add SPA config UI, wire media/rss adapters, event-driven layout push

- React SPA: dashboard, data sources CRUD, widgets CRUD, layout builder,
  presets. TanStack Router + Query, shadcn/ui, Vite proxy to :3000
- wire media + rss adapters into polling loop, remove xtb source type
- media adapter: read username/password from headers, proper subsonic auth
- event handler: subscribe to LayoutChanged, push screen update to clients
- fix clippy warnings across workspace (Default impls, collapsible ifs,
  redundant closures, is_none_or, unused imports)

Cargo.lock

@@ -166,6 +166,8 @@ dependencies = [
  "dotenvy",
  "http-api",
  "http-json",
+ "media-adapter",
+ "rss-adapter",
  "tcp-server",
  "tokio",
  "tracing",
@@ -1102,12 +1104,20 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "md5"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
+
 [[package]]
 name = "media-adapter"
 version = "0.1.0"
 dependencies = [
  "axum",
  "domain",
+ "fastrand",
+ "md5",
  "reqwest",
  "serde_json",
  "thiserror",

Cargo.toml

@@ -36,6 +36,8 @@ display-terminal = { path = "crates/adapters/display-terminal" }
 config-sqlite = { path = "crates/adapters/config-sqlite" }
 http-json = { path = "crates/adapters/http-json" }
 http-api = { path = "crates/adapters/http-api" }
+media-adapter = { path = "crates/adapters/media" }
+rss-adapter = { path = "crates/adapters/rss" }
 axum = { version = "0.8", features = ["macros"] }
 tower-http = { version = "0.6", features = ["cors"] }
 api-types = { path = "crates/api-types" }

crates/adapters/config-memory/src/lib.rs

@@ -1,10 +1,9 @@
+use domain::{
+    ConfigRepository, DataSource, DataSourceId, Layout, LayoutPreset, LayoutPresetId, WidgetConfig,
+    WidgetId,
+};
 use std::collections::HashMap;
 use std::sync::RwLock;
-use domain::{
-    ConfigRepository,
-    DataSource, DataSourceId, Layout, LayoutPreset, LayoutPresetId,
-    WidgetConfig, WidgetId,
-};
 
 #[derive(Debug, thiserror::Error)]
 pub enum MemoryConfigError {
@@ -19,8 +18,8 @@ pub struct MemoryConfigStore {
     presets: RwLock<HashMap<LayoutPresetId, LayoutPreset>>,
 }
 
-impl MemoryConfigStore {
-    pub fn new() -> Self {
+impl Default for MemoryConfigStore {
+    fn default() -> Self {
         Self {
             widgets: RwLock::new(HashMap::new()),
             data_sources: RwLock::new(HashMap::new()),
@@ -30,82 +29,130 @@ impl MemoryConfigStore {
     }
 }
 
+impl MemoryConfigStore {
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
 impl ConfigRepository for MemoryConfigStore {
     type Error = MemoryConfigError;
 
     async fn get_widget(&self, id: WidgetId) -> Result<Option<WidgetConfig>, Self::Error> {
-        let guard = self.widgets.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .widgets
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.get(&id).cloned())
     }
 
     async fn list_widgets(&self) -> Result<Vec<WidgetConfig>, Self::Error> {
-        let guard = self.widgets.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .widgets
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.values().cloned().collect())
     }
 
     async fn save_widget(&self, config: &WidgetConfig) -> Result<(), Self::Error> {
-        let mut guard = self.widgets.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .widgets
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         guard.insert(config.id, config.clone());
         Ok(())
     }
 
     async fn delete_widget(&self, id: WidgetId) -> Result<(), Self::Error> {
-        let mut guard = self.widgets.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .widgets
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         guard.remove(&id);
         Ok(())
     }
 
     async fn get_data_source(&self, id: DataSourceId) -> Result<Option<DataSource>, Self::Error> {
-        let guard = self.data_sources.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .data_sources
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.get(&id).cloned())
     }
 
     async fn list_data_sources(&self) -> Result<Vec<DataSource>, Self::Error> {
-        let guard = self.data_sources.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .data_sources
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.values().cloned().collect())
     }
 
     async fn save_data_source(&self, source: &DataSource) -> Result<(), Self::Error> {
-        let mut guard = self.data_sources.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .data_sources
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         guard.insert(source.id, source.clone());
         Ok(())
     }
 
     async fn delete_data_source(&self, id: DataSourceId) -> Result<(), Self::Error> {
-        let mut guard = self.data_sources.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .data_sources
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         guard.remove(&id);
         Ok(())
     }
 
     async fn get_layout(&self) -> Result<Option<Layout>, Self::Error> {
-        let guard = self.layout.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .layout
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.clone())
     }
 
     async fn save_layout(&self, layout: &Layout) -> Result<(), Self::Error> {
-        let mut guard = self.layout.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .layout
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         *guard = Some(layout.clone());
         Ok(())
     }
 
     async fn get_preset(&self, id: LayoutPresetId) -> Result<Option<LayoutPreset>, Self::Error> {
-        let guard = self.presets.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .presets
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.get(&id).cloned())
     }
 
     async fn list_presets(&self) -> Result<Vec<LayoutPreset>, Self::Error> {
-        let guard = self.presets.read().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let guard = self
+            .presets
+            .read()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         Ok(guard.values().cloned().collect())
     }
 
     async fn save_preset(&self, preset: &LayoutPreset) -> Result<(), Self::Error> {
-        let mut guard = self.presets.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .presets
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         guard.insert(preset.id, preset.clone());
         Ok(())
     }
 
     async fn delete_preset(&self, id: LayoutPresetId) -> Result<(), Self::Error> {
-        let mut guard = self.presets.write().map_err(|_| MemoryConfigError::LockPoisoned)?;
+        let mut guard = self
+            .presets
+            .write()
+            .map_err(|_| MemoryConfigError::LockPoisoned)?;
         guard.remove(&id);
         Ok(())
     }

crates/adapters/config-sqlite/src/lib.rs

@@ -1,6 +1,6 @@
 pub mod error;
-mod serialization;
 mod repository;
+mod serialization;
 
 use sqlx::SqlitePool;
 
@@ -27,8 +27,10 @@ impl SqliteConfigStore {
                 data_source_id INTEGER NOT NULL,
                 mappings TEXT NOT NULL,
                 max_data_size INTEGER NOT NULL
-            )"
-        ).execute(&self.pool).await?;
+            )",
+        )
+        .execute(&self.pool)
+        .await?;
 
         sqlx::query(
             "CREATE TABLE IF NOT EXISTS data_sources (
@@ -37,23 +39,29 @@ impl SqliteConfigStore {
                 source_type TEXT NOT NULL,
                 poll_interval_secs INTEGER NOT NULL,
                 config TEXT NOT NULL
-            )"
-        ).execute(&self.pool).await?;
+            )",
+        )
+        .execute(&self.pool)
+        .await?;
 
         sqlx::query(
             "CREATE TABLE IF NOT EXISTS layout (
                 id INTEGER PRIMARY KEY CHECK (id = 1),
                 data TEXT NOT NULL
-            )"
-        ).execute(&self.pool).await?;
+            )",
+        )
+        .execute(&self.pool)
+        .await?;
 
         sqlx::query(
             "CREATE TABLE IF NOT EXISTS presets (
                 id INTEGER PRIMARY KEY,
                 name TEXT NOT NULL,
                 layout_data TEXT NOT NULL
-            )"
-        ).execute(&self.pool).await?;
+            )",
+        )
+        .execute(&self.pool)
+        .await?;
 
         Ok(())
     }

crates/adapters/config-sqlite/src/repository/data_sources.rs

@@ -1,10 +1,13 @@
-use domain::{DataSource, DataSourceId};
 use crate::SqliteConfigStore;
 use crate::error::SqliteConfigError;
 use crate::serialization::data_source as ser;
+use domain::{DataSource, DataSourceId};
 
 impl SqliteConfigStore {
-    pub(crate) async fn get_data_source_impl(&self, id: DataSourceId) -> Result<Option<DataSource>, SqliteConfigError> {
+    pub(crate) async fn get_data_source_impl(
+        &self,
+        id: DataSourceId,
+    ) -> Result<Option<DataSource>, SqliteConfigError> {
         let row = sqlx::query("SELECT * FROM data_sources WHERE id = ?")
             .bind(id as i64)
             .fetch_optional(&self.pool)
@@ -17,16 +20,21 @@ impl SqliteConfigStore {
         }
     }
 
-    pub(crate) async fn list_data_sources_impl(&self) -> Result<Vec<DataSource>, SqliteConfigError> {
+    pub(crate) async fn list_data_sources_impl(
+        &self,
+    ) -> Result<Vec<DataSource>, SqliteConfigError> {
         let rows = sqlx::query("SELECT * FROM data_sources")
             .fetch_all(&self.pool)
             .await
             .map_err(SqliteConfigError::Sql)?;
 
-        rows.iter().map(|r| ser::data_source_from_row(r)).collect()
+        rows.iter().map(ser::data_source_from_row).collect()
     }
 
-    pub(crate) async fn save_data_source_impl(&self, source: &DataSource) -> Result<(), SqliteConfigError> {
+    pub(crate) async fn save_data_source_impl(
+        &self,
+        source: &DataSource,
+    ) -> Result<(), SqliteConfigError> {
         let config_json = ser::data_source_config_to_json(&source.config)?;
         let type_str = ser::data_source_type_to_str(&source.source_type);
 
@@ -46,7 +54,10 @@ impl SqliteConfigStore {
         Ok(())
     }
 
-    pub(crate) async fn delete_data_source_impl(&self, id: DataSourceId) -> Result<(), SqliteConfigError> {
+    pub(crate) async fn delete_data_source_impl(
+        &self,
+        id: DataSourceId,
+    ) -> Result<(), SqliteConfigError> {
         sqlx::query("DELETE FROM data_sources WHERE id = ?")
             .bind(id as i64)
             .execute(&self.pool)

crates/adapters/config-sqlite/src/repository/layout.rs

@@ -1,8 +1,8 @@
-use sqlx::Row;
-use domain::Layout;
 use crate::SqliteConfigStore;
 use crate::error::SqliteConfigError;
 use crate::serialization::layout as ser;
+use domain::Layout;
+use sqlx::Row;
 
 impl SqliteConfigStore {
     pub(crate) async fn get_layout_impl(&self) -> Result<Option<Layout>, SqliteConfigError> {
@@ -23,13 +23,11 @@ impl SqliteConfigStore {
     pub(crate) async fn save_layout_impl(&self, layout: &Layout) -> Result<(), SqliteConfigError> {
         let json = ser::layout_to_json(layout)?;
 
-        sqlx::query(
-            "INSERT OR REPLACE INTO layout (id, data) VALUES (1, ?)"
-        )
-        .bind(&json)
-        .execute(&self.pool)
-        .await
-        .map_err(SqliteConfigError::Sql)?;
+        sqlx::query("INSERT OR REPLACE INTO layout (id, data) VALUES (1, ?)")
+            .bind(&json)
+            .execute(&self.pool)
+            .await
+            .map_err(SqliteConfigError::Sql)?;
 
         Ok(())
     }

crates/adapters/config-sqlite/src/repository/mod.rs

@@ -1,16 +1,14 @@
-mod widgets;
 mod data_sources;
 mod layout;
 mod presets;
+mod widgets;
 
-use domain::{
-    ConfigRepository,
-    DataSource, DataSourceId,
-    Layout, LayoutPreset, LayoutPresetId,
-    WidgetConfig, WidgetId,
-};
 use crate::SqliteConfigStore;
 use crate::error::SqliteConfigError;
+use domain::{
+    ConfigRepository, DataSource, DataSourceId, Layout, LayoutPreset, LayoutPresetId, WidgetConfig,
+    WidgetId,
+};
 
 impl ConfigRepository for SqliteConfigStore {
     type Error = SqliteConfigError;

crates/adapters/config-sqlite/src/repository/presets.rs

@@ -1,10 +1,13 @@
-use domain::{LayoutPreset, LayoutPresetId};
 use crate::SqliteConfigStore;
 use crate::error::SqliteConfigError;
 use crate::serialization::{layout as layout_ser, preset as ser};
+use domain::{LayoutPreset, LayoutPresetId};
 
 impl SqliteConfigStore {
-    pub(crate) async fn get_preset_impl(&self, id: LayoutPresetId) -> Result<Option<LayoutPreset>, SqliteConfigError> {
+    pub(crate) async fn get_preset_impl(
+        &self,
+        id: LayoutPresetId,
+    ) -> Result<Option<LayoutPreset>, SqliteConfigError> {
         let row = sqlx::query("SELECT * FROM presets WHERE id = ?")
             .bind(id as i64)
             .fetch_optional(&self.pool)
@@ -23,26 +26,30 @@ impl SqliteConfigStore {
             .await
             .map_err(SqliteConfigError::Sql)?;
 
-        rows.iter().map(|r| ser::preset_from_row(r)).collect()
+        rows.iter().map(ser::preset_from_row).collect()
     }
 
-    pub(crate) async fn save_preset_impl(&self, preset: &LayoutPreset) -> Result<(), SqliteConfigError> {
+    pub(crate) async fn save_preset_impl(
+        &self,
+        preset: &LayoutPreset,
+    ) -> Result<(), SqliteConfigError> {
         let layout_json = layout_ser::layout_to_json(&preset.layout)?;
 
-        sqlx::query(
-            "INSERT OR REPLACE INTO presets (id, name, layout_data) VALUES (?, ?, ?)"
-        )
-        .bind(preset.id as i64)
-        .bind(&preset.name)
-        .bind(&layout_json)
-        .execute(&self.pool)
-        .await
-        .map_err(SqliteConfigError::Sql)?;
+        sqlx::query("INSERT OR REPLACE INTO presets (id, name, layout_data) VALUES (?, ?, ?)")
+            .bind(preset.id as i64)
+            .bind(&preset.name)
+            .bind(&layout_json)
+            .execute(&self.pool)
+            .await
+            .map_err(SqliteConfigError::Sql)?;
 
         Ok(())
     }
 
-    pub(crate) async fn delete_preset_impl(&self, id: LayoutPresetId) -> Result<(), SqliteConfigError> {
+    pub(crate) async fn delete_preset_impl(
+        &self,
+        id: LayoutPresetId,
+    ) -> Result<(), SqliteConfigError> {
         sqlx::query("DELETE FROM presets WHERE id = ?")
             .bind(id as i64)
             .execute(&self.pool)

crates/adapters/config-sqlite/src/repository/widgets.rs

@@ -1,10 +1,13 @@
-use domain::{WidgetConfig, WidgetId};
 use crate::SqliteConfigStore;
 use crate::error::SqliteConfigError;
 use crate::serialization::widget as ser;
+use domain::{WidgetConfig, WidgetId};
 
 impl SqliteConfigStore {
-    pub(crate) async fn get_widget_impl(&self, id: WidgetId) -> Result<Option<WidgetConfig>, SqliteConfigError> {
+    pub(crate) async fn get_widget_impl(
+        &self,
+        id: WidgetId,
+    ) -> Result<Option<WidgetConfig>, SqliteConfigError> {
         let row = sqlx::query("SELECT * FROM widgets WHERE id = ?")
             .bind(id as i64)
             .fetch_optional(&self.pool)
@@ -23,10 +26,13 @@ impl SqliteConfigStore {
             .await
             .map_err(SqliteConfigError::Sql)?;
 
-        rows.iter().map(|r| ser::widget_from_row(r)).collect()
+        rows.iter().map(ser::widget_from_row).collect()
     }
 
-    pub(crate) async fn save_widget_impl(&self, config: &WidgetConfig) -> Result<(), SqliteConfigError> {
+    pub(crate) async fn save_widget_impl(
+        &self,
+        config: &WidgetConfig,
+    ) -> Result<(), SqliteConfigError> {
         let mappings_json = ser::mappings_to_json(&config.mappings)?;
         let hint_str = ser::display_hint_to_str(&config.display_hint);
 

crates/adapters/config-sqlite/src/serialization/data_source.rs

@@ -1,14 +1,13 @@
-use std::time::Duration;
+use crate::error::SqliteConfigError;
+use domain::{DataSource, DataSourceConfig, DataSourceType};
 use sqlx::Row;
 use sqlx::sqlite::SqliteRow;
-use domain::{DataSource, DataSourceConfig, DataSourceType};
-use crate::error::SqliteConfigError;
+use std::time::Duration;
 
 pub fn data_source_type_to_str(t: &DataSourceType) -> &'static str {
     match t {
         DataSourceType::Weather => "weather",
         DataSourceType::Media => "media",
-        DataSourceType::Xtb => "xtb",
         DataSourceType::Rss => "rss",
         DataSourceType::HttpJson => "http_json",
         DataSourceType::Webhook => "webhook",
@@ -19,11 +18,12 @@ fn data_source_type_from_str(s: &str) -> Result<DataSourceType, SqliteConfigErro
     match s {
         "weather" => Ok(DataSourceType::Weather),
         "media" => Ok(DataSourceType::Media),
-        "xtb" => Ok(DataSourceType::Xtb),
         "rss" => Ok(DataSourceType::Rss),
         "http_json" => Ok(DataSourceType::HttpJson),
         "webhook" => Ok(DataSourceType::Webhook),
-        _ => Err(SqliteConfigError::Serialization(format!("unknown source type: {s}"))),
+        _ => Err(SqliteConfigError::Serialization(format!(
+            "unknown source type: {s}"
+        ))),
     }
 }
 
@@ -37,20 +37,27 @@ pub fn data_source_config_to_json(config: &DataSourceConfig) -> Result<String, S
 }
 
 fn data_source_config_from_json(json: &str) -> Result<DataSourceConfig, SqliteConfigError> {
-    let v: serde_json::Value = serde_json::from_str(json)
-        .map_err(|e| SqliteConfigError::Serialization(e.to_string()))?;
+    let v: serde_json::Value =
+        serde_json::from_str(json).map_err(|e| SqliteConfigError::Serialization(e.to_string()))?;
 
     let url = v["url"].as_str().map(String::from);
     let api_key = v["api_key"].as_str().map(String::from);
     let headers = match v["headers"].as_array() {
-        Some(arr) => arr.iter().filter_map(|h| {
-            let pair = h.as_array()?;
-            Some((pair[0].as_str()?.into(), pair[1].as_str()?.into()))
-        }).collect(),
+        Some(arr) => arr
+            .iter()
+            .filter_map(|h| {
+                let pair = h.as_array()?;
+                Some((pair[0].as_str()?.into(), pair[1].as_str()?.into()))
+            })
+            .collect(),
         None => vec![],
     };
 
