Attachments, statements, reconciliations, TIN vault, counterparty policy

MCP: books.link_attachment, unlink_attachment, attachments; link_to on
attach_receipt and file_document; record_statement, statements;
books.reconcile previews and, confirmed against a recorded statement,
records the reconciliation; void_reconciliation, reconciliations;
import_bank_csv links its source file; digest lists unreconciled
accounts.

TIN vault: books.set_w9 takes the TIN and the form into the encrypted
vault (last four in the books); books.vendor_1099 include_tins and
save_csv_to for the CPA's copy; books.get_w9; books.purge_tin. A leak
test scans every tool output, the journal, the database, and the blobs.

[books] parties = off | suggest | require (default suggest): every
preview names the entry's party or suggests likely ones; require refuses
to post until it names one or is marked as having none (entry.no_party).

Viewer: documents on every subject page; statements and reconciliation
history per account; reconciliation pages; reconcile and
no-counterparty attention items; party money by period (paid out,
received in, net, what for, by month); Needs attention gets its own
full-width section.

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

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

@@ -180,6 +180,32 @@ pub fn show(ui: &mut Ui, b: &Books, shell: &mut Shell<'_>) {
                 );
             }
         });
+        let mut subjects = vec![ledger_store::Subject::Company];
+        subjects.extend(
+            b.ledger
+                .list_periods()
+                .iter()
+                .map(|x| ledger_store::Subject::Period(x.id)),
+        );
+        subjects.extend(
+            b.ledger
+                .schedules()
+                .map(|x| ledger_store::Subject::Schedule(x.id)),
+        );
+        let mut go = None;
+        super::documents::documents_card_with(
+            ui,
+            b,
+            "Company documents",
+            &subjects,
+            &[ledger_store::Subject::Company],
+            "No documents linked to the company, its periods, or its schedules yet (formation papers, the operating agreement, tax filings).",
+            &mut go,
+        );
+        ui.add_space(16.0);
+        if let Some(r) = go {
+            shell.go(r);
+        }
         assets(ui, b, shell);
         schedules(ui, b);
         recurring(ui, b);