refactor(cabinet): migrate inline SVG icons to the central react-icons set

Audit-driven sweep: replaced 168 hand-written inline <svg> icons across 77
files with the central Phosphor (react-icons/pi) components from
@/components/icons, preserving each icon's size classes and colour (dynamic
stroke colours via the parent's currentColor, RefreshIcon's spinning state,
conditional rotate-180 chevrons).

Verified: tsc + vite build + eslint clean; an adversarial diff review of all
changed files found the replacements correct (70 files clean, 0 blockers).
Remaining inline <svg> dropped from 262 to ~95 — the survivors are legitimate
non-icons (brand/provider logos, loading spinners & framer-motion animations,
charts/sparklines, background decoration) plus a few ambiguous glyphs.

src/pages/Subscriptions.tsx

@@ -2,6 +2,7 @@ import { useState } from 'react';
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
 import { Navigate, useNavigate } from 'react-router';
 import { useTranslation } from 'react-i18next';
+import { ClipboardIcon, PlusIcon } from '@/components/icons';
 import { subscriptionApi } from '../api/subscription';
 import { balanceApi } from '../api/balance';
 import { useTheme } from '../hooks/useTheme';
@@ -24,19 +25,7 @@ function EmptyState({ onBuy }: { onBuy: () => void }) {
         className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl"
         style={{ background: g.innerBg }}
       >
-        <svg
-          className="h-8 w-8 opacity-40"
-          viewBox="0 0 24 24"
-          fill="none"
-          stroke="currentColor"
-          strokeWidth={1.5}
-        >
-          <path
-            strokeLinecap="round"
-            strokeLinejoin="round"
-            d="M9 12h3.75M9 15h3.75M9 18h3.75m3 .75H18a2.25 2.25 0 002.25-2.25V6.108c0-1.135-.845-2.098-1.976-2.192a48.424 48.424 0 00-1.123-.08m-5.801 0c-.065.21-.1.433-.1.664 0 .414.336.75.75.75h4.5a.75.75 0 00.75-.75 2.25 2.25 0 00-.1-.664m-5.8 0A2.251 2.251 0 0113.5 2.25H15c1.012 0 1.867.668 2.15 1.586m-5.8 0c-.376.023-.75.05-1.124.08C9.095 4.01 8.25 4.973 8.25 6.108V19.5a2.25 2.25 0 002.25 2.25h.75"
-          />
-        </svg>
+        <ClipboardIcon className="h-8 w-8 opacity-40" />
       </div>
       <h3 className="mb-2 text-xl font-semibold" style={{ color: g.text }}>
         {t('subscriptions.empty', 'Нет подписок')}
@@ -128,15 +117,7 @@ export default function Subscriptions() {
               border: '1px solid rgba(var(--color-accent-400), 0.2)',
             }}
           >
-            <svg
-              className="h-4 w-4"
-              viewBox="0 0 24 24"
-              fill="none"
-              stroke="currentColor"
-              strokeWidth={2.5}
-            >
-              <path strokeLinecap="round" strokeLinejoin="round" d="M12 4.5v15m7.5-7.5h-15" />
-            </svg>
+            <PlusIcon className="h-4 w-4" />
             {t('subscriptions.buyAnother', 'Новый тариф')}
           </button>
         )}