fix: wallet/trades UX + SEO + commit Next.js 16 routing migration

Pre-launch audit findings (frontend):

- trades: unlock private history in-page. TradesPageClient only read a CACHED
  view envelope, so a connected user who hadn't visited Settings first saw
  "load settings once to unlock" with no way forward. Added an explicit
  "Unlock trade history" button that mints the view envelope via
  getOrCreateViewEnvelope (one signature, no gas) and reloads — no detour.
- wagmi: broaden connector from injected({target:'metaMask'}) to generic
  injected(). The MetaMask pin made Rabby / Coinbase ext / Brave / Frame / OKX
  and non-MetaMask browsers fail to connect. wagmi v2 EIP-6963 discovery covers
  all injected wallets; still uses the native provider path (not the MM SDK).
- sitemap: drop /settings. It was emitted in sitemap.xml while robots.ts
  disallows it — a self-contradicting crawler signal. Private pages stay out
  of both.
- docs: note the app runs on port 3001 (package.json), not 3000. The CLAUDE.md
  verify sweep targeted 3000 and would have reported every page as down.
- routing: COMMIT the Next.js 16 migration that was sitting uncommitted —
  delete middleware.ts, add root proxy.ts (next-intl createMiddleware), update
  next-env.d.ts. Vercel deploys from git, so leaving proxy.ts untracked would
  have shipped the old routing. `next build` confirms "Proxy (Middleware)" is
  active and all routes compile. tsc clean.

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

app/[locale]/trades/TradesPageClient.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { useState, useEffect } from 'react'
+import { useState, useEffect, useRef } from 'react'
 import Link from 'next/link'
 import { usePathname } from 'next/navigation'
 import { useLocale } from 'next-intl'
@@ -8,7 +8,7 @@ import { useAccount, useSignMessage } from 'wagmi'
 import type { BotTrade, TrumpPost } from '@/types'
 import { getTrades, getPosts } from '@/lib/api'
 import { useDashboardStore } from '@/store/dashboard'
-import { getCachedViewEnvelope } from '@/lib/signedRequest'
+import { getCachedViewEnvelope, getOrCreateViewEnvelope, type SignedEnvelope } from '@/lib/signedRequest'
 import TradeTable from '@/components/trades/TradeTable'
 import OpenPositions from '@/components/positions/OpenPositions'
 import PageHint from '@/components/ui/PageHint'
@@ -17,6 +17,7 @@ export default function TradesPageClient() {
   const intlLocale = useLocale()
   const isZh = false  // i18n shelved — Chinese branches kept as dead code for future revival; see messages/zh.json
   const { address, isConnected } = useAccount()
+  const { signMessageAsync } = useSignMessage()
   const { isSubscribed, hlApiKeySet } = useDashboardStore()
   const pathname = usePathname()
   const locale = pathname.split('/')[1] || 'en'
@@ -26,53 +27,76 @@ export default function TradesPageClient() {
   const [posts, setPosts] = useState<TrumpPost[]>([])
   const [loading, setLoading] = useState(true)
   const [loadErr, setLoadErr] = useState('')
+  const [needsUnlock, setNeedsUnlock] = useState(false)
+  const [unlocking, setUnlocking] = useState(false)
 
