arch: push wire types out of ClientApp, extract event_service, cleanup dead code

- ClientApp stores domain types, RepaintCommand carries DisplayHint + Vec<(String,Value)>
- adapters no longer convert Wire→Domain (eliminated duplication in esp32 + desktop)
- event_service in application layer handles LayoutChanged/WebhookDataReceived/ThemeChanged
- bootstrap event_handler reduced to 10-line dispatcher
- polling_service reuses event_service::apply_and_broadcast (deduplicated broadcast pattern)
- AppState.config_service() replaces 11 inline ConfigService::new() calls
- delete unused poll_interval_secs parameter chain
- delete unused StoragePort/ClientConfig (zero implementations)

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

@@ -1,7 +1,7 @@
 use crate::AppState;
 use crate::extractors::AuthUser;
 use api_types::{CreateWidgetDto, WidgetDto};
-use application::ConfigService;
+
 use axum::{
     extract::{Path, State},
     http::StatusCode,
@@ -65,7 +65,7 @@ where
     let widget = body
         .into_domain()
         .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
-    let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
+    let svc = state.config_service();
     svc.create_widget(widget)
         .await
         .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
@@ -87,7 +87,7 @@ where
     let widget = body
         .into_domain()
         .map_err(|e| (StatusCode::BAD_REQUEST, e))?;
-    let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
+    let svc = state.config_service();
     svc.update_widget(widget)
         .await
         .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")))?;
@@ -105,7 +105,7 @@ where
     E: EventPublisher,
     E::Error: std::fmt::Debug,
 {
-    let svc = ConfigService::new(state.config.as_ref(), state.events.as_ref());
+    let svc = state.config_service();
     svc.delete_widget(id)
         .await
         .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;