-    Ok(DataSourceConfig { url, headers, api_key })
+    Ok(DataSourceConfig {
+        url,
+        headers,
+        api_key,
+    })
 }
 
 pub fn data_source_from_row(row: &SqliteRow) -> Result<DataSource, SqliteConfigError> {

crates/adapters/config-sqlite/src/serialization/layout.rs

@@ -1,5 +1,5 @@
-use domain::{ContainerNode, Direction, Layout, LayoutChild, LayoutNode, Sizing};
 use crate::error::SqliteConfigError;
+use domain::{ContainerNode, Direction, Layout, LayoutChild, LayoutNode, Sizing};
 
 pub fn layout_to_json(layout: &Layout) -> Result<String, SqliteConfigError> {
     let v = node_to_json(&layout.root);
@@ -7,8 +7,8 @@ pub fn layout_to_json(layout: &Layout) -> Result<String, SqliteConfigError> {
 }
 
 pub fn layout_from_json(json: &str) -> Result<Layout, SqliteConfigError> {
-    let v: serde_json::Value = serde_json::from_str(json)
-        .map_err(|e| SqliteConfigError::Serialization(e.to_string()))?;
+    let v: serde_json::Value =
+        serde_json::from_str(json).map_err(|e| SqliteConfigError::Serialization(e.to_string()))?;
     let root = node_from_json(&v)?;
     Ok(Layout { root })
 }
@@ -17,16 +17,20 @@ fn node_to_json(node: &LayoutNode) -> serde_json::Value {
     match node {
         LayoutNode::Leaf(id) => serde_json::json!({ "type": "leaf", "widget_id": id }),
         LayoutNode::Container(c) => {
-            let children: Vec<serde_json::Value> = c.children.iter().map(|ch| {
-                let sizing = match &ch.sizing {
-                    Sizing::Fixed(px) => serde_json::json!({ "type": "fixed", "value": px }),
-                    Sizing::Flex(w) => serde_json::json!({ "type": "flex", "value": w }),
-                };
-                serde_json::json!({
-                    "sizing": sizing,
-                    "node": node_to_json(&ch.node),
+            let children: Vec<serde_json::Value> = c
+                .children
+                .iter()
+                .map(|ch| {
+                    let sizing = match &ch.sizing {
+                        Sizing::Fixed(px) => serde_json::json!({ "type": "fixed", "value": px }),
+                        Sizing::Flex(w) => serde_json::json!({ "type": "flex", "value": w }),
+                    };
+                    serde_json::json!({
+                        "sizing": sizing,
+                        "node": node_to_json(&ch.node),
+                    })
                 })
-            }).collect();
+                .collect();
 
             serde_json::json!({
                 "type": "container",
@@ -44,25 +48,44 @@ fn node_from_json(v: &serde_json::Value) -> Result<LayoutNode, SqliteConfigError
 
     match v["type"].as_str().ok_or_else(|| err("missing node type"))? {
         "leaf" => {
-            let id = v["widget_id"].as_u64().ok_or_else(|| err("missing widget_id"))? as u16;
+            let id = v["widget_id"]
+                .as_u64()
+                .ok_or_else(|| err("missing widget_id"))? as u16;
             Ok(LayoutNode::Leaf(id))
         }
         "container" => {
-            let direction = match v["direction"].as_str().ok_or_else(|| err("missing direction"))? {
+            let direction = match v["direction"]
+                .as_str()
+                .ok_or_else(|| err("missing direction"))?
+            {
                 "row" => Direction::Row,
                 "column" => Direction::Column,
                 d => return Err(err(&format!("unknown direction: {d}"))),
             };
             let gap = v["gap"].as_u64().unwrap_or(0) as u8;
             let padding = v["padding"].as_u64().unwrap_or(0) as u8;
-            let children = v["children"].as_array()
+            let children = v["children"]
+                .as_array()
                 .ok_or_else(|| err("missing children"))?
                 .iter()
                 .map(|ch| {
                     let sizing_v = &ch["sizing"];
-                    let sizing = match sizing_v["type"].as_str().ok_or_else(|| err("missing sizing type"))? {
-                        "fixed" => Sizing::Fixed(sizing_v["value"].as_u64().ok_or_else(|| err("missing fixed value"))? as u16),
-                        "flex" => Sizing::Flex(sizing_v["value"].as_u64().ok_or_else(|| err("missing flex value"))? as u8),
+                    let sizing = match sizing_v["type"]
+                        .as_str()
+                        .ok_or_else(|| err("missing sizing type"))?
+                    {
+                        "fixed" => Sizing::Fixed(
+                            sizing_v["value"]
+                                .as_u64()
+                                .ok_or_else(|| err("missing fixed value"))?
+                                as u16,
+                        ),
+                        "flex" => Sizing::Flex(
+                            sizing_v["value"]
+                                .as_u64()
+                                .ok_or_else(|| err("missing flex value"))?
+                                as u8,
+                        ),
                         s => return Err(err(&format!("unknown sizing: {s}"))),
                     };
                     let node = node_from_json(&ch["node"])?;
@@ -70,7 +93,12 @@ fn node_from_json(v: &serde_json::Value) -> Result<LayoutNode, SqliteConfigError
                 })
                 .collect::<Result<Vec<_>, _>>()?;
 
-            Ok(LayoutNode::Container(ContainerNode { direction, gap, padding, children }))
+            Ok(LayoutNode::Container(ContainerNode {
+                direction,
+                gap,
+                padding,
+                children,
+            }))
         }
         t => Err(err(&format!("unknown node type: {t}"))),
     }

crates/adapters/config-sqlite/src/serialization/mod.rs

@@ -1,4 +1,4 @@
-pub mod widget;
 pub mod data_source;
 pub mod layout;
 pub mod preset;
+pub mod widget;

crates/adapters/config-sqlite/src/serialization/preset.rs

@@ -1,8 +1,8 @@
+use super::layout::layout_from_json;
+use crate::error::SqliteConfigError;
+use domain::LayoutPreset;
 use sqlx::Row;
 use sqlx::sqlite::SqliteRow;
-use domain::LayoutPreset;
-use crate::error::SqliteConfigError;
-use super::layout::layout_from_json;
 
 pub fn preset_from_row(row: &SqliteRow) -> Result<LayoutPreset, SqliteConfigError> {
     let id: i64 = row.get("id");

crates/adapters/config-sqlite/src/serialization/widget.rs

@@ -1,7 +1,7 @@
+use crate::error::SqliteConfigError;
+use domain::{DisplayHint, KeyMapping, WidgetConfig};
 use sqlx::Row;
 use sqlx::sqlite::SqliteRow;
-use domain::{DisplayHint, KeyMapping, WidgetConfig};
-use crate::error::SqliteConfigError;
 
 pub fn display_hint_to_str(hint: &DisplayHint) -> &'static str {
     match hint {
@@ -16,32 +16,44 @@ fn display_hint_from_str(s: &str) -> Result<DisplayHint, SqliteConfigError> {
         "icon_value" => Ok(DisplayHint::IconValue),
         "text_block" => Ok(DisplayHint::TextBlock),
         "key_value" => Ok(DisplayHint::KeyValue),
-        _ => Err(SqliteConfigError::Serialization(format!("unknown display hint: {s}"))),
+        _ => Err(SqliteConfigError::Serialization(format!(
+            "unknown display hint: {s}"
+        ))),
     }
 }
 
 pub fn mappings_to_json(mappings: &[KeyMapping]) -> Result<String, SqliteConfigError> {
-    let entries: Vec<serde_json::Value> = mappings.iter().map(|m| {
-        serde_json::json!({
-            "source_path": m.source_path,
-            "target_key": m.target_key,
+    let entries: Vec<serde_json::Value> = mappings
+        .iter()
+        .map(|m| {
+            serde_json::json!({
+                "source_path": m.source_path,
+                "target_key": m.target_key,
+            })
         })
-    }).collect();
+        .collect();
     serde_json::to_string(&entries).map_err(|e| SqliteConfigError::Serialization(e.to_string()))
 }
 
 fn mappings_from_json(json: &str) -> Result<Vec<KeyMapping>, SqliteConfigError> {
-    let entries: Vec<serde_json::Value> = serde_json::from_str(json)
-        .map_err(|e| SqliteConfigError::Serialization(e.to_string()))?;
+    let entries: Vec<serde_json::Value> =
+        serde_json::from_str(json).map_err(|e| SqliteConfigError::Serialization(e.to_string()))?;
 
-    entries.iter().map(|v| {
-        Ok(KeyMapping {
-            source_path: v["source_path"].as_str()
-                .ok_or_else(|| SqliteConfigError::Serialization("missing source_path".into()))?.into(),
-            target_key: v["target_key"].as_str()
-                .ok_or_else(|| SqliteConfigError::Serialization("missing target_key".into()))?.into(),
+    entries
+        .iter()
+        .map(|v| {
+            Ok(KeyMapping {
+                source_path: v["source_path"]
+                    .as_str()
+                    .ok_or_else(|| SqliteConfigError::Serialization("missing source_path".into()))?
+                    .into(),
+                target_key: v["target_key"]
+                    .as_str()
+                    .ok_or_else(|| SqliteConfigError::Serialization("missing target_key".into()))?
+                    .into(),
+            })
         })
-    }).collect()
+        .collect()
 }
 
 pub fn widget_from_row(row: &SqliteRow) -> Result<WidgetConfig, SqliteConfigError> {

crates/adapters/config-sqlite/tests/config_store_tests.rs

@@ -1,11 +1,9 @@
-use std::time::Duration;
-use domain::{
-    ConfigRepository, DisplayHint, KeyMapping, WidgetConfig,
-    DataSource, DataSourceConfig, DataSourceType,
-    Layout, LayoutNode, ContainerNode, LayoutChild, Direction, Sizing,
-    LayoutPreset,
-};
 use config_sqlite::SqliteConfigStore;
+use domain::{
+    ConfigRepository, ContainerNode, DataSource, DataSourceConfig, DataSourceType, Direction,
+    DisplayHint, KeyMapping, Layout, LayoutChild, LayoutNode, LayoutPreset, Sizing, WidgetConfig,
+};
+use std::time::Duration;
 
 async fn test_store() -> SqliteConfigStore {
     SqliteConfigStore::new("sqlite::memory:").await.unwrap()
@@ -18,8 +16,14 @@ fn weather_widget() -> WidgetConfig {
         display_hint: DisplayHint::IconValue,
         data_source_id: 10,
         mappings: vec![
-            KeyMapping { source_path: "$.temp".into(), target_key: "temperature".into() },
-            KeyMapping { source_path: "$.icon".into(), target_key: "icon".into() },
+            KeyMapping {
+                source_path: "$.temp".into(),
+                target_key: "temperature".into(),
+            },
+            KeyMapping {
+                source_path: "$.icon".into(),
+                target_key: "icon".into(),
+            },
         ],
         max_data_size: 2048,
     }
@@ -46,8 +50,14 @@ fn test_layout() -> Layout {
             gap: 4,
             padding: 2,
             children: vec![
-                LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-                LayoutChild { sizing: Sizing::Fixed(80), node: LayoutNode::Leaf(2) },
+                LayoutChild {
+                    sizing: Sizing::Flex(1),
+                    node: LayoutNode::Leaf(1),
+                },
+                LayoutChild {
+                    sizing: Sizing::Fixed(80),
+                    node: LayoutNode::Leaf(2),
+                },
             ],
         }),
     }
@@ -78,14 +88,17 @@ async fn get_nonexistent_widget_returns_none() {
 async fn list_widgets_returns_all() {
     let store = test_store().await;
     store.save_widget(&weather_widget()).await.unwrap();
-    store.save_widget(&WidgetConfig {
-        id: 2,
-        name: "portfolio".into(),
-        display_hint: DisplayHint::KeyValue,
-        data_source_id: 20,
-        mappings: vec![],
-        max_data_size: 1024,
-    }).await.unwrap();
+    store
+        .save_widget(&WidgetConfig {
+            id: 2,
+            name: "portfolio".into(),
+            display_hint: DisplayHint::KeyValue,
+            data_source_id: 20,
+            mappings: vec![],
+            max_data_size: 1024,
+        })
+        .await
+        .unwrap();
 
     let widgets = store.list_widgets().await.unwrap();
     assert_eq!(widgets.len(), 2);
@@ -172,12 +185,22 @@ async fn save_and_retrieve_preset() {
 #[tokio::test]
 async fn list_and_delete_presets() {
     let store = test_store().await;
-    store.save_preset(&LayoutPreset {
-        id: 1, name: "a".into(), layout: test_layout(),
-    }).await.unwrap();
-    store.save_preset(&LayoutPreset {
-        id: 2, name: "b".into(), layout: test_layout(),
-    }).await.unwrap();
+    store
+        .save_preset(&LayoutPreset {
+            id: 1,
+            name: "a".into(),
+            layout: test_layout(),
+        })
+        .await
+        .unwrap();
+    store
+        .save_preset(&LayoutPreset {
+            id: 2,
+            name: "b".into(),
+            layout: test_layout(),
+        })
+        .await
+        .unwrap();
 
     assert_eq!(store.list_presets().await.unwrap().len(), 2);
 

crates/adapters/display-terminal/src/lib.rs

@@ -1,5 +1,6 @@
 use client_domain::{BoundingBox, DisplayPort};
 
+#[derive(Default)]
 pub struct TerminalDisplay;
 
 impl TerminalDisplay {
@@ -12,12 +13,24 @@ impl DisplayPort for TerminalDisplay {
     type Error = std::io::Error;
 
     fn clear_region(&mut self, bounds: BoundingBox) -> Result<(), Self::Error> {
-        println!("[CLEAR] ({}, {}) {}x{}", bounds.x, bounds.y, bounds.width, bounds.height);
+        println!(
+            "[CLEAR] ({}, {}) {}x{}",
+            bounds.x, bounds.y, bounds.width, bounds.height
+        );
         Ok(())
     }
 
-    fn draw_text(&mut self, text: &str, x: u16, y: u16, bounds: BoundingBox) -> Result<(), Self::Error> {
-        println!("[TEXT]  ({x}, {y}) in {}x{}: \"{text}\"", bounds.width, bounds.height);
+    fn draw_text(
+        &mut self,
+        text: &str,
+        x: u16,
+        y: u16,
+        bounds: BoundingBox,
+    ) -> Result<(), Self::Error> {
+        println!(
+            "[TEXT]  ({x}, {y}) in {}x{}: \"{text}\"",
+            bounds.width, bounds.height
+        );
         Ok(())
     }
 
@@ -27,7 +40,10 @@ impl DisplayPort for TerminalDisplay {
     }
 
     fn fill_background(&mut self, bounds: BoundingBox) -> Result<(), Self::Error> {
-        println!("[BG]   ({}, {}) {}x{}", bounds.x, bounds.y, bounds.width, bounds.height);
+        println!(
+            "[BG]   ({}, {}) {}x{}",
+            bounds.x, bounds.y, bounds.width, bounds.height
+        );
         Ok(())
     }
 

crates/adapters/http-api/src/lib.rs

@@ -1,9 +1,9 @@
 mod routes;
 
-use std::sync::Arc;
 use axum::Router;
-use tower_http::cors::CorsLayer;
 use domain::{ConfigRepository, EventPublisher};
+use std::sync::Arc;
+use tower_http::cors::CorsLayer;
 
 pub struct AppState<C, E> {
     pub config: Arc<C>,

crates/adapters/http-api/src/routes/data_sources.rs

@@ -1,54 +1,107 @@
+use crate::AppState;
+use api_types::DataSourceDto;
+use application::ConfigService;
 use axum::{
     extract::{Path, State},
     http::StatusCode,
     response::Json,
 };
 use domain::{ConfigRepository, EventPublisher};
-use application::ConfigService;
-use crate::AppState;
-use api_types::DataSourceDto;
 
 type S<C, E> = State<AppState<C, E>>;
 
-pub async fn list_data_sources<C, E>(State(state): S<C, E>) -> Result<Json<Vec<DataSourceDto>>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn list_data_sources<C, E>(
+    State(state): S<C, E>,
+) -> Result<Json<Vec<DataSourceDto>>, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let sources = state.config.list_data_sources().await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let sources = state
+        .config
+        .list_data_sources()
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(Json(sources.iter().map(DataSourceDto::from).collect()))
 }
 
-pub async fn get_data_source<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<Json<DataSourceDto>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn get_data_source<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<Json<DataSourceDto>, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let source = state.config.get_data_source(id).await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let source = state
+        .config
+        .get_data_source(id)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     match source {
         Some(s) => Ok(Json(DataSourceDto::from(&s))),
         None => Err(StatusCode::NOT_FOUND),
     }
 }
 
-pub async fn create_data_source<C, E>(State(state): S<C, E>, Json(body): Json<DataSourceDto>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn create_data_source<C, E>(
+    State(state): S<C, E>,
+    Json(body): Json<DataSourceDto>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let source = body.into_domain().map_err(|e| (StatusCode::BAD_REQUEST, e))?;
+    let source = body
+        .into_domain()
+        .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.create_data_source(source).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.create_data_source(source)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::CREATED)
 }
 
-pub async fn update_data_source<C, E>(State(state): S<C, E>, Path(_id): Path<u16>, Json(body): Json<DataSourceDto>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn update_data_source<C, E>(
+    State(state): S<C, E>,
+    Path(_id): Path<u16>,
+    Json(body): Json<DataSourceDto>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let source = body.into_domain().map_err(|e| (StatusCode::BAD_REQUEST, e))?;
+    let source = body
+        .into_domain()
+        .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.update_data_source(source).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.update_data_source(source)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::OK)
 }
 
-pub async fn delete_data_source<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<StatusCode, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn delete_data_source<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<StatusCode, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.delete_data_source(id).await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    svc.delete_data_source(id)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(StatusCode::NO_CONTENT)
 }

crates/adapters/http-api/src/routes/layout.rs

@@ -1,27 +1,42 @@
-use axum::{
-    extract::State,
-    http::StatusCode,
-    response::Json,
-};
-use domain::{ConfigRepository, EventPublisher};
-use application::ConfigService;
 use crate::AppState;
 use api_types::LayoutDto;
+use application::ConfigService;
+use axum::{extract::State, http::StatusCode, response::Json};
+use domain::{ConfigRepository, EventPublisher};
 
 type S<C, E> = State<AppState<C, E>>;
 
 pub async fn get_layout<C, E>(State(state): S<C, E>) -> Result<Json<Option<LayoutDto>>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let layout = state.config.get_layout().await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let layout = state
+        .config
+        .get_layout()
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(Json(layout.as_ref().map(LayoutDto::from)))
 }
 
-pub async fn update_layout<C, E>(State(state): S<C, E>, Json(body): Json<LayoutDto>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn update_layout<C, E>(
+    State(state): S<C, E>,
+    Json(body): Json<LayoutDto>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let layout = body.into_domain().map_err(|e| (StatusCode::BAD_REQUEST, e))?;
+    let layout = body
+        .into_domain()
+        .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.update_layout(layout).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.update_layout(layout)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::OK)
 }

crates/adapters/http-api/src/routes/mod.rs

@@ -1,12 +1,12 @@
-mod widgets;
 mod data_sources;
 mod layout;
 mod presets;
+mod widgets;
 
-use axum::Router;
-use axum::routing::{get, post, put, delete};
-use domain::{ConfigRepository, EventPublisher};
 use crate::AppState;
+use axum::Router;
+use axum::routing::{get, post};
+use domain::{ConfigRepository, EventPublisher};
 
 pub fn api_routes<C, E>() -> Router<AppState<C, E>>
 where
@@ -16,12 +16,38 @@ where
     E::Error: std::fmt::Debug + Send,
 {
     Router::new()
-        .route("/widgets", get(widgets::list_widgets::<C, E>).post(widgets::create_widget::<C, E>))
-        .route("/widgets/{id}", get(widgets::get_widget::<C, E>).put(widgets::update_widget::<C, E>).delete(widgets::delete_widget::<C, E>))
-        .route("/data-sources", get(data_sources::list_data_sources::<C, E>).post(data_sources::create_data_source::<C, E>))
-        .route("/data-sources/{id}", get(data_sources::get_data_source::<C, E>).put(data_sources::update_data_source::<C, E>).delete(data_sources::delete_data_source::<C, E>))
-        .route("/layout", get(layout::get_layout::<C, E>).put(layout::update_layout::<C, E>))
-        .route("/presets", get(presets::list_presets::<C, E>).post(presets::create_preset::<C, E>))
-        .route("/presets/{id}", get(presets::get_preset::<C, E>).delete(presets::delete_preset::<C, E>))
+        .route(
+            "/widgets",
+            get(widgets::list_widgets::<C, E>).post(widgets::create_widget::<C, E>),
+        )
+        .route(
+            "/widgets/{id}",
+            get(widgets::get_widget::<C, E>)
+                .put(widgets::update_widget::<C, E>)
+                .delete(widgets::delete_widget::<C, E>),
+        )
+        .route(
+            "/data-sources",
+            get(data_sources::list_data_sources::<C, E>)
+                .post(data_sources::create_data_source::<C, E>),
+        )
+        .route(
+            "/data-sources/{id}",
+            get(data_sources::get_data_source::<C, E>)
+                .put(data_sources::update_data_source::<C, E>)
+                .delete(data_sources::delete_data_source::<C, E>),
+        )
+        .route(
+            "/layout",
+            get(layout::get_layout::<C, E>).put(layout::update_layout::<C, E>),
+        )
+        .route(
+            "/presets",
+            get(presets::list_presets::<C, E>).post(presets::create_preset::<C, E>),
+        )
+        .route(
+            "/presets/{id}",
+            get(presets::get_preset::<C, E>).delete(presets::delete_preset::<C, E>),
+        )
         .route("/presets/{id}/load", post(presets::load_preset::<C, E>))
 }

crates/adapters/http-api/src/routes/presets.rs

@@ -1,53 +1,101 @@
+use crate::AppState;
+use api_types::{CreatePresetDto, PresetDto};
+use application::ConfigService;
 use axum::{
     extract::{Path, State},
     http::StatusCode,
     response::Json,
 };
 use domain::{ConfigRepository, EventPublisher};
-use application::ConfigService;
-use crate::AppState;
-use api_types::{PresetDto, CreatePresetDto};
 
 type S<C, E> = State<AppState<C, E>>;
 
 pub async fn list_presets<C, E>(State(state): S<C, E>) -> Result<Json<Vec<PresetDto>>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let presets = state.config.list_presets().await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let presets = state
+        .config
+        .list_presets()
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(Json(presets.iter().map(PresetDto::from).collect()))
 }
 
