invoice show table output should include expense lines

[0x054]

Problem

ttd invoice show NUMBER (default table format) prints only time lines but the total includes expense subtotals. Expense lines are visible via --format md, TUI detail (o), rendered PDF, and invoice create --dry-run.

Expected

Table output should include a reimbursable expenses section (date, description, amount) matching PDF/Markdown renders.

Location

src/ttd/cli/invoices.py — show command ~L284–294

Context

Discovered while writing v0.9.0 expenses documentation. Workaround documented until fixed.