Fix provider API key validation trimming (#810)

tests/unit/provider-store-validation.test.ts

@@ -0,0 +1,42 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const mockFetchProviderSnapshot = vi.fn();
+const mockHostApiFetch = vi.fn();
+
+vi.mock('@/lib/provider-accounts', () => ({
+  fetchProviderSnapshot: (...args: unknown[]) => mockFetchProviderSnapshot(...args),
+}));
+
+vi.mock('@/lib/host-api', () => ({
+  hostApiFetch: (...args: unknown[]) => mockHostApiFetch(...args),
+}));
+
+import { useProviderStore } from '@/stores/providers';
+
+describe('useProviderStore – validateAccountApiKey()', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('trims API keys before sending provider validation requests', async () => {
+    mockHostApiFetch.mockResolvedValueOnce({ valid: true });
+
+    const result = await useProviderStore.getState().validateAccountApiKey('custom', '  sk-lm-test \n', {
+      baseUrl: 'http://127.0.0.1:1234/v1',
+      apiProtocol: 'openai-completions',
+    });
+
+    expect(result).toEqual({ valid: true });
+    expect(mockHostApiFetch).toHaveBeenCalledWith('/api/providers/validate', {
+      method: 'POST',
+      body: JSON.stringify({
+        providerId: 'custom',
+        apiKey: 'sk-lm-test',
+        options: {
+          baseUrl: 'http://127.0.0.1:1234/v1',
+          apiProtocol: 'openai-completions',
+        },
+      }),
+    });
+  });
+});