-pub async fn get_preset<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<Json<PresetDto>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn get_preset<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<Json<PresetDto>, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let preset = state.config.get_preset(id).await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let preset = state
+        .config
+        .get_preset(id)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     match preset {
         Some(p) => Ok(Json(PresetDto::from(&p))),
         None => Err(StatusCode::NOT_FOUND),
     }
 }
 
-pub async fn create_preset<C, E>(State(state): S<C, E>, Json(body): Json<CreatePresetDto>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn create_preset<C, E>(
+    State(state): S<C, E>,
+    Json(body): Json<CreatePresetDto>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let preset = body.into_domain().map_err(|e| (StatusCode::BAD_REQUEST, e))?;
+    let preset = body
+        .into_domain()
+        .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.save_preset(preset).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.save_preset(preset)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::CREATED)
 }
 
-pub async fn delete_preset<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<StatusCode, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn delete_preset<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<StatusCode, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.delete_preset(id).await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    svc.delete_preset(id)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(StatusCode::NO_CONTENT)
 }
 
-pub async fn load_preset<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn load_preset<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.load_preset(id).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.load_preset(id)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::OK)
 }

crates/adapters/http-api/src/routes/widgets.rs

@@ -1,54 +1,105 @@
+use crate::AppState;
+use api_types::{CreateWidgetDto, WidgetDto};
+use application::ConfigService;
 use axum::{
     extract::{Path, State},
     http::StatusCode,
     response::Json,
 };
 use domain::{ConfigRepository, EventPublisher};
-use application::ConfigService;
-use crate::AppState;
-use api_types::{WidgetDto, CreateWidgetDto};
 
 type S<C, E> = State<AppState<C, E>>;
 
 pub async fn list_widgets<C, E>(State(state): S<C, E>) -> Result<Json<Vec<WidgetDto>>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let widgets = state.config.list_widgets().await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let widgets = state
+        .config
+        .list_widgets()
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(Json(widgets.iter().map(WidgetDto::from).collect()))
 }
 
-pub async fn get_widget<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<Json<WidgetDto>, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn get_widget<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<Json<WidgetDto>, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let widget = state.config.get_widget(id).await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let widget = state
+        .config
+        .get_widget(id)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     match widget {
         Some(w) => Ok(Json(WidgetDto::from(&w))),
         None => Err(StatusCode::NOT_FOUND),
     }
 }
 
-pub async fn create_widget<C, E>(State(state): S<C, E>, Json(body): Json<CreateWidgetDto>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn create_widget<C, E>(
+    State(state): S<C, E>,
+    Json(body): Json<CreateWidgetDto>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let widget = body.into_domain().map_err(|e| (StatusCode::BAD_REQUEST, e))?;
+    let widget = body
+        .into_domain()
+        .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.create_widget(widget).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.create_widget(widget)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::CREATED)
 }
 
-pub async fn update_widget<C, E>(State(state): S<C, E>, Path(_id): Path<u16>, Json(body): Json<CreateWidgetDto>) -> Result<StatusCode, (StatusCode, String)>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn update_widget<C, E>(
+    State(state): S<C, E>,
+    Path(_id): Path<u16>,
+    Json(body): Json<CreateWidgetDto>,
+) -> Result<StatusCode, (StatusCode, String)>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
-    let widget = body.into_domain().map_err(|e| (StatusCode::BAD_REQUEST, e))?;
+    let widget = body
+        .into_domain()
+        .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.update_widget(widget).await.map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
+    svc.update_widget(widget)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
     Ok(StatusCode::OK)
 }
 
-pub async fn delete_widget<C, E>(State(state): S<C, E>, Path(id): Path<u16>) -> Result<StatusCode, StatusCode>
-where C: ConfigRepository, C::Error: std::fmt::Debug, E: EventPublisher, E::Error: std::fmt::Debug,
+pub async fn delete_widget<C, E>(
+    State(state): S<C, E>,
+    Path(id): Path<u16>,
+) -> Result<StatusCode, StatusCode>
+where
+    C: ConfigRepository,
+    C::Error: std::fmt::Debug,
+    E: EventPublisher,
+    E::Error: std::fmt::Debug,
 {
     let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
-    svc.delete_widget(id).await.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    svc.delete_widget(id)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     Ok(StatusCode::NO_CONTENT)
 }

crates/adapters/http-api/tests/api_tests.rs

@@ -1,10 +1,10 @@
-use std::sync::Arc;
 use axum::body::Body;
 use axum::http::{Request, StatusCode};
-use tower::ServiceExt;
 use config_memory::MemoryConfigStore;
-use tcp_server::TcpEventBus;
 use http_api::{AppState, router};
+use std::sync::Arc;
+use tcp_server::TcpEventBus;
+use tower::ServiceExt;
 
 fn test_app() -> axum::Router {
     let config = Arc::new(MemoryConfigStore::new());
@@ -38,13 +38,22 @@ async fn create_and_get_widget() {
         "mappings": [{"source_path": "$.temp", "target_key": "temperature"}]
     }"#;
 
-    let resp = app.clone().oneshot(json_request("POST", "/api/widgets", Some(body))).await.unwrap();
+    let resp = app
+        .clone()
+        .oneshot(json_request("POST", "/api/widgets", Some(body)))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::CREATED);
 
-    let resp = app.oneshot(json_request("GET", "/api/widgets/1", None)).await.unwrap();
+    let resp = app
+        .oneshot(json_request("GET", "/api/widgets/1", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::OK);
 
-    let body = axum::body::to_bytes(resp.into_body(), usize::MAX).await.unwrap();
+    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
+        .await
+        .unwrap();
     let json: serde_json::Value = serde_json::from_slice(&body).unwrap();
     assert_eq!(json["name"], "weather");
     assert_eq!(json["display_hint"], "icon_value");
@@ -58,11 +67,22 @@ async fn list_widgets() {
     let w1 = r#"{"id":1,"name":"a","display_hint":"icon_value","data_source_id":1,"mappings":[]}"#;
     let w2 = r#"{"id":2,"name":"b","display_hint":"key_value","data_source_id":2,"mappings":[]}"#;
 
-    app.clone().oneshot(json_request("POST", "/api/widgets", Some(w1))).await.unwrap();
-    app.clone().oneshot(json_request("POST", "/api/widgets", Some(w2))).await.unwrap();
+    app.clone()
+        .oneshot(json_request("POST", "/api/widgets", Some(w1)))
+        .await
+        .unwrap();
+    app.clone()
+        .oneshot(json_request("POST", "/api/widgets", Some(w2)))
+        .await
+        .unwrap();
 
-    let resp = app.oneshot(json_request("GET", "/api/widgets", None)).await.unwrap();
-    let body = axum::body::to_bytes(resp.into_body(), usize::MAX).await.unwrap();
+    let resp = app
+        .oneshot(json_request("GET", "/api/widgets", None))
+        .await
+        .unwrap();
+    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
+        .await
+        .unwrap();
     let json: Vec<serde_json::Value> = serde_json::from_slice(&body).unwrap();
     assert_eq!(json.len(), 2);
 }
@@ -71,13 +91,24 @@ async fn list_widgets() {
 async fn delete_widget() {
     let app = test_app();
 
-    let body = r#"{"id":1,"name":"a","display_hint":"icon_value","data_source_id":1,"mappings":[]}"#;
-    app.clone().oneshot(json_request("POST", "/api/widgets", Some(body))).await.unwrap();
+    let body =
+        r#"{"id":1,"name":"a","display_hint":"icon_value","data_source_id":1,"mappings":[]}"#;
+    app.clone()
+        .oneshot(json_request("POST", "/api/widgets", Some(body)))
+        .await
+        .unwrap();
 
-    let resp = app.clone().oneshot(json_request("DELETE", "/api/widgets/1", None)).await.unwrap();
+    let resp = app
+        .clone()
+        .oneshot(json_request("DELETE", "/api/widgets/1", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::NO_CONTENT);
 
-    let resp = app.oneshot(json_request("GET", "/api/widgets/1", None)).await.unwrap();
+    let resp = app
+        .oneshot(json_request("GET", "/api/widgets/1", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::NOT_FOUND);
 }
 
@@ -95,13 +126,22 @@ async fn create_and_get_data_source() {
         "headers": []
     }"#;
 
-    let resp = app.clone().oneshot(json_request("POST", "/api/data-sources", Some(body))).await.unwrap();
+    let resp = app
+        .clone()
+        .oneshot(json_request("POST", "/api/data-sources", Some(body)))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::CREATED);
 
-    let resp = app.oneshot(json_request("GET", "/api/data-sources/10", None)).await.unwrap();
+    let resp = app
+        .oneshot(json_request("GET", "/api/data-sources/10", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::OK);
 
-    let body = axum::body::to_bytes(resp.into_body(), usize::MAX).await.unwrap();
+    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
+        .await
+        .unwrap();
     let json: serde_json::Value = serde_json::from_slice(&body).unwrap();
     assert_eq!(json["name"], "weather_api");
     assert_eq!(json["poll_interval_secs"], 300);
@@ -124,13 +164,22 @@ async fn update_and_get_layout() {
         }
     }"#;
 
-    let resp = app.clone().oneshot(json_request("PUT", "/api/layout", Some(body))).await.unwrap();
+    let resp = app
+        .clone()
+        .oneshot(json_request("PUT", "/api/layout", Some(body)))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::OK);
 
-    let resp = app.oneshot(json_request("GET", "/api/layout", None)).await.unwrap();
+    let resp = app
+        .oneshot(json_request("GET", "/api/layout", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::OK);
 
-    let body = axum::body::to_bytes(resp.into_body(), usize::MAX).await.unwrap();
+    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
+        .await
+        .unwrap();
     let json: serde_json::Value = serde_json::from_slice(&body).unwrap();
     assert_eq!(json["root"]["type"], "container");
     assert_eq!(json["root"]["direction"], "row");
@@ -141,9 +190,16 @@ async fn update_and_get_layout() {
 async fn get_nonexistent_returns_404() {
     let app = test_app();
 
-    let resp = app.clone().oneshot(json_request("GET", "/api/widgets/99", None)).await.unwrap();
+    let resp = app
+        .clone()
+        .oneshot(json_request("GET", "/api/widgets/99", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::NOT_FOUND);
 
-    let resp = app.oneshot(json_request("GET", "/api/data-sources/99", None)).await.unwrap();
+    let resp = app
+        .oneshot(json_request("GET", "/api/data-sources/99", None))
+        .await
+        .unwrap();
     assert_eq!(resp.status(), StatusCode::NOT_FOUND);
 }

crates/adapters/http-json/src/lib.rs

@@ -14,26 +14,32 @@ pub enum HttpJsonError {
     Parse(String),
 }
 
-impl HttpJsonAdapter {
-    pub fn new() -> Self {
+impl Default for HttpJsonAdapter {
+    fn default() -> Self {
         Self {
             client: reqwest::Client::new(),
         }
     }
 }
 
+impl HttpJsonAdapter {
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
 fn json_to_value(json: serde_json::Value) -> Value {
     match json {
         serde_json::Value::Null => Value::Null,
         serde_json::Value::Bool(b) => Value::Bool(b),
         serde_json::Value::Number(n) => Value::Number(n.as_f64().unwrap_or(0.0)),
         serde_json::Value::String(s) => Value::String(s),
-        serde_json::Value::Array(arr) => {
-            Value::Array(arr.into_iter().map(json_to_value).collect())
-        }
-        serde_json::Value::Object(map) => {
-            Value::Object(map.into_iter().map(|(k, v)| (k, json_to_value(v))).collect())
-        }
+        serde_json::Value::Array(arr) => Value::Array(arr.into_iter().map(json_to_value).collect()),
+        serde_json::Value::Object(map) => Value::Object(
+            map.into_iter()
+                .map(|(k, v)| (k, json_to_value(v)))
+                .collect(),
+        ),
     }
 }
 

crates/adapters/http-json/tests/http_json_tests.rs

@@ -1,19 +1,23 @@
-use std::time::Duration;
-use axum::{Router, routing::get, response::Json};
+use axum::{Router, response::Json, routing::get};
 use domain::{DataSource, DataSourceConfig, DataSourcePort, DataSourceType, Value};
 use http_json::HttpJsonAdapter;
+use std::time::Duration;
 
 async fn start_fake_api() -> String {
     let app = Router::new()
-        .route("/weather", get(|| async {
-            Json(serde_json::json!({
-                "main": {"temp": 5.4, "humidity": 80},
-                "weather": [{"icon": "cloud_rain"}]
-            }))
-        }))
-        .route("/simple", get(|| async {
-            Json(serde_json::json!({"value": "hello"}))
-        }))
+        .route(
+            "/weather",
+            get(|| async {
+                Json(serde_json::json!({
+                    "main": {"temp": 5.4, "humidity": 80},
+                    "weather": [{"icon": "cloud_rain"}]
+                }))
+            }),
+        )
+        .route(
+            "/simple",
+            get(|| async { Json(serde_json::json!({"value": "hello"})) }),
+        )
         .route("/not-json", get(|| async { "plain text" }));
 
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
@@ -46,10 +50,7 @@ async fn polls_url_and_returns_nested_json_as_value() {
 
     let result = adapter.poll(&source).await.unwrap();
 
-    assert_eq!(
-        result.get_path("$.main.temp"),
-        Some(&Value::Number(5.4))
-    );
+    assert_eq!(result.get_path("$.main.temp"), Some(&Value::Number(5.4)));
     assert_eq!(
         result.get_path("$.main.humidity"),
         Some(&Value::Number(80.0))

crates/adapters/media/Cargo.toml

@@ -8,6 +8,8 @@ domain.workspace = true
 reqwest.workspace = true
 serde_json.workspace = true
 thiserror.workspace = true
+md5 = "0.7"
+fastrand = "2"
 
 [dev-dependencies]
 tokio.workspace = true

crates/adapters/media/src/error.rs

@@ -4,6 +4,8 @@ pub enum MediaError {
     Request(#[from] reqwest::Error),
     #[error("no url configured")]
     NoUrl,
+    #[error("missing field in headers: {0}")]
+    MissingField(&'static str),
     #[error("parse: {0}")]
     Parse(String),
 }

crates/adapters/media/src/lib.rs

@@ -2,33 +2,61 @@ mod error;
 
 pub use error::MediaError;
 
-use std::collections::BTreeMap;
 use domain::{DataSource, DataSourcePort, Value};
+use std::collections::BTreeMap;
 
 pub struct MediaAdapter {
     client: reqwest::Client,
 }
 
-impl MediaAdapter {
-    pub fn new() -> Self {
+impl Default for MediaAdapter {
+    fn default() -> Self {
         Self {
             client: reqwest::Client::new(),
         }
     }
 }
 
+impl MediaAdapter {
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
+fn find_header<'a>(headers: &'a [(String, String)], key: &str) -> Option<&'a str> {
+    headers
+        .iter()
+        .find(|(k, _)| k.eq_ignore_ascii_case(key))
+        .map(|(_, v)| v.as_str())
+}
+
+fn subsonic_token(password: &str, salt: &str) -> String {
+    format!("{:x}", md5::compute(format!("{password}{salt}")))
+}
+
 impl DataSourcePort for MediaAdapter {
     type Error = MediaError;
 
     async fn poll(&self, source: &DataSource) -> Result<Value, Self::Error> {
         let base_url = source.config.url.as_ref().ok_or(MediaError::NoUrl)?;
-        let api_key = source.config.api_key.as_deref().unwrap_or("");
+        let username = find_header(&source.config.headers, "username")
+            .ok_or(MediaError::MissingField("username"))?;
+        let password = find_header(&source.config.headers, "password")
+            .ok_or(MediaError::MissingField("password"))?;
+
+        let salt: String = (0..12).map(|_| fastrand::alphanumeric()).collect();
+        let token = subsonic_token(password, &salt);
 
         let url = format!(
-            "{base_url}/rest/getNowPlaying.view?u=kframe&t={api_key}&s=salt&v=1.16.1&c=kframe&f=json"
+            "{base_url}/rest/getNowPlaying.view?u={username}&t={token}&s={salt}&v=1.16.1&c=kframe&f=json"
         );
 
-        let resp = self.client.get(&url).send().await.map_err(MediaError::Request)?;
+        let resp = self
+            .client
+            .get(&url)
+            .send()
+            .await
+            .map_err(MediaError::Request)?;
         let json: serde_json::Value = resp.json().await.map_err(MediaError::Request)?;
 
         let entries = json["subsonic-response"]["nowPlaying"]["entry"]
@@ -45,15 +73,18 @@ impl DataSourcePort for MediaAdapter {
         let entry = &entries[0];
         let mut result = BTreeMap::new();
         result.insert("playing".into(), Value::Bool(true));
-        result.insert("title".into(), Value::String(
-            entry["title"].as_str().unwrap_or("Unknown").into()
-        ));
-        result.insert("artist".into(), Value::String(
-            entry["artist"].as_str().unwrap_or("Unknown").into()
-        ));
-        result.insert("album".into(), Value::String(
-            entry["album"].as_str().unwrap_or("Unknown").into()
-        ));
+        result.insert(
+            "title".into(),
+            Value::String(entry["title"].as_str().unwrap_or("Unknown").into()),
+        );
+        result.insert(
+            "artist".into(),
+            Value::String(entry["artist"].as_str().unwrap_or("Unknown").into()),
+        );
+        result.insert(
+            "album".into(),
+            Value::String(entry["album"].as_str().unwrap_or("Unknown").into()),
+        );
 
         if let Some(duration) = entry["duration"].as_u64() {
             result.insert("duration".into(), Value::Number(duration as f64));

crates/adapters/media/tests/media_tests.rs

@@ -1,6 +1,6 @@
-use std::time::Duration;
 use domain::{DataSource, DataSourceConfig, DataSourcePort, DataSourceType, Value};
 use media_adapter::MediaAdapter;
+use std::time::Duration;
 
 fn subsonic_response(playing: bool) -> serde_json::Value {
     if playing {
@@ -28,10 +28,10 @@ fn subsonic_response(playing: bool) -> serde_json::Value {
 }
 
 async fn start_fake_subsonic(playing: bool) -> String {
-    let app = axum::Router::new()
-        .route("/rest/getNowPlaying.view", axum::routing::get(move || async move {
-            axum::response::Json(subsonic_response(playing))
-        }));
+    let app = axum::Router::new().route(
+        "/rest/getNowPlaying.view",
+        axum::routing::get(move || async move { axum::response::Json(subsonic_response(playing)) }),
+    );
 
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
     let addr = listener.local_addr().unwrap();
@@ -47,8 +47,11 @@ fn make_source(url: String) -> DataSource {
         poll_interval: Duration::from_secs(5),
         config: DataSourceConfig {
             url: Some(url),
-            headers: vec![],
-            api_key: Some("testtoken".into()),
+            headers: vec![
+                ("username".into(), "test".into()),
+                ("password".into(), "testpass".into()),
+            ],
+            api_key: None,
         },
     }
 }
@@ -62,8 +65,14 @@ async fn returns_now_playing_info() {
     let result = adapter.poll(&source).await.unwrap();
 
     assert_eq!(result.get_path("$.playing"), Some(&Value::Bool(true)));
-    assert_eq!(result.get_path("$.title"), Some(&Value::String("Believer".into())));
-    assert_eq!(result.get_path("$.artist"), Some(&Value::String("Imagine Dragons".into())));
+    assert_eq!(
+        result.get_path("$.title"),
+        Some(&Value::String("Believer".into()))
+    );
+    assert_eq!(
+        result.get_path("$.artist"),
+        Some(&Value::String("Imagine Dragons".into()))
+    );
 }
 