-  useEffect(() => { setMounted(true) }, [])
-
+  const aliveRef = useRef(true)
   useEffect(() => {
-    let cancelled = false
+    setMounted(true)
+    aliveRef.current = true
+    return () => { aliveRef.current = false }
+  }, [])
+
+  // Load public posts always; load private trades only if we have a view
+  // envelope. `forcedEnv` lets the in-page Unlock button pass a freshly-minted
+  // one so the user never has to detour through the Settings page first.
+  async function loadAll(forcedEnv?: SignedEnvelope) {
     if (!address || !isConnected) {
-      setTrades([])
-      setPosts([])
-      setLoading(false)
-      setLoadErr('')
+      setTrades([]); setPosts([]); setLoading(false); setLoadErr(''); setNeedsUnlock(false)
       return
     }
     setLoading(true)
-    ;(async () => {
-      let failed = false
-      try {
-        const env = getCachedViewEnvelope('view_trades', address)
-          ?? getCachedViewEnvelope('view_user', address)
-        const [t, p] = await Promise.all([
-          env
-            ? getTrades(address, env, 100, 1).catch(e => {
-              failed = true
-              setLoadErr(e instanceof Error ? e.message : (isZh ? '交易加载失败' : 'Failed to load trades'))
-              return [] as BotTrade[]
-            })
-            : Promise.resolve([] as BotTrade[]),
-          getPosts(500, 1).catch(() => [] as TrumpPost[]),
-        ])
-        if (!cancelled) {
-          setTrades(t)
-          setPosts(p)
-          if (!env) {
+    const env = forcedEnv
+      ?? getCachedViewEnvelope('view_trades', address)
+      ?? getCachedViewEnvelope('view_user', address)
+    let failed = false
+    try {
+      const [t, p] = await Promise.all([
+        env
+          ? getTrades(address, env, 100, 1).catch(e => {
             failed = true
-            setLoadErr('Load your settings once on the Settings page to unlock private trade history.')
-          } else if (!failed) {
-            setLoadErr('')
-          }
-        }
-      } finally {
-        if (!cancelled) setLoading(false)
-      }
-    })()
-    return () => { cancelled = true }
-  // isZh intentionally excluded: compile-time constant (always false).
+            setLoadErr(e instanceof Error ? e.message : 'Failed to load trades')
+            return [] as BotTrade[]
+          })
+          : Promise.resolve([] as BotTrade[]),
+        getPosts(500, 1).catch(() => [] as TrumpPost[]),
+      ])
+      if (!aliveRef.current) return
+      setTrades(t)
+      setPosts(p)
+      setNeedsUnlock(!env)
+      if (env && !failed) setLoadErr('')
+    } finally {
+      if (aliveRef.current) setLoading(false)
+    }
+  }
+
+  useEffect(() => {
+    // On navigation we only use a cached envelope — never auto-popup the
+    // wallet. If none is cached the user unlocks explicitly via the button.
+    void loadAll()
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [address, isConnected])
 
+  // Mint a view envelope right here (one signature) and reload — no Settings detour.
+  async function handleUnlock() {
+    if (!address) return
+    setUnlocking(true)
+    setLoadErr('')
+    try {
+      const env = await getOrCreateViewEnvelope({
+        action: 'view_trades', wallet: address, signMessageAsync,
+      })
+      await loadAll(env)
+    } catch (e) {
+      // User rejected the signature or it failed — keep the Unlock CTA visible.
+      const msg = e instanceof Error ? e.message : 'Signature cancelled'
+      if (aliveRef.current) setLoadErr(/reject|denied|cancel/i.test(msg) ? '' : msg)
+    } finally {
+      if (aliveRef.current) setUnlocking(false)
+    }
+  }
+
   const needsSetup = mounted && isConnected && (!isSubscribed || !hlApiKeySet)
 
   return (
@@ -113,6 +137,23 @@ export default function TradesPageClient() {
 
       <OpenPositions />
 
+      {mounted && isConnected && !loading && needsUnlock && (
+        <div className="card" style={{
+          padding: 16, margin: '12px 0', textAlign: 'center', fontSize: 13,
+          background: 'var(--amber-soft)',
+          borderColor: 'color-mix(in oklab, var(--amber) 22%, var(--line))',
+        }}>
+          <div style={{ marginBottom: 10, color: 'var(--ink-2)' }}>
+            🔒 Your trade history is private. Sign once to unlock it on this device
+            (valid for a few minutes, no transaction, no gas).
+          </div>
+          <button className="btn amber" style={{ fontSize: 13, padding: '8px 16px' }}
+            disabled={unlocking} onClick={handleUnlock}>
+            {unlocking ? 'Waiting for signature…' : 'Unlock trade history'}
+          </button>
+        </div>
+      )}
+
       {!loading && loadErr && (
         <div className="card" style={{ padding: 16, margin: '12px 0', textAlign: 'center',
                                        color: 'var(--down)', fontSize: 13 }}>