feat: Typst-typeset statements in US accounting format

The printpdf statements padded columns with spaces in a proportional font
(amounts didn't line up), had no company name, printed negatives as
"-207.68", and put everything on one page (a long statement was silently
cut off past ~70 lines). Now:

- PDFs are typeset by Typst from one template,
  ledger-import/templates/statement.typ. The laid-out statement goes in as
  JSON data (sys.inputs), so account names are never parsed as markup.
  Fonts are bundled (typst-assets: Libertinus Serif), so output doesn't
  depend on the machine and is byte-for-byte deterministic. Statements
  paginate, with the company/title repeated on later pages and "Page n of
  m" plus "Prepared from journal through seq N" in the footer.
- US accounting presentation, decided once in ledger-import::report and
  applied by both PDF and XLSX: tabular figures; "$" on each section's
  first amount and on every subtotal and total, pinned to the column's
  left edge; negatives in parentheses with the closing paren hanging (its
  width reserved on every row, so decimal points align); zero as a dash;
  a single rule above sums (none over an empty section) and a double rule
  under statement totals; amounts never bold, because bold figures are
  wider and would leave the decimal column. XLSX uses Excel's own
  Accounting formats for the same result.
- Cash flow: "Net change in cash" is a subtotal; only "Cash at end of
  period" takes the double rule.
- Core fix: cash_flow walked the chart in HashMap order, so the order of
  working-capital and financing lines could change between runs. Lines
  now follow account code. Test: five owners, twenty runs, always
  3000/3001/3003/3005/3009; fails without the sort.

New dependencies (ledger-import): typst, typst-layout, typst-pdf,
typst-assets (fonts), typst-as-lib (World/font plumbing), serde_json (the
template's data). Removed: printpdf. Release ledger-mcp grows by the
bundled fonts.

Tests: exact template data for a hand-built P&L (like a golden); same
statement renders to identical bytes; 200 rows of Typst markup
characters render literally and span several pages; currency-sign and
rule placement; amount splitting.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MtYEaR6M6Ybdhm6X98BWNu

plan/STATUS.md

@@ -178,3 +178,14 @@ interface is MCP, not a cloned GUI. The first storage + MCP slice is done
   report headers, `fiscal_year_start` for fiscal YTD (end derived), and
   `receipt_threshold` (it was silently ignored before). Reports carry
   "Prepared from journal through seq N".
+- 2026-10-11: PDFs are typeset with Typst (typst 0.15 via typst-as-lib,
+  fonts bundled by typst-assets; printpdf removed). One template,
+  `ledger-import/templates/statement.typ`, takes the laid-out statement as
+  JSON data (labels are never markup). US accounting presentation in PDF
+  and XLSX alike: tabular figures, "$" on each section's first amount and
+  on totals, negatives in parentheses with the closing paren hanging so
+  decimal points align, zero as a dash, single rule over sums, double rule
+  under totals, amounts never bold (bold figures are wider). Pages flow
+  with a repeated header and "Page n of m". Core's cash flow now orders
+  lines by account code (it followed HashMap order, so line order could
+  change between runs).