 #[tokio::test]

crates/adapters/rss/src/lib.rs

@@ -10,21 +10,32 @@ pub struct RssAdapter {
     client: reqwest::Client,
 }
 
-impl RssAdapter {
-    pub fn new() -> Self {
+impl Default for RssAdapter {
+    fn default() -> Self {
         Self {
             client: reqwest::Client::new(),
         }
     }
 }
 
+impl RssAdapter {
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
 impl DataSourcePort for RssAdapter {
     type Error = RssError;
 
     async fn poll(&self, source: &DataSource) -> Result<Value, Self::Error> {
         let url = source.config.url.as_ref().ok_or(RssError::NoUrl)?;
 
-        let resp = self.client.get(url).send().await.map_err(RssError::Request)?;
+        let resp = self
+            .client
+            .get(url)
+            .send()
+            .await
+            .map_err(RssError::Request)?;
         let xml = resp.text().await.map_err(RssError::Request)?;
 
         parser::parse_rss(&xml)

crates/adapters/rss/src/parser.rs

@@ -29,10 +29,10 @@ pub fn parse_rss(xml: &str) -> Result<Value, RssError> {
             }
             Ok(Event::End(e)) => {
                 let tag = String::from_utf8_lossy(e.name().as_ref()).to_string();
-                if tag == "item" {
-                    if let Some(item) = current_item.take() {
-                        items.push(Value::Object(item));
-                    }
+                if tag == "item"
+                    && let Some(item) = current_item.take()
+                {
+                    items.push(Value::Object(item));
                 }
                 current_tag.clear();
             }
@@ -52,10 +52,10 @@ pub fn parse_rss(xml: &str) -> Result<Value, RssError> {
             }
             Ok(Event::CData(e)) => {
                 let text = String::from_utf8_lossy(&e).to_string();
-                if !current_tag.is_empty() {
-                    if let Some(item) = current_item.as_mut() {
-                        item.insert(current_tag.clone(), Value::String(text));
-                    }
+                if !current_tag.is_empty()
+                    && let Some(item) = current_item.as_mut()
+                {
+                    item.insert(current_tag.clone(), Value::String(text));
                 }
             }
             Ok(Event::Eof) => break,

crates/adapters/rss/tests/parser_tests.rs

@@ -1,5 +1,5 @@
 use domain::Value;
-use rss_adapter::{parse_rss, RssError};
+use rss_adapter::{RssError, parse_rss};
 
 const SAMPLE_RSS: &str = r#"<?xml version="1.0" encoding="UTF-8"?>
     <rss version="2.0">
@@ -23,8 +23,20 @@ const SAMPLE_RSS: &str = r#"<?xml version="1.0" encoding="UTF-8"?>
 fn parses_rss_into_value() {
     let result = parse_rss(SAMPLE_RSS).unwrap();
 
-    assert_eq!(result.get_path("$.title"), Some(&Value::String("Test Feed".into())));
-    assert_eq!(result.get_path("$.items[0].title"), Some(&Value::String("First Article".into())));
-    assert_eq!(result.get_path("$.items[1].title"), Some(&Value::String("Second Article".into())));
-    assert_eq!(result.get_path("$.items[0].description"), Some(&Value::String("Description of first article".into())));
+    assert_eq!(
+        result.get_path("$.title"),
+        Some(&Value::String("Test Feed".into()))
+    );
+    assert_eq!(
+        result.get_path("$.items[0].title"),
+        Some(&Value::String("First Article".into()))
+    );
+    assert_eq!(
+        result.get_path("$.items[1].title"),
+        Some(&Value::String("Second Article".into()))
+    );
+    assert_eq!(
+        result.get_path("$.items[0].description"),
+        Some(&Value::String("Description of first article".into()))
+    );
 }

crates/adapters/tcp-client/src/lib.rs

@@ -1,8 +1,8 @@
+use client_domain::NetworkPort;
+use protocol::MAX_FRAME_SIZE;
 use std::io::{Read, Write};
 use std::net::TcpStream;
 use std::time::Duration;
-use client_domain::NetworkPort;
-use protocol::MAX_FRAME_SIZE;
 
 #[derive(Debug, thiserror::Error)]
 pub enum TcpClientError {
@@ -14,13 +14,14 @@ pub enum TcpClientError {
     FrameTooLarge(usize),
 }
 
+#[derive(Default)]
 pub struct StdTcpClient {
     stream: Option<TcpStream>,
 }
 
 impl StdTcpClient {
     pub fn new() -> Self {
-        Self { stream: None }
+        Self::default()
     }
 }
 
@@ -30,7 +31,9 @@ impl NetworkPort for StdTcpClient {
     fn connect(&mut self, addr: &str) -> Result<(), Self::Error> {
         let stream = TcpStream::connect(addr).map_err(TcpClientError::Io)?;
         stream.set_nonblocking(true).map_err(TcpClientError::Io)?;
-        stream.set_read_timeout(Some(Duration::from_millis(10))).map_err(TcpClientError::Io)?;
+        stream
+            .set_read_timeout(Some(Duration::from_millis(10)))
+            .map_err(TcpClientError::Io)?;
         self.stream = Some(stream);
         Ok(())
     }
@@ -63,7 +66,9 @@ impl NetworkPort for StdTcpClient {
 
         let mut payload = vec![0u8; len];
         stream.set_nonblocking(false).map_err(TcpClientError::Io)?;
-        stream.read_exact(&mut payload).map_err(TcpClientError::Io)?;
+        stream
+            .read_exact(&mut payload)
+            .map_err(TcpClientError::Io)?;
         stream.set_nonblocking(true).map_err(TcpClientError::Io)?;
 
         Ok(Some(payload))

crates/adapters/tcp-server/src/broadcaster.rs

@@ -1,12 +1,7 @@
-use tokio::sync::broadcast;
-use domain::{
-    BroadcastPort, Layout, WidgetId, WidgetState,
-};
-use protocol::{
-    ServerMessage, WidgetDescriptor, WireDisplayHint, WireLayoutNode,
-    encode,
-};
 use crate::error::TcpServerError;
+use domain::{BroadcastPort, Layout, WidgetId, WidgetState};
+use protocol::{ServerMessage, WidgetDescriptor, WireDisplayHint, WireLayoutNode, encode};
+use tokio::sync::broadcast;
 
 pub struct TcpBroadcaster {
     tx: broadcast::Sender<Vec<u8>>,
@@ -37,13 +32,14 @@ impl BroadcastPort for TcpBroadcaster {
         widgets: &[(WidgetId, WidgetState)],
     ) -> Result<(), Self::Error> {
         let wire_layout: WireLayoutNode = (&layout.root).into();
-        let wire_widgets: Vec<WidgetDescriptor> = widgets.iter().map(|(id, state)| {
-            WidgetDescriptor {
+        let wire_widgets: Vec<WidgetDescriptor> = widgets
+            .iter()
+            .map(|(id, state)| WidgetDescriptor {
                 id: *id,
                 display_hint: WireDisplayHint::IconValue,
                 state: state.into(),
-            }
-        }).collect();
+            })
+            .collect();
 
         let msg = ServerMessage::ScreenUpdate {
             layout: wire_layout,
@@ -58,13 +54,14 @@ impl BroadcastPort for TcpBroadcaster {
         &self,
         updates: &[(WidgetId, WidgetState)],
     ) -> Result<(), Self::Error> {
-        let wire_widgets: Vec<WidgetDescriptor> = updates.iter().map(|(id, state)| {
-            WidgetDescriptor {
+        let wire_widgets: Vec<WidgetDescriptor> = updates
+            .iter()
+            .map(|(id, state)| WidgetDescriptor {
                 id: *id,
                 display_hint: WireDisplayHint::IconValue,
                 state: state.into(),
-            }
-        }).collect();
+            })
+            .collect();
 
         let msg = ServerMessage::DataUpdate {
             widgets: wire_widgets,

crates/adapters/tcp-server/src/event_bus.rs

@@ -1,6 +1,6 @@
-use tokio::sync::broadcast;
-use domain::{EventPublisher, DomainEvent};
 use crate::error::TcpServerError;
+use domain::{DomainEvent, EventPublisher};
+use tokio::sync::broadcast;
 
 pub struct TcpEventBus {
     tx: broadcast::Sender<DomainEvent>,

crates/adapters/tcp-server/src/lib.rs

@@ -1,9 +1,9 @@
-mod error;
 mod broadcaster;
+mod error;
 mod event_bus;
 mod server;
 
-pub use error::TcpServerError;
 pub use broadcaster::TcpBroadcaster;
+pub use error::TcpServerError;
 pub use event_bus::TcpEventBus;
 pub use server::run_tcp_server;

crates/adapters/tcp-server/src/server.rs

@@ -1,10 +1,10 @@
-use std::sync::Arc;
-use tokio::net::TcpListener;
-use tokio::sync::broadcast;
-use tokio::io::AsyncWriteExt;
-use tracing::{info, warn};
 use crate::broadcaster::TcpBroadcaster;
 use crate::error::TcpServerError;
+use std::sync::Arc;
+use tokio::io::AsyncWriteExt;
+use tokio::net::TcpListener;
+use tokio::sync::broadcast;
+use tracing::{info, warn};
 
 pub async fn run_tcp_server(
     addr: &str,

crates/api-types/src/data_source.rs

@@ -1,6 +1,6 @@
-use serde::{Serialize, Deserialize};
-use std::time::Duration;
 use domain::*;
+use serde::{Deserialize, Serialize};
+use std::time::Duration;
 
 #[derive(Serialize, Deserialize)]
 pub struct DataSourceDto {
@@ -21,11 +21,12 @@ impl From<&DataSource> for DataSourceDto {
             source_type: match ds.source_type {
                 DataSourceType::Weather => "weather",
                 DataSourceType::Media => "media",
-                DataSourceType::Xtb => "xtb",
+
                 DataSourceType::Rss => "rss",
                 DataSourceType::HttpJson => "http_json",
                 DataSourceType::Webhook => "webhook",
-            }.into(),
+            }
+            .into(),
             poll_interval_secs: ds.poll_interval.as_secs(),
             url: ds.config.url.clone(),
             api_key: ds.config.api_key.clone(),
@@ -39,7 +40,7 @@ impl DataSourceDto {
         let source_type = match self.source_type.as_str() {
             "weather" => DataSourceType::Weather,
             "media" => DataSourceType::Media,
-            "xtb" => DataSourceType::Xtb,
+
             "rss" => DataSourceType::Rss,
             "http_json" => DataSourceType::HttpJson,
             "webhook" => DataSourceType::Webhook,

crates/api-types/src/layout.rs

@@ -1,5 +1,5 @@
-use serde::{Serialize, Deserialize};
 use domain::*;
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize)]
 pub struct SizingDto {
@@ -41,30 +41,41 @@ impl From<&LayoutNode> for LayoutNodeDto {
             LayoutNode::Leaf(id) => Self {
                 node_type: "leaf".into(),
                 widget_id: Some(*id),
-                direction: None, gap: None, padding: None, children: None,
+                direction: None,
+                gap: None,
+                padding: None,
+                children: None,
             },
             LayoutNode::Container(c) => Self {
                 node_type: "container".into(),
                 widget_id: None,
-                direction: Some(match c.direction {
-                    Direction::Row => "row",
-                    Direction::Column => "column",
-                }.into()),
+                direction: Some(
+                    match c.direction {
+                        Direction::Row => "row",
+                        Direction::Column => "column",
+                    }
+                    .into(),
+                ),
                 gap: Some(c.gap),
                 padding: Some(c.padding),
-                children: Some(c.children.iter().map(|ch| LayoutChildDto {
-                    sizing: SizingDto {
-                        sizing_type: match ch.sizing {
-                            Sizing::Fixed(_) => "fixed".into(),
-                            Sizing::Flex(_) => "flex".into(),
-                        },
-                        value: match ch.sizing {
-                            Sizing::Fixed(v) => v,
-                            Sizing::Flex(v) => v as u16,
-                        },
-                    },
-                    node: (&ch.node).into(),
-                }).collect()),
+                children: Some(
+                    c.children
+                        .iter()
+                        .map(|ch| LayoutChildDto {
+                            sizing: SizingDto {
+                                sizing_type: match ch.sizing {
+                                    Sizing::Fixed(_) => "fixed".into(),
+                                    Sizing::Flex(_) => "flex".into(),
+                                },
+                                value: match ch.sizing {
+                                    Sizing::Fixed(v) => v,
+                                    Sizing::Flex(v) => v as u16,
+                                },
+                            },
+                            node: (&ch.node).into(),
+                        })
+                        .collect(),
+                ),
             },
         }
     }
@@ -83,7 +94,9 @@ impl LayoutNodeDto {
                     "column" => Direction::Column,
                     d => return Err(format!("unknown direction: {d}")),
                 };
-                let children = self.children.ok_or("missing children")?
+                let children = self
+                    .children
+                    .ok_or("missing children")?
                     .into_iter()
                     .map(|ch| {
                         let sizing = match ch.sizing.sizing_type.as_str() {
@@ -110,12 +123,16 @@ impl LayoutNodeDto {
 
 impl From<&Layout> for LayoutDto {
     fn from(l: &Layout) -> Self {
-        Self { root: (&l.root).into() }
+        Self {
+            root: (&l.root).into(),
+        }
     }
 }
 
 impl LayoutDto {
     pub fn into_domain(self) -> Result<Layout, String> {
-        Ok(Layout { root: self.root.into_domain()? })
+        Ok(Layout {
+            root: self.root.into_domain()?,
+        })
     }
 }

crates/api-types/src/lib.rs

@@ -1,9 +1,9 @@
-pub mod widget;
 pub mod data_source;
 pub mod layout;
 pub mod preset;
+pub mod widget;
 
-pub use widget::{KeyMappingDto, WidgetDto, CreateWidgetDto};
 pub use data_source::DataSourceDto;
-pub use layout::{LayoutDto, LayoutNodeDto, LayoutChildDto, SizingDto};
-pub use preset::{PresetDto, CreatePresetDto};
+pub use layout::{LayoutChildDto, LayoutDto, LayoutNodeDto, SizingDto};
+pub use preset::{CreatePresetDto, PresetDto};
+pub use widget::{CreateWidgetDto, KeyMappingDto, WidgetDto};

crates/api-types/src/preset.rs

@@ -1,6 +1,6 @@
-use serde::{Serialize, Deserialize};
-use domain::*;
 use crate::layout::LayoutDto;
+use domain::*;
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize)]
 pub struct PresetDto {

crates/api-types/src/widget.rs

@@ -1,5 +1,5 @@
-use serde::{Serialize, Deserialize};
 use domain::*;
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize)]
 pub struct KeyMappingDto {
@@ -28,7 +28,9 @@ pub struct CreateWidgetDto {
     pub max_data_size: u16,
 }
 
-fn default_max_data_size() -> u16 { 2048 }
+fn default_max_data_size() -> u16 {
+    2048
+}
 
 impl From<&WidgetConfig> for WidgetDto {
     fn from(w: &WidgetConfig) -> Self {
@@ -39,12 +41,17 @@ impl From<&WidgetConfig> for WidgetDto {
                 DisplayHint::IconValue => "icon_value",
                 DisplayHint::TextBlock => "text_block",
                 DisplayHint::KeyValue => "key_value",
-            }.into(),
+            }
+            .into(),
             data_source_id: w.data_source_id,
-            mappings: w.mappings.iter().map(|m| KeyMappingDto {
-                source_path: m.source_path.clone(),
-                target_key: m.target_key.clone(),
-            }).collect(),
+            mappings: w
+                .mappings
+                .iter()
+                .map(|m| KeyMappingDto {
+                    source_path: m.source_path.clone(),
+                    target_key: m.target_key.clone(),
+                })
+                .collect(),
             max_data_size: w.max_data_size,
         }
     }
@@ -63,10 +70,14 @@ impl CreateWidgetDto {
             name: self.name,
             display_hint: hint,
             data_source_id: self.data_source_id,
-            mappings: self.mappings.into_iter().map(|m| KeyMapping {
-                source_path: m.source_path,
-                target_key: m.target_key,
-            }).collect(),
+            mappings: self
+                .mappings
+                .into_iter()
+                .map(|m| KeyMapping {
+                    source_path: m.source_path,
+                    target_key: m.target_key,
+                })
+                .collect(),
             max_data_size: self.max_data_size,
         })
     }

crates/application/src/config_service.rs

@@ -1,10 +1,8 @@
-use std::fmt;
 use domain::{
-    ConfigRepository, EventPublisher, DomainEvent,
-    WidgetConfig, WidgetId,
-    DataSource, DataSourceId, DataSourceValidationError,
-    Layout, LayoutPreset, LayoutPresetId,
+    ConfigRepository, DataSource, DataSourceId, DataSourceValidationError, DomainEvent,
+    EventPublisher, Layout, LayoutPreset, LayoutPresetId, WidgetConfig, WidgetId,
 };
+use std::fmt;
 
 pub struct ConfigService<'a, C, E> {
     config: &'a C,
@@ -34,78 +32,173 @@ where
         Self { config, events }
     }
 
-    pub async fn create_widget(&self, widget: WidgetConfig) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.save_widget(&widget).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::WidgetCreated { id: widget.id }).await.map_err(ConfigError::Event)?;
+    pub async fn create_widget(
+        &self,
+        widget: WidgetConfig,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        self.config
+            .save_widget(&widget)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::WidgetCreated { id: widget.id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn update_widget(&self, widget: WidgetConfig) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.save_widget(&widget).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::WidgetUpdated { id: widget.id }).await.map_err(ConfigError::Event)?;
+    pub async fn update_widget(
+        &self,
+        widget: WidgetConfig,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        self.config
+            .save_widget(&widget)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::WidgetUpdated { id: widget.id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
     pub async fn delete_widget(&self, id: WidgetId) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.delete_widget(id).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::WidgetDeleted { id }).await.map_err(ConfigError::Event)?;
+        self.config
+            .delete_widget(id)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::WidgetDeleted { id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn create_data_source(&self, source: DataSource) -> Result<(), ConfigError<C::Error, E::Error>> {
+    pub async fn create_data_source(
+        &self,
+        source: DataSource,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
         let errors = source.validate();
         if !errors.is_empty() {
             return Err(ConfigError::Validation(errors));
         }
-        self.config.save_data_source(&source).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::DataSourceAdded { id: source.id }).await.map_err(ConfigError::Event)?;
+        self.config
+            .save_data_source(&source)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::DataSourceAdded { id: source.id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn update_data_source(&self, source: DataSource) -> Result<(), ConfigError<C::Error, E::Error>> {
+    pub async fn update_data_source(
+        &self,
+        source: DataSource,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
         let errors = source.validate();
         if !errors.is_empty() {
             return Err(ConfigError::Validation(errors));
         }
-        self.config.save_data_source(&source).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::DataSourceUpdated { id: source.id }).await.map_err(ConfigError::Event)?;
+        self.config
+            .save_data_source(&source)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::DataSourceUpdated { id: source.id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn delete_data_source(&self, id: DataSourceId) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.delete_data_source(id).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::DataSourceRemoved { id }).await.map_err(ConfigError::Event)?;
+    pub async fn delete_data_source(
+        &self,
+        id: DataSourceId,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        self.config
+            .delete_data_source(id)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::DataSourceRemoved { id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn update_layout(&self, layout: Layout) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.save_layout(&layout).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::LayoutChanged { layout }).await.map_err(ConfigError::Event)?;
+    pub async fn update_layout(
+        &self,
+        layout: Layout,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        self.config
+            .save_layout(&layout)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::LayoutChanged { layout })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn save_preset(&self, preset: LayoutPreset) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.save_preset(&preset).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::LayoutPresetSaved { id: preset.id }).await.map_err(ConfigError::Event)?;
+    pub async fn save_preset(
+        &self,
+        preset: LayoutPreset,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        self.config
+            .save_preset(&preset)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::LayoutPresetSaved { id: preset.id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 
-    pub async fn load_preset(&self, id: LayoutPresetId) -> Result<(), ConfigError<C::Error, E::Error>> {
-        let preset = self.config.get_preset(id).await
+    pub async fn load_preset(
+        &self,
+        id: LayoutPresetId,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        let preset = self
+            .config
+            .get_preset(id)
+            .await
             .map_err(ConfigError::Repository)?
             .ok_or(ConfigError::NotFound)?;
 
