Mortgage Calc v2 error word doc

[jenbreese]

READY FOR REVIEW

Summary

Shared fields

1. Interest rate: empty error (touched-gated per Rachel's note) and 0 to 20 inclusive range error. Also stopped silently clamping negatives so the range message can actually fire.
2. Down payment %: 0 to 99.9 inclusive range error.
3. Property tax % and insurance %: 0 to 10 inclusive range errors.
4. Property tax $ and insurance $: relative 10%-of-home-price cap errors (uses calculatedHomePrice on Tab 1, homePriceon Tab 2).
5. HOA dues: 0 to 20,000 inclusive. Removed the old silent clamp (Tab 1 was clamping to 100,000, Tab 2 unbounded) so out-of-range now blocks with a message.

Tab 1

1. Row 15 monthly payment empty error; Row 16 hard cap $1 to $1,000,000 (0 and negatives rejected).
2. Row 18 dollar down payment absolute ceiling 0 to 1,000,000,000.
3. Row 19 output backstop: if the estimate runs away (non-finite or past a display ceiling) it shows the "payment too high" message instead of a garbage number.

Tab 2

1. Row 20 home price empty error; Row 22 range $1 to $1,000,000,000 inclusive.
2. Row 23 negative down payment message; Row 24 dollar down payment >= home price now blocks with an error. I removed the clampDownPaymentAmount calls that were silently capping it, since that clamp made Row 24 impossible to trigger.

Cross-tab

1. Note 3: killed the page-level red banner and moved everything to inline role="alert" messages next to each field, with aria-invalid and aria-describedby wired up and the border turning red on error.
2. Note 4: no more silent resets. Every blocked field carries a visible message.
3. Governing rule (result OR warning, never both): results panel now shows results only when clean, a warning message on a genuine bad value, or a blank "enter values" placeholder for untouched/empty-required. No stale numbers.

[majimmy88]

LGTM