Add icon-only row-action labeling rule and data formatting conventions

Row-action buttons in a data table are icon-only and need deterministic
title/aria-label instead of repeated text. Also documents money and
date-precision formatting (whole-unit money with non-breaking-space
thousands grouping, ISO week numbers for day-level dates).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

rules/patterns/web-visual-baseline/contract.md

@@ -1,6 +1,6 @@
 # Contract: Web Visual Baseline
 
-Version: 1.0
+Version: 1.1
 
 ## Scope
 
@@ -60,6 +60,22 @@ Copy `assets/view.css` as the starting stylesheet and adapt tokens; do not rewri
 - Clear primary buttons for the main action on a screen.
 - Simple alert/error boxes with border + tinted background.
 
+## Data Formatting
+
+- Money: no minor units (no cents/kopecks) — round to whole currency units for
+  display. Group thousands with a non-breaking space (` `), not a comma
+  or dot — e.g. `$13 320`, not `$13,320.00`. The `ru-RU` locale's own
+  `toLocaleString()` grouping character is already a non-breaking space, so
+  `Math.round(value).toLocaleString('ru-RU')` satisfies this directly without
+  hand-rolled grouping logic.
+- Dates that only need day-level (not time-of-day) precision — a delivery
+  ETA, a planning/reorder date — are shown as an ISO week number: `W32`. When
+  a table row aggregates several dates that disagree (e.g. several purchase
+  lots under one order with different ETAs), show the week range instead:
+  `W32-34`. Audit-trail timestamps (created/updated-at) are exempt — show
+  those as ordinary dates, since collapsing them to a week would hide the
+  information they exist to convey.
+
 ## Status Rules
 
 - `OK`: green