-        self.events.publish(DomainEvent::LayoutPresetLoaded { id }).await.map_err(ConfigError::Event)?;
+        self.events
+            .publish(DomainEvent::LayoutPresetLoaded { id })
+            .await
+            .map_err(ConfigError::Event)?;
 
-        self.config.save_layout(&preset.layout).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::LayoutChanged { layout: preset.layout }).await.map_err(ConfigError::Event)?;
+        self.config
+            .save_layout(&preset.layout)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::LayoutChanged {
+                layout: preset.layout,
+            })
+            .await
+            .map_err(ConfigError::Event)?;
 
         Ok(())
     }
 
-    pub async fn delete_preset(&self, id: LayoutPresetId) -> Result<(), ConfigError<C::Error, E::Error>> {
-        self.config.delete_preset(id).await.map_err(ConfigError::Repository)?;
-        self.events.publish(DomainEvent::LayoutPresetDeleted { id }).await.map_err(ConfigError::Event)?;
+    pub async fn delete_preset(
+        &self,
+        id: LayoutPresetId,
+    ) -> Result<(), ConfigError<C::Error, E::Error>> {
+        self.config
+            .delete_preset(id)
+            .await
+            .map_err(ConfigError::Repository)?;
+        self.events
+            .publish(DomainEvent::LayoutPresetDeleted { id })
+            .await
+            .map_err(ConfigError::Event)?;
         Ok(())
     }
 }

crates/application/src/data_projection.rs

@@ -1,15 +1,18 @@
-use std::collections::HashMap;
 use domain::{DataSourceId, Value, WidgetConfig, WidgetId, WidgetState};
+use std::collections::HashMap;
 
+#[derive(Default)]
 pub struct DataProjection {
     current: HashMap<WidgetId, WidgetState>,
 }
 
 impl DataProjection {
     pub fn new() -> Self {
-        Self {
-            current: HashMap::new(),
-        }
+        Self::default()
+    }
+
+    pub fn get_state(&self, widget_id: WidgetId) -> Option<&WidgetState> {
+        self.current.get(&widget_id)
     }
 
     pub fn apply_poll_result(
@@ -27,9 +30,10 @@ impl DataProjection {
 
             let new_state = config.extract(raw);
 
-            let is_changed = self.current
+            let is_changed = self
+                .current
                 .get(&config.id)
-                .map_or(true, |prev| *prev != new_state);
+                .is_none_or(|prev| *prev != new_state);
 
             if is_changed {
                 self.current.insert(config.id, new_state.clone());

crates/application/tests/config_service_tests.rs

@@ -1,13 +1,12 @@
 mod support;
 
-use std::time::Duration;
-use domain::{
-    ConfigRepository, DisplayHint, DomainEvent, KeyMapping, WidgetConfig,
-    DataSource, DataSourceConfig, DataSourceType,
-    Layout, LayoutNode, ContainerNode, LayoutChild, Direction, Sizing,
-    LayoutPreset,
-};
 use application::ConfigService;
+use domain::{
+    ConfigRepository, ContainerNode, DataSource, DataSourceConfig, DataSourceType, Direction,
+    DisplayHint, DomainEvent, KeyMapping, Layout, LayoutChild, LayoutNode, LayoutPreset, Sizing,
+    WidgetConfig,
+};
+use std::time::Duration;
 use support::{InMemoryConfigRepository, InMemoryEventPublisher};
 
 #[tokio::test]
@@ -21,9 +20,10 @@ async fn create_widget_persists_and_emits_event() {
         "weather".into(),
         DisplayHint::IconValue,
         1,
-        vec![
-            KeyMapping { source_path: "$.temp".into(), target_key: "temperature".into() },
-        ],
+        vec![KeyMapping {
+            source_path: "$.temp".into(),
+            target_key: "temperature".into(),
+        }],
     );
 
     service.create_widget(config).await.unwrap();
@@ -99,8 +99,14 @@ async fn update_layout_persists_and_emits_event() {
             gap: 4,
             padding: 2,
             children: vec![
-                LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-                LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(2) },
+                LayoutChild {
+                    sizing: Sizing::Flex(1),
+                    node: LayoutNode::Leaf(1),
+                },
+                LayoutChild {
+                    sizing: Sizing::Flex(1),
+                    node: LayoutNode::Leaf(2),
+                },
             ],
         }),
     };
@@ -111,7 +117,10 @@ async fn update_layout_persists_and_emits_event() {
     assert_eq!(stored, Some(layout));
 
     assert_eq!(events.emitted().len(), 1);
-    assert!(matches!(events.emitted()[0], DomainEvent::LayoutChanged { .. }));
+    assert!(matches!(
+        events.emitted()[0],
+        DomainEvent::LayoutChanged { .. }
+    ));
 }
 
 #[tokio::test]
@@ -125,9 +134,10 @@ async fn load_preset_replaces_active_layout() {
             direction: Direction::Column,
             gap: 0,
             padding: 0,
-            children: vec![
-                LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(5) },
-            ],
+            children: vec![LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(5),
+            }],
         }),
     };
 
@@ -146,6 +156,9 @@ async fn load_preset_replaces_active_layout() {
 
     let emitted = events.emitted();
     assert_eq!(emitted.len(), 2);
-    assert!(matches!(emitted[0], DomainEvent::LayoutPresetLoaded { id: 1 }));
+    assert!(matches!(
+        emitted[0],
+        DomainEvent::LayoutPresetLoaded { id: 1 }
+    ));
     assert!(matches!(emitted[1], DomainEvent::LayoutChanged { .. }));
 }

crates/application/tests/data_projection_tests.rs

@@ -1,8 +1,6 @@
-use std::collections::BTreeMap;
-use domain::{
-    DisplayHint, KeyMapping, Value, WidgetConfig, WidgetId, WidgetState,
-};
 use application::DataProjection;
+use domain::{DisplayHint, KeyMapping, Value, WidgetConfig, WidgetId, WidgetState};
+use std::collections::BTreeMap;
 
 fn weather_widget() -> WidgetConfig {
     WidgetConfig::new(
@@ -11,8 +9,14 @@ fn weather_widget() -> WidgetConfig {
         DisplayHint::IconValue,
         10,
         vec![
-            KeyMapping { source_path: "$.temp".into(), target_key: "temperature".into() },
-            KeyMapping { source_path: "$.icon".into(), target_key: "icon".into() },
+            KeyMapping {
+                source_path: "$.temp".into(),
+                target_key: "temperature".into(),
+            },
+            KeyMapping {
+                source_path: "$.icon".into(),
+                target_key: "icon".into(),
+            },
         ],
     )
 }
@@ -33,7 +37,10 @@ fn apply_poll_result_detects_new_widget_state() {
 
     assert_eq!(changed.len(), 1);
     assert_eq!(changed[0].0, 1);
-    assert_eq!(changed[0].1.data.get("temperature"), Some(&Value::Number(5.4)));
+    assert_eq!(
+        changed[0].1.data.get("temperature"),
+        Some(&Value::Number(5.4))
+    );
 }
 
 #[test]
@@ -56,7 +63,10 @@ fn apply_poll_result_detects_changed_value() {
     let changed = projection.apply_poll_result(10, &weather_response(6.1), &widgets);
 
     assert_eq!(changed.len(), 1);
-    assert_eq!(changed[0].1.data.get("temperature"), Some(&Value::Number(6.1)));
+    assert_eq!(
+        changed[0].1.data.get("temperature"),
+        Some(&Value::Number(6.1))
+    );
 }
 
 #[test]
@@ -69,9 +79,10 @@ fn apply_poll_result_only_updates_widgets_bound_to_source() {
             "portfolio".into(),
             DisplayHint::KeyValue,
             20,
-            vec![
-                KeyMapping { source_path: "$.value".into(), target_key: "amount".into() },
-            ],
+            vec![KeyMapping {
+                source_path: "$.value".into(),
+                target_key: "amount".into(),
+            }],
         ),
     ];
 

crates/application/tests/support/mod.rs

@@ -1,10 +1,9 @@
-use std::sync::Mutex;
-use std::collections::HashMap;
 use domain::{
-    ConfigRepository, EventPublisher,
-    DataSource, DataSourceId, Layout, LayoutPreset, LayoutPresetId,
-    WidgetConfig, WidgetId, DomainEvent,
+    ConfigRepository, DataSource, DataSourceId, DomainEvent, EventPublisher, Layout, LayoutPreset,
+    LayoutPresetId, WidgetConfig, WidgetId,
 };
+use std::collections::HashMap;
+use std::sync::Mutex;
 
 pub struct InMemoryConfigRepository {
     widgets: Mutex<HashMap<WidgetId, WidgetConfig>>,
@@ -45,7 +44,10 @@ impl ConfigRepository for InMemoryConfigRepository {
     }
 
     async fn save_widget(&self, config: &WidgetConfig) -> Result<(), Self::Error> {
-        self.widgets.lock().unwrap().insert(config.id, config.clone());
+        self.widgets
+            .lock()
+            .unwrap()
+            .insert(config.id, config.clone());
         Ok(())
     }
 
@@ -59,11 +61,20 @@ impl ConfigRepository for InMemoryConfigRepository {
     }
 
     async fn list_data_sources(&self) -> Result<Vec<DataSource>, Self::Error> {
-        Ok(self.data_sources.lock().unwrap().values().cloned().collect())
+        Ok(self
+            .data_sources
+            .lock()
+            .unwrap()
+            .values()
+            .cloned()
+            .collect())
     }
 
     async fn save_data_source(&self, source: &DataSource) -> Result<(), Self::Error> {
-        self.data_sources.lock().unwrap().insert(source.id, source.clone());
+        self.data_sources
+            .lock()
+            .unwrap()
+            .insert(source.id, source.clone());
         Ok(())
     }
 
@@ -90,7 +101,10 @@ impl ConfigRepository for InMemoryConfigRepository {
     }
 
     async fn save_preset(&self, preset: &LayoutPreset) -> Result<(), Self::Error> {
-        self.presets.lock().unwrap().insert(preset.id, preset.clone());
+        self.presets
+            .lock()
+            .unwrap()
+            .insert(preset.id, preset.clone());
         Ok(())
     }
 

crates/bootstrap/Cargo.toml

@@ -10,6 +10,8 @@ config-sqlite.workspace = true
 tcp-server.workspace = true
 http-api.workspace = true
 http-json.workspace = true
+media-adapter.workspace = true
+rss-adapter.workspace = true
 tokio.workspace = true
 anyhow.workspace = true
 tracing.workspace = true

crates/bootstrap/src/config.rs

@@ -12,10 +12,8 @@ impl ServerConfig {
         Self {
             database_url: env::var("KFRAME_DATABASE_URL")
                 .unwrap_or_else(|_| "sqlite:kframe.db?mode=rwc".into()),
-            tcp_addr: env::var("KFRAME_TCP_ADDR")
-                .unwrap_or_else(|_| "0.0.0.0:2699".into()),
-            http_addr: env::var("KFRAME_HTTP_ADDR")
-                .unwrap_or_else(|_| "0.0.0.0:3000".into()),
+            tcp_addr: env::var("KFRAME_TCP_ADDR").unwrap_or_else(|_| "0.0.0.0:2699".into()),
+            http_addr: env::var("KFRAME_HTTP_ADDR").unwrap_or_else(|_| "0.0.0.0:3000".into()),
             poll_interval_secs: env::var("KFRAME_POLL_INTERVAL_SECS")
                 .ok()
                 .and_then(|v| v.parse().ok())

crates/bootstrap/src/event_handler.rs

@@ -0,0 +1,53 @@
+use application::DataProjection;
+use config_sqlite::SqliteConfigStore;
+use domain::{BroadcastPort, ConfigRepository, DomainEvent};
+use std::sync::Arc;
+use tcp_server::{TcpBroadcaster, TcpEventBus};
+use tokio::sync::Mutex;
+use tracing::{error, info, warn};
+
+pub async fn run(
+    event_bus: Arc<TcpEventBus>,
+    config: Arc<SqliteConfigStore>,
+    broadcaster: Arc<TcpBroadcaster>,
+    projection: Arc<Mutex<DataProjection>>,
+) {
+    let mut rx = event_bus.subscribe();
+
+    loop {
+        match rx.recv().await {
+            Ok(DomainEvent::LayoutChanged { layout }) => {
+                let widgets = match config.list_widgets().await {
+                    Ok(w) => w,
+                    Err(e) => {
+                        error!(error = %e, "failed to fetch widgets for screen update");
+                        continue;
+                    }
+                };
+
+                let proj = projection.lock().await;
+                let widget_states: Vec<_> = widgets
+                    .iter()
+                    .filter_map(|w| proj.get_state(w.id).map(|s| (w.id, s.clone())))
+                    .collect();
+
+                if let Err(e) = broadcaster
+                    .push_screen_update(&layout, &widget_states)
+                    .await
+                {
+                    error!(error = %e, "failed to push screen update");
+                }
+
+                info!("layout changed, pushed screen update to clients");
+            }
+            Ok(_) => {}
+            Err(tokio::sync::broadcast::error::RecvError::Lagged(n)) => {
+                warn!(skipped = n, "event handler lagged, missed events");
+            }
+            Err(tokio::sync::broadcast::error::RecvError::Closed) => {
+                error!("event bus closed");
+                break;
+            }
+        }
+    }
+}

crates/bootstrap/src/main.rs

@@ -1,14 +1,15 @@
 mod config;
+mod event_handler;
 mod polling;
 
-use std::sync::Arc;
 use anyhow::Result;
 use application::DataProjection;
 use config_sqlite::SqliteConfigStore;
-use tcp_server::{TcpBroadcaster, TcpEventBus, run_tcp_server};
 use http_api::AppState;
+use std::sync::Arc;
+use tcp_server::{TcpBroadcaster, TcpEventBus, run_tcp_server};
 use tokio::sync::Mutex;
-use tracing::{info, error};
+use tracing::{error, info};
 
 #[tokio::main]
 async fn main() -> Result<()> {
@@ -53,5 +54,19 @@ async fn main() -> Result<()> {
 
     info!("K-Frame server running");
 
-    polling::run(config_store, broadcaster, projection, cfg.poll_interval_secs).await
+    let ev_bus = event_bus.clone();
+    let ev_config = config_store.clone();
+    let ev_bc = broadcaster.clone();
+    let ev_proj = projection.clone();
+    tokio::spawn(async move {
+        event_handler::run(ev_bus, ev_config, ev_bc, ev_proj).await;
+    });
+
+    polling::run(
+        config_store,
+        broadcaster,
+        projection,
+        cfg.poll_interval_secs,
+    )
+    .await
 }

crates/bootstrap/src/polling.rs

@@ -1,16 +1,17 @@
+use anyhow::Result;
+use application::DataProjection;
+use config_sqlite::SqliteConfigStore;
+use domain::{
+    BroadcastPort, ConfigRepository, DataSource, DataSourcePort, DataSourceType, Value, WidgetState,
+};
+use http_json::HttpJsonAdapter;
+use media_adapter::MediaAdapter;
+use rss_adapter::RssAdapter;
 use std::sync::Arc;
 use std::time::Duration;
-use anyhow::Result;
-use domain::{
-    ConfigRepository, BroadcastPort, DataSourcePort, DataSourceType,
-    DataSource, Value, WidgetState,
-};
-use application::DataProjection;
-use http_json::HttpJsonAdapter;
 use tcp_server::TcpBroadcaster;
-use config_sqlite::SqliteConfigStore;
 use tokio::sync::Mutex;
-use tracing::{info, warn, debug};
+use tracing::{debug, info, warn};
 
 pub async fn run(
     config: Arc<SqliteConfigStore>,
@@ -19,6 +20,8 @@ pub async fn run(
     poll_interval_secs: u64,
 ) -> Result<()> {
     let http_adapter = HttpJsonAdapter::new();
+    let media_adapter = MediaAdapter::new();
+    let rss_adapter = RssAdapter::new();
     let interval = Duration::from_secs(poll_interval_secs);
 
     info!(interval_secs = poll_interval_secs, "polling loop started");
@@ -26,11 +29,17 @@ pub async fn run(
     loop {
         tokio::time::sleep(interval).await;
 
-        let sources = config.list_data_sources().await
+        let sources = config
+            .list_data_sources()
+            .await
             .map_err(|e| anyhow::anyhow!("{e}"))?;
-        let widgets = config.list_widgets().await
+        let widgets = config
+            .list_widgets()
+            .await
             .map_err(|e| anyhow::anyhow!("{e}"))?;
-        let layout = config.get_layout().await
+        let layout = config
+            .get_layout()
+            .await
             .map_err(|e| anyhow::anyhow!("{e}"))?;
 
         if sources.is_empty() || widgets.is_empty() {
@@ -41,13 +50,14 @@ pub async fn run(
         let mut all_changed: Vec<(u16, WidgetState)> = Vec::new();
 
         for source in &sources {
-            let result = match poll_source(&http_adapter, source).await {
-                Ok(v) => v,
-                Err(e) => {
-                    warn!(source = %source.name, error = %e, "poll failed");
-                    continue;
-                }
-            };
+            let result =
+                match poll_source(&http_adapter, &media_adapter, &rss_adapter, source).await {
+                    Ok(v) => v,
+                    Err(e) => {
+                        warn!(source = %source.name, error = %e, "poll failed");
+                        continue;
+                    }
+                };
 
             let mut proj = projection.lock().await;
             let changed = proj.apply_poll_result(source.id, &result, &widgets);
@@ -56,7 +66,9 @@ pub async fn run(
 
         if !all_changed.is_empty() {
             if let Some(l) = &layout {
-                broadcaster.push_screen_update(l, &all_changed).await
+                broadcaster
+                    .push_screen_update(l, &all_changed)
+                    .await
                     .map_err(|e| anyhow::anyhow!("{e}"))?;
             }
             info!(count = all_changed.len(), "pushed widget updates");
@@ -66,15 +78,25 @@ pub async fn run(
 
 async fn poll_source(
     http_adapter: &HttpJsonAdapter,
+    media_adapter: &MediaAdapter,
+    rss_adapter: &RssAdapter,
     source: &DataSource,
 ) -> Result<Value> {
     match source.source_type {
-        DataSourceType::HttpJson | DataSourceType::Weather => {
-            http_adapter.poll(source).await
-                .map_err(|e| anyhow::anyhow!("{e}"))
-        }
-        _ => {
-            Err(anyhow::anyhow!("unsupported source type: {:?}", source.source_type))
-        }
+        DataSourceType::HttpJson | DataSourceType::Weather => http_adapter
+            .poll(source)
+            .await
+            .map_err(|e| anyhow::anyhow!("{e}")),
+        DataSourceType::Media => media_adapter
+            .poll(source)
+            .await
+            .map_err(|e| anyhow::anyhow!("{e}")),
+        DataSourceType::Rss => rss_adapter
+            .poll(source)
+            .await
+            .map_err(|e| anyhow::anyhow!("{e}")),
+        DataSourceType::Webhook => Err(anyhow::anyhow!(
+            "webhook sources are push-based, not polled"
+        )),
     }
 }

crates/client-application/src/client_app.rs

@@ -1,9 +1,7 @@
-use std::collections::HashMap;
-use domain::LayoutNode;
 use client_domain::{BoundingBox, LayoutEngine, RenderTree};
-use protocol::{
-    ServerMessage, WidgetDescriptor, WireDisplayHint, WireWidgetState, WireLayoutNode,
-};
+use domain::LayoutNode;
+use protocol::{ServerMessage, WidgetDescriptor, WireDisplayHint, WireLayoutNode, WireWidgetState};
+use std::collections::HashMap;
 
 pub struct ClientApp {
     screen: BoundingBox,
@@ -33,9 +31,7 @@ impl ClientApp {
             ServerMessage::ScreenUpdate { layout, widgets } => {
                 self.handle_screen_update(layout, widgets)
             }
-            ServerMessage::DataUpdate { widgets } => {
-                self.handle_data_update(widgets)
-            }
+            ServerMessage::DataUpdate { widgets } => self.handle_data_update(widgets),
             ServerMessage::Heartbeat => Vec::new(),
         }
     }
@@ -50,7 +46,8 @@ impl ClientApp {
 
         self.widget_states.clear();
         for w in &widgets {
-            self.widget_states.insert(w.id, (w.display_hint.clone(), w.state.clone()));
+            self.widget_states
+                .insert(w.id, (w.display_hint.clone(), w.state.clone()));
         }
 
         let repaints = self.build_repaints_for_all(&new_tree);
@@ -58,10 +55,7 @@ impl ClientApp {
         repaints
     }
 
