gui: Save PDF on every report; short and narrow windows hold up

Reports get a Save PDF button beside Copy for a spreadsheet. It typesets
the report as it's set up on screen (range, months/quarters/years,
comparison) through ledger-import's Typst statement template, the same
one the CPA package uses, in the background, writes it to the Downloads
folder (never the books: the viewer stays read-only), and opens it.

- ledger-import: Statement.percent_from marks percentage columns
  (comparison %, % of income), typeset as 12.5% with no dollar sign;
  wide statements turn the page, and past seven columns set smaller so
  a year of months fits; statement() is public for other callers.
- Compared columns that read the same (Jan 1 - Oct 12 vs a year
  earlier) now say which year, on screen and on paper.
- Short windows: the sidebar's and rail's links scroll above the status
  box instead of under it. The search palette fits the window.
- A test typesets every table-backed report from the demo books,
  plain, by month, and compared (PDF_DIR keeps the files).

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

crates/ledger-import/templates/statement.typ

@@ -18,15 +18,20 @@
 
 #let d = json(bytes(sys.inputs.data))
 #let ncols = d.columns.len()
+// Wide statements (by month, with comparisons) turn the page and, past
+// seven columns, set smaller and tighter so a year of months fits.
+#let wide = ncols > 4
+#let dense = ncols > 7
 #let ink = luma(25)
 #let quiet = luma(110)
 #let hair = 0.5pt + luma(160)
 #let firm = 0.6pt + ink
 
 #set document(title: d.company + " — " + d.title, author: d.company)
-#set text(font: "Inter", size: 9pt, fill: ink, number-width: "tabular")
+#set text(font: "Inter", size: if dense { 7pt } else { 9pt }, fill: ink, number-width: "tabular")
 #set page(
   paper: "us-letter",
+  flipped: wide,
   margin: (x: 0.75in, top: 0.75in, bottom: 0.75in),
   header: context {
     if counter(page).get().first() > 1 {
@@ -58,7 +63,7 @@
   if a == none { return [] }
   let open = if a.negative { [(] } else { [] }
   let close = if a.negative { [)] } else { hide[)] }
-  let sign = if currency [\$] else []
+  let sign = if currency and a.at("percent", default: false) == false [\$] else []
   [#open#sign#a.digits#close]
 }
 
@@ -76,7 +81,7 @@
 }
 
 #table(
-  columns: (1fr,) + (8em,) * ncols,
+  columns: (1fr,) + (if dense { 6.6em } else { 8em },) * ncols,
   stroke: none,
   inset: (x: 4pt, y: 3.6pt),
   align: (left + horizon,) + (right + horizon,) * ncols,
@@ -84,7 +89,7 @@
     table.cell(stroke: (top: firm, bottom: hair), []),
     ..d.columns.map(c => table.cell(
       stroke: (top: firm, bottom: hair),
-      text(7.5pt, weight: "bold", tracking: 0.04em, upper(c)),
+      text(if dense { 6pt } else { 7.5pt }, weight: "bold", tracking: 0.04em, upper(c)),
     )),
   ),
   ..d