Parties, attachment links, statements, reconciliations (store), TIN vault crate

Parties: one directory for vendors, contractors, customers, employees,
members, platforms, agencies, banks, landlords (ledger-core parties.rs).
W-9/W-4 facts without the number (last four only; any nine-digit run in a
party field is refused, Treas. Reg. 301.6109-4). Vendor and customer
records link to parties on replay; core tags every bill, invoice, payment,
and reversal with its counterparty. Journal events party.*,
entry.party_set; payroll lines name the employee party.

MCP: books.add_party, update_party, set_party_roles, set_w9, set_w4,
parties, party, set_entry_party; draft_entry party; run_payroll employee;
show party. Viewer: Parties directory and party pages, search, journal
text, W-9 attention, demo data.

One definition of a party's money (ledger_core::parties::activity) for
MCP and viewer. 1099 amounts count payments from cash and financing
accounts (a member paying for the company counts; a card doesn't; a
prepayment counts when made): vendor_1099_report_with, B-19.

Store: attachment links to any subject, statements, reconciliations
(schema v11), with replay and projection. ledger-vault: encrypted TIN and
W-9 records (ChaCha20-Poly1305, key file outside the books).

Spec-blind tests for parties (core, store, MCP, viewer) and attachments.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GWVo7x3UHw5kwCUaWxiejX

crates/ledger-gui/src/pages/assets.rs

@@ -281,7 +281,7 @@ pub fn status_text(disposed: Option<(NaiveDate, Decimal)>) -> String {
     }
 }
 
-fn notice_box(ui: &mut Ui, n: &Notice) {
+pub(crate) fn notice_box(ui: &mut Ui, n: &Notice) {
     let p = pal(ui.ctx());
     let (fg, bg) = if n.problem {
         (p.warning, p.warning_soft)
@@ -310,7 +310,7 @@ fn notice_box(ui: &mut Ui, n: &Notice) {
 /// One painted table row: `cells` are (text, width, right-aligned,
 /// color); the cell whose width is 0 takes what's left. A second line
 /// (`sub`) goes under the flexible cell.
-fn row(
+pub(crate) fn row(
     ui: &mut Ui,
     w: f32,
     cells: &[(String, f32, bool, Color32)],
@@ -1345,7 +1345,7 @@ fn tax_card(ui: &mut Ui, a: &Asset) {
 }
 
 /// A two-column grid of facts; `add` gets the label painter.
-fn facts(ui: &mut Ui, add: impl FnOnce(&mut Ui, &dyn Fn(&mut Ui, &str))) {
+pub(crate) fn facts(ui: &mut Ui, add: impl FnOnce(&mut Ui, &dyn Fn(&mut Ui, &str))) {
     let p = pal(ui.ctx());
     egui::Grid::new(ui.next_auto_id())
         .num_columns(2)