* feat: hide dotfiles in file explorer
* refactor: rename to "hidden files" and read flag from store
Rename the explorer dotfile toggle to show-semantics "hidden files"
so copy and code share one cross-platform vocabulary, and stop
prop-drilling the flag now that it lives in the panel store.
- explorerShowHiddenFiles (default true) replaces explorerHideDotFiles;
i18n keys + translations switched from "dotfiles" to "hidden files"
- imperative helpers read usePanelStore.getState() instead of taking
the flag as a parameter; flag stays threaded only through the
reactive tree-row render path
- drop dead usePanelState exposure; collapse migration double-guard
* fix: address Greptile review on hidden-file path matching
- isHiddenExplorerPath no longer treats ".." segments as hidden
(only "." was exempt before); add tests for ".." and "../sibling"
- assert the showHiddenFiles i18n key alongside hideHiddenFiles
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Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>
