fix(host-detail): move modals outside Suspense and auto-close Effect to parent

Modals rendered inside <Suspense> were unmounted each time the host
resource re-fetched, killing their reactive subscriptions and preventing
them from reopening. Moving them to the <div> level above <Suspense>
keeps them alive across re-fetches.

The auto-close Effect for the add-app modal is also moved from
AddAppModal to HostDetailPage so it is never recreated across
open/close cycles, avoiding the stale-value re-trigger bug.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/client/host_detail.rs

@@ -39,19 +39,6 @@ fn AddAppModal(
     // Full Application structs so names are available in the selected tag list.
     let selected: RwSignal<Vec<Application>> = RwSignal::new(vec![]);
 
-    // Close the modal when the action transitions from in-flight → completed with Ok.
-    // Tracking the pending→false transition (rather than watching value directly) avoids
-    // closing the modal on mount when value still holds a previous session's Ok result.
-    Effect::new(move |was_pending: Option<bool>| {
-        let is_pending = add_action.pending().get();
-        if was_pending == Some(true) && !is_pending {
-            if let Some(Ok(_)) = add_action.value().get() {
-                show_modal.set(false);
-            }
-        }
-        is_pending
-    });
-
     view! {
         <div class="modal-backdrop" on:click=move |_| show_modal.set(false)>
             <div class="modal" on:click=move |e| e.stop_propagation()>
@@ -258,6 +245,17 @@ pub fn HostDetailPage() -> impl IntoView {
     let show_delete_modal  = RwSignal::new(false);
     let show_add_app_modal = RwSignal::new(false);
 
+    // Auto-close the add-app modal when the action completes successfully.
+    // Lives here (not inside AddAppModal) so it is never recreated across modal open/close cycles.
+    Effect::new(move |was_pending: Option<bool>| {
+        let is_pending = add_app_action.pending().get();
+        if was_pending == Some(true) && !is_pending {
+            if let Some(Ok(_)) = add_app_action.value().get() {
+                show_add_app_modal.set(false);
+            }
+        }
+        is_pending
+    });
 
     // LocalResource avoids reading the resource outside <Suspense> during hydration,
     // which would cause a mismatch between the SSR-rendered fallback and the content
@@ -309,6 +307,25 @@ pub fn HostDetailPage() -> impl IntoView {
 
     view! {
         <div class="host-detail-page">
+            // Modals live OUTSIDE <Suspense> so they are not unmounted when the
+            // host resource re-fetches (which would kill their reactive subscriptions).
+            {move || show_add_app_modal.get().then(|| view! {
+                <AddAppModal
+                    host_id=host_id()
+                    available_apps_res=available_apps_res
+                    add_action=add_app_action
+                    show_modal=show_add_app_modal
+                />
+            })}
+            {move || show_delete_modal.get().then(|| view! {
+                <DeleteModal
+                    host_name=name_sig.get()
+                    delete_action=delete_action
+                    host_id=host_id()
+                    show_modal=show_delete_modal
+                />
+            })}
+
             <Suspense fallback=|| view! { <p class="empty">"Loading host…"</p> }>
                 {move || host.get().map(|r| match (*r).clone() {
                     Err(e) => view! {
@@ -317,7 +334,6 @@ pub fn HostDetailPage() -> impl IntoView {
 
                     Ok(detail) => {
                         let id           = detail.id;
-                        let modal_name   = detail.name.clone();
                         let port_count   = detail.ports.len();
                         let app_count    = detail.applications.len();
                         let ports        = detail.ports;
@@ -433,7 +449,7 @@ pub fn HostDetailPage() -> impl IntoView {
                                                         view! {
                                                             <option
                                                                 value=n.id.to_string()
-                                                                selected=(n.id == current)
+                                                                selected=n.id == current
                                                             >
                                                                 {label}
                                                             </option>
@@ -545,16 +561,6 @@ pub fn HostDetailPage() -> impl IntoView {
                                 </div>
                             </section>
 
-                            // ── Add applications modal ────────────────────────
-                            {move || show_add_app_modal.get().then(|| view! {
-                                <AddAppModal
-                                    host_id=id
-                                    available_apps_res=available_apps_res
-                                    add_action=add_app_action
-                                    show_modal=show_add_app_modal
-                                />
-                            })}
-
                             // ── Danger zone ───────────────────────────────────
                             <div class="danger-zone">
                                 <button
@@ -565,16 +571,6 @@ pub fn HostDetailPage() -> impl IntoView {
                                     "Delete host"
                                 </button>
                             </div>
-
-                            // ── Delete modal (conditional) ────────────────────
-                            {move || show_delete_modal.get().then(|| view! {
-                                <DeleteModal
-                                    host_name=modal_name.clone()
-                                    delete_action=delete_action
-                                    host_id=id
-                                    show_modal=show_delete_modal
-                                />
-                            })}
                         }.into_any()
                     }
                 })}