diff --git a/apps/web/src/components/page-shell.tsx b/apps/web/src/components/page-shell.tsx
index da746c7..0824993 100644
--- a/apps/web/src/components/page-shell.tsx
+++ b/apps/web/src/components/page-shell.tsx
@@ -1,5 +1,7 @@
-import type { ReactNode } from 'react'
+import { useEffect, useRef, type ReactNode } from 'react'
+import { useRouterState } from '@tanstack/react-router'
 import { cn } from '@cfdm/ui/lib/utils'
+import { DEBUG_BUILD_STAMP, debugAgentLog } from '@/lib/debug-agent-log'
 
 interface PageShellProps {
   children: ReactNode
@@ -7,5 +9,38 @@ interface PageShellProps {
 }
 
 export function PageShell({ children, className }: PageShellProps) {
-  return <div className={cn('flex flex-col gap-4 md:gap-6', className)}>{children}</div>
+  const ref = useRef<HTMLDivElement>(null)
+  const pathname = useRouterState({ select: (s) => s.location.pathname })
+
+  useEffect(() => {
+    const el = ref.current
+    if (!el) return
+    const main = el.closest('main')
+    const mainWidth = main?.clientWidth ?? 0
+    const shellWidth = el.clientWidth
+    const child = el.firstElementChild as HTMLElement | null
+    const childWidth = child?.clientWidth ?? 0
+    const childMaxWidth = child ? getComputedStyle(child).maxWidth : 'none'
+    debugAgentLog(
+      'page-shell.tsx:mount',
+      'page layout widths',
+      {
+        buildStamp: DEBUG_BUILD_STAMP,
+        pathname,
+        mainWidth,
+        shellWidth,
+        childWidth,
+        childMaxWidth,
+        shellClass: el.className,
+        childClass: child?.className ?? null,
+      },
+      'A',
+    )
+  }, [pathname])
+
+  return (
+    <div ref={ref} className={cn('flex flex-col gap-4 md:gap-6', className)}>
+      {children}
+    </div>
+  )
 }
diff --git a/apps/web/src/components/reui-kit/dashboard-analytics.tsx b/apps/web/src/components/reui-kit/dashboard-analytics.tsx
index c6f5cc2..4fb0d12 100644
--- a/apps/web/src/components/reui-kit/dashboard-analytics.tsx
+++ b/apps/web/src/components/reui-kit/dashboard-analytics.tsx
@@ -1,4 +1,4 @@
-import { useMemo } from 'react'
+import { useMemo, useEffect, useRef } from 'react'
 import { Bar, BarChart, CartesianGrid, Cell, Pie, PieChart, XAxis } from 'recharts'
 
 import { StatusBadge } from '@/components/status-badge'
@@ -17,6 +17,34 @@ import {
 } from '@cfdm/ui/components/chart'
 import { Separator } from '@cfdm/ui/components/separator'
 import { cn } from '@cfdm/ui/lib/utils'
+import { debugAgentLog } from '@/lib/debug-agent-log'
+
+function useChartSizeLog(chartId: string, dataLen: number) {
+  const ref = useRef<HTMLDivElement>(null)
+  useEffect(() => {
+    const el = ref.current
+    if (!el) return
+    const svg = el.querySelector('svg.recharts-surface')
+    const chartSlot = el.querySelector('[data-slot=chart]') as HTMLElement | null
+    debugAgentLog(
+      'dashboard-analytics.tsx:chart-mount',
+      'chart container dimensions',
+      {
+        chartId,
+        dataLen,
+        containerW: el.clientWidth,
+        containerH: el.clientHeight,
+        chartSlotW: chartSlot?.clientWidth ?? 0,
+        chartSlotH: chartSlot?.clientHeight ?? 0,
+        svgW: svg?.getAttribute('width') ?? null,
+        svgH: svg?.getAttribute('height') ?? null,
+        hasSvg: Boolean(svg),
+      },
+      'D',
+    )
+  }, [chartId, dataLen])
+  return ref
+}
 
