refactor(notes): decompose Notes into feature-owned modules (#6713)

* refactor(notes): decompose Notes into feature-owned modules

* fix(notes): avoid HTML interpolation in reminder picker

* docs(notes): drop checkpoint archives, session logs and publication drafts

The N0-N6 tarballs and raw pytest/node logs are not read by any script or
test, and the logs carry absolute home-directory paths. Once squashed into
dev they would stay in history for good. notes-pr.md and notes-issue.md
were the drafts used to open #6712 and #6713, not documentation.

notes-validation.md keeps the counts, the checkpoint hashes and
implementation.sha256 as the record; local interpreter paths and the local
Docker image name are replaced with portable placeholders.

* fix(notes): keep the state store raw and stop masonry re-observing after close

- state: writes built from views (filter, spread, splice) stored nested
  read-only views in the store, so structuredClone on a stored note threw
  DataCloneError. Store writes now unwrap nested views.
- layout: a save that resolves after closePanel re-renders the leaving pane
  and re-created the masonry ResizeObserver that teardown had disposed.
  Skip creating it once Notes is closed.
- index.js: drop 30 imported or declared names that were never used and
  group the imports at the top. Import order is unchanged.
- Revert unrelated punctuation edits in .gitattributes and keep the header
  comment and docstring first in compare/vote.js and
  test_notes_dom_xss_helpers.py.

Both fixes have a node test that fails on the previous head.

* test(notes): make script rejection assertion case-insensitive

Address CodeQL js/bad-tag-filter alert #1150 in test-only assertion and refresh Notes evidence manifest checksum.

---------

Co-authored-by: Léo <leograndcontact@gmail.com>

static/js/features/notes/domain/noteRules.js

@@ -0,0 +1,87 @@
+/** Pure Notes completion, tags, reminder and serialization rules. */
+import { _hasTimeComponent } from './recurrence.js';
+export function _isCalendarReminderNote(n) {
+  return n && n.source === 'calendar' && n.label === 'calendar';
+}
+
+export function _hasActiveReminder(n, clock) {
+  if (!n || n.archived || _isNoteFullyDone(n)) return false;
+  if (!n.due_date) return false;
+  const t = new Date(n.due_date).getTime();
+  return !isNaN(t) && t <= clock.now();
+}
+
+export function _isNoteFullyDone(note) {
+  if (_hasItems(note) && Array.isArray(note.items) && note.items.length > 0) {
+    return note.items.every(it => it.done);
+  }
+  return false;
+}
+
+export function _hasItems(note) {
+  return note && (note.note_type === 'todo' || note.note_type === 'goal' || note.note_type === 'checklist');
+}
+
+export function _goalProgress(note) {
+  if (!Array.isArray(note?.items) || note.items.length === 0) return '';
+  const done = note.items.filter(it => it.done).length;
+  return ` ${done}/${note.items.length}`;
+}
+
+export function _nextGoalStep(note) {
+  if (!Array.isArray(note?.items)) return null;
+  for (let i = 0; i < note.items.length; i++) {
+    if (!note.items[i].done) return { idx: i, item: note.items[i] };
+  }
+  return null;
+}
+
+export function _noteTags(n) {
+  const tags = [];
+  if (n?.label) tags.push(...n.label.trim().split(/\s+/).filter(Boolean));
+  if (n?.due_date && _hasTimeComponent(n.due_date)) tags.push('reminder');
+  return [...new Set(tags.map(t => t.replace(/^#+/, '').trim()).filter(Boolean))];
+}
+
+export function _visibleNoteTags(n) {
+  return _noteTags(n).filter(t => t !== 'reminder');
+}
+
+export function _isPastReminder(n, clock) {
+  if (!n?.due_date || !_hasTimeComponent(n.due_date)) return false;
+  const due = new Date(n.due_date).getTime();
+  return !isNaN(due) && due <= clock.now();
+}
+
+export function _serializeNoteForCopy(note) {
+  const lines = [];
+  if (note.title) lines.push(note.title);
+  if (note.content) lines.push(note.content);
+  if (Array.isArray(note.items) && note.items.length) {
+    if (lines.length) lines.push('');
+    for (const it of note.items) {
+      if (!it || !(it.text || '').trim()) continue;
+      lines.push(`- [${it.done ? 'x' : ' '}] ${(it.text || '').trim()}`);
+    }
+  }
+  return lines.join('\n').trim();
+}
+
+export function _noteToAgentPrompt(note) {
+  const parts = [];
+  if ((note.title || '').trim()) parts.push(note.title.trim());
+  if ((note.content || '').trim()) parts.push(note.content.trim());
+  if (Array.isArray(note.items)) {
+    note.items.filter(it => !it.done && (it.text || '').trim())
+      .forEach(it => parts.push('- ' + it.text.trim()));
+  }
+  const body = parts.join('\n');
+  return body ? `Help me get this done:\n\n${body}\n\nThe source note is read-only. Do not edit, replace, or update it.` : '';
+}
+
+export function _standardVisualVariant(note) {
+  const source = String(note?.id || note?.title || note?.created_at || 'standard-note');
+  let hash = 0;
+  for (let i = 0; i < source.length; i++) hash = ((hash << 5) - hash + source.charCodeAt(i)) | 0;
+  return Math.abs(hash) % 5;
+}