docs: define layout overflow acceptance criteria

docs/feature/russian-layout-overflow.md

@@ -7,3 +7,10 @@ Workflow: P10 feedback → P7 narrow fix → P9 visual QA. Existing template, tr
 Scope: dashboard severity/status/risk presentation and shared sidebar labels. Acceptance: complete readable labels without overlapping adjacent cells at desktop and narrow widths, with existing themes/navigation preserved.
 Maintainability: style.css 47,163 lines and index.html are existing large composition files. High size risk; CSS presentation only, no new responsibility. Allowed narrow_fix; no broad refactor required. Validate actual template/styles/translations in Chromium, plus diff check. Assumption: wrapping is preferable to truncating operational status labels; no translation changes.
 Lifecycle: F0–F6 documentation here, scoped commits pushed per phase; Unreleased changelog, no merge/release/deploy requested.
+
+## F1 Requirements
+
+Small corrective scope inferred from explicit bug report; no unresolved product decision or separate draft requirements gate needed.
+REQ/AC-001: Russian status labels stay inside their cards with no overlap, including false-positive labels.
+REQ/AC-002: Risk badge, severity names and navigation labels remain fully readable by wrapping within available space.
+REQ/AC-003: Chinese/English, light/dark, desktop/tablet/mobile and collapsed sidebar retain usable layout and click targets. Data/loading/error rendering and API contracts unchanged.