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>

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(