Fix release build: box CallPanel's in-call subtree to avoid recursion limit

Mesh calling's nested Show/For inside ChatShell's own Show inlined as a
type parameter, blowing rustc's query recursion limit during the wasm
release build (CI: "queries overflow the depth limit!"). Splitting the
in-call view into its own component and type-erasing both CallPanel
branches with .into_any() keeps the type shallow instead of raising the
crate-wide limit.

src/app.rs

@@ -472,45 +472,70 @@ fn CallPanel(room: Memo<String>, me: String) -> impl IntoView {
 
         view! {
             <div class="call-panel">
-                <Show
-                    when=move || in_call.get()
-                    fallback=move || {
+                {move || {
+                    if in_call.get() {
+                        view! {
+                            <CallActive
+                                local_video_ref=local_video_ref
+                                call_state=call_state.get_value()
+                                on_leave=on_leave
+                            />
+                        }
+                            .into_any()
+                    } else {
                         view! {
                             <button class="call-join" on:click=on_join>
                                 "☎ join call"
                             </button>
                         }
+                            .into_any()
                     }
-                >
-                    <div class="call-active">
-                        <div class="video-grid">
-                            <video
-                                class="video-tile video-tile-local"
-                                node_ref=local_video_ref
-                                autoplay=true
-                                muted=true
-                                playsinline=true
-                            ></video>
-                            <For
-                                each=move || call_state.get_value().peer_streams()
-                                key=|(id, _)| id.clone()
-                                children=move |(_id, stream)| {
-                                    view! { <PeerVideoTile stream=stream/> }
-                                }
-                            />
-                        </div>
-                        <button class="call-leave" on:click=on_leave>
-                            "⏏ leave call"
-                        </button>
-                    </div>
-                </Show>
+                }}
             </div>
         }
+            .into_any()
     }
     #[cfg(not(feature = "hydrate"))]
     {
         let _ = (room, me);
-        view! { <div class="call-panel"></div> }
+        view! { <div class="call-panel"></div> }.into_any()
+    }
+}
+
+/// The in-call subtree (video grid + leave button), split out of
+/// `CallPanel` so its `<For>`-over-peers view doesn't get inlined as a type
+/// parameter of `CallPanel`'s own `if`/`else` branch - that inlining is what
+/// was blowing the compiler's query recursion limit once mesh calling's
+/// nested `Show`/`For` landed inside `ChatShell`'s own `Show`.
+#[cfg(feature = "hydrate")]
+#[component]
+fn CallActive(
+    local_video_ref: NodeRef<leptos::html::Video>,
+    call_state: crate::webrtc::CallState,
+    on_leave: impl Fn(leptos::ev::MouseEvent) + 'static,
+) -> impl IntoView {
+    view! {
+        <div class="call-active">
+            <div class="video-grid">
+                <video
+                    class="video-tile video-tile-local"
+                    node_ref=local_video_ref
+                    autoplay=true
+                    muted=true
+                    playsinline=true
+                ></video>
+                <For
+                    each=move || call_state.peer_streams()
+                    key=|(id, _)| id.clone()
+                    children=move |(_id, stream)| {
+                        view! { <PeerVideoTile stream=stream/> }
+                    }
+                />
+            </div>
+            <button class="call-leave" on:click=on_leave>
+                "⏏ leave call"
+            </button>
+        </div>
     }
 }