 const statusChartConfig = {
   count: { label: 'Сертификаты' },
@@ -45,6 +73,7 @@ interface CertStatusChartProps {
 }
 
 export function CertStatusChart({ data }: CertStatusChartProps) {
+  const chartRef = useChartSizeLog('cert-status', data.length)
   const total = useMemo(
     () => data.reduce((sum, entry) => sum + entry.count, 0),
     [data],
@@ -60,7 +89,10 @@ export function CertStatusChart({ data }: CertStatusChartProps) {
         {data.length === 0 ? (
           <p className="text-muted-foreground text-sm">Нет данных о сертификатах</p>
         ) : (
-          <div className="grid w-full gap-6 @md:grid-cols-[9rem_minmax(0,1fr)] @md:items-center">
+          <div
+            ref={chartRef}
+            className="grid w-full gap-6 @md:grid-cols-[9rem_minmax(0,1fr)] @md:items-center"
+          >
             <div className="relative mx-auto size-36 shrink-0">
               <ChartContainer
                 config={statusChartConfig}
@@ -127,6 +159,8 @@ interface GroupDomainsChartProps {
 }
 
 export function GroupDomainsChart({ data }: GroupDomainsChartProps) {
+  const chartRef = useChartSizeLog('group-domains', data.length)
+
   return (
     <Frame dense spacing="sm" className="h-full w-full">
       <FrameHeader>
@@ -137,7 +171,7 @@ export function GroupDomainsChart({ data }: GroupDomainsChartProps) {
         {data.length === 0 ? (
           <p className="text-muted-foreground text-sm">Нет групп с доменами</p>
         ) : (
-          <div className="flex w-full flex-col gap-4">
+          <div ref={chartRef} className="flex w-full flex-col gap-4">
             <ChartContainer
               config={groupChartConfig}
               className="aspect-auto h-52 w-full min-h-52"
diff --git a/apps/web/src/components/reui-kit/ops-dashboard.tsx b/apps/web/src/components/reui-kit/ops-dashboard.tsx
index 6856beb..5dff125 100644
--- a/apps/web/src/components/reui-kit/ops-dashboard.tsx
+++ b/apps/web/src/components/reui-kit/ops-dashboard.tsx
@@ -1,4 +1,4 @@
-import type { ReactNode } from 'react'
+import { useEffect, useRef, type ReactNode } from 'react'
 import { Link } from '@tanstack/react-router'
 import {
   Frame,
@@ -8,6 +8,7 @@ import {
   FrameTitle,
 } from '@/components/reui/frame'
 import { cn } from '@cfdm/ui/lib/utils'
+import { debugAgentLog } from '@/lib/debug-agent-log'
 import { Item, ItemMedia } from '@cfdm/ui/components/item'
 
 export interface OpsKpiCard {
@@ -77,8 +78,28 @@ export function OpsDashboard({
   charts,
   queue,
 }: OpsDashboardProps) {
+  const rootRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    const el = rootRef.current
+    if (!el) return
+    debugAgentLog(
+      'ops-dashboard.tsx:mount',
+      'ops dashboard width',
+      {
+        clientWidth: el.clientWidth,
+        maxWidth: getComputedStyle(el).maxWidth,
+        className: el.className,
+      },
+      'A',
+    )
+  }, [])
+
   return (
-    <div className="text-foreground @container mx-auto flex w-full max-w-7xl flex-col gap-4 md:gap-6">
+    <div
+      ref={rootRef}
+      className="text-foreground @container mx-auto flex w-full max-w-7xl flex-col gap-4 md:gap-6"
+    >
       <header className="px-1">
         <h1 className="text-xl font-semibold tracking-tight">{title}</h1>
         <p className="text-muted-foreground max-w-2xl text-sm leading-relaxed">
diff --git a/apps/web/src/components/reui-kit/resource-page.tsx b/apps/web/src/components/reui-kit/resource-page.tsx
index 50dc86d..776e1bc 100644
--- a/apps/web/src/components/reui-kit/resource-page.tsx
+++ b/apps/web/src/components/reui-kit/resource-page.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useMemo, useState, type ReactNode } from 'react'
+import { useCallback, useMemo, useState, useEffect, useRef, type ReactNode } from 'react'
 import {
   getCoreRowModel,
   getPaginationRowModel,
@@ -36,6 +36,7 @@ import { Tabs, TabsList, TabsTrigger } from '@cfdm/ui/components/tabs'
 import { Alert, AlertDescription, AlertTitle } from '@cfdm/ui/components/alert'
 import { EmptyState } from '@/components/empty-state'
 import { applyFiltersToData } from './filter-utils'
+import { debugAgentLog } from '@/lib/debug-agent-log'
 
