…ting, iCloud, window polish

Editor correctness:
- Markup-mode ⌘Z could walk back into the PREVIOUS note (the one reused
  CodeMirror instance records replace() in its history, and addToHistory:false
  only remaps old events). A pristine CM state snapshotted at mount now
  templates a fresh per-note state on every swap (editor/markupHistory.ts;
  @codemirror/state+commands become direct deps — single deduped copies).
- Wiki tooltip/suggest popups no longer pop on note open (stuck top-left):
  gated through swappingRef — which now also starts TRUE at mount, since a
  fresh window never runs the swap path — plus a detached-anchor guard, and a
  caret at a link's LEFT edge no longer counts as inside it.
- WKWebView occasionally left a stale paint of the caret line (a "doubled"
  ghost line, few px offset): .editor-pane gets its own compositing layer.

Live URLs (fuzzy off everywhere — .md is a real TLD; a Notes.md mention must
never linkify or be rewritten on disk):
- md.linkify in the WYSIWYG editor (bare URLs normalize once to <url> on save),
  mirrored in the preview transform; preview link clicks route through
  openExternalUrl instead of navigating the surface.
- Typed URLs linkify on the trailing space via an InputRule that sets the
  editor's raw-link attr — typed links round-trip as the bare url.

iCloud Drive: the bulk walks skip dataless (SF_DATALESS) file content instead
of blocking on download-on-demand — a non-downloaded folder lists instantly
with empty previews; an explicit note open still materializes the file.

Windows & workspace UX:
- Note windows cascade centered on the opener's monitor (opener+28px glued
  them onto the main window — read as a doubled editor).
- "Open Folder…" honors ⌘ (switcher ⌘↵/⌘-click, orb menu ⌘-click): picks a
  folder into its OWN window via pickFolderForNewWindow (registry entry
  persisted before the window spawns).
- Read-only preview shows a floating chip (hover: "Exit preview"; click exits).
- A folder scope chip names the filter when the rail is closed (click opens
  the rail, ✕ back to All Notes without switching notes).
- Typing a search while the sidebar is collapsed auto-peeks the list without
  stealing focus from the box; clearing or committing tucks it away.

Docs: CLAUDE.md + README caught up (per-note windows, ⌘0, live URLs, chips).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…edUrls

Two items from the note-windows branch review:

- NotePreview's click handler now vets target.getAttribute('href') instead
  of target.href, which resolves relative paths and footnote # anchors
  against the document base into openable http(s) URLs — so a relative
  [x](foo) opened a junk tab instead of being swallowed as the doc comment
  promised. Test added.
- linkifyTypedUrls gets the unit test every other new module had: the
  regex boundaries (^/\s, explicit scheme only, whitespace terminator) and
  the from = end - url.length mark math (URL marked exactly, raw-link attr
  set, typed space outside the inclusive:false mark), plus the
  link/code/wiki_link skip paths — driven through the same stub-builder +
  inputRules harness as the wikiLinkExtension test.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…eak, linkify/iCloud edges

Second xhigh /code-review pass over the note-windows branch (15 verified findings)
plus field-test follow-ups.

Correctness:
- useNotes: a note window's in-memory `active` pointer no longer leaks to the shared
  sidecar — writeMetadataNow substitutes the live on-disk value at the write boundary,
  so pins/appearance/navigation/close can't hijack the main window's restore pointer.
  onCloseRequested keeps a window open when its flush hit an unresolved conflict
  (instead of destroying it and dropping the edit).
- ⌘0 (Window ▸ Main Window): move the menu:main-window listener from workspace-keyed
  Workspace (remounts on every ⌃R switch → duplicate listeners → ⌘0 opened several
  workspaces at once) to App (one stable listener per window). window_note_renamed
  re-keys note-window focus-if-open on cross-window rename/move; all focus paths
  unminimize before show/focus; openInNewWindow fails loudly when the workspace left
  the registry; windowNote clears on the first in-place switch.
- linkifyTypedUrls: bail when the typed whitespace replaces a selection (offsets would
  mis-mark and leave the selection undeleted); trim trailing punctuation from the URL.
- useNotesStorage: skipProbe excludes the main window (its assignment is stale after a
  webview reload) and pickFolderForNewWindow probes the folder before touching the
  registry.
- useCorpus: re-read an iCloud-dataless file once its list preview materializes
  (download leaves mtime unchanged, so the updatedAt-keyed refresh missed it).
- NotePreview: middle-click (auxclick) also routes through the vetted external opener.
- Search Enter with the sidebar collapsed returns to the editor, not a hidden list.

Tooling/docs:
- eslint.config.js + .prettierignore: ignore stray root .vite/ cache and .claude/
  worktrees (gitignored full-repo copies that made `eslint .` hang / report phantoms).
- CLAUDE.md/README caught up; completed backlog items removed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

From an external review of the note-windows branch:

- M3 (blocking): unify the "open in new window" chord. Hoist isOpenInNewWindowChord
  to shortcuts.ts and use it in TopBar (recents + Open Folder…) and the ⌃R switcher,
  which previously gated on metaKey alone — so Ctrl-click/Ctrl↵ now works off macOS
  (Windows/Linux), matching the note-list rows.
- M1: notify the shell when a note is trashed or deleted (window_note_removed), the
  delete-path mirror of window_note_renamed — so a note window left showing an orphan
  stops answering per-note focus-if-open for a dead id. Pure core unit-tested.
- M2: cite the SDK header + verified macOS version for the hand-coded SF_DATALESS.
- N1/N3: document the notifyShellNoteRenamed ordering and that writeMetadataNow's
  diskActiveRef fallback is a load-time snapshot (best-effort, not authoritative).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>