[tresat]

Each file list in the right column gets a button that switches it between a flat, path-sorted list and a folder tree: the Uncommitted and Committed sections of Changed Files, and All Files.

Changed Files still starts as a list, and All Files still starts as a tree, so nothing changes until you click. All Files gains a list view it didn't have before. Each list remembers its choice per client in localStorage, the same way panels remember being collapsed.

Changed Files: list (default)	Changed Files: tree

All Files in list view, filtered. As in the tree, files changed on the branch sort first while filtering:

Implementation

• All Files' buildTree / sortChildren and its TreeBranch / DirRow renderer move into src/renderer/file-tree.ts and components/FileTree.tsx, and both panels use them, so the trees look and behave the same. Changed-file trees start expanded; All Files still starts collapsed.
• Folders are keyed with a trailing /, so a file and a folder with the same name (a deleted foo plus a new foo/bar) both show.
• Staged renames (old -> new from git status --porcelain) are placed and named by their destination. destOf moves from worktree.ts to src/shared/git-paths.ts so main and renderer share it.
• All Files' list view renders at most 1,000 rows, because nothing in that panel is virtualized. Rows are memoized with ref-stabilized callbacks, and the changed-files map only feeds the list while filtering. That way neither changed-files refreshes nor App re-renders redraw the list.

Testing

• npm run typecheck, npx electron-vite build, npx vitest run: 1,844 passing, including the new file-tree.test.ts.
• Checked by hand in the headless web client:
  • both views in all three lists, and the saved choice
  • a collapsed folder staying collapsed through a refresh
  • staged renames, including one that moves a file to the repo root
  • a file and a folder sharing a name
  • All Files list filtering, and opening a file / using the @ button from a row

Known issues, not fixed here

• Clicking a staged rename opens a diff tab that says "No changes", because the diff opener gets the raw old -> new path. The list view did this before this PR too.
• Paths that git status --porcelain quotes (spaces, non-ASCII) still parse wrong. Also not new.

Screenshots are from the headless web client, using this PR's own branch as demo data.