feat(build): generate slot target objects

Add generated targets::<slot> wrapper objects so partial swaps read as target.put/append/replace while preserving existing lower-aware commands and IntoEffect wiring.

req: dx/006

req: codegen/001

req: codegen/002

req: component/003

examples/kanban/README.md

@@ -11,7 +11,7 @@ The example is a server-first Kanban board with:
 - add-card form
 - move-left / move-right card controls
 - delete-card controls
-- generated resource commands for checked slot updates
+- generated target objects for checked slot updates
 - tuple-composed `IntoEffect` / `application/slhx` responses
 - SSE presence updates
 

examples/kanban/src/lib.rs

@@ -27,7 +27,7 @@ mod tests {
     #[test]
     fn kanban_board_updates_generated_slot() {
         fn render_board() -> impl IntoEffect {
-            super::ui::put(board::slots::board, &empty_board())
+            board::targets::board.put(&empty_board())
         }
 
         let effect = inspect(render_board());

examples/kanban/src/main.rs

@@ -10,7 +10,7 @@ use slhx_axum::{
     InteractionRequest, PageRequest,
 };
 use slhx_kanban_example::ui::{self, board as board_ui};
-use slhx_kanban_example::ui::board::{forms, handles, slots};
+use slhx_kanban_example::ui::board::{forms, handles, slots, targets};
 use slhx_kanban_example::ui::board_card::handles as card_handles;
 use std::collections::BTreeMap;
 use std::convert::Infallible;
@@ -138,13 +138,13 @@ async fn interact(
 // req: push/001 req: push/003 req: examples/001
 async fn events(Query(params): Query<BTreeMap<String, String>>) -> impl IntoResponse {
     if params.contains_key("once") {
-        let effect = ui::put(slots::presence, &Presence { count: 1 });
+        let effect = targets::presence.put(&Presence { count: 1 });
         return sse(stream::iter([Ok::<_, Infallible>(effect.into_batch(ui::BUILD_FINGERPRINT))]).boxed());
     }
 
     let batches = stream::unfold(1_u64, |count| async move {
         tokio::time::sleep(Duration::from_secs(4)).await;
-        let effect = ui::put(slots::presence, &Presence { count });
+        let effect = targets::presence.put(&Presence { count });
         Some((Ok::<_, Infallible>(effect.into_batch(ui::BUILD_FINGERPRINT)), count + 1))
     })
     .boxed();
@@ -206,7 +206,7 @@ fn registry(state: Arc<AppState>) -> impl DispatchRegistry {
 
 fn board_effects(board: &BoardState, notice: &'static str) -> impl IntoEffect {
     (
-        ui::put(slots::board, &board_view(board)),
+        targets::board.put(&board_view(board)),
         slots::notice.text(notice),
         forms::create_card.clear("title"),
     )