chore: adiciona Docker, scripts e documentacao

- Adiciona Dockerfile e docker-compose para containerizacao
- Adiciona docker-entrypoint.sh com inicializacao
- Adiciona scripts/seed-admin.js para criar admin inicial
- Adiciona docs/ com logos originais CambioReal
- Atualiza README.md com instrucoes de uso
- Atualiza queries.js com metricas de portfólio

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/queries.js

@@ -94,4 +94,133 @@ function serialize(rowsBrlUsd, rowsUsdBrl) {
   return [...dataBrlUsd, ...dataUsdBrl].sort((a, b) => a.data_sort.localeCompare(b.data_sort));
 }
 
-module.exports = { fetchTransacoes, serialize };
+// Fetch ALL transactions (for admin) - with date filter for performance
+async function fetchAllTransacoes(diasAtras = 90) {
+  const conn = await pool.getConnection();
+  try {
+    const [rowsBrlUsd] = await conn.execute(`
+      SELECT
+        c.nome                                             AS cliente,
+        t.created_at                                       AS data_operacao,
+        t.amount_brl                                       AS valor_reais,
+        t.amount_usd                                       AS valor_dolar,
+        t.iof                                              AS iof_pct,
+        ROUND(t.iof / 100 * t.amount_usd * t.exchange_rate, 2) AS iof_valor_rs,
+        ROUND(t.ptax, 4)                                   AS taxa_ptax,
+        ROUND(t.exchange_rate, 4)                           AS taxa_cobrada,
+        ROUND(t.exchange_rate - t.ptax, 4)                  AS spread_bruto,
+        ROUND((t.exchange_rate - t.ptax) / t.exchange_rate * 100, 2) AS spread_pct,
+        t.status
+      FROM br_transaction_to_usa t
+      INNER JOIN conta c ON c.id_conta = t.id_conta
+      WHERE t.created_at >= DATE_SUB(CURDATE(), INTERVAL ? DAY)
+      ORDER BY t.created_at DESC
+    `, [diasAtras]);
+
+    const [rowsUsdBrl] = await conn.execute(`
+      SELECT
+        c.nome                                             AS cliente,
+        p.created_at                                       AS data_operacao,
+        p.valor_sol                                        AS valor_reais,
+        p.valor                                            AS valor_dolar,
+        0                                                  AS iof_pct,
+        0                                                  AS iof_valor_rs,
+        ROUND(p.ptax, 4)                                   AS taxa_ptax,
+        ROUND(p.cotacao, 4)                                AS taxa_cobrada,
+        ROUND(p.ptax - p.cotacao, 4)                       AS spread_bruto,
+        CASE WHEN p.cotacao > 0 THEN ROUND((p.ptax - p.cotacao) / p.ptax * 100, 2) ELSE 0 END AS spread_pct,
+        p.pgto                                             AS status
+      FROM pagamento_br p
+      INNER JOIN conta c ON c.id_conta = p.id_conta
+      WHERE p.created_at >= DATE_SUB(CURDATE(), INTERVAL ? DAY)
+      ORDER BY p.created_at DESC
+    `, [diasAtras]);
+
+    return { rowsBrlUsd, rowsUsdBrl };
+  } finally {
+    conn.release();
+  }
+}
+
+// Fast daily stats for admin home (today and yesterday only)
+// Separates USD->BRL (with cotacao) from USD->USD (balance/no cotacao)
+async function fetchDailyStats() {
+  const conn = await pool.getConnection();
+  try {
+    // BRL -> USD counts and volumes for today and yesterday
+    const [brlUsdStats] = await conn.execute(`
+      SELECT
+        DATE(created_at) as dia,
+        COUNT(*) as qtd,
+        ROUND(SUM(amount_brl), 2) as total_brl,
+        ROUND(SUM(amount_usd), 2) as total_usd
+      FROM br_transaction_to_usa
+      WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 1 DAY)
+      GROUP BY DATE(created_at)
+      ORDER BY dia DESC
+    `);
+
+    // USD -> BRL (with cotacao - real currency exchange)
+    const [usdBrlStats] = await conn.execute(`
+      SELECT
+        DATE(created_at) as dia,
+        COUNT(*) as qtd,
+        ROUND(SUM(valor_sol), 2) as total_brl,
+        ROUND(SUM(valor), 2) as total_usd
+      FROM pagamento_br
+      WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 1 DAY)
+        AND cotacao IS NOT NULL AND cotacao > 0
+        AND (pgto IS NULL OR pgto != 'balance')
+      GROUP BY DATE(created_at)
+      ORDER BY dia DESC
+    `);
+
+    // USD -> USD (balance or no cotacao - dollar to dollar)
+    const [usdUsdStats] = await conn.execute(`
+      SELECT
+        DATE(created_at) as dia,
+        COUNT(*) as qtd,
+        ROUND(SUM(valor), 2) as total_usd
+      FROM pagamento_br
+      WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 1 DAY)
+        AND (cotacao IS NULL OR cotacao = 0 OR pgto = 'balance')
+      GROUP BY DATE(created_at)
+      ORDER BY dia DESC
+    `);
+
+    // Format results
+    const today = new Date().toISOString().slice(0, 10);
+    const yesterday = new Date(Date.now() - 86400000).toISOString().slice(0, 10);
+
+    const formatDay = (stats, targetDate) => {
+      const row = stats.find(r => {
+        const d = r.dia instanceof Date ? r.dia.toISOString().slice(0, 10) : String(r.dia).slice(0, 10);
+        return d === targetDate;
+      });
+      return row ? {
+        qtd: Number(row.qtd),
+        total_brl: Number(row.total_brl) || 0,
+        total_usd: Number(row.total_usd) || 0
+      } : { qtd: 0, total_brl: 0, total_usd: 0 };
+    };
+
+    return {
+      brlUsd: {
+        hoje: formatDay(brlUsdStats, today),
+        ontem: formatDay(brlUsdStats, yesterday)
+      },
+      usdBrl: {
+        hoje: formatDay(usdBrlStats, today),
+        ontem: formatDay(usdBrlStats, yesterday)
+      },
+      usdUsd: {
+        hoje: formatDay(usdUsdStats, today),
+        ontem: formatDay(usdUsdStats, yesterday)
+      }
+    };
+  } finally {
+    conn.release();
+  }
+}
+
+module.exports = { fetchTransacoes, fetchAllTransacoes, serialize, fetchDailyStats };