 export interface ResourcePageTab {
   id: string
@@ -115,6 +116,7 @@ export function ResourcePage<T extends object>({
   toolbarExtra,
   hideHeader = false,
 }: ResourcePageProps<T>) {
+  const frameRef = useRef<HTMLDivElement>(null)
   const [internalTab, setInternalTab] = useState(tabs?.[0]?.id ?? 'all')
   const activeTab = controlledTab ?? internalTab
 
@@ -225,7 +227,23 @@ export function ResourcePage<T extends object>({
 
   const emptyMessage = 'Нет записей по выбранным фильтрам.'
 
+  useEffect(() => {
+    const el = frameRef.current
+    if (!el) return
+    debugAgentLog(
+      'resource-page.tsx:mount',
+      'resource page width',
+      {
+        title,
+        clientWidth: el.clientWidth,
+        maxWidth: getComputedStyle(el).maxWidth,
+      },
+      'A',
+    )
+  }, [title])
+
   return (
+    <div ref={frameRef} className="w-full">
     <DataGrid
       table={table}
       recordCount={filteredData.length}
@@ -339,5 +357,6 @@ export function ResourcePage<T extends object>({
         </FramePanel>
       </Frame>
     </DataGrid>
+    </div>
   )
 }
diff --git a/apps/web/src/components/reui-kit/settings-shell.tsx b/apps/web/src/components/reui-kit/settings-shell.tsx
index 86b0bab..0257d6a 100644
--- a/apps/web/src/components/reui-kit/settings-shell.tsx
+++ b/apps/web/src/components/reui-kit/settings-shell.tsx
@@ -1,10 +1,11 @@
-import type { ReactNode } from 'react'
+import { useEffect, useRef, type ReactNode } from 'react'
 import { Link, Outlet, useRouterState } from '@tanstack/react-router'
 import { SettingsIcon } from 'lucide-react'
 
 import { useIsMobile } from '@cfdm/ui/hooks/use-mobile'
 import { cn } from '@cfdm/ui/lib/utils'
 import { PageShell } from '@/components/page-shell'
+import { debugAgentLog } from '@/lib/debug-agent-log'
 
 export interface SettingsTabConfig {
   id: string
@@ -34,11 +35,28 @@ export function SettingsShell({
   tabs = DEFAULT_TABS,
 }: SettingsShellProps) {
   const isMobile = useIsMobile()
+  const rootRef = useRef<HTMLDivElement>(null)
   const pathname = useRouterState({ select: (s) => s.location.pathname })
 
