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]/btc/page.tsx

@@ -1,71 +0,0 @@
-import { getFundingSnapshot, getPosts } from '@/lib/api'
-import type { Metadata } from 'next'
-import BtcPageClient from './BtcPageClient'
-
-const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'https://trumpsignal.com'
-export const revalidate = 30
-
-interface BtcPageProps {
-  params: Promise<{ locale: string }>
-}
-
-export async function generateMetadata({
-  params,
-}: BtcPageProps): Promise<Metadata> {
-  const { locale } = await params
-  const isZh = false  // i18n shelved — Chinese branches kept as dead code for future revival; see messages/zh.json
-
-  return {
-    title: isZh ? 'BTC 周期底部信号扫描器' : 'BTC Bottom Reversal Scanner',
-    description: isZh
-      ? 'Trump Alpha 的比特币周期底部扫描器，使用 AHR999、200 周均线和 Pi Cycle Bottom 三项经典信号做 2-of-3 共振判断，识别低频、高确定性的 BTC 长线底部区域。'
-      : 'Bitcoin macro-bottom scanner using a 2-of-3 price confluence: AHR999 deep-value zone, price near the 200-week moving average, and Pi Cycle Bottom. Rare, high-conviction long-only signals.',
-    keywords: isZh
-      ? [
-          'BTC 底部信号',
-          '比特币周期底部',
-          'AHR999',
-          '200 周均线',
-          'Pi Cycle Bottom',
-          '比特币反转信号',
-          '加密价格共振',
-        ]
-      : [
-          'Bitcoin bottom signal',
-          'AHR999',
-          '200-week moving average',
-          'Pi Cycle Bottom',
-          'BTC cycle bottom',
-          'Bitcoin macro bottom',
-          'Bitcoin reversal signal',
-          'crypto price confluence',
-        ],
-    openGraph: {
-      title: isZh ? 'BTC 周期底部信号扫描器 | Trump Alpha' : 'BTC Bottom Reversal Scanner | Trump Alpha',
-      description: isZh
-        ? '用 AHR999、200 周均线和 Pi Cycle Bottom 识别比特币宏观底部。低频，但每次触发都服务于长周期反转。'
-        : 'Bitcoin macro-bottom detector: 2-of-3 confluence across AHR999, 200-week MA, and Pi Cycle Bottom. Rare, high-conviction long-only signals.',
-    },
-    alternates: {
-      canonical: `${siteUrl}/${locale}/btc`,
-      languages: {
-        en: `${siteUrl}/en/btc`,
-        'x-default': `${siteUrl}/en/btc`,
-      },
-    },
-  }
-}
-
-export default async function BtcPage() {
-  const [posts, fundingSnapshot] = await Promise.all([
-    getPosts(500, 1).catch(() => null),
-    getFundingSnapshot().catch(() => null),
-  ])
-
-  return (
-    <BtcPageClient
-      initialPosts={posts}
-      initialFundingSnapshot={fundingSnapshot}
-    />
-  )
-}