diff --git a/src/app/state/sidebarWidth.ts b/src/app/state/sidebarWidth.ts
index 5635095c..a13ff5ee 100644
--- a/src/app/state/sidebarWidth.ts
+++ b/src/app/state/sidebarWidth.ts
@@ -5,7 +5,12 @@ import {
 } from './utils/atomWithLocalStorage';
 
 export const SIDEBAR_WIDTH_KEY = 'vojo_sidebar_width';
-export const SIDEBAR_WIDTH_MIN = 320;
+// Floor must fit the StreamHeader tabs row in full: 3 segment buttons
+// (Личные/Каналы/Роботы — RU is the widest locale) plus the two
+// action icons (Plus / Search) plus the row's 8px horizontal padding.
+// Measured at ≈378px in RU; 384 gives a few px of breathing room and
+// keeps the icon cluster from clipping at the curtain's right edge.
+export const SIDEBAR_WIDTH_MIN = 384;
 export const SIDEBAR_WIDTH_DEFAULT = 416;
 
 const readSidebarWidth = (key: string): number => {