Replace the multi-tab model with single-note navigation. One note is
open at a time; clicking any note (sidebar, wikilink, relationship)
replaces the current note in the editor. Back/Forward history still
works via Cmd+[/].
Removed: TabBar component, useClosedTabHistory, tab reorder/close/
reopen logic, Cmd+W/Cmd+Shift+T shortcuts, Close Tab and Reopen
Closed Tab menu items, tabLayout utility, and all related tests.
Simplified: useTabManagement (single-note), useAppNavigation (no tab
lookup), useKeyboardNavigation (note nav only), useNoteCreation (no
close-tab cleanup), useDeleteActions (deselect instead of close tab),
Editor (no TabBar render), Rust menu (removed 2 menu items).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Remove owner, cadence, created_at, and created_time as hardcoded fields from
the Frontmatter struct — they don't drive app logic and belong in generic
properties. Owner and cadence values now flow through to the properties map
(including single-element array unwrapping). Creation date is sourced from
filesystem metadata (birthtime on macOS) instead of frontmatter.
Also fixes title extraction: add H1 heading extraction to extract_title()
(priority: frontmatter title → H1 → filename slug). Previously titles fell
back directly to filename when no frontmatter title was set.
StringOrList is retained for scalar Frontmatter fields as a defensive measure:
YAML values can arrive as single-element arrays (e.g. Status: [Active]) which
would cause entire deserialization to fail without it.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
39 tests for useNoteCreation covering creation, daily notes, templates,
optimistic revert, and unsaved cleanup. 12 tests for useNoteRename
covering rename operations, toast messages, and error handling.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
