test: reset windows process-rows snapshot between agent-foreground cases

The new module-level Windows rows reader caches for 500ms with real
Date.now(), so one case's mocked process table was served to the next
case's assertions (7 CI failures in agent-foreground-process.test.ts).
Mirror the suite's existing POSIX resetProcessTableSnapshotForTests()
with the Windows reset in beforeEach.

Co-authored-by: Orca <help@stably.ai>

src/main/providers/agent-foreground-process.test.ts

@@ -10,6 +10,7 @@ vi.mock('child_process', () => ({
 
 import { resetProcessTableSnapshotForTests } from '../../shared/process-table-snapshot'
 import { resolveAgentForegroundProcess } from './agent-foreground-process'
+import { resetWindowsProcessRowsSnapshotForTests } from './windows-foreground-process-rows'
 
 // Why: the module wraps execFile with promisify, so the mock must honor the
 // Node callback contract — invoke the last arg with (err, { stdout, stderr }).
@@ -73,6 +74,9 @@ describe('resolveAgentForegroundProcess', () => {
   beforeEach(() => {
     execFileMock.mockReset()
     resetProcessTableSnapshotForTests()
+    // Why: the Windows rows reader caches across calls (500ms TTL), so each
+    // case's execFile mock must not be answered by the previous case's rows.
+    resetWindowsProcessRowsSnapshotForTests()
     platform = Object.getOwnPropertyDescriptor(process, 'platform')
     Object.defineProperty(process, 'platform', { value: 'darwin' })
   })