fix(analytics): never mix paper + live P&L; settings live-switch copy

Money-safety/accuracy bug: analytics computed total P&L, win rate, drawdown,
and every metric over ALL trades regardless of is_paper. A user who tried
paper mode then went live saw simulated and real P&L summed into one number
on the page whose entire purpose is 'did the bot make REAL money'.

Now: split trades by is_paper. Default to LIVE. A Live/Paper toggle appears
only when the wallet has both; otherwise auto-pick whichever exists. Paper
view shows a prominent 'SIMULATED — not real-money results' banner. All
metrics derive from the selected mode's trades only.

Also: BotConfigPanel handleUpgradeToLive copy now states Auto-Trade is forced
OFF on the paper→live switch (matches backend subscribe.py safety reset).

tsc + next build clean.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/[locale]/DashboardClient.tsx

@@ -303,9 +303,9 @@ export default function DashboardClient({ initialPosts }: Props) {
         <div>
           <h1 className="page-title">{isZh ? '信号总览' : 'Signal monitor'}</h1>
           <PageHint count={`${actionablePosts} actionable · ${totalPosts} tracked`}>
-            All four signal pipelines in one place — Trump posts, BTC macro
-            bottom, funding-rate extremes, and KOL talks-vs-trades — alongside
-            your auto-trader's live state.
+            Four signals that move crypto before the crowd sees them — Trump
+            posts, BTC macro bottoms, funding extremes, and what KOLs do vs
+            say. Tracked live, in public, every call timestamped.
           </PageHint>
         </div>
         <div className="row gap-s">