fix(web): drop FM square badge from Logo; better 404 diagnostics on MoySklad page

Logo simplified to just "FOOD" (black) + "MARKET" (brand green) text — matches
the app-icon style without the distracting FM badge square.

MoySklad import page now shows actionable error text instead of generic
"Request failed with status code 404":
- 404 → "эндпоинт не существует, API не перезапущен после git pull"
- 401 → "сессия истекла, перелогинься"
- 403 → "нужна роль Admin или SuperAdmin"
- 502/503 → "МойСклад недоступен"
- Otherwise extracts body.error / error_description / title from response

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/food-market.web/src/components/AppLayout.tsx

@@ -55,7 +55,7 @@ export function AppLayout() {
     <div className="min-h-screen flex bg-slate-50 dark:bg-slate-950">
       <aside className="w-60 flex-shrink-0 bg-white dark:bg-slate-900 border-r border-slate-200 dark:border-slate-800 flex flex-col">
         <div className="h-14 flex items-center px-5 border-b border-slate-200 dark:border-slate-800">
-          <Logo size={28} />
+          <Logo />
         </div>
 
         <nav className="flex-1 overflow-y-auto py-3">

src/food-market.web/src/components/Logo.tsx

@@ -1,25 +1,17 @@
 import { cn } from '@/lib/utils'
 
-export function Logo({ size = 28, showText = true, className }: { size?: number; showText?: boolean; className?: string }) {
+export function Logo({ className }: { className?: string }) {
   return (
-    <div className={cn('flex items-center gap-2.5', className)}>
-      <div
-        className="flex items-center justify-center rounded-md font-black text-white leading-none"
-        style={{
-          backgroundColor: 'var(--color-brand)',
-          width: size,
-          height: size,
-          fontSize: Math.floor(size * 0.38),
-        }}
+    <div className={cn('flex flex-col leading-none select-none', className)}>
+      <span className="font-black text-slate-900 dark:text-slate-100 tracking-[0.08em] text-base">
+        FOOD
+      </span>
+      <span
+        className="font-black text-[11px] tracking-[0.24em] mt-0.5"
+        style={{ color: 'var(--color-brand)' }}
       >
-        FM
-      </div>
-      {showText && (
-        <div className="leading-tight">
-          <div className="font-black text-slate-900 dark:text-slate-100 tracking-wide">FOOD</div>
-          <div className="font-black text-xs tracking-[0.2em]" style={{ color: 'var(--color-brand)' }}>MARKET</div>
-        </div>
-      )}
+        MARKET
+      </span>
     </div>
   )
 }

src/food-market.web/src/pages/LoginPage.tsx

@@ -33,9 +33,9 @@ export function LoginPage() {
         onSubmit={handleSubmit}
         className="w-full max-w-md bg-white dark:bg-slate-800 rounded-xl shadow-lg p-8 space-y-5"
       >
-        <div className="space-y-3">
-          <Logo size={44} />
-          <p className="text-sm text-slate-500">Вход в систему</p>
+        <div>
+          <Logo />
+          <p className="text-sm text-slate-500 mt-2.5">Вход в систему</p>
         </div>
 
         <label className="block space-y-1.5">

src/food-market.web/src/pages/MoySkladImportPage.tsx

@@ -1,11 +1,29 @@
 import { useState } from 'react'
 import { useMutation, useQueryClient } from '@tanstack/react-query'
 import { AlertCircle, CheckCircle, Download, KeyRound } from 'lucide-react'
+import { AxiosError } from 'axios'
 import { api } from '@/lib/api'
 import { PageHeader } from '@/components/PageHeader'
 import { Button } from '@/components/Button'
 import { Field, TextInput, Checkbox } from '@/components/Field'
 
+function formatError(err: unknown): string {
+  if (err instanceof AxiosError) {
+    const status = err.response?.status
+    const body = err.response?.data as { error?: string; error_description?: string; title?: string } | undefined
+    const detail = body?.error ?? body?.error_description ?? body?.title
+    if (status === 404) {
+      return `404 Not Found — эндпоинт не существует. Вероятно, API не перезапущен после git pull. Сделай Ctrl+C → dotnet run.`
+    }
+    if (status === 401) return '401 Unauthorized — сессия истекла, перелогинься.'
+    if (status === 403) return '403 Forbidden — нужна роль Admin или SuperAdmin для этой операции.'
+    if (status === 502 || status === 503) return `${status} — МойСклад недоступен, попробуй позже.`
+    return detail ? `${status ?? ''} ${detail}` : err.message
+  }
+  if (err instanceof Error) return err.message
+  return String(err)
+}
+
 interface TestResponse { organization: string; inn?: string | null }
 interface ImportResponse {
   total: number
@@ -78,7 +96,7 @@ export function MoySkladImportPage() {
           )}
           {test.error && (
             <div className="text-sm text-red-600">
-              {(test.error as Error).message}
+              {formatError(test.error)}
             </div>
           )}
         </div>
@@ -138,7 +156,7 @@ export function MoySkladImportPage() {
 
       {run.error && (
         <div className="mt-5 p-3.5 rounded-md bg-red-50 dark:bg-red-950/20 border border-red-200 dark:border-red-900 text-sm text-red-700 dark:text-red-300">
-          Ошибка: {(run.error as Error).message}
+          Ошибка: {formatError(run.error)}
         </div>
       )}
     </div>