);
+
+        if (0..=1).contains(&node.len()) {
+            node.set_trailing("");
+            node.set_trailing_comma(false);
+        } else {
+            for item in node.iter_mut() {
+                item.decor_mut().set_prefix("\n    ");
+            }
+            node.set_trailing("\n");
+            node.set_trailing_comma(true);
+        }
+    }
+}

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

@@ -0,0 +1,249 @@
+use super::Error;
+use super::SerializeMap;
+use super::SerializeStructVariant;
+use super::SerializeTupleVariant;
+use super::SerializeValueArray;
+
+/// Serialization for TOML [values][crate::Value].
+///
+/// This structure implements serialization support for TOML to serialize an
+/// arbitrary type to TOML. Note that the TOML format does not support all
+/// datatypes in Rust, such as enums, tuples, and tuple structs. These types
+/// will generate an error when serialized.
+///
+/// Currently a serializer always writes its output to an in-memory `String`,
+/// which is passed in when creating the serializer itself.
+///
+/// # Examples
+///
+/// ```
+/// # #[cfg(feature = "parse")] {
+/// # #[cfg(feature = "display")] {
+/// use serde::Serialize;
+///
+/// #[derive(Serialize)]
+/// struct Config {
+///     database: Database,
+/// }
+///
+/// #[derive(Serialize)]
+/// struct Database {
+///     ip: String,
+///     port: Vec<u16>,
+///     connection_max: u32,
+///     enabled: bool,
+/// }
+///
+/// let config = Config {
+///     database: Database {
+///         ip: "192.168.1.1".to_string(),
+///         port: vec![8001, 8002, 8003],
+///         connection_max: 5000,
+///         enabled: false,
+///     },
+/// };
+///
+/// let value = serde::Serialize::serialize(
+///     &config,
+///     toml_edit::ser::ValueSerializer::new()
+/// ).unwrap();
+/// println!("{}", value)
+/// # }
+/// # }
+/// ```
+#[derive(Default)]
+#[non_exhaustive]
+pub struct ValueSerializer {}
+
+impl ValueSerializer {
+    /// Creates a new serializer generate a TOML document.
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+impl serde::ser::Serializer for ValueSerializer {
+    type Ok = crate::Value;
+    type Error = Error;
+    type SerializeSeq = SerializeValueArray;
+    type SerializeTuple = SerializeValueArray;
+    type SerializeTupleStruct = SerializeValueArray;
+    type SerializeTupleVariant = SerializeTupleVariant;
+    type SerializeMap = SerializeMap;
+    type SerializeStruct = SerializeMap;
+    type SerializeStructVariant = SerializeStructVariant;
+
+    fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
+        let v: i64 = v
+            .try_into()
+            .map_err(|_err| Error::out_of_range(Some("u64")))?;
+        self.serialize_i64(v)
+    }
+
+    fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
+        self.serialize_f64(v as f64)
+    }
+
+    fn serialize_f64(self, mut v: f64) -> Result<Self::Ok, Self::Error> {
+        // Discard sign of NaN when serialized using Serde.
+        //
+        // In all likelihood the sign of NaNs is not meaningful in the user's
+        // program. Ending up with `-nan` in the TOML document would usually be
+        // surprising and undesirable, when the sign of the NaN was not
+        // intentionally controlled by the caller, or may even be
+        // nondeterministic if it comes from arithmetic operations or a cast.
+        if v.is_nan() {
+            v = v.copysign(1.0);
+        }
+        Ok(v.into())
+    }
+
+    fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
+        let mut buf = [0; 4];
+        self.serialize_str(v.encode_utf8(&mut buf))
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        use serde::ser::Serialize;
+        value.serialize(self)
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::unsupported_none())
+    }
+
+    fn serialize_some<T>(self, value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::unsupported_type(Some("unit")))
+    }
+
+    fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(Error::unsupported_type(Some(name)))
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        self.serialize_str(variant)
+    }
+
+    fn serialize_newtype_struct<T>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize + ?Sized,
+    {
+        let value = value.serialize(self)?;
+        let mut table = crate::InlineTable::new();
+        table.insert(variant, value);
+        Ok(table.into())
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Ok(SerializeValueArray::seq(len))
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Ok(SerializeTupleVariant::tuple(variant, len))
+    }
+
+    fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Ok(SerializeMap::map(len))
+    }
+
+    fn serialize_struct(
+        self,
+        name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Ok(SerializeMap::struct_(name, Some(len)))
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Ok(SerializeStructVariant::struct_(variant, len))
+    }
+}