fix: isolate cleanup from key retrieval, add deleteSetting test

src/main/ipc/chatHandlers.ts

@@ -62,11 +62,15 @@ async function getOpenCodeManager(): Promise<OpenCodeManager> {
     // Load API key from encrypted storage
     const keyStore = getSecureKeyStore();
     openCodeManagerInitPromise = (async () => {
+      // Clean up old plain-text key from settings (pre-keychain storage)
       try {
-        // Clean up old plain-text key from settings (pre-keychain storage)
         await keyStore.cleanupPlainTextKey('opencode_api_key');
+      } catch {
+        // Best-effort cleanup; not critical
+      }
 
-        // Load API key from encrypted storage
+      // Load API key from encrypted storage
+      try {
         const key = await keyStore.retrieve('opencode_api_key');
         if (key) {
           openCodeManager!.setApiKey(key);

tests/engine/ChatEngine.test.ts

@@ -776,6 +776,23 @@ describe('ChatEngine', () => {
     });
   });
 
+  describe('deleteSetting', () => {
+    it('should delete a setting by key', async () => {
+      let capturedPredicate: any;
+      vi.mocked(mockLocalDb.delete).mockImplementation(() => ({
+        where: vi.fn((predicate) => {
+          capturedPredicate = predicate;
+          return Promise.resolve();
+        }),
+      } as any));
+
+      await chatEngine.deleteSetting('opencode_api_key');
+
+      expect(mockLocalDb.delete).toHaveBeenCalled();
+      expect(capturedPredicate).toBeDefined();
+    });
+  });
+
   describe('setSelectedModel', () => {
     it('should save selected model', async () => {
       let capturedValues: any;

tests/ipc/chatHandlersKeychain.test.ts

@@ -240,7 +240,7 @@ describe('chatHandlers keychain integration', () => {
     expect(manager.setApiKey).not.toHaveBeenCalled();
   });
 
-  it('still initializes when cleanupPlainTextKey() throws on init', async () => {
+  it('still initializes and loads key when cleanupPlainTextKey() throws on init', async () => {
     secureKeyStoreCleanupError = new Error('delete failed');
 
     const mod = await import('../../src/main/ipc/chatHandlers');
@@ -252,6 +252,10 @@ describe('chatHandlers keychain integration', () => {
     const result = await handler!(undefined);
     // Init should complete even if cleanup fails
     expect(result.ready).toBe(true);
+
+    // The encrypted key should still be loaded despite cleanup failure
+    const manager = openCodeManagerInstances[0];
+    expect(manager.setApiKey).toHaveBeenCalledWith('encrypted-stored-key');
   });
 
   it('returns error when store() throws on chat:setApiKey', async () => {