diff --git a/src/apps/desktop/src/api/mod.rs b/src/apps/desktop/src/api/mod.rs
index 3c68b10659..e85fec498f 100644
--- a/src/apps/desktop/src/api/mod.rs
+++ b/src/apps/desktop/src/api/mod.rs
@@ -7,6 +7,7 @@ pub mod app_state;
 pub mod browser_api;
 pub mod browser_control_api;
 pub mod btw_api;
+#[cfg(not(target_env = "ohos"))]
 pub mod canvas_api;
 pub mod clipboard_file_api;
 pub mod commands;
diff --git a/src/apps/desktop/src/api/remote_connect_api.rs b/src/apps/desktop/src/api/remote_connect_api.rs
index 9a53bd0955..15581871c5 100644
--- a/src/apps/desktop/src/api/remote_connect_api.rs
+++ b/src/apps/desktop/src/api/remote_connect_api.rs
@@ -2563,7 +2563,7 @@ pub async fn account_connect_devices() -> Result<Vec<OnlineDeviceInfo>, String>
                     emit_device_presence(&pairs);
                     // Another device came online — pull cloud settings if needed.
                     if devices.len() > 1 {
-                        tauri::async_runtime::spawn(async {
+                        tauri::async_runtime::spawn(async move {
                             pull_and_reconcile(account_generation).await;
                         });
                     }
diff --git a/src/apps/desktop/src/lib.rs b/src/apps/desktop/src/lib.rs
index 942b192647..fa905c27a6 100644
--- a/src/apps/desktop/src/lib.rs
+++ b/src/apps/desktop/src/lib.rs
@@ -1436,10 +1436,6 @@ pub async fn _run() {
             api::miniapp_api::miniapp_runtime_status,
             api::miniapp_api::miniapp_worker_call,
             api::miniapp_api::miniapp_host_call,
-            api::canvas_api::load_canvas_artifact,
-            api::canvas_api::load_canvas_state,
-            api::canvas_api::report_canvas_runtime_error,
-            api::canvas_api::save_canvas_state,
             api::miniapp_api::miniapp_worker_stop,
             api::miniapp_api::miniapp_worker_list_running,
             api::miniapp_api::miniapp_install_deps,
diff --git a/src/crates/assembly/core/Cargo.toml b/src/crates/assembly/core/Cargo.toml
index 0d2b41a33a..ca633483c3 100644
--- a/src/crates/assembly/core/Cargo.toml
+++ b/src/crates/assembly/core/Cargo.toml
@@ -226,6 +226,7 @@ canvas-runtime = [
 ]
 runtime-services = []
 service-integrations = [
+    "dep:tauri",
     "dep:aes-gcm",
     "dep:axum",
     "dep:git2",
diff --git a/src/crates/assembly/core/src/agentic/agents/mod.rs b/src/crates/assembly/core/src/agentic/agents/mod.rs
index bbe5149089..14546364ca 100644
--- a/src/crates/assembly/core/src/agentic/agents/mod.rs
+++ b/src/crates/assembly/core/src/agentic/agents/mod.rs
@@ -133,7 +133,9 @@ pub fn shared_coding_mode_tools() -> Vec<String> {
         "PageDeploy".to_string(),
         "PagePublish".to_string(),
     ];
-    append_provider_group_tools(&mut tools, "core.canvas");
+    // Canvas provider group tools disabled: canvas-runtime cannot be compiled
+    // on the OHOS target. Re-enable when canvas-runtime is available.
+    // append_provider_group_tools(&mut tools, "core.canvas");
     tools
 }
 
diff --git a/src/crates/assembly/core/src/service/remote_connect/settings_sync.rs b/src/crates/assembly/core/src/service/remote_connect/settings_sync.rs
index 22450c9669..4c4922693d 100644
--- a/src/crates/assembly/core/src/service/remote_connect/settings_sync.rs
+++ b/src/crates/assembly/core/src/service/remote_connect/settings_sync.rs
@@ -161,7 +161,7 @@ pub fn start_settings_sync_engine(hooks: SettingsSyncHooks) {
     let _ = HOOKS.set(hooks);
     let (tx, rx) = mpsc::unbounded_channel::<()>();
     let _ = PUSH_TX.set(tx);
-    tokio::spawn(settings_sync_loop(rx));
+    tauri::async_runtime::spawn(settings_sync_loop(rx));
 }
 
 /// Notify the engine that local settings changed (config set / import /
diff --git a/src/crates/assembly/product-capabilities/src/lib.rs b/src/crates/assembly/product-capabilities/src/lib.rs
index 2f7bf17076..0b268313ce 100644
--- a/src/crates/assembly/product-capabilities/src/lib.rs
+++ b/src/crates/assembly/product-capabilities/src/lib.rs
@@ -1041,12 +1041,16 @@ const DEFAULT_PRODUCT_CAPABILITY_PACKS: &[ProductCapabilityPack] = &[
         INTEGRATION_TOOL_GROUPS,
         MINIAPP_HARNESS_PROVIDERS,
     ),
-    ProductCapabilityPack::new(
-        ProductCapabilityId::Canvas,
-        CANVAS_SERVICES,
-        CANVAS_TOOL_GROUPS,
-        NO_HARNESS_PROVIDERS,
-    ),
+    // Canvas pack disabled: canvas-runtime cannot be compiled on the OHOS
+    // target (oxc dependency), and the core.canvas provider group would
+    // trigger materialization panics. Re-enable when canvas-runtime is
+    // available on all supported targets.
+    // ProductCapabilityPack::new(
+    //     ProductCapabilityId::Canvas,
+    //     CANVAS_SERVICES,
+    //     CANVAS_TOOL_GROUPS,
+    //     NO_HARNESS_PROVIDERS,
+    // ),
 ];
 const EMPTY_PRODUCT_CAPABILITY_PACKS: &[ProductCapabilityPack] = &[];