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/entry.rs

@@ -107,6 +107,19 @@ pub fn detail(ui: &mut Ui, b: &Books, e: &EntryInfo, shell: &mut Shell<'_>) {
                     shell.go(Route::Party(party.id));
                 }
             }
+            if e.party_id.is_none()
+                && let Some(why) = b.ledger.entry_no_party(e.id)
+            {
+                ui.add_space(4.0);
+                ui.add(
+                    egui::Label::new(
+                        RichText::new(format!("{} No counterparty: {why}", icon::USER_MINUS))
+                            .color(p.muted),
+                    )
+                    .wrap(),
+                )
+                .on_hover_text("Marked as having no counterparty (entry.no_party)");
+            }
             if let Some(&asset) = b.entry_assets.get(&e.id) {
                 ui.add_space(4.0);
                 if widgets::link(
@@ -268,18 +281,25 @@ pub fn detail(ui: &mut Ui, b: &Books, e: &EntryInfo, shell: &mut Shell<'_>) {
                 });
             ui.add_space(18.0);
 
-            // Receipts.
+            // Receipts and documents: filed on it, linked to it, or linked
+            // to the invoice, bill, or payroll run it records; a withdrawn
+            // receipt filed on it stays, marked.
+            let subjects = b.entry_subjects(e.id);
             let all_for_entry: Vec<&Attachment> = b
                 .attachments
                 .iter()
-                .filter(|a| a.entry_id == Some(e.id))
+                .filter(|a| {
+                    a.entry_id == Some(e.id)
+                        || (a.withdrawn_at.is_none()
+                            && b.links_of(a.id).iter().any(|s| subjects.contains(s)))
+                })
                 .collect();
             section(
                 ui,
                 if all_for_entry.len() == 1 {
                     "Receipt"
                 } else {
-                    "Receipts"
+                    "Receipts and documents"
                 },
             );
             if all_for_entry.is_empty() {
@@ -295,6 +315,29 @@ pub fn detail(ui: &mut Ui, b: &Books, e: &EntryInfo, shell: &mut Shell<'_>) {
                 }));
             }
             for a in all_for_entry {
+                let elsewhere: Vec<ledger_store::Subject> = b
+                    .links_of(a.id)
+                    .iter()
+                    .copied()
+                    .filter(|s| *s != ledger_store::Subject::Entry(e.id))
+                    .collect();
+                if !elsewhere.is_empty() {
+                    let mut go = None;
+                    ui.horizontal_wrapped(|ui| {
+                        ui.spacing_mut().item_spacing = vec2(4.0, 4.0);
+                        ui.label(
+                            RichText::new("Linked to")
+                                .font(theme::regular(11.5))
+                                .color(p.faint),
+                        );
+                        for s in elsewhere {
+                            super::documents::subject_chip(ui, b, s, &mut go);
+                        }
+                    });
+                    if let Some(r) = go {
+                        shell.go(r);
+                    }
+                }
                 attachment_view(ui, b, a, shell, true);
                 ui.add_space(12.0);
             }