feat(explorer): common hotkeys in the Explorer and the project tree (#330)

[Maxaubert]

The owner, 2026-10-07: "add common hotkeys to the explorer and project so that for example ctrl + A selects all".

One pure mapping, lib/listKeys.ts (unit-tested), for the Explorer's list and the project tree, so the same chord does the same thing on both. Every key is behind the typing guard, comes from the rows only, and is CLAIMED, because the player, the PDF and the archive panel listen on the window.

Keys

Key	Explorer list	Project tree
Ctrl+A	marks every row	marks every row shown (already there, kept)
Ctrl+Shift+A, Esc	clears the marks (Esc only when something is marked and nothing nearer owns Escape)	same
Shift+Up/Down/Home/End	marks the run from the anchor, opens and plays nothing (#263)	same
Ctrl+Up/Down/Home/End	moves the keyboard, not the marks	same
Ctrl+Space	marks or unmarks the row the keyboard is on	same
Ctrl+Shift+N	"New folder" in the folder shown, then its rename	in the folder row, or beside the file row, then its rename
Ctrl+D, Shift+Del	Delete: the question, then the Recycle Bin (the marks decide)	same
Alt+Up	up a folder (already there)	the parent row
Alt+Left/Right	back / forward (already there)	claimed, does nothing
F3	the folder search	the tree filter
Alt+Enter	Prism's Properties	Prism's Properties
Ctrl+Shift+C	the full paths as text, one per line	same
Ctrl+Enter	a folder in a new Explorer tab (a file: nothing)	same
a letter	(the list's own type-to-jump, unchanged)	type-to-jump, taken only on a match, letters only

Not mapped: Ctrl+Left/Right (Left and Right are not navigation keys, 2026-09-01). Inside a zip, Ctrl+D, Ctrl+Shift+N and Alt+Enter do nothing.

The four decisions (owner, in the session)

1. Shift+Del is NOT a permanent delete. It is Delete: the question, then the Recycle Bin. "Nothing is destroyed" still holds.
2. Type-to-jump in the tree is taken only on a match; otherwise the letter still reaches the viewer (a film's k/j/l/m, a picture's f).
3. F3: the folder search / tree filter from the rows; the PDF keeps F3 only with the focus in it.
4. Alt+Enter opens Prism's own Properties, not Windows'.

A rule change: new folder

CLAUDE.md said "new folder" was a fresh decision, not a natural next step. The owner said yes to Ctrl+Shift+N: main names it "New folder", "(2)" and on, checks the place, never inside a zip; the rename starts at once; undo kind mkdir bins it only while it is still empty, and the rename that follows folds into it, so one Ctrl+Z takes it away.

Review fixes (second commit)

• Alt+Up in the tree no longer opens or plays the row above on its way to the parent.
• A folder row no longer looks selected when the keyboard sits on it apart from the marks.
• Delete, Ctrl+D and Shift+Del take the marks in the tree too, never a row the Ctrl keys or Esc left unlit (the Explorer's rule).
• Esc yields to a nearer closer (the sidebar peek, the PDF find bar, anything with data-owns-escape).
• Type-to-jump takes letters only: digits and . , are the player's.
• After a rename (Ctrl+Shift+N always ends in one) the keyboard follows the row to its new name.
• AZERTY gets no extra binding from the physical key.
• Shift+Del is Delete from the viewer too.

Rejected: an e2e for the archive panel's Ctrl+A stepping aside. ArchiveView renders only on the phone page now (#300), where there is no tree or Explorer list, so the guard cannot be reached on the desktop; it stays as a defensive line.

Tests

• npm run typecheck, npm run lint (0 errors), npm test: 2604 passed.
• e2e, locally: hotkeys (new; every key on both surfaces, a paused film under every claimed chord, a zip, the PDF, Esc yielding, the bin keys off the marks), sidebarPeek (Esc on a row puts the peek away), and treeNav, selection, markTint, rightClickSelect, treeVerbs, deleteAgain, arrowKeys, deleteLast, searchNav: all passed.

Version 0.97.0. Unsigned, as every release until the SignPath enrolment.

Closes #330

🤖 Generated with Claude Code

https://claude.ai/code/session_01FHHaWKR4M5QtW7Wecyuk4t