-    fn handle_data_update(
-        &mut self,
-        widgets: Vec<WidgetDescriptor>,
-    ) -> Vec<RepaintCommand> {
+    fn handle_data_update(&mut self, widgets: Vec<WidgetDescriptor>) -> Vec<RepaintCommand> {
         let tree = match &self.render_tree {
             Some(t) => t,
             None => return Vec::new(),
@@ -70,9 +64,10 @@ impl ClientApp {
         let mut repaints = Vec::new();
 
         for w in widgets {
-            let changed = self.widget_states
+            let changed = self
+                .widget_states
                 .get(&w.id)
-                .map_or(true, |(_, prev_state)| *prev_state != w.state);
+                .is_none_or(|(_, prev_state)| *prev_state != w.state);
 
             if changed {
                 if let Some(bounds) = tree.get_widget_bounds(w.id) {

crates/client-application/tests/client_app_tests.rs

@@ -1,9 +1,8 @@
 use client_application::{ClientApp, RepaintCommand};
 use client_domain::BoundingBox;
 use protocol::{
-    ServerMessage, WidgetDescriptor,
-    WireDisplayHint, WireLayoutNode, WireContainerNode, WireLayoutChild,
-    WireDirection, WireSizing, WireWidgetState, WireKeyValue, WireValue,
+    ServerMessage, WidgetDescriptor, WireContainerNode, WireDirection, WireDisplayHint,
+    WireKeyValue, WireLayoutChild, WireLayoutNode, WireSizing, WireValue, WireWidgetState,
 };
 
 fn screen() -> BoundingBox {
@@ -15,9 +14,10 @@ fn weather_descriptor(id: u16, temp: &str) -> WidgetDescriptor {
         id,
         display_hint: WireDisplayHint::IconValue,
         state: WireWidgetState {
-            data: vec![
-                WireKeyValue { key: "temperature".into(), value: WireValue::String(temp.into()) },
-            ],
+            data: vec![WireKeyValue {
+                key: "temperature".into(),
+                value: WireValue::String(temp.into()),
+            }],
             error: None,
         },
     }
@@ -29,8 +29,14 @@ fn two_widget_layout() -> WireLayoutNode {
         gap: 0,
         padding: 0,
         children: vec![
-            WireLayoutChild { sizing: WireSizing::Flex(1), node: WireLayoutNode::Leaf(1) },
-            WireLayoutChild { sizing: WireSizing::Flex(1), node: WireLayoutNode::Leaf(2) },
+            WireLayoutChild {
+                sizing: WireSizing::Flex(1),
+                node: WireLayoutNode::Leaf(1),
+            },
+            WireLayoutChild {
+                sizing: WireSizing::Flex(1),
+                node: WireLayoutNode::Leaf(2),
+            },
         ],
     })
 }
@@ -116,8 +122,14 @@ fn second_screen_update_repaints_all_widgets_with_new_layout() {
         gap: 0,
         padding: 0,
         children: vec![
-            WireLayoutChild { sizing: WireSizing::Flex(1), node: WireLayoutNode::Leaf(1) },
-            WireLayoutChild { sizing: WireSizing::Flex(1), node: WireLayoutNode::Leaf(2) },
+            WireLayoutChild {
+                sizing: WireSizing::Flex(1),
+                node: WireLayoutNode::Leaf(1),
+            },
+            WireLayoutChild {
+                sizing: WireSizing::Flex(1),
+                node: WireLayoutNode::Leaf(2),
+            },
         ],
     });
 

crates/client-desktop/src/main.rs

@@ -1,11 +1,11 @@
-use std::thread;
-use std::sync::mpsc;
-use std::time::Duration;
-use client_domain::{BoundingBox, DisplayPort, NetworkPort};
 use client_application::ClientApp;
-use tcp_client::StdTcpClient;
+use client_domain::{BoundingBox, DisplayPort, NetworkPort};
 use display_terminal::TerminalDisplay;
 use protocol::decode_server_message;
+use std::sync::mpsc;
+use std::thread;
+use std::time::Duration;
+use tcp_client::StdTcpClient;
 
 fn main() {
     let screen = BoundingBox::screen(240, 320);
@@ -35,12 +35,12 @@ fn main() {
             }
 
             match net.receive() {
-                Ok(Some(payload)) => {
-                    match decode_server_message(&payload) {
-                        Ok(msg) => { let _ = tx.send(msg); }
-                        Err(e) => println!("[NET] Decode error: {e}"),
+                Ok(Some(payload)) => match decode_server_message(&payload) {
+                    Ok(msg) => {
+                        let _ = tx.send(msg);
                     }
-                }
+                    Err(e) => println!("[NET] Decode error: {e}"),
+                },
                 Ok(None) => {
                     thread::sleep(Duration::from_millis(50));
                 }
@@ -67,11 +67,14 @@ fn main() {
 
                         for kv in &cmd.state.data {
                             if let protocol::WireValue::String(s) = &kv.value {
-                                display.draw_text(
-                                    &format!("{}: {s}", kv.key),
-                                    cmd.bounds.x, cmd.bounds.y,
-                                    cmd.bounds,
-                                ).unwrap();
+                                display
+                                    .draw_text(
+                                        &format!("{}: {s}", kv.key),
+                                        cmd.bounds.x,
+                                        cmd.bounds.y,
+                                        cmd.bounds,
+                                    )
+                                    .unwrap();
                             }
                         }
                     }

crates/client-domain/src/bounding_box.rs

@@ -8,10 +8,20 @@ pub struct BoundingBox {
 
 impl BoundingBox {
     pub fn new(x: u16, y: u16, width: u16, height: u16) -> Self {
-        Self { x, y, width, height }
+        Self {
+            x,
+            y,
+            width,
+            height,
+        }
     }
 
     pub fn screen(width: u16, height: u16) -> Self {
-        Self { x: 0, y: 0, width, height }
+        Self {
+            x: 0,
+            y: 0,
+            width,
+            height,
+        }
     }
 }

crates/client-domain/src/layout_engine.rs

@@ -1,6 +1,6 @@
-use std::collections::HashMap;
-use domain::{LayoutNode, ContainerNode, Direction, Sizing};
 use crate::{BoundingBox, RenderTree};
+use domain::{ContainerNode, Direction, LayoutNode, Sizing};
+use std::collections::HashMap;
 
 pub struct LayoutEngine;
 
@@ -11,11 +11,7 @@ impl LayoutEngine {
         RenderTree { widget_bounds }
     }
 
-    fn compute_node(
-        node: &LayoutNode,
-        bounds: BoundingBox,
-        out: &mut HashMap<u16, BoundingBox>,
-    ) {
+    fn compute_node(node: &LayoutNode, bounds: BoundingBox, out: &mut HashMap<u16, BoundingBox>) {
         match node {
             LayoutNode::Leaf(id) => {
                 out.insert(*id, bounds);
@@ -48,16 +44,22 @@ impl LayoutEngine {
         let total_gap = container.gap as u16 * (children.len() as u16).saturating_sub(1);
         let available = total_axis.saturating_sub(total_gap);
 
-        let fixed_total: u16 = children.iter().map(|c| match c.sizing {
-            Sizing::Fixed(px) => px,
-            Sizing::Flex(_) => 0,
-        }).sum();
+        let fixed_total: u16 = children
+            .iter()
+            .map(|c| match c.sizing {
+                Sizing::Fixed(px) => px,
+                Sizing::Flex(_) => 0,
+            })
+            .sum();
 
         let flex_space = available.saturating_sub(fixed_total);
-        let flex_total: u16 = children.iter().map(|c| match c.sizing {
-            Sizing::Flex(w) => w as u16,
-            Sizing::Fixed(_) => 0,
-        }).sum();
+        let flex_total: u16 = children
+            .iter()
+            .map(|c| match c.sizing {
+                Sizing::Flex(w) => w as u16,
+                Sizing::Fixed(_) => 0,
+            })
+            .sum();
 
         let mut offset = 0u16;
 
@@ -74,19 +76,9 @@ impl LayoutEngine {
             };
 
             let child_bounds = if is_row {
-                BoundingBox::new(
-                    inner.x + offset,
-                    inner.y,
-                    child_size,
-                    inner.height,
-                )
+                BoundingBox::new(inner.x + offset, inner.y, child_size, inner.height)
             } else {
-                BoundingBox::new(
-                    inner.x,
-                    inner.y + offset,
-                    inner.width,
-                    child_size,
-                )
+                BoundingBox::new(inner.x, inner.y + offset, inner.width, child_size)
             };
 
             Self::compute_node(&child.node, child_bounds, out);

crates/client-domain/src/lib.rs

@@ -1,9 +1,9 @@
 mod bounding_box;
 mod layout_engine;
-mod render_tree;
 pub mod ports;
+mod render_tree;
 
 pub use bounding_box::BoundingBox;
 pub use layout_engine::LayoutEngine;
+pub use ports::{ClientConfig, DisplayPort, NetworkPort, StoragePort};
 pub use render_tree::RenderTree;
-pub use ports::{DisplayPort, NetworkPort, StoragePort, ClientConfig};

crates/client-domain/src/ports/display.rs

@@ -4,7 +4,13 @@ pub trait DisplayPort {
     type Error;
 
     fn clear_region(&mut self, bounds: BoundingBox) -> Result<(), Self::Error>;
-    fn draw_text(&mut self, text: &str, x: u16, y: u16, bounds: BoundingBox) -> Result<(), Self::Error>;
+    fn draw_text(
+        &mut self,
+        text: &str,
+        x: u16,
+        y: u16,
+        bounds: BoundingBox,
+    ) -> Result<(), Self::Error>;
     fn draw_icon(&mut self, icon: &str, x: u16, y: u16) -> Result<(), Self::Error>;
     fn fill_background(&mut self, bounds: BoundingBox) -> Result<(), Self::Error>;
     fn flush(&mut self) -> Result<(), Self::Error>;

crates/client-domain/src/ports/mod.rs

@@ -4,4 +4,4 @@ mod storage;
 
 pub use display::DisplayPort;
 pub use network::NetworkPort;
-pub use storage::{StoragePort, ClientConfig};
+pub use storage::{ClientConfig, StoragePort};

crates/client-domain/src/render_tree.rs

@@ -1,6 +1,6 @@
-use std::collections::HashMap;
-use domain::WidgetId;
 use crate::BoundingBox;
+use domain::WidgetId;
+use std::collections::HashMap;
 
 pub struct RenderTree {
     pub widget_bounds: HashMap<WidgetId, BoundingBox>,

crates/client-domain/tests/layout_engine_tests.rs

@@ -1,7 +1,5 @@
-use domain::{
-    LayoutNode, ContainerNode, LayoutChild, Direction, Sizing,
-};
 use client_domain::{BoundingBox, LayoutEngine, RenderTree};
+use domain::{ContainerNode, Direction, LayoutChild, LayoutNode, Sizing};
 
 fn screen() -> BoundingBox {
     BoundingBox::screen(240, 320)
@@ -73,9 +71,18 @@ fn row_splits_width_among_equal_flex_children() {
     let layout = row(vec![leaf(1), leaf(2), leaf(3)]);
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(0, 0, 80, 320)));
-    assert_eq!(tree.get_widget_bounds(2), Some(&BoundingBox::new(80, 0, 80, 320)));
-    assert_eq!(tree.get_widget_bounds(3), Some(&BoundingBox::new(160, 0, 80, 320)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(0, 0, 80, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(2),
+        Some(&BoundingBox::new(80, 0, 80, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(3),
+        Some(&BoundingBox::new(160, 0, 80, 320))
+    );
 }
 
 #[test]
@@ -83,8 +90,14 @@ fn column_splits_height_among_equal_flex_children() {
     let layout = column(vec![leaf(1), leaf(2)]);
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(0, 0, 240, 160)));
-    assert_eq!(tree.get_widget_bounds(2), Some(&BoundingBox::new(0, 160, 240, 160)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(0, 0, 240, 160))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(2),
+        Some(&BoundingBox::new(0, 160, 240, 160))
+    );
 }
 
 #[test]
@@ -92,8 +105,14 @@ fn fixed_and_flex_children_coexist() {
     let layout = row(vec![leaf_fixed(1, 40), leaf(2)]);
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(0, 0, 40, 320)));
-    assert_eq!(tree.get_widget_bounds(2), Some(&BoundingBox::new(40, 0, 200, 320)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(0, 0, 40, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(2),
+        Some(&BoundingBox::new(40, 0, 200, 320))
+    );
 }
 
 #[test]
@@ -102,8 +121,14 @@ fn gap_is_subtracted_before_distributing_space() {
     let layout = row_with_gap(10, vec![leaf(1), leaf(2)]);
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(0, 0, 115, 320)));
-    assert_eq!(tree.get_widget_bounds(2), Some(&BoundingBox::new(125, 0, 115, 320)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(0, 0, 115, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(2),
+        Some(&BoundingBox::new(125, 0, 115, 320))
+    );
 }
 
 #[test]
@@ -112,7 +137,10 @@ fn padding_insets_available_area() {
     let layout = row_with_padding(10, vec![leaf(1)]);
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(10, 10, 220, 300)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(10, 10, 220, 300))
+    );
 }
 
 #[test]
@@ -125,9 +153,18 @@ fn nested_containers_compute_correctly() {
     let layout = row(vec![leaf(1), inner_col]);
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(0, 0, 120, 320)));
-    assert_eq!(tree.get_widget_bounds(2), Some(&BoundingBox::new(120, 0, 120, 160)));
-    assert_eq!(tree.get_widget_bounds(3), Some(&BoundingBox::new(120, 160, 120, 160)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(0, 0, 120, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(2),
+        Some(&BoundingBox::new(120, 0, 120, 160))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(3),
+        Some(&BoundingBox::new(120, 160, 120, 160))
+    );
 }
 
 #[test]
@@ -138,14 +175,32 @@ fn weighted_flex_distributes_proportionally() {
         gap: 0,
         padding: 0,
         children: vec![
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-            LayoutChild { sizing: Sizing::Flex(2), node: LayoutNode::Leaf(2) },
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(3) },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(1),
+            },
+            LayoutChild {
+                sizing: Sizing::Flex(2),
+                node: LayoutNode::Leaf(2),
+            },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(3),
+            },
         ],
     });
     let tree = LayoutEngine::compute(&layout, screen());
 
-    assert_eq!(tree.get_widget_bounds(1), Some(&BoundingBox::new(0, 0, 60, 320)));
-    assert_eq!(tree.get_widget_bounds(2), Some(&BoundingBox::new(60, 0, 120, 320)));
-    assert_eq!(tree.get_widget_bounds(3), Some(&BoundingBox::new(180, 0, 60, 320)));
+    assert_eq!(
+        tree.get_widget_bounds(1),
+        Some(&BoundingBox::new(0, 0, 60, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(2),
+        Some(&BoundingBox::new(60, 0, 120, 320))
+    );
+    assert_eq!(
+        tree.get_widget_bounds(3),
+        Some(&BoundingBox::new(180, 0, 60, 320))
+    );
 }

crates/client-domain/tests/render_tree_tests.rs

@@ -1,7 +1,5 @@
-use domain::{
-    LayoutNode, ContainerNode, LayoutChild, Direction, Sizing,
-};
 use client_domain::{BoundingBox, LayoutEngine};
+use domain::{ContainerNode, Direction, LayoutChild, LayoutNode, Sizing};
 
 fn screen() -> BoundingBox {
     BoundingBox::screen(240, 320)
@@ -14,8 +12,14 @@ fn diff_detects_moved_widget_after_layout_change() {
         gap: 0,
         padding: 0,
         children: vec![
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(2) },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(1),
+            },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(2),
+            },
         ],
     });
 
@@ -24,8 +28,14 @@ fn diff_detects_moved_widget_after_layout_change() {
         gap: 0,
         padding: 0,
         children: vec![
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(2) },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(1),
+            },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(2),
+            },
         ],
     });
 
@@ -44,8 +54,14 @@ fn diff_returns_empty_for_identical_layouts() {
         gap: 0,
         padding: 0,
         children: vec![
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(2) },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(1),
+            },
+            LayoutChild {
+                sizing: Sizing::Flex(1),
+                node: LayoutNode::Leaf(2),
+            },
         ],
     });
 
@@ -61,18 +77,20 @@ fn diff_detects_added_and_removed_widgets() {
         direction: Direction::Row,
         gap: 0,
         padding: 0,
-        children: vec![
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
-        ],
+        children: vec![LayoutChild {
+            sizing: Sizing::Flex(1),
+            node: LayoutNode::Leaf(1),
+        }],
     });
 
     let layout_b = LayoutNode::Container(ContainerNode {
         direction: Direction::Row,
         gap: 0,
         padding: 0,
-        children: vec![
-            LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(2) },
-        ],
+        children: vec![LayoutChild {
+            sizing: Sizing::Flex(1),
+            node: LayoutNode::Leaf(2),
+        }],
     });
 
     let tree_a = LayoutEngine::compute(&layout_a, screen());

crates/domain/src/entities/data_source.rs

@@ -6,7 +6,6 @@ pub type DataSourceId = u16;
 pub enum DataSourceType {
     Weather,
     Media,
-    Xtb,
     Rss,
     HttpJson,
     Webhook,

crates/domain/src/entities/mod.rs

@@ -1,7 +1,9 @@
-mod widget_config;
 mod data_source;
 mod layout_preset;
+mod widget_config;
 
-pub use widget_config::{WidgetConfig, WidgetId};
-pub use data_source::{DataSource, DataSourceId, DataSourceType, DataSourceConfig, DataSourceValidationError};
+pub use data_source::{
+    DataSource, DataSourceConfig, DataSourceId, DataSourceType, DataSourceValidationError,
+};
 pub use layout_preset::{LayoutPreset, LayoutPresetId};
+pub use widget_config::{WidgetConfig, WidgetId};

crates/domain/src/entities/widget_config.rs

@@ -1,5 +1,5 @@
-use std::collections::BTreeMap;
 use crate::value_objects::{DisplayHint, KeyMapping, Value, WidgetState};
+use std::collections::BTreeMap;
 
 pub type WidgetId = u16;
 pub type DataSourceId = u16;
@@ -58,7 +58,8 @@ impl WidgetConfig {
     fn truncate_value(value: Value, max_bytes: usize) -> Value {
         match value {
             Value::String(s) if s.len() > max_bytes => {
-                let truncated: String = s.char_indices()
+                let truncated: String = s
+                    .char_indices()
                     .take_while(|(i, _)| *i < max_bytes)
                     .map(|(_, c)| c)
                     .collect();

crates/domain/src/lib.rs

@@ -1,19 +1,17 @@
 #![allow(async_fn_in_trait)]
 
 pub mod entities;
-pub mod value_objects;
 pub mod events;
 pub mod ports;
+pub mod value_objects;
 
 pub use entities::{
-    WidgetConfig, WidgetId,
-    DataSource, DataSourceId, DataSourceType, DataSourceConfig, DataSourceValidationError,
-    LayoutPreset, LayoutPresetId,
-};
-pub use value_objects::{
-    Value, KeyMapping,
-    WidgetState, WidgetError, DisplayHint,
-    Layout, LayoutNode, LayoutChild, ContainerNode, Direction, Sizing, LayoutValidationError,
+    DataSource, DataSourceConfig, DataSourceId, DataSourceType, DataSourceValidationError,
+    LayoutPreset, LayoutPresetId, WidgetConfig, WidgetId,
 };
 pub use events::DomainEvent;
-pub use ports::{ConfigRepository, DataSourcePort, BroadcastPort, EventPublisher};
+pub use ports::{BroadcastPort, ConfigRepository, DataSourcePort, EventPublisher};
+pub use value_objects::{
+    ContainerNode, Direction, DisplayHint, KeyMapping, Layout, LayoutChild, LayoutNode,
+    LayoutValidationError, Sizing, Value, WidgetError, WidgetState,
+};

crates/domain/src/ports/broadcast.rs

@@ -1,6 +1,6 @@
-use std::future::Future;
 use crate::entities::WidgetId;
 use crate::value_objects::{Layout, WidgetState};
+use std::future::Future;
 
 pub trait BroadcastPort {
     type Error;

crates/domain/src/ports/config_repository.rs

@@ -1,27 +1,53 @@
-use std::future::Future;
 use crate::entities::{
     DataSource, DataSourceId, LayoutPreset, LayoutPresetId, WidgetConfig, WidgetId,
 };
 use crate::value_objects::Layout;
+use std::future::Future;
 
 pub trait ConfigRepository {
     type Error;
 
