feat(macro-vibes): rename BTC Signal → Macro Vibes; add MacroPanel UI

Module rename across page H1, navbar tab, URL (/en/btc → /en/macro),
all metadata/JSON-LD, sitemap, llms.txt, opengraph image, and SystemControl
copy. Old /btc route fully removed.

New components/btc/MacroPanel.tsx polls /api/macro/snapshot and lays out
the 8 indicators in four sections (Valuation / Bottom trigger reference /
Market structure / Sentiment & flows / Positioning) with tone-coloured
values, current-band threshold chips, and a single CoinGlass / source
chart link per card. Composite -100..+100 needle pulses on score change.

Also fixes the pinned bottom-reversal alert on the homepage, which still
linked to the now-404 /en/btc — now routes to /en/macro.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/[locale]/settings/SettingsClient.tsx

@@ -7,6 +7,7 @@ import { useLocale } from 'next-intl'
 import { useAccount } from 'wagmi'
 import BotConfigPanel from '@/components/trades/BotConfigPanel'
 import TelegramCard from '@/components/telegram/TelegramCard'
+import PageHint from '@/components/ui/PageHint'
 
 /**
  * Settings page — the home for all configuration.
@@ -30,7 +31,17 @@ export default function SettingsClient() {
   const href = (path: string) => `/${locale}${path}`
 
   return (
-    <div>
+    <div className="page">
+      <div className="page-head">
+        <div>
+          <h1 className="page-title">{isZh ? '设置' : 'Settings'}</h1>
+          <PageHint>
+            Everything that controls your account — subscription, Hyperliquid
+            API key, bot risk parameters, and Telegram alerts.
+          </PageHint>
+        </div>
+      </div>
+
       {/* Account card — quick "who am I logged in as" */}
       <div className="card" style={{ padding: 20, marginBottom: 16 }}>
         <div style={{ fontSize: 11, fontWeight: 600, letterSpacing: '0.06em',