worker: align Telegram bot copy with the site (drop paper / dry-run wording)

Boot, status and help messages now say "Quant Agent" instead of
"$QUANT paper agent — dry-run", matching the de-paper'd site voice.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

worker/loop.ts

@@ -55,7 +55,7 @@ function statusMsg(): string {
     ? st.positions.map((p) => `${p.coin} ${p.dir}`).join(' · ')
     : '—'
   return [
-    `📊 <b>$QUANT</b> — paper · ${CONFIG.mode}`,
+    `📊 <b>Quant Agent</b>`,
     `equity ${usd(s.equity)} (${pct(s.roiPct)})`,
     `open ${open}`,
     `closed ${s.trades} · win ${Math.round(s.winRate * 100)}%`,
@@ -93,7 +93,7 @@ function positionsMsg(): string {
 
 const helpMsg = () =>
   [
-    '🤖 <b>$QUANT paper agent</b>',
+    '🤖 <b>Quant Agent</b>',
     '/status — equity, open positions, win rate',
     '/positions — open positions detail',
     '/pnl or /learn — retrospective over closed trades',
@@ -164,7 +164,7 @@ async function commandLoop(): Promise<void> {
 // ── boot ──────────────────────────────────────────────────────────────────────
 function bootMsg(s: Stats): string {
   return [
-    `🟩 <b>$QUANT</b> paper agent online — ${CONFIG.mode}`,
+    `🟩 <b>Quant Agent</b> online`,
     `${CONFIG.coins.join(' · ')} · ${CONFIG.interval} · poll ${CONFIG.pollMs / 1000}s`,
     `equity ${usd(s.equity)} · ${s.trades} trades so far`,
   ].join('\n')