fix(desktop): show nested hidden files/folders when toggle is enabled

[Kitenite]

Summary

• Fixes [bug] nested hidden folders do not show even when "Show Hidden Files" is enabled #1193
• When toggling "Show Hidden Files" in the file browser, only root-level hidden items appeared. Nested hidden folders/files inside expanded directories remained invisible because only the root's children cache was invalidated.
• Now invalidates the headless-tree children cache for all expanded items (via tree.getState().expandedItems), not just root, so hidden entries appear at every directory level.

Note on #1213

PR #1213 attempts to fix this by clearing childrenCache in the useFileTree hook, but that hook is not imported or used by FilesView.tsx. The active file tree uses @headless-tree/react's useTree with asyncDataLoaderFeature directly, which has its own internal cache. This PR targets the correct code path.

Test plan

• Enable "Show Hidden Files" toggle in file browser
• Expand a non-hidden folder that contains hidden subfolders/files (e.g. folder/.hidden-subfolder)
• Verify nested hidden items appear at all levels
• Toggle off — verify nested hidden items disappear at all levels
• Collapse a folder, toggle hidden files, re-expand — verify correct state

Summary by CodeRabbit

• Bug Fixes
  • Fixed an issue where toggling hidden files didn't update visibility across all expanded items in the file tree, ensuring consistent display throughout.

[coderabbitai]

📝 Walkthrough

Walkthrough

The handleToggleHiddenFiles function in FilesView.tsx has been enhanced to expand its invalidation scope. Beyond invalidating the root node's children, the function now iterates through all currently expanded nodes in the tree and invalidates their children as well, ensuring consistent hidden file visibility across the entire expanded tree structure.

Changes

Cohort / File(s)	Summary
Tree Invalidation Enhancement apps/desktop/src/renderer/screens/main/components/WorkspaceView/RightSidebar/FilesView/FilesView.tsx	Extended handleToggleHiddenFiles to invalidate children of all expanded tree nodes, not just the root, ensuring hidden file visibility updates propagate across the entire expanded tree structure.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Fix file tree staying stale when switching workspaces #1143: Introduced tree invalidation logic in FilesView.tsx's handleToggleHiddenFiles with refs-based approach; this PR extends that invalidation pattern to cover all expanded nodes.

Poem

🐰 Files hidden, files shown,
Through every branch, the change is known,
Each expanded node now understands,
The toggle spreads through all the lands! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: fixing nested hidden files/folders visibility when the toggle is enabled.
Description check	✅ Passed	The PR description is comprehensive, covering the issue fixed, the technical approach, comparison to an alternative PR, and a detailed test plan with checkboxes.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch kitenite/bug-nested-hidden-folders-do-not-show-even-when-sh

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[Kitenite]

Closing as stale: created in Jan-Mar with no recent activity. If still relevant, re-open or re-create from a fresh branch. Bulk audit 2026-05-06.