diff --git a/desktop/src-tauri/capabilities/default.json b/desktop/src-tauri/capabilities/default.json
index 02123d46..758ad77c 100644
--- a/desktop/src-tauri/capabilities/default.json
+++ b/desktop/src-tauri/capabilities/default.json
@@ -100,6 +100,7 @@
     },
     "dialog:allow-open",
     "dialog:allow-save",
+    "dialog:allow-message",
     "notification:default",
     "process:allow-exit",
     "process:allow-restart",
diff --git a/desktop/src/__tests__/tauriCapabilities.test.ts b/desktop/src/__tests__/tauriCapabilities.test.ts
new file mode 100644
index 00000000..68e6bf65
--- /dev/null
+++ b/desktop/src/__tests__/tauriCapabilities.test.ts
@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+import defaultCapabilityJson from '../../src-tauri/capabilities/default.json?raw'
+
+function readDefaultCapabilityPermissions(): string[] {
+  const capability = JSON.parse(defaultCapabilityJson) as {
+    permissions?: unknown[]
+  }
+
+  return (capability.permissions ?? []).filter((permission): permission is string =>
+    typeof permission === 'string'
+  )
+}
+
+describe('Tauri default capability', () => {
+  it('allows the dialog message API used by Tauri alert/confirm shims', () => {
+    const permissions = readDefaultCapabilityPermissions()
+
+    expect(
+      permissions.some(permission =>
+        permission === 'dialog:default' || permission === 'dialog:allow-message'
+      )
+    ).toBe(true)
+  })
+
+  it('keeps file dialog access enabled', () => {
+    const permissions = readDefaultCapabilityPermissions()
+
+    expect(permissions).toContain('dialog:allow-open')
+    expect(permissions).toContain('dialog:allow-save')
+  })
+})