add all crates: domain, protocol, application, client, adapters, ESP32 firmware

Server: domain (entities, value objects, ports), protocol (postcard wire types),
application (config service, data projection), adapters (config-memory, tcp-server),
bootstrap (composition root with fake data).

Client: client-domain (layout engine, render tree, HAL ports),
client-application (message handling, repaint commands),
adapters (tcp-client, display-terminal), client-desktop (end-to-end working).

ESP32: client-esp32 firmware with ILI9341 display over SPI, WiFi networking.
Display test verified on hardware — landscape orientation, text rendering works.

60 workspace tests, all passing.

crates/bootstrap/src/main.rs

@@ -0,0 +1,94 @@
+use std::sync::Arc;
+use std::time::Duration;
+use domain::{
+    ConfigRepository, BroadcastPort,
+    WidgetConfig, DisplayHint, KeyMapping,
+    Layout, LayoutNode, ContainerNode, LayoutChild, Direction, Sizing,
+    Value, WidgetState,
+};
+use application::{ConfigService, DataProjection};
+use config_memory::MemoryConfigStore;
+use tcp_server::{TcpBroadcaster, TcpEventBus, run_tcp_server};
+
+#[tokio::main]
+async fn main() {
+    let config_store = Arc::new(MemoryConfigStore::new());
+    let event_bus = Arc::new(TcpEventBus::new(64));
+    let broadcaster = Arc::new(TcpBroadcaster::new(64));
+
+    let service = ConfigService::new(config_store.as_ref(), event_bus.as_ref());
+
+    service.create_widget(WidgetConfig::new(
+        1, "weather".into(), DisplayHint::IconValue, 1,
+        vec![
+            KeyMapping { source_path: "$.temperature".into(), target_key: "value".into() },
+            KeyMapping { source_path: "$.icon".into(), target_key: "icon".into() },
+        ],
+    )).await.unwrap();
+
+    service.create_widget(WidgetConfig::new(
+        2, "portfolio".into(), DisplayHint::KeyValue, 2,
+        vec![
+            KeyMapping { source_path: "$.amount".into(), target_key: "value".into() },
+        ],
+    )).await.unwrap();
+
+    let layout = Layout {
+        root: LayoutNode::Container(ContainerNode {
+            direction: Direction::Row,
+            gap: 4,
+            padding: 2,
+            children: vec![
+                LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(1) },
+                LayoutChild { sizing: Sizing::Flex(1), node: LayoutNode::Leaf(2) },
+            ],
+        }),
+    };
+    service.update_layout(layout).await.unwrap();
+
+    let bc = broadcaster.clone();
+    tokio::spawn(async move {
+        run_tcp_server("0.0.0.0:2699", bc).await.unwrap();
+    });
+
+    println!("Server running on :2699");
+    println!("Sending fake data every 3 seconds...");
+
+    let mut projection = DataProjection::new();
+    let mut counter = 0u32;
+
+    loop {
+        tokio::time::sleep(Duration::from_secs(3)).await;
+        counter += 1;
+
+        let widgets = config_store.list_widgets().await.unwrap();
+        let layout = config_store.get_layout().await.unwrap();
+
+        let weather_data = Value::Object(std::collections::BTreeMap::from([
+            ("temperature".into(), Value::String(format!("{}.{}°C", 5 + counter % 10, counter % 10))),
+            ("icon".into(), Value::String("sunny".into())),
+        ]));
+
+        let portfolio_data = Value::Object(std::collections::BTreeMap::from([
+            ("amount".into(), Value::String(format!("{}.{} PLN", 100 + counter, counter % 100))),
+        ]));
+
+        let changed_weather = projection.apply_poll_result(1, &weather_data, &widgets);
+        let changed_portfolio = projection.apply_poll_result(2, &portfolio_data, &widgets);
+
+        let mut all_changed: Vec<(u16, WidgetState)> = Vec::new();
+        all_changed.extend(changed_weather);
+        all_changed.extend(changed_portfolio);
+
+        if !all_changed.is_empty() {
+            if counter == 1 {
+                if let Some(l) = &layout {
+                    broadcaster.push_screen_update(l, &all_changed).await.unwrap();
+                }
+            } else {
+                broadcaster.push_data_update(&all_changed).await.unwrap();
+            }
+            println!("Pushed {} widget updates (tick {counter})", all_changed.len());
+        }
+    }
+}