Fixed assets, fully featured: tags, serials, acquisition links, label sheets, the fixed asset register, and an Assets section in the viewer; fix a flaky verify

- core: asset tags (generated PREFIX-0001 or the human's own; unique ignoring case; never reused by another asset) and serial numbers (rules.md B-24); a journaled link from an asset to the entry that acquired it (posted, unreversed, debiting the cost account); fixed_asset_register(as_of), reconciled to the GL (unposted depreciation, unregistered cost)
- store: asset.tagged, asset.serial_set, asset.acquisition_linked journaled, replayed, projected (schema v9); differs_from now also compares control roles and tag history
- config: [books] asset_tag_prefix, default the company's initials without legal-form words
- import: Avery 5160/8160 label sheets with QR codes (geometry vendored from Avery, docs/spec/sources/avery-5160.md); the register as XLSX and PDF
- mcp: register_asset tags (and links) automatically; books.label_asset, books.asset_labels; asset tools take a tag; books.show asset / assets page / register report; export fixed_asset_register (json, csv, xlsx, pdf) and in the CPA package
- viewer: Assets page (register, reconciliation), asset page (identity, schedule posted vs not, entries, documents), Fixed asset register report, global search by tag/serial/description, journal text, needs-attention items
- fix: verify compared snapshot amounts as strings; a zero total summed in hash-map order could print "0" or "0.00", so agreeing books failed verify at random. Now by value (regression test)
- tests: spec-blind suites for tags, register, prefix, store, MCP; label and register PDF/XLSX tests; viewer tests

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

@@ -194,10 +194,18 @@ fn assets(ui: &mut Ui, b: &Books, shell: &mut Shell<'_>) {
         return;
     }
     let mut go = None;
-    widgets::titled_card(
+    let (register, _) = widgets::titled_card(
         ui,
         "Fixed assets",
-        |_| {},
+        |ui| {
+            widgets::link(
+                ui,
+                RichText::new(format!("Asset register {}", icon::ARROW_RIGHT))
+                    .font(theme::regular(12.5))
+                    .color(p.accent),
+            )
+            .clicked()
+        },
         |ui| {
             for a in &assets {
                 // What has actually been posted, so this ties to the balance
@@ -228,11 +236,11 @@ fn assets(ui: &mut Ui, b: &Books, shell: &mut Shell<'_>) {
                 ui.horizontal_wrapped(|ui| {
                     if widgets::link(
                         ui,
-                        RichText::new(&a.description).font(theme::semibold(13.5)),
+                        RichText::new(b.asset_label(a.id)).font(theme::semibold(13.5)),
                     )
                     .clicked()
                     {
-                        go = Some(a.cost_account);
+                        go = Some(a.id);
                     }
                     ui.label(
                         RichText::new(format!(
@@ -271,7 +279,10 @@ fn assets(ui: &mut Ui, b: &Books, shell: &mut Shell<'_>) {
         },
     );
     if let Some(id) = go {
-        shell.go(Route::Account(id));
+        shell.go(Route::Asset(id));
+    }
+    if register {
+        shell.go(Route::Assets);
     }
     ui.add_space(16.0);
 }