fix(test): wait for directory load before testing manual input mode

The FolderPicker manual input tests waited only for the pencil button
to render, not for the async loadDirs to resolve. On Ubuntu CI the
browsePath was still empty when clicked, causing toHaveValue to fail.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: edwinhu

web/src/components/FolderPicker.test.tsx

@@ -330,8 +330,9 @@ describe("FolderPicker", () => {
     // Validates the pencil icon opens a text input, and Enter selects the typed path
     const { onSelect } = setup();
 
+    // Wait for directories to load so browsePath is populated
     await waitFor(() => {
-      expect(screen.getByLabelText("Type path manually")).toBeInTheDocument();
+      expect(screen.getByText("src")).toBeInTheDocument();
     });
 
     fireEvent.click(screen.getByLabelText("Type path manually"));
@@ -351,8 +352,9 @@ describe("FolderPicker", () => {
     // Validates Escape in manual input mode exits the input, not the dialog
     const { onClose } = setup();
 
+    // Wait for directories to load so the component is fully initialized
     await waitFor(() => {
-      expect(screen.getByLabelText("Type path manually")).toBeInTheDocument();
+      expect(screen.getByText("src")).toBeInTheDocument();
     });
 
     fireEvent.click(screen.getByLabelText("Type path manually"));