-    fn get_widget(&self, id: WidgetId) -> impl Future<Output = Result<Option<WidgetConfig>, Self::Error>> + Send;
+    fn get_widget(
+        &self,
+        id: WidgetId,
+    ) -> impl Future<Output = Result<Option<WidgetConfig>, Self::Error>> + Send;
     fn list_widgets(&self) -> impl Future<Output = Result<Vec<WidgetConfig>, Self::Error>> + Send;
-    fn save_widget(&self, config: &WidgetConfig) -> impl Future<Output = Result<(), Self::Error>> + Send;
+    fn save_widget(
+        &self,
+        config: &WidgetConfig,
+    ) -> impl Future<Output = Result<(), Self::Error>> + Send;
     fn delete_widget(&self, id: WidgetId) -> impl Future<Output = Result<(), Self::Error>> + Send;
 
-    fn get_data_source(&self, id: DataSourceId) -> impl Future<Output = Result<Option<DataSource>, Self::Error>> + Send;
-    fn list_data_sources(&self) -> impl Future<Output = Result<Vec<DataSource>, Self::Error>> + Send;
-    fn save_data_source(&self, source: &DataSource) -> impl Future<Output = Result<(), Self::Error>> + Send;
-    fn delete_data_source(&self, id: DataSourceId) -> impl Future<Output = Result<(), Self::Error>> + Send;
+    fn get_data_source(
+        &self,
+        id: DataSourceId,
+    ) -> impl Future<Output = Result<Option<DataSource>, Self::Error>> + Send;
+    fn list_data_sources(
+        &self,
+    ) -> impl Future<Output = Result<Vec<DataSource>, Self::Error>> + Send;
+    fn save_data_source(
+        &self,
+        source: &DataSource,
+    ) -> impl Future<Output = Result<(), Self::Error>> + Send;
+    fn delete_data_source(
+        &self,
+        id: DataSourceId,
+    ) -> impl Future<Output = Result<(), Self::Error>> + Send;
 
     fn get_layout(&self) -> impl Future<Output = Result<Option<Layout>, Self::Error>> + Send;
     fn save_layout(&self, layout: &Layout) -> impl Future<Output = Result<(), Self::Error>> + Send;
 
-    fn get_preset(&self, id: LayoutPresetId) -> impl Future<Output = Result<Option<LayoutPreset>, Self::Error>> + Send;
+    fn get_preset(
+        &self,
+        id: LayoutPresetId,
+    ) -> impl Future<Output = Result<Option<LayoutPreset>, Self::Error>> + Send;
     fn list_presets(&self) -> impl Future<Output = Result<Vec<LayoutPreset>, Self::Error>> + Send;
-    fn save_preset(&self, preset: &LayoutPreset) -> impl Future<Output = Result<(), Self::Error>> + Send;
-    fn delete_preset(&self, id: LayoutPresetId) -> impl Future<Output = Result<(), Self::Error>> + Send;
+    fn save_preset(
+        &self,
+        preset: &LayoutPreset,
+    ) -> impl Future<Output = Result<(), Self::Error>> + Send;
+    fn delete_preset(
+        &self,
+        id: LayoutPresetId,
+    ) -> impl Future<Output = Result<(), Self::Error>> + Send;
 }

crates/domain/src/ports/data_source_port.rs

@@ -1,6 +1,6 @@
-use std::future::Future;
 use crate::entities::DataSource;
 use crate::value_objects::Value;
+use std::future::Future;
 
 pub trait DataSourcePort {
     type Error;

crates/domain/src/ports/event.rs

@@ -1,5 +1,5 @@
-use std::future::Future;
 use crate::events::DomainEvent;
+use std::future::Future;
 
 pub trait EventPublisher {
     type Error;

crates/domain/src/ports/mod.rs

@@ -1,9 +1,9 @@
+mod broadcast;
 mod config_repository;
 mod data_source_port;
-mod broadcast;
 mod event;
 
+pub use broadcast::BroadcastPort;
 pub use config_repository::ConfigRepository;
 pub use data_source_port::DataSourcePort;
-pub use broadcast::BroadcastPort;
 pub use event::EventPublisher;

crates/domain/src/value_objects/layout.rs

@@ -1,5 +1,5 @@
-use std::collections::BTreeSet;
 use crate::entities::WidgetId;
+use std::collections::BTreeSet;
 
 #[derive(Debug, Clone, PartialEq)]
 pub enum Sizing {
@@ -81,7 +81,9 @@ impl Layout {
 
     fn collect_ids(node: &LayoutNode, ids: &mut BTreeSet<WidgetId>) {
         match node {
-            LayoutNode::Leaf(id) => { ids.insert(*id); }
+            LayoutNode::Leaf(id) => {
+                ids.insert(*id);
+            }
             LayoutNode::Container(c) => {
                 for child in &c.children {
                     Self::collect_ids(&child.node, ids);

crates/domain/src/value_objects/mod.rs

@@ -1,11 +1,11 @@
-mod value;
 mod key_mapping;
-mod widget_state;
 mod layout;
+mod value;
+mod widget_state;
 
-pub use value::Value;
 pub use key_mapping::KeyMapping;
-pub use widget_state::{WidgetState, WidgetError, DisplayHint};
 pub use layout::{
-    Layout, LayoutNode, LayoutChild, ContainerNode, Direction, Sizing, LayoutValidationError,
+    ContainerNode, Direction, Layout, LayoutChild, LayoutNode, LayoutValidationError, Sizing,
 };
+pub use value::Value;
+pub use widget_state::{DisplayHint, WidgetError, WidgetState};

crates/domain/src/value_objects/value.rs

@@ -17,10 +17,7 @@ impl Value {
             Value::Number(_) => 8,
             Value::String(s) => s.len(),
             Value::Array(arr) => arr.iter().map(|v| v.estimated_size()).sum(),
-            Value::Object(map) => map
-                .iter()
-                .map(|(k, v)| k.len() + v.estimated_size())
-                .sum(),
+            Value::Object(map) => map.iter().map(|(k, v)| k.len() + v.estimated_size()).sum(),
         }
     }
 

crates/domain/src/value_objects/widget_state.rs

@@ -1,5 +1,5 @@
-use std::collections::BTreeMap;
 use super::Value;
+use std::collections::BTreeMap;
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct WidgetState {

crates/domain/tests/data_source_tests.rs

@@ -1,5 +1,5 @@
-use std::time::Duration;
 use domain::{DataSource, DataSourceConfig, DataSourceType, DataSourceValidationError};
+use std::time::Duration;
 
 fn make_source(source_type: DataSourceType, url: Option<&str>, poll: Duration) -> DataSource {
     DataSource {
@@ -38,14 +38,22 @@ fn webhook_with_zero_interval_is_valid() {
 
 #[test]
 fn poll_based_source_requires_nonzero_interval() {
-    let source = make_source(DataSourceType::Weather, Some("https://api.weather.com"), Duration::ZERO);
+    let source = make_source(
+        DataSourceType::Weather,
+        Some("https://api.weather.com"),
+        Duration::ZERO,
+    );
     let errors = source.validate();
     assert!(errors.contains(&DataSourceValidationError::PollIntervalRequired));
 }
 
 #[test]
 fn valid_poll_source_has_no_errors() {
-    let source = make_source(DataSourceType::Rss, Some("https://feed.example.com"), Duration::from_secs(300));
+    let source = make_source(
+        DataSourceType::Rss,
+        Some("https://feed.example.com"),
+        Duration::from_secs(300),
+    );
     let errors = source.validate();
     assert!(errors.is_empty());
 }

crates/domain/tests/key_mapping_tests.rs

@@ -1,5 +1,5 @@
-use std::collections::BTreeMap;
 use domain::{KeyMapping, Value};
+use std::collections::BTreeMap;
 
 #[test]
 fn extracts_value_at_path_and_renames_key() {
@@ -8,11 +8,10 @@ fn extracts_value_at_path_and_renames_key() {
         target_key: "temperature".into(),
     };
 
-    let raw = Value::Object(BTreeMap::from([
-        ("main".into(), Value::Object(BTreeMap::from([
-            ("temp".into(), Value::Number(5.4)),
-        ]))),
-    ]));
+    let raw = Value::Object(BTreeMap::from([(
+        "main".into(),
+        Value::Object(BTreeMap::from([("temp".into(), Value::Number(5.4))])),
+    )]));
 
     let result = mapping.extract(&raw);
     assert_eq!(result, Some(("temperature".into(), Value::Number(5.4))));
@@ -25,9 +24,7 @@ fn returns_none_when_path_does_not_match() {
         target_key: "value".into(),
     };
 
-    let raw = Value::Object(BTreeMap::from([
-        ("other".into(), Value::Number(1.0)),
-    ]));
+    let raw = Value::Object(BTreeMap::from([("other".into(), Value::Number(1.0))]));
 
     assert_eq!(mapping.extract(&raw), None);
 }

crates/domain/tests/layout_tests.rs

@@ -1,8 +1,8 @@
-use std::collections::BTreeSet;
 use domain::{
     ContainerNode, Direction, Layout, LayoutChild, LayoutNode, LayoutValidationError, Sizing,
     WidgetId,
 };
+use std::collections::BTreeSet;
 
 fn leaf(id: WidgetId) -> LayoutChild {
     LayoutChild {
@@ -22,14 +22,18 @@ fn row(children: Vec<LayoutChild>) -> LayoutNode {
 
 #[test]
 fn validate_returns_empty_when_all_widgets_exist() {
-    let layout = Layout { root: row(vec![leaf(1), leaf(2)]) };
+    let layout = Layout {
+        root: row(vec![leaf(1), leaf(2)]),
+    };
     let known = BTreeSet::from([1, 2]);
     assert!(layout.validate(&known).is_empty());
 }
 
 #[test]
 fn validate_reports_unknown_widget_ids() {
-    let layout = Layout { root: row(vec![leaf(1), leaf(99)]) };
+    let layout = Layout {
+        root: row(vec![leaf(1), leaf(99)]),
+    };
     let known = BTreeSet::from([1]);
     let errors = layout.validate(&known);
     assert_eq!(errors, vec![LayoutValidationError::UnknownWidget(99)]);
@@ -49,7 +53,9 @@ fn validate_checks_nested_containers() {
         sizing: Sizing::Flex(1),
         node: row(vec![leaf(1), leaf(42)]),
     };
-    let layout = Layout { root: row(vec![inner, leaf(2)]) };
+    let layout = Layout {
+        root: row(vec![inner, leaf(2)]),
+    };
     let known = BTreeSet::from([1, 2]);
     let errors = layout.validate(&known);
     assert_eq!(errors, vec![LayoutValidationError::UnknownWidget(42)]);
@@ -61,6 +67,8 @@ fn widget_ids_collects_all_leaf_ids() {
         sizing: Sizing::Flex(1),
         node: row(vec![leaf(3)]),
     };
-    let layout = Layout { root: row(vec![leaf(1), inner, leaf(2)]) };
+    let layout = Layout {
+        root: row(vec![leaf(1), inner, leaf(2)]),
+    };
     assert_eq!(layout.widget_ids(), BTreeSet::from([1, 2, 3]));
 }

crates/domain/tests/value_tests.rs

@@ -1,5 +1,5 @@
-use std::collections::BTreeMap;
 use domain::Value;
+use std::collections::BTreeMap;
 
 #[test]
 fn estimated_size_of_string_is_its_byte_length() {
@@ -29,37 +29,31 @@ fn estimated_size_of_nested_structure_sums_recursively() {
 
 #[test]
 fn estimated_size_of_array_sums_elements() {
-    let v = Value::Array(vec![
-        Value::String("abc".into()),
-        Value::Number(1.0),
-    ]);
+    let v = Value::Array(vec![Value::String("abc".into()), Value::Number(1.0)]);
     assert_eq!(v.estimated_size(), 11);
 }
 
 #[test]
 fn get_path_returns_none_for_missing_key() {
-    let data = Value::Object(BTreeMap::from([
-        ("main".into(), Value::Number(1.0)),
-    ]));
+    let data = Value::Object(BTreeMap::from([("main".into(), Value::Number(1.0))]));
     assert_eq!(data.get_path("$.missing"), None);
 }
 
 #[test]
 fn get_path_returns_none_when_traversing_non_object() {
-    let data = Value::Object(BTreeMap::from([
-        ("temp".into(), Value::Number(5.4)),
-    ]));
+    let data = Value::Object(BTreeMap::from([("temp".into(), Value::Number(5.4))]));
     assert_eq!(data.get_path("$.temp.nested"), None);
 }
 
 #[test]
 fn get_path_accesses_array_by_index() {
-    let data = Value::Object(BTreeMap::from([
-        ("items".into(), Value::Array(vec![
+    let data = Value::Object(BTreeMap::from([(
+        "items".into(),
+        Value::Array(vec![
             Value::String("first".into()),
             Value::String("second".into()),
-        ])),
-    ]));
+        ]),
+    )]));
     assert_eq!(
         data.get_path("$.items[1]"),
         Some(&Value::String("second".into()))
@@ -68,10 +62,9 @@ fn get_path_accesses_array_by_index() {
 
 #[test]
 fn get_path_traverses_nested_object() {
-    let data = Value::Object(BTreeMap::from([
-        ("main".into(), Value::Object(BTreeMap::from([
-            ("temp".into(), Value::Number(5.4)),
-        ]))),
-    ]));
+    let data = Value::Object(BTreeMap::from([(
+        "main".into(),
+        Value::Object(BTreeMap::from([("temp".into(), Value::Number(5.4))])),
+    )]));
     assert_eq!(data.get_path("$.main.temp"), Some(&Value::Number(5.4)));
 }

crates/domain/tests/widget_tests.rs

@@ -1,5 +1,5 @@
-use std::collections::BTreeMap;
 use domain::{DisplayHint, KeyMapping, Value, WidgetConfig};
+use std::collections::BTreeMap;
 
 #[test]
 fn extract_applies_all_mappings_to_produce_widget_state() {
@@ -9,27 +9,39 @@ fn extract_applies_all_mappings_to_produce_widget_state() {
         display_hint: DisplayHint::IconValue,
         data_source_id: 1,
         mappings: vec![
-            KeyMapping { source_path: "$.main.temp".into(), target_key: "temperature".into() },
-            KeyMapping { source_path: "$.weather[0].icon".into(), target_key: "icon".into() },
+            KeyMapping {
+                source_path: "$.main.temp".into(),
+                target_key: "temperature".into(),
+            },
+            KeyMapping {
+                source_path: "$.weather[0].icon".into(),
+                target_key: "icon".into(),
+            },
         ],
         max_data_size: 2048,
     };
 
     let raw = Value::Object(BTreeMap::from([
-        ("main".into(), Value::Object(BTreeMap::from([
-            ("temp".into(), Value::Number(5.4)),
-        ]))),
-        ("weather".into(), Value::Array(vec![
-            Value::Object(BTreeMap::from([
-                ("icon".into(), Value::String("cloud_rain".into())),
-            ])),
-        ])),
+        (
+            "main".into(),
+            Value::Object(BTreeMap::from([("temp".into(), Value::Number(5.4))])),
+        ),
+        (
+            "weather".into(),
+            Value::Array(vec![Value::Object(BTreeMap::from([(
+                "icon".into(),
+                Value::String("cloud_rain".into()),
+            )]))]),
+        ),
     ]));
 
     let state = config.extract(&raw);
 
     assert_eq!(state.data.get("temperature"), Some(&Value::Number(5.4)));
-    assert_eq!(state.data.get("icon"), Some(&Value::String("cloud_rain".into())));
+    assert_eq!(
+        state.data.get("icon"),
+        Some(&Value::String("cloud_rain".into()))
+    );
     assert_eq!(state.error, None);
 }
 
@@ -41,15 +53,14 @@ fn extract_truncates_string_values_exceeding_max_data_size() {
         name: "news".into(),
         display_hint: DisplayHint::TextBlock,
         data_source_id: 1,
-        mappings: vec![
-            KeyMapping { source_path: "$.text".into(), target_key: "body".into() },
-        ],
+        mappings: vec![KeyMapping {
+            source_path: "$.text".into(),
+            target_key: "body".into(),
+        }],
         max_data_size: 100,
     };
 
-    let raw = Value::Object(BTreeMap::from([
-        ("text".into(), Value::String(long_text)),
-    ]));
+    let raw = Value::Object(BTreeMap::from([("text".into(), Value::String(long_text))]));
 
     let state = config.extract(&raw);
     match state.data.get("body") {
@@ -66,9 +77,18 @@ fn extract_respects_max_data_size_across_total_state() {
         display_hint: DisplayHint::TextBlock,
         data_source_id: 1,
         mappings: vec![
-            KeyMapping { source_path: "$.a".into(), target_key: "a".into() },
-            KeyMapping { source_path: "$.b".into(), target_key: "b".into() },
-            KeyMapping { source_path: "$.c".into(), target_key: "c".into() },
+            KeyMapping {
+                source_path: "$.a".into(),
+                target_key: "a".into(),
+            },
+            KeyMapping {
+                source_path: "$.b".into(),
+                target_key: "b".into(),
+            },
+            KeyMapping {
+                source_path: "$.c".into(),
+                target_key: "c".into(),
+            },
         ],
         max_data_size: 50,
     };
@@ -92,15 +112,19 @@ fn extract_skips_mappings_that_dont_match() {
         display_hint: DisplayHint::IconValue,
         data_source_id: 1,
         mappings: vec![
-            KeyMapping { source_path: "$.temp".into(), target_key: "temperature".into() },
-            KeyMapping { source_path: "$.missing".into(), target_key: "gone".into() },
+            KeyMapping {
+                source_path: "$.temp".into(),
+                target_key: "temperature".into(),
+            },
+            KeyMapping {
+                source_path: "$.missing".into(),
+                target_key: "gone".into(),
+            },
         ],
         max_data_size: 2048,
     };
 
-    let raw = Value::Object(BTreeMap::from([
-        ("temp".into(), Value::Number(5.4)),
-    ]));
+    let raw = Value::Object(BTreeMap::from([("temp".into(), Value::Number(5.4))]));
 
     let state = config.extract(&raw);
 

crates/protocol/src/frame.rs

@@ -1,5 +1,5 @@
-use serde::{Serialize, Deserialize};
-use super::wire::{WireLayoutNode, WireWidgetState, WireDisplayHint};
+use super::wire::{WireDisplayHint, WireLayoutNode, WireWidgetState};
+use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct WidgetDescriptor {

crates/protocol/src/lib.rs

@@ -1,13 +1,11 @@
-mod wire;
 mod frame;
+mod wire;
 
