Fix braindump display and switching issues

- Add echo API endpoint for Echo component
- Export Echo component from ui crate to fix compilation errors
- Fix notes not showing after save by adding refresh_notes callback that updates the notes resource
- Fix note content not updating when switching notes by using reactive signal for note_id which triggers note resource reload on prop changes

💘 Generated with Crush

packages/api/src/lib.rs

@@ -113,3 +113,8 @@ pub async fn toggle_pin_note(id: String) -> Result<(), ServerFnError> {
         Err(ServerFnError::new("Note not found".to_string()))
     }
 }
+
+#[post("/api/echo")]
+pub async fn echo(message: String) -> Result<String, ServerFnError> {
+    Ok(format!("Echo: {}", message))
+}

packages/ui/src/lib.rs

@@ -1,7 +1,10 @@
-//! This crate contains all shared UI for the workspace.
+//! This is the UI package for the braindump application.
 
 mod hero;
 pub use hero::Hero;
 
 mod navbar;
 pub use navbar::Navbar;
+
+mod echo;
+pub use echo::Echo;

packages/web/src/braindump.rs

@@ -14,6 +14,17 @@ fn BraindumpLayout() -> Element {
         api::list_notes().await.unwrap_or_default()
     });
     
+    let refresh_notes = {
+        let mut notes_ref = notes.clone();
+        move || {
+            spawn(async move {
+                if let Ok(new_notes) = api::list_notes().await {
+                    notes_ref.set(Some(new_notes));
+                }
+            });
+        }
+    };
+
     let mut selected_note_id = use_signal(|| None::<String>);
     let search_query = use_signal(|| String::new());
     let filter_tag = use_signal(|| None::<String>);
@@ -40,6 +51,11 @@ fn BraindumpLayout() -> Element {
                             on_go_back: move |_| {
                                 selected_note_id.set(None);
                             },
+                            on_save: refresh_notes,
+                            on_delete: move |_| {
+                                selected_note_id.set(None);
+                                refresh_notes();
+                            },
                         }
                     },
                     None => rsx! {
@@ -52,6 +68,7 @@ fn BraindumpLayout() -> Element {
                                         vec![]
                                     ).await {
                                         selected_note_id.set(Some(id));
+                                        refresh_notes();
                                     }
                                 });
                             }
@@ -158,7 +175,6 @@ fn SidebarContent(
                 div { class: "tags-section",
                     div { class: "tags-label", "Tags" }
                     div { class: "tags-list",
-                        // Tag filtering placeholder
                         button { class: "tag", "Work" }
                         button { class: "tag", "Personal" }
                         button { class: "tag", "Ideas" }
@@ -243,10 +259,16 @@ fn EmptyState(on_new_note: EventHandler<MouseEvent>) -> Element {
 }
 
 #[component]
-fn NoteEditor(note_id: String, on_go_back: EventHandler<MouseEvent>) -> Element {
-    let note_id_clone_for_resource = note_id.clone();
+fn NoteEditor(
+    note_id: String,
+    on_go_back: Callback<MouseEvent>,
+    on_save: Callback<()>,
+    on_delete: Callback<()>,
+) -> Element {
+    let mut note_id_signal = use_signal(|| note_id.clone());
+
     let note = use_resource(move || {
-        let id = note_id_clone_for_resource.clone();
+        let id = note_id_signal().clone();
         async move {
             api::get_note(id).await.ok()
         }
@@ -257,6 +279,10 @@ fn NoteEditor(note_id: String, on_go_back: EventHandler<MouseEvent>) -> Element
     let mut tags = use_signal(|| String::new());
     let mut is_pinned = use_signal(|| false);
 
+    use_effect(move || {
+        note_id_signal.set(note_id.clone());
+    });
+
     use_effect(move || {
         let note_val = note.read_unchecked();
         if let Some(Some(n)) = note_val.as_ref() {
@@ -267,9 +293,8 @@ fn NoteEditor(note_id: String, on_go_back: EventHandler<MouseEvent>) -> Element
         }
     });
 
-    let note_id_for_save = note_id.clone();
     let save_note = move |_: MouseEvent| {
-        let id = note_id_for_save.clone();
+        let id = note_id_signal().clone();
         let title_val = title();
         let content_val = content();
         let tags_input = tags();
@@ -282,24 +307,25 @@ fn NoteEditor(note_id: String, on_go_back: EventHandler<MouseEvent>) -> Element
 
         spawn(async move {
             let _ = api::update_note(id, title_val, content_val, tags_list, pinned).await;
+            on_save(());
         });
     };
 
-    let note_id_for_delete = note_id.clone();
     let delete_note = move |_: MouseEvent| {
-        let id = note_id_for_delete.clone();
+        let id = note_id_signal().clone();
         spawn(async move {
             let _ = api::delete_note(id).await;
+            on_delete(());
         });
     };
 
-    let note_id_for_toggle = note_id.clone();
     let toggle_pin = move |_: MouseEvent| {
-        let id = note_id_for_toggle.clone();
+        let id = note_id_signal().clone();
         let current_pin = is_pinned();
         spawn(async move {
             let _ = api::toggle_pin_note(id).await;
             is_pinned.set(!current_pin);
+            on_save(());
         });
     };
 
@@ -308,7 +334,7 @@ fn NoteEditor(note_id: String, on_go_back: EventHandler<MouseEvent>) -> Element
             div { class: "editor-header",
                 button {
                     class: "back-button",
-                    onclick: move |evt| on_go_back.call(evt),
+                    onclick: on_go_back,
                     "← Back"
                 }
                 div { class: "editor-actions",