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/client-application/tests/client_app_tests.rs

@@ -1,4 +1,4 @@
-use client_application::{ClientApp, RepaintCommand};
+use client_application::ClientApp;
 use client_domain::BoundingBox;
 use protocol::{
     ServerMessage, WidgetDescriptor, WireAlignItems, WireContainerNode, WireDirection,
@@ -84,8 +84,8 @@ fn data_update_only_repaints_changed_widgets() {
     assert_eq!(repaints.len(), 1);
     assert_eq!(repaints[0].widget_id, 1);
     assert_eq!(
-        repaints[0].state.data[0].value,
-        WireValue::String("6.1°C".into())
+        repaints[0].data[0],
+        ("temperature".into(), domain::Value::String("6.1°C".into()))
     );
 }