fix(web): clean up wasm32 build warnings and wire /play route to Bevy canvas

- solitaire_data/sync_client.rs: fix SyncPayload/SyncResponse import split
  (SyncResponse is needed by LocalOnlyProvider which compiles on wasm32)
- solitaire_engine/assets/sources.rs: cfg-gate AssetApp/AssetSourceBuilder
  imports (only used in the non-wasm FileAssetReader block)
- solitaire_engine/auto_complete_plugin.rs: cfg-gate AUTO_COMPLETE_CHIME_VOLUME
- solitaire_engine/daily_challenge_plugin.rs: cfg-gate Task/AsyncComputeTaskPool
  imports and DailyChallengeTask struct (server fetch systems are non-wasm only)
- solitaire_engine/resources.rs: cfg-gate std::sync::Arc (TokioRuntimeResource
  is non-wasm only)
- solitaire_engine/settings_plugin.rs: cfg-gate ScanThemes variant, pill_button,
  and their match arms; fix refresh_registry import placement
- solitaire_server/src/lib.rs: point /play route at play.html (Bevy canvas);
  keep /play-classic serving game.html during transition period
- build_wasm.sh: add --no-typescript to wasm-bindgen call for canvas build
- solitaire_server/web/pkg: add canvas.js + canvas_bg.wasm build artifacts

wasm32 build and native clippy --workspace -D warnings both clean.

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

build_wasm.sh

@@ -58,6 +58,7 @@ wasm-bindgen \
     --out-dir "$OUT_DIR" \
     --out-name canvas \
     --target web \
+    --no-typescript \
     "$REPO_ROOT/target/wasm32-unknown-unknown/release/solitaire_web.wasm"
 
 # Optional size optimisation — Bevy bundles are large (~5-15 MB uncompressed).

solitaire_data/src/sync_client.rs

@@ -12,7 +12,9 @@
 //! without matching on [`SyncBackend`] anywhere else in the codebase.
 
 use async_trait::async_trait;
-use solitaire_sync::{ChallengeGoal, LeaderboardEntry, SyncPayload, SyncResponse};
+use solitaire_sync::{SyncPayload, SyncResponse};
+#[cfg(not(target_arch = "wasm32"))]
+use solitaire_sync::{ChallengeGoal, LeaderboardEntry};
 
 use crate::{SyncError, SyncProvider};
 

solitaire_engine/src/assets/sources.rs

@@ -47,7 +47,9 @@
 //! comments on each call out the pairing so a future reader doesn't
 //! accidentally drop one half.
 
+#[cfg(not(target_arch = "wasm32"))]
 use bevy::asset::AssetApp;
+#[cfg(not(target_arch = "wasm32"))]
 use bevy::asset::io::AssetSourceBuilder;
 use bevy::asset::io::embedded::EmbeddedAssetRegistry;
 #[cfg(not(target_arch = "wasm32"))]

solitaire_engine/src/auto_complete_plugin.rs

@@ -22,6 +22,7 @@ use crate::resources::GameStateResource;
 ///
 /// Plays the win fanfare at half volume so it is clearly distinguishable from
 /// both normal card-place sounds and the full win fanfare that fires later.
+#[cfg(not(target_arch = "wasm32"))]
 const AUTO_COMPLETE_CHIME_VOLUME: f64 = 0.5;
 
 /// Seconds between consecutive auto-complete moves.

solitaire_engine/src/daily_challenge_plugin.rs

@@ -13,9 +13,11 @@
 
 use bevy::input::ButtonInput;
 use bevy::prelude::*;
-use bevy::tasks::{AsyncComputeTaskPool, Task, futures_lite::future};
 use chrono::{DateTime, Duration, Local, NaiveDate, Utc};
 use solitaire_data::{daily_seed_for, save_progress_to};
+#[cfg(not(target_arch = "wasm32"))]
+use bevy::tasks::{AsyncComputeTaskPool, Task, futures_lite::future};
+#[cfg(not(target_arch = "wasm32"))]
 use solitaire_sync::ChallengeGoal;
 
 use crate::events::{
@@ -78,8 +80,13 @@ pub struct DailyChallengeCompletedEvent {
 /// Holds the in-flight server challenge fetch so the result can be polled
 /// each frame without blocking the main thread.
 #[derive(Resource, Default)]
+#[cfg(not(target_arch = "wasm32"))]
 struct DailyChallengeTask(Option<Task<Option<ChallengeGoal>>>);
 
+#[derive(Resource, Default)]
+#[cfg(target_arch = "wasm32")]
+struct DailyChallengeTask;
+
 /// Tracks which `DailyChallengeResource::date` the expiry-warning toast has
 /// already fired for, so the toast spawns at most once per day.
 ///

solitaire_engine/src/resources.rs

@@ -1,5 +1,6 @@
 //! Bevy resources owned by the engine crate.
 
+#[cfg(not(target_arch = "wasm32"))]
 use std::sync::Arc;
 
 use bevy::math::Vec2;

solitaire_engine/src/settings_plugin.rs

@@ -33,9 +33,9 @@ use crate::events::{
 use crate::font_plugin::FontResource;
 use crate::progress_plugin::ProgressResource;
 use crate::resources::{SettingsScrollPos, SyncStatus, SyncStatusResource};
-use crate::theme::{ThemeThumbnailCache, ThemeThumbnailPair, refresh_registry};
+use crate::theme::{ThemeThumbnailCache, ThemeThumbnailPair};
 #[cfg(not(target_arch = "wasm32"))]
-use crate::theme::{ImportError, import_theme};
+use crate::theme::{ImportError, import_theme, refresh_registry};
 use crate::ui_focus::{FocusGroup, FocusRow, Focusable, FocusedButton};
 use crate::ui_modal::{
     ButtonVariant, ModalButton, ModalScrim, spawn_modal, spawn_modal_actions, spawn_modal_button,
@@ -256,6 +256,7 @@ enum SettingsButton {
     /// local-only mode.
     ToggleAnalytics,
     /// Scan `user_theme_dir()` for new `.zip` files and import each one.
+    #[cfg(not(target_arch = "wasm32"))]
     ScanThemes,
     SyncNow,
     /// Open the sync-server Connect modal (shown when backend = Local).
@@ -318,6 +319,7 @@ impl SettingsButton {
             SettingsButton::SelectCardBack(_) => 70,
             SettingsButton::SelectBackground(_) => 80,
             SettingsButton::SelectTheme(_) => 85,
+            #[cfg(not(target_arch = "wasm32"))]
             SettingsButton::ScanThemes => 86,
             // Sync section
             SettingsButton::SyncNow => 90,
@@ -1256,6 +1258,7 @@ fn handle_settings_buttons(
                     changed.write(SettingsChangedEvent(settings.0.clone()));
                 }
             }
+            #[cfg(not(target_arch = "wasm32"))]
             SettingsButton::ScanThemes => {
                 // Handled by `handle_scan_themes`.
             }
@@ -2723,6 +2726,7 @@ fn handle_scan_themes(
     }
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 /// A small pill-shaped settings button, matching the style used in `sync_row`.
 fn pill_button(
     parent: &mut ChildSpawnerCommands,

solitaire_server/src/lib.rs

@@ -214,6 +214,11 @@ fn build_router_inner(state: AppState, rate_limit: bool) -> Router {
         )
         .route(
             "/play",
+            get(|| async { Html(include_str!("../web/play.html")) }),
+        )
+        // Legacy HTML/JS web game kept during transition; remove once Bevy canvas reaches parity.
+        .route(
+            "/play-classic",
             get(|| async { Html(include_str!("../web/game.html")) }),
         )
         .route(