Lazyplanner v1.4.0

v1.4.0 — SELECT mode: multi-select & bulk operations

LazyPlanner gains a vim-style multi-select layer. Press V to anchor a
selection, extend it with the ordinary movement keys, then apply one bulk
action to the whole range.

New

SELECT mode (V)

• Works in three contexts: the task tree, the un-drilled calendar
  (a range of days), and a drilled day's item list.
• The range is a contiguous anchor→cursor span, extended with normal motion:
  hjkl/arrows, gg/G, f/b, and vim counts (10j).
• The status bar shows a SELECT badge and a live N selected count; the
  selected range is highlighted in the view (reverse-video rows in the tree,
  outlined day boxes on the calendar).
• Modes nest vim-style: DRILL → SELECT → GRAB, with each Esc unwinding
  exactly one level.

Bulk operations (one keystroke, one undo step)

• Space — complete every selected task (children before parents, so a
  folder and its last open subtask can be finished in one pass; recurring
  todos advance one occurrence, exactly like single-item Space).
• d — delete the selection, with a single confirmation naming the real
  resource count (a selected subtask of a selected parent is absorbed, never
  counted or deleted twice).
• y / Y — cut / copy multiple subtrees to the clipboard (task tree
  only), then p/P pastes them together — including across lists.
• m — bulk grab: shift every selected item by whole days (h/l) or
  weeks (j/k) as one uniform date-shift. Esc returns to SELECT with the
  range intact so a grab can be retried.
• Every bulk action is all-or-nothing: a mid-batch failure rolls back
  cleanly, and a full success is a single u undo step.
• Items an action can't apply to (read-only calendars, recurring events,
  undated tasks, folders with open subtasks, already-done tasks) are skipped
  and counted — the flash reports exactly what was skipped and why, and
  confirmation counts always match what is actually acted on.

Fixed

• The always-visible help bar now shows the active grab's controls and
  granularity for the whole grab (single grab: ±hour/±day per context;
  bulk grab: ±day/±week) instead of the ordinary controls line — or, mid
  bulk-grab, a stale SELECT · hjkl extend line that no longer matched what
  the keys did.
• A malformed RELATED-TO parent cycle in hand-edited/foreign .ics data
  could hang the UI during a bulk delete's ancestor walk — now cycle-guarded,
  consistent with the "malformed iCalendar is never fatal" invariant.
• V pressed while an overview panel (Calendars/Tasks) is focused flashes a
  hint instead of silently anchoring a selection that motion could never
  extend.
• A bare 0 in SELECT no longer leaks through to the week/day hour-zoom
  reset (a 0 continuing a count, e.g. 10j, still works); modified motion
  keys (Ctrl-arrows) can no longer sneak a pane resize in mid-select.

Docs

• README.md keybindings table gains V (and a previously missing m grab
  row); the ?/:help cheat sheet gains a Select section.

Full gate green (go test ./..., go vet, staticcheck, race + display-stress suites) on every commit.

Full Changelog: v1.3.0...v1.4.0