The previous attempts to set up form cursor context in toggle-amount-mode
were failing because the cursor library's dynamic binding model is complex
and requires specific initialization through fc/start-form.
Instead of trying to recreate the cursor context, this fix:
1. Creates transaction-account-row-no-cursor* that renders rows with explicit
field names and values (no cursor functions)
2. Rewrites toggle-amount-mode to directly construct the data-grid HTML
using map-indexed over the accounts vector
3. Removes the broken manual cursor binding attempts
4. Removes unused auto-ap.cursor import
This ensures the toggle handler works independently of the wizard's cursor
context while still producing identical HTML output.