+  useEffect(() => {
+    const el = rootRef.current
+    if (!el) return
+    debugAgentLog(
+      'settings-shell.tsx:mount',
+      'settings shell width',
+      {
+        pathname,
+        clientWidth: el.clientWidth,
+        maxWidth: getComputedStyle(el).maxWidth,
+        className: el.className,
+      },
+      'A',
+    )
+  }, [pathname])
+
   return (
     <PageShell>
-      <div className="mx-auto flex w-full max-w-4xl flex-col gap-6">
+      <div ref={rootRef} className="mx-auto flex w-full max-w-4xl flex-col gap-6">
         <header className="px-1">
           <h1 className="text-xl font-semibold tracking-tight">{title}</h1>
           <p className="text-muted-foreground max-w-2xl text-sm leading-relaxed">
diff --git a/apps/web/src/lib/debug-agent-log.ts b/apps/web/src/lib/debug-agent-log.ts
new file mode 100644
index 0000000..04b1c2a
--- /dev/null
+++ b/apps/web/src/lib/debug-agent-log.ts
@@ -0,0 +1,28 @@
+/** Debug session 943716 — remove after layout/chart investigation */
+export const DEBUG_BUILD_STAMP = 'layout-charts-v1'
+
+export function debugAgentLog(
+  location: string,
+  message: string,
+  data: Record<string, unknown>,
+  hypothesisId: string,
+) {
+  // #region agent log
+  fetch('http://127.0.0.1:7580/ingest/5c1b60ca-3f59-41ce-8435-d25bcc12c3cf', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      'X-Debug-Session-Id': '943716',
+    },
+    body: JSON.stringify({
+      sessionId: '943716',
+      location,
+      message,
+      data,
+      hypothesisId,
+      timestamp: Date.now(),
+      runId: 'pre-fix',
+    }),
+  }).catch(() => {})
+  // #endregion
+}
diff --git a/apps/web/src/main.tsx b/apps/web/src/main.tsx
index a6d17d0..8c4307e 100644
--- a/apps/web/src/main.tsx
+++ b/apps/web/src/main.tsx
@@ -8,6 +8,12 @@ import { Toaster } from '@cfdm/ui/components/sonner'
 import { routeTree } from './routeTree.gen'
 import { queryClient } from './lib/queryClient'
 import '@cfdm/ui/globals.css'
+import { DEBUG_BUILD_STAMP, debugAgentLog } from '@/lib/debug-agent-log'
+
+debugAgentLog('main.tsx:boot', 'app boot', {
+  buildStamp: DEBUG_BUILD_STAMP,
+  href: typeof window !== 'undefined' ? window.location.href : '',
+}, 'B')
 
 const router = createRouter({
   routeTree,
diff --git a/apps/web/src/routes/_auth/index.tsx b/apps/web/src/routes/_auth/index.tsx
index 773e13d..4416772 100644
--- a/apps/web/src/routes/_auth/index.tsx
+++ b/apps/web/src/routes/_auth/index.tsx
@@ -1,6 +1,6 @@
 import { createFileRoute, Link } from '@tanstack/react-router'
 import { useQuery } from '@tanstack/react-query'
-import { useMemo, useState } from 'react'
+import { useMemo, useState, useEffect } from 'react'
 import {
   AlertTriangleIcon,
   FolderTreeIcon,
@@ -30,6 +30,7 @@ import {
   ItemTitle,
 } from '@cfdm/ui/components/item'
 import { formatRelative } from '@/lib/format'
+import { DEBUG_BUILD_STAMP, debugAgentLog } from '@/lib/debug-agent-log'
 
 export const Route = createFileRoute('/_auth/')({
   loader: ({ context: { queryClient } }) =>
@@ -109,6 +110,25 @@ function DashboardPage() {
   const certWarnings = countByStatus(summary, ['warning', 'expired', 'error'])
   const certOk = countByStatus(summary, ['active', 'ok'])
 
+  useEffect(() => {
+    if (isLoading) return
+    debugAgentLog(
+      'index.tsx:dashboard-data',
+      'dashboard chart inputs',
+      {
+        buildStamp: DEBUG_BUILD_STAMP,
+        summaryRaw: summary ?? null,
+        statusChartLen: statusChartData.length,
+        statusChartData,
+        groupChartLen: groupChartData.length,
+        groupChartData,
+        domainsLen: domains?.length ?? 0,
+        groupsLen: groups?.length ?? 0,
+      },
+      'C',
+    )
+  }, [isLoading, summary, statusChartData, groupChartData, domains, groups])
+
   const kpiCards = [
     {
       id: 'domains',