feat: Add test coverage for executeSafePromise error handling paths

packages/utils/test/executeSafePromise.test.ts

@@ -9,4 +9,79 @@ describe('executeSafePromise', () => {
         })
         expect(result).toBe(123)
     })
+
+    describe('error handling', () => {
+        describe('Node/Electron environment', () => {
+            const originalProcessExit = process.exit
+
+            beforeEach(() => {
+                // Mock process.exit to prevent actual exit during tests
+                process.exit = jest.fn() as any
+            })
+
+            afterEach(() => {
+                // Restore original process.exit
+                process.exit = originalProcessExit
+            })
+
+            it('should call process.exit(1) when promise rejects', async () => {
+                const testError = new Error('Test error')
+
+                await executeSafePromise(async () => {
+                    throw testError
+                })
+
+                expect(process.exit).toHaveBeenCalledWith(1)
+            })
+
+            it('should log fatal error before exiting', async () => {
+                // We can't easily test the logger output without mocking it,
+                // but we can verify process.exit is called
+                const testError = new Error('Fatal test error')
+
+                await executeSafePromise(async () => {
+                    throw testError
+                })
+
+                expect(process.exit).toHaveBeenCalled()
+            })
+        })
+
+        describe('browser environment', () => {
+            const originalProcess = global.process
+
+            beforeEach(() => {
+                // Simulate browser environment by removing process.exit
+                // @ts-expect-error - intentionally deleting for test
+                delete (global as any).process.exit
+            })
+
+            afterEach(() => {
+                // Restore process
+                global.process = originalProcess
+            })
+
+            it('should throw error with proper error chaining when promise rejects', async () => {
+                const testError = new Error('Test error in browser')
+
+                await expect(executeSafePromise(async () => {
+                    throw testError
+                })).rejects.toThrow('executeSafePromise: Assertion failure!')
+            })
+
+            it('should chain the original error as cause', async () => {
+                const originalError = new Error('Original error')
+
+                try {
+                    await executeSafePromise(async () => {
+                        throw originalError
+                    })
+                    fail('Should have thrown an error')
+                } catch (err: any) {
+                    expect(err.message).toBe('executeSafePromise: Assertion failure!')
+                    expect(err.cause).toBe(originalError)
+                }
+            })
+        })
+    })
 })