diff --git a/desktop/src/App.tsx b/desktop/src/App.tsx
index df43321..f4e2b35 100644
--- a/desktop/src/App.tsx
+++ b/desktop/src/App.tsx
@@ -261,63 +261,65 @@ function App() {
         // Non-critical, continue without heartbeat
       }
 
-      // Step 5: Restore embedding config to Rust backend
-      try {
-        // Migrate plaintext embedding apiKey to secure storage if present
+      // Step 5: Restore embedding config to Rust backend (Tauri-only)
+      if (isTauriRuntime()) {
         try {
-          const embStored = localStorage.getItem('zclaw-embedding-config');
-          if (embStored) {
-            const embParsed = JSON.parse(embStored);
-            if (embParsed.apiKey && embParsed.apiKey.trim()) {
-              const { saveEmbeddingApiKey } = await import('./lib/embedding-client');
-              const { secureStorage } = await import('./lib/secure-storage');
-              // Only migrate if not already in secure storage
-              const existing = await secureStorage.get('zclaw-secure-embedding-apikey');
-              if (!existing) {
-                await saveEmbeddingApiKey(embParsed.apiKey);
+          // Migrate plaintext embedding apiKey to secure storage if present
+          try {
+            const embStored = localStorage.getItem('zclaw-embedding-config');
+            if (embStored) {
+              const embParsed = JSON.parse(embStored);
+              if (embParsed.apiKey && embParsed.apiKey.trim()) {
+                const { saveEmbeddingApiKey } = await import('./lib/embedding-client');
+                const { secureStorage } = await import('./lib/secure-storage');
+                // Only migrate if not already in secure storage
+                const existing = await secureStorage.get('zclaw-secure-embedding-apikey');
+                if (!existing) {
+                  await saveEmbeddingApiKey(embParsed.apiKey);
+                }
+                // Strip apiKey from localStorage
+                const { apiKey: _, ...stripped } = embParsed;
+                localStorage.setItem('zclaw-embedding-config', JSON.stringify(stripped));
               }
-              // Strip apiKey from localStorage
-              const { apiKey: _, ...stripped } = embParsed;
-              localStorage.setItem('zclaw-embedding-config', JSON.stringify(stripped));
             }
+          } catch { /* migration failure is non-critical */ }
+
+          const embConfig = loadEmbeddingConfig();
+          const embApiKey = await loadEmbeddingApiKey();
+          if (embConfig.enabled && embConfig.provider !== 'local' && embApiKey) {
+            setBootstrapStatus('Restoring embedding configuration...');
+            await invoke('viking_configure_embedding', {
+              provider: embConfig.provider,
+              apiKey: embApiKey,
+              model: embConfig.model || undefined,
+              endpoint: embConfig.endpoint || undefined,
+            });
+            log.debug('Embedding configuration restored to backend');
           }
-        } catch { /* migration failure is non-critical */ }
-
-        const embConfig = loadEmbeddingConfig();
-        const embApiKey = await loadEmbeddingApiKey();
-        if (embConfig.enabled && embConfig.provider !== 'local' && embApiKey) {
-          setBootstrapStatus('Restoring embedding configuration...');
-          await invoke('viking_configure_embedding', {
-            provider: embConfig.provider,
-            apiKey: embApiKey,
-            model: embConfig.model || undefined,
-            endpoint: embConfig.endpoint || undefined,
-          });
-          log.debug('Embedding configuration restored to backend');
+        } catch (embErr) {
+          log.warn('Failed to restore embedding config:', embErr);
+          // Non-critical, semantic search will fall back to TF-IDF
         }
-      } catch (embErr) {
-        log.warn('Failed to restore embedding config:', embErr);
-        // Non-critical, semantic search will fall back to TF-IDF
-      }
 
-      // Step 5b: Configure summary driver using active LLM (for L0/L1 generation)
-      try {
-        const { getDefaultModelConfigAsync, migrateModelApiKeysToSecureStorage } = await import('./store/connectionStore');
-        // Migrate any plaintext API keys to secure storage (idempotent)
-        await migrateModelApiKeysToSecureStorage();
-        const modelConfig = await getDefaultModelConfigAsync();
-        if (modelConfig && modelConfig.apiKey && modelConfig.baseUrl) {
-          setBootstrapStatus('Configuring summary driver...');
-          await invoke('viking_configure_summary_driver', {
-            endpoint: modelConfig.baseUrl,
-            apiKey: modelConfig.apiKey,
-            model: modelConfig.model || undefined,
-          });
-          log.debug('Summary driver configured with active LLM');
+        // Step 5b: Configure summary driver using active LLM (for L0/L1 generation)
+        try {
+          const { getDefaultModelConfigAsync, migrateModelApiKeysToSecureStorage } = await import('./store/connectionStore');
+          // Migrate any plaintext API keys to secure storage (idempotent)
+          await migrateModelApiKeysToSecureStorage();
+          const modelConfig = await getDefaultModelConfigAsync();
+          if (modelConfig && modelConfig.apiKey && modelConfig.baseUrl) {
+            setBootstrapStatus('Configuring summary driver...');
+            await invoke('viking_configure_summary_driver', {
+              endpoint: modelConfig.baseUrl,
+              apiKey: modelConfig.apiKey,
+              model: modelConfig.model || undefined,
+            });
+            log.debug('Summary driver configured with active LLM');
+          }
+        } catch (sumErr) {
+          log.warn('Failed to configure summary driver:', sumErr);
+          // Non-critical, summaries won't be auto-generated
         }
-      } catch (sumErr) {
-        log.warn('Failed to configure summary driver:', sumErr);
-        // Non-critical, summaries won't be auto-generated
       }
 
       // Step 6: Bootstrap complete
diff --git a/desktop/src/store/saasStore.ts b/desktop/src/store/saasStore.ts
index 3be4bfa..0c49766 100644
--- a/desktop/src/store/saasStore.ts
+++ b/desktop/src/store/saasStore.ts
@@ -542,7 +542,7 @@ export const useSaaSStore = create<SaaSStore>((set, get) => {
         const kernelConfigs = result.configs.filter(
           (c) => kernelCategories.includes(c.category) && c.value !== null
         );
-        if (kernelConfigs.length > 0) {
+        if (kernelConfigs.length > 0 && typeof window !== 'undefined' && '__TAURI_INTERNALS__' in window) {
           try {
             const { invoke } = await import('@tauri-apps/api/core');
             await invoke('kernel_apply_saas_config', {