-pub use wire::{
-    WireValue, WireWidgetState, WireWidgetError, WireDisplayHint,
-    WireLayoutNode, WireContainerNode, WireLayoutChild, WireDirection, WireSizing,
-    WireKeyValue,
-};
 pub use frame::{
-    ServerMessage, ClientMessage, WidgetDescriptor,
-    encode, decode_server_message, encode_client, decode_client_message,
-    MAX_FRAME_SIZE,
+    ClientMessage, MAX_FRAME_SIZE, ServerMessage, WidgetDescriptor, decode_client_message,
+    decode_server_message, encode, encode_client,
+};
+pub use wire::{
+    WireContainerNode, WireDirection, WireDisplayHint, WireKeyValue, WireLayoutChild,
+    WireLayoutNode, WireSizing, WireValue, WireWidgetError, WireWidgetState,
 };

crates/protocol/src/wire.rs

@@ -1,9 +1,9 @@
-use std::collections::BTreeMap;
-use serde::{Serialize, Deserialize};
 use domain::value_objects::{
-    ContainerNode, Direction, DisplayHint, LayoutChild, LayoutNode, Sizing, Value,
-    WidgetError, WidgetState,
+    ContainerNode, Direction, DisplayHint, LayoutChild, LayoutNode, Sizing, Value, WidgetError,
+    WidgetState,
 };
+use serde::{Deserialize, Serialize};
+use std::collections::BTreeMap;
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum WireValue {
@@ -84,10 +84,14 @@ pub struct WireWidgetState {
 impl From<&WidgetState> for WireWidgetState {
     fn from(s: &WidgetState) -> Self {
         WireWidgetState {
-            data: s.data.iter().map(|(k, v)| WireKeyValue {
-                key: k.clone(),
-                value: v.into(),
-            }).collect(),
+            data: s
+                .data
+                .iter()
+                .map(|(k, v)| WireKeyValue {
+                    key: k.clone(),
+                    value: v.into(),
+                })
+                .collect(),
             error: s.error.as_ref().map(Into::into),
         }
     }
@@ -96,7 +100,11 @@ impl From<&WidgetState> for WireWidgetState {
 impl From<WireWidgetState> for WidgetState {
     fn from(w: WireWidgetState) -> Self {
         WidgetState {
-            data: w.data.into_iter().map(|kv| (kv.key, kv.value.into())).collect(),
+            data: w
+                .data
+                .into_iter()
+                .map(|kv| (kv.key, kv.value.into()))
+                .collect(),
             error: w.error.map(Into::into),
         }
     }
@@ -205,10 +213,14 @@ impl From<&LayoutNode> for WireLayoutNode {
                 direction: (&c.direction).into(),
                 gap: c.gap,
                 padding: c.padding,
-                children: c.children.iter().map(|ch| WireLayoutChild {
-                    sizing: (&ch.sizing).into(),
-                    node: (&ch.node).into(),
-                }).collect(),
+                children: c
+                    .children
+                    .iter()
+                    .map(|ch| WireLayoutChild {
+                        sizing: (&ch.sizing).into(),
+                        node: (&ch.node).into(),
+                    })
+                    .collect(),
             }),
         }
     }
@@ -222,10 +234,14 @@ impl From<WireLayoutNode> for LayoutNode {
                 direction: c.direction.into(),
                 gap: c.gap,
                 padding: c.padding,
-                children: c.children.into_iter().map(|ch| LayoutChild {
-                    sizing: ch.sizing.into(),
-                    node: ch.node.into(),
-                }).collect(),
+                children: c
+                    .children
+                    .into_iter()
+                    .map(|ch| LayoutChild {
+                        sizing: ch.sizing.into(),
+                        node: ch.node.into(),
+                    })
+                    .collect(),
             }),
         }
     }

crates/protocol/tests/conversion_tests.rs

@@ -1,24 +1,24 @@
-use std::collections::BTreeMap;
 use domain::{
-    Value, WidgetState, WidgetError, DisplayHint,
-    LayoutNode, ContainerNode, LayoutChild, Direction, Sizing,
+    ContainerNode, Direction, DisplayHint, LayoutChild, LayoutNode, Sizing, Value, WidgetError,
+    WidgetState,
 };
 use protocol::{
-    WireValue, WireWidgetState, WireWidgetError, WireDisplayHint,
-    WireLayoutNode, WireContainerNode, WireLayoutChild, WireDirection, WireSizing,
-    WireKeyValue,
+    WireContainerNode, WireDirection, WireDisplayHint, WireKeyValue, WireLayoutChild,
+    WireLayoutNode, WireSizing, WireValue, WireWidgetError, WireWidgetState,
 };
+use std::collections::BTreeMap;
 
 #[test]
 fn value_converts_to_wire_and_back() {
-    let original = Value::Object(BTreeMap::from([
-        ("items".into(), Value::Array(vec![
+    let original = Value::Object(BTreeMap::from([(
+        "items".into(),
+        Value::Array(vec![
             Value::String("hello".into()),
             Value::Number(42.0),
             Value::Bool(true),
             Value::Null,
-        ])),
-    ]));
+        ]),
+    )]));
 
     let wire: WireValue = (&original).into();
     let roundtripped: Value = wire.into();
@@ -28,9 +28,7 @@ fn value_converts_to_wire_and_back() {
 #[test]
 fn widget_state_with_error_converts_to_wire_and_back() {
     let original = WidgetState {
-        data: BTreeMap::from([
-            ("temp".into(), Value::Number(5.4)),
-        ]),
+        data: BTreeMap::from([("temp".into(), Value::Number(5.4))]),
         error: Some(WidgetError::SourceUnavailable),
     };
 
@@ -56,12 +54,10 @@ fn layout_tree_converts_to_wire_and_back() {
                     direction: Direction::Column,
                     gap: 2,
                     padding: 0,
-                    children: vec![
-                        LayoutChild {
-                            sizing: Sizing::Flex(1),
-                            node: LayoutNode::Leaf(2),
-                        },
-                    ],
+                    children: vec![LayoutChild {
+                        sizing: Sizing::Flex(1),
+                        node: LayoutNode::Leaf(2),
+                    }],
                 }),
             },
         ],
@@ -74,7 +70,11 @@ fn layout_tree_converts_to_wire_and_back() {
 
 #[test]
 fn display_hint_converts_to_wire_and_back() {
-    for hint in [DisplayHint::IconValue, DisplayHint::TextBlock, DisplayHint::KeyValue] {
+    for hint in [
+        DisplayHint::IconValue,
+        DisplayHint::TextBlock,
+        DisplayHint::KeyValue,
+    ] {
         let wire: WireDisplayHint = (&hint).into();
         let roundtripped: DisplayHint = wire.into();
         assert_eq!(hint, roundtripped);

crates/protocol/tests/round_trip_tests.rs

@@ -1,8 +1,7 @@
 use protocol::{
-    ServerMessage, ClientMessage, WidgetDescriptor,
-    WireDisplayHint, WireLayoutNode, WireContainerNode, WireLayoutChild,
-    WireDirection, WireSizing, WireWidgetState, WireKeyValue, WireValue,
-    encode, decode_server_message, encode_client, decode_client_message,
+    ClientMessage, ServerMessage, WidgetDescriptor, WireContainerNode, WireDirection,
+    WireDisplayHint, WireKeyValue, WireLayoutChild, WireLayoutNode, WireSizing, WireValue,
+    WireWidgetState, decode_client_message, decode_server_message, encode, encode_client,
 };
 
 #[test]
@@ -23,19 +22,23 @@ fn screen_update_round_trips() {
                 },
             ],
         }),
-        widgets: vec![
-            WidgetDescriptor {
-                id: 1,
-                display_hint: WireDisplayHint::IconValue,
-                state: WireWidgetState {
-                    data: vec![
-                        WireKeyValue { key: "temperature".into(), value: WireValue::String("5.4°C".into()) },
-                        WireKeyValue { key: "icon".into(), value: WireValue::String("cloud_rain".into()) },
-                    ],
-                    error: None,
-                },
+        widgets: vec![WidgetDescriptor {
+            id: 1,
+            display_hint: WireDisplayHint::IconValue,
+            state: WireWidgetState {
+                data: vec![
+                    WireKeyValue {
+                        key: "temperature".into(),
+                        value: WireValue::String("5.4°C".into()),
+                    },
+                    WireKeyValue {
+                        key: "icon".into(),
+                        value: WireValue::String("cloud_rain".into()),
+                    },
+                ],
+                error: None,
             },
-        ],
+        }],
     };
 
     let frame = encode(&msg).unwrap();
@@ -47,18 +50,17 @@ fn screen_update_round_trips() {
 #[test]
 fn data_update_round_trips() {
     let msg = ServerMessage::DataUpdate {
-        widgets: vec![
-            WidgetDescriptor {
-                id: 3,
-                display_hint: WireDisplayHint::TextBlock,
-                state: WireWidgetState {
-                    data: vec![
-                        WireKeyValue { key: "body".into(), value: WireValue::String("Breaking news...".into()) },
-                    ],
-                    error: None,
-                },
+        widgets: vec![WidgetDescriptor {
+            id: 3,
+            display_hint: WireDisplayHint::TextBlock,
+            state: WireWidgetState {
+                data: vec![WireKeyValue {
+                    key: "body".into(),
+                    value: WireValue::String("Breaking news...".into()),
+                }],
+                error: None,
             },
-        ],
+        }],
     };
 
     let frame = encode(&msg).unwrap();

docs/k-frame-spa-handoff.md

@@ -0,0 +1,147 @@
+# K-Frame SPA Handoff
+
+## What is K-Frame
+
+IoT dashboard system. Server aggregates data from configurable sources and pushes to ESP32 display clients via TCP. The server is fully functional — SQLite config, REST API, TCP broadcasting, data source polling. ESP32 firmware works end-to-end (display renders widgets). Now needs a config UI.
+
+## What this session should build
+
+A React SPA (config/admin UI) for the K-Frame server. The SPA is at `/mnt/drive/dev/k-frame/spa/` — fresh Vite + React 19 + shadcn/ui + TanStack Router + TanStack Query setup. Currently shows a placeholder page.
+
+## Existing artifacts to read first
+
+- **Design spec**: `docs/superpowers/specs/2026-06-18-k-frame-design.md`
+- **Domain glossary**: `CONTEXT.md`
+- **ADRs**: `docs/adr/0001-event-driven-cqrs.md`, `0002-static-dispatch-over-trait-objects.md`, `0003-postcard-over-flatbuffers.md`
+- **API types (DTO definitions)**: `crates/api-types/src/` — widget.rs, data_source.rs, layout.rs, preset.rs. These define the exact JSON shapes the API accepts/returns.
+
+## REST API (server runs on :3000)
+
+All endpoints return/accept JSON.
+
+| Method | Path | Description |
+|--------|------|-------------|
+| GET | /api/widgets | List all widgets |
+| POST | /api/widgets | Create widget |
+| GET | /api/widgets/{id} | Get widget |
+| PUT | /api/widgets/{id} | Update widget |
+| DELETE | /api/widgets/{id} | Delete widget |
+| GET | /api/data-sources | List all data sources |
+| POST | /api/data-sources | Create data source |
+| GET | /api/data-sources/{id} | Get data source |
+| PUT | /api/data-sources/{id} | Update data source |
+| DELETE | /api/data-sources/{id} | Delete data source |
+| GET | /api/layout | Get current layout (nullable) |
+| PUT | /api/layout | Update layout |
+| GET | /api/presets | List presets |
+| POST | /api/presets | Create preset |
+| GET | /api/presets/{id} | Get preset |
+| DELETE | /api/presets/{id} | Delete preset |
+| POST | /api/presets/{id}/load | Load preset as active layout |
+
+### Key JSON shapes
+
+**Widget** (create/update):
+```json
+{
+  "id": 1,
+  "name": "weather",
+  "display_hint": "icon_value",
+  "data_source_id": 10,
+  "mappings": [
+    {"source_path": "$.main.temp", "target_key": "temperature"},
+    {"source_path": "$.weather[0].icon", "target_key": "icon"}
+  ],
+  "max_data_size": 2048
+}
+```
+`display_hint` values: `"icon_value"`, `"text_block"`, `"key_value"`
+
+**Data Source** (create/update):
+```json
+{
+  "id": 10,
+  "name": "weather",
+  "source_type": "weather",
+  "poll_interval_secs": 300,
+  "url": "https://api.openweathermap.org/...",
+  "api_key": "xxx",
+  "headers": []
+}
+```
+`source_type` values: `"weather"`, `"media"`, `"rss"`, `"http_json"`, `"webhook"`
+
+**Layout**:
+```json
+{
+  "root": {
+    "type": "container",
+    "direction": "row",
+    "gap": 4,
+    "padding": 2,
+    "children": [
+      {
+        "sizing": {"type": "flex", "value": 1},
+        "node": {"type": "leaf", "widget_id": 1}
+      },
+      {
+        "sizing": {"type": "fixed", "value": 80},
+        "node": {"type": "leaf", "widget_id": 2}
+      }
+    ]
+  }
+}
+```
+Nodes are recursive — containers can nest.
+
+**Preset**:
+```json
+{"id": 1, "name": "dashboard", "layout": { "root": { ... } }}
+```
+
+## Pages to build
+
+1. **Dashboard** — overview of connected clients, active data sources, current layout. Landing page.
+2. **Data Sources** — CRUD list. Form: name, source_type (select), URL, API key, poll interval, headers.
+3. **Widgets** — CRUD list. Form: name, display_hint (select), data_source_id (select from existing sources), key mappings (dynamic list of source_path + target_key pairs), max_data_size.
+4. **Layout Builder** — visual tree editor. Add containers (row/column), nest them, place widgets as leaves, set sizing (fixed/flex), gap, padding. This is the most complex page.
+5. **Presets** — save current layout as preset, load presets, delete presets.
+
+## SPA tech stack (already set up)
+
+- React 19 + TypeScript
+- Vite 8
+- shadcn/ui (components already installed in `src/components/ui/`)
+- TanStack Router (not yet configured with routes)
+- TanStack Query (not yet configured with provider)
+- Tailwind CSS 4
+- Bun (lockfile is bun.lock)
+
+## Server integration
+
+The SPA's built files need to be served by the Axum server. Two approaches:
+1. **Dev**: SPA runs on Vite dev server (:5173), proxies API calls to :3000. Add proxy config to `vite.config.ts`.
+2. **Prod**: `bun run build` outputs to `spa/dist/`, Axum serves these as static files. Need to add static file serving to the http-api adapter.
+
+The Vite proxy setup is needed first so development works.
+
+## User preferences
+
+- Concise, no filler
+- No mocking — test against real API
+- Clean code, modules, no huge files
+- shadcn components for all UI elements
+- TanStack Router for routing, TanStack Query for data fetching
+- No Co-Authored-By in commits
+
+## What NOT to change
+
+- No changes to Rust crates (domain, application, adapters, etc.)
+- No changes to the ESP32 firmware
+- API is stable — build against it as-is
+
+## Suggested skills
+
+- `superpowers:brainstorming` — for designing the layout builder UX (most complex page)
+- `frontend-design` — for visual design direction, making it not look like a default template
+- `shadcn` — for component usage, composition, and styling patterns

spa/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

spa/.prettierignore

@@ -0,0 +1,7 @@
+node_modules/
+coverage/
+.pnpm-store/
+pnpm-lock.yaml
+package-lock.json
+pnpm-lock.yaml
+yarn.lock

spa/.prettierrc

@@ -0,0 +1,11 @@
+{
+  "endOfLine": "lf",
+  "semi": false,
+  "singleQuote": false,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "printWidth": 80,
+  "plugins": ["prettier-plugin-tailwindcss"],
+  "tailwindStylesheet": "src/index.css",
+  "tailwindFunctions": ["cn", "cva"]
+}

spa/README.md

@@ -0,0 +1,21 @@
+# React + TypeScript + Vite + shadcn/ui
+
+This is a template for a new Vite project with React, TypeScript, and shadcn/ui.
+
+## Adding components
+
+To add components to your app, run the following command:
+
+```bash
+npx shadcn@latest add button
+```
+
+This will place the ui components in the `src/components` directory.
+
+## Using components
+
+To use the components in your app, import them as follows:
+
+```tsx
+import { Button } from "@/components/ui/button"
+```

spa/components.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "radix-nova",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/index.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "rtl": false,
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "menuColor": "default",
+  "menuAccent": "subtle",
+  "registries": {}
+}

spa/eslint.config.js

@@ -0,0 +1,22 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      globals: globals.browser,
+    },
+  },
+])

spa/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>K-Frame</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

spa/package.json

@@ -0,0 +1,57 @@
+{
+  "name": "spa",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "format": "prettier --write \"**/*.{ts,tsx}\"",
+    "typecheck": "tsc --noEmit",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@base-ui/react": "^1.6.0",
+    "@fontsource-variable/geist": "^5.2.9",
+    "@tailwindcss/vite": "^4",
+    "@tanstack/react-query": "^5.101.0",
+    "@tanstack/react-router": "^1.170.16",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "cmdk": "^1.1.1",
+    "date-fns": "^4.4.0",
+    "embla-carousel-react": "^8.6.0",
+    "input-otp": "^1.4.2",
+    "lucide-react": "^1.21.0",
+    "next-themes": "^0.4.6",
+    "radix-ui": "^1.6.0",
+    "react": "^19.2.6",
+    "react-day-picker": "^10.0.1",
+    "react-dom": "^19.2.6",
+    "react-resizable-panels": "^4.11.2",
+    "recharts": "3.8.0",
+    "shadcn": "^4.11.0",
+    "sonner": "^2.0.7",
+    "tailwind-merge": "^3.6.0",
+    "tailwindcss": "^4",
+    "tw-animate-css": "^1.4.0",
+    "vaul": "^1.1.2"
+  },
+  "devDependencies": {
+    "@eslint/js": "^10",
+    "@types/node": "^24",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "@vitejs/plugin-react": "^6",
+    "eslint": "^10",
+    "eslint-plugin-react-hooks": "^7.1.1",
+    "eslint-plugin-react-refresh": "^0.5.2",
+    "globals": "^17",
+    "prettier": "^3.8.3",
+    "prettier-plugin-tailwindcss": "^0.8.0",
+    "typescript": "~6",
+    "typescript-eslint": "^8",
+    "vite": "^8"
+  }
+}

spa/public/vite.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

spa/src/api/client.ts

@@ -0,0 +1,28 @@
+const BASE = "/api"
+
+async function request<T>(path: string, init?: RequestInit): Promise<T> {
+  const res = await fetch(`${BASE}${path}`, {
+    ...init,
+    headers: {
+      "Content-Type": "application/json",
+      ...init?.headers,
+    },
+  })
+  if (!res.ok) {
+    const text = await res.text().catch(() => res.statusText)
+    throw new Error(`${res.status}: ${text}`)
+  }
+  if (res.status === 204) return undefined as T
+  const text = await res.text()
+  if (!text) return null as T
+  return JSON.parse(text)
+}
+
+export const api = {
+  get: <T>(path: string) => request<T>(path),
+  post: <T>(path: string, body: unknown) =>
+    request<T>(path, { method: "POST", body: JSON.stringify(body) }),
+  put: <T>(path: string, body: unknown) =>
+    request<T>(path, { method: "PUT", body: JSON.stringify(body) }),
+  delete: <T>(path: string) => request<T>(path, { method: "DELETE" }),
+}

spa/src/api/data-sources.ts

@@ -0,0 +1,50 @@
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query"
+import { api } from "./client"
+import type { DataSource } from "./types"
+
+const KEYS = {
+  all: ["data-sources"] as const,
+  one: (id: number) => ["data-sources", id] as const,
+}
+
+export function useDataSources() {
+  return useQuery({
+    queryKey: KEYS.all,
+    queryFn: () => api.get<DataSource[]>("/data-sources"),
+  })
+}
+
+export function useDataSource(id: number) {
+  return useQuery({
+    queryKey: KEYS.one(id),
+    queryFn: () => api.get<DataSource>(`/data-sources/${id}`),
+  })
+}
+
+export function useCreateDataSource() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (ds: DataSource) => api.post<DataSource>("/data-sources", ds),
+    onSuccess: () => qc.invalidateQueries({ queryKey: KEYS.all }),
+  })
+}
+
+export function useUpdateDataSource() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (ds: DataSource) =>
+      api.put<DataSource>(`/data-sources/${ds.id}`, ds),
+    onSuccess: (_, ds) => {
+      qc.invalidateQueries({ queryKey: KEYS.all })
+      qc.invalidateQueries({ queryKey: KEYS.one(ds.id) })
+    },
+  })
+}
+
+export function useDeleteDataSource() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (id: number) => api.delete(`/data-sources/${id}`),
+    onSuccess: () => qc.invalidateQueries({ queryKey: KEYS.all }),
+  })
+}

spa/src/api/layout.ts

@@ -0,0 +1,22 @@
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query"
+import { api } from "./client"
+import type { Layout } from "./types"
+
+const KEYS = {
+  current: ["layout"] as const,
+}
+
+export function useLayout() {
+  return useQuery({
+    queryKey: KEYS.current,
+    queryFn: () => api.get<Layout | null>("/layout"),
+  })
+}
+
+export function useUpdateLayout() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (layout: Layout) => api.put<Layout>("/layout", layout),
+    onSuccess: () => qc.invalidateQueries({ queryKey: KEYS.current }),
+  })
+}