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plat 461

github-actions[bot] edited this page Oct 4, 2026 · 1 revision

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PLAT-461 — Auto-hidden navigation leaves an empty strip

Coordination Value
State fixed on main; not deployed
Date 2026-10-04
Owner frontend-chat

Problem

The screenshot supplied after PLAT-460 shows an empty vertical strip when navigation is hidden: the shell reserves six pixels and its hidden shadow remains visible at the workspace edge.

Fix

Auto-hide reserves no layout width. Its invisible six-pixel reveal target overlays the workspace; the 48-pixel rail and its shadow appear on edge hover or keyboard focus. Fixed mode still reserves the full rail width. The live navigation children stay mounted.

Validation

  • ProductTopBar tests verify zero-width hidden layout, saved preferences, hint interaction, and live monitor children staying mounted.
  • Browser preview measured hidden wrapper width 0, rail left -48, shadow none, and workspace left 0; verified hover/keyboard reveal.
  • Frontend type checking passed.

Left

Deployment and verification on deployed product surfaces.

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