Projects: classes as entities, and the sidebar fits short windows

A project is a class with facts (description, status, kind, party,
dates, links, notes) in one project.set event behind the format
feature projects. Four tools (books.add_project, update_project,
projects, project); documents and decisions link to projects; B-37:
on-spec costs are expensed as incurred, repayment is revenue, and the
unrecovered cost is never below zero (Kani). Viewer: a Projects list
and a project page with its figures, by month and by account. The
sidebar measures its footer instead of reserving a fixed 172 px.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj

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

@@ -385,6 +385,16 @@ pub(crate) fn row(
             Sense::hover()
         },
     );
+    if click {
+        // Named by its main cell, for assistive tech (and the tests).
+        let name = cells
+            .iter()
+            .find(|c| c.1 == 0.0)
+            .or(cells.first())
+            .map(|c| c.0.clone())
+            .unwrap_or_default();
+        resp.widget_info(|| egui::WidgetInfo::labeled(egui::WidgetType::Button, true, &name));
+    }
     if click && resp.hovered() {
         ui.painter().rect_filled(r, CornerRadius::same(4), p.hover);
         ui.ctx().set_cursor_icon(egui::CursorIcon::PointingHand);