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>

docs/frontend-architecture/handbook.md

@@ -1,9 +1,10 @@
 # Odysseus frontend architecture handbook
 
-Status: F1 foundation and continuation guide, pending review. The final Notes
-reference case study belongs to the comprehensive Notes draft PR; the recipient
-handoff follows its integration. This document must evolve with reviewed internal
-checkpoints and distinguish executed work from proposals.
+Status: F1 merged in PR #6701. The complete Notes reference is implemented as an
+unpublished review diff on `refactor/notes-reference-decomposition`. Read its
+[case study](notes-case-study.md), [module inventory](notes-module-inventory.md)
+and [validation receipts](notes-validation.md). Publication and the recipient's
+post-integration reproduction remain pending.
 
 Read the [ADR](ADR-001-source-and-deployment.md), [assessment](assessment.md),
 [validation report](validation.md) and [Notes roadmap](notes-roadmap.md).
@@ -90,6 +91,13 @@ existing objects and initialization timing when extracting a stateful module.
 Do not instantiate a new store in both the legacy facade and the feature API.
 Compatibility facades only forward the same live implementation.
 
+The Notes reference uses internal read-only live views to preserve captured note
+identity across existing asynchronous completions. Its state owner supplies all
+mutations; the public index exposes operations without the store. Notes deliberately
+retains last-completion fetch ordering. Do not infer request-generation guards from
+its decomposition. Its page-owned reminders survive panel closure, and panel/editor
+listeners and observers have separate disposal scopes.
+
 Document lifecycle scopes: page, authenticated user, session, mounted panel and
 editor/draft. Name owners of subscriptions, DOM listeners, timers, observers,
 pending requests and caches. Mounting must be idempotent; disposal releases the