feat: add notification sounds (#44)

### Explanation

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### Issue

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### Attestations

- [ ] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

- [ ] I have run the linter and resolved any errors.
- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
- [ ] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

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Reviewed-on: #44
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/routes/+page.svelte

@@ -1,7 +1,8 @@
 <script lang="ts">
-  import { onMount } from "svelte";
-  import { initializeTauriListeners } from "$lib/tauri";
+  import { onMount, onDestroy } from "svelte";
+  import { initializeTauriListeners, cleanupTauriListeners } from "$lib/tauri";
   import { configStore, applyTheme } from "$lib/stores/config";
+  import "$lib/notifications/testNotifications";
   import Terminal from "$lib/components/Terminal.svelte";
   import InputBar from "$lib/components/InputBar.svelte";
   import StatusBar from "$lib/components/StatusBar.svelte";
@@ -9,13 +10,25 @@
   import PermissionModal from "$lib/components/PermissionModal.svelte";
   import ConfigSidebar from "$lib/components/ConfigSidebar.svelte";
 
-  onMount(async () => {
-    await initializeTauriListeners();
-    await configStore.loadConfig();
+  let initialized = false;
 
-    // Apply saved theme on startup
-    const config = configStore.getConfig();
-    applyTheme(config.theme);
+  onMount(async () => {
+    if (!initialized) {
+      initialized = true;
+      await initializeTauriListeners();
+      await configStore.loadConfig();
+
+      // Apply saved theme on startup
+      const config = configStore.getConfig();
+      applyTheme(config.theme);
+    }
+  });
+
+  onDestroy(() => {
+    if (initialized) {
+      cleanupTauriListeners();
+      initialized = false;
+    }
   });
 </script>