feat(market): line/candle toggle + ~50% taller chart

- Add a chart-style toggle (line vs candlestick) next to the interval buttons,
  shown only when the selected range has per-exchange candles (the aggregate /
  Live view is line-only). It flips s_mkt.chartStyle; candles draw when OHLC
  exists AND the user hasn't switched to the line. Icon reflects the current
  style; tooltip says what a click switches to. Two i18n keys across 8 languages.
- Make the price chart ~50% taller: scale the height floor / desired / viewport
  cap (110->165, x1.5 desired, 0.22->0.33 of available) for a roomier plot.

Verified via a forced-OHLC render: the taller chart, the toggle button, and
candles with a correct week/day x-axis.

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

scripts/add_missing_translations.py

@@ -2260,6 +2260,18 @@ TRANSLATIONS = {
         "ru": "Загрузка истории цен", "zh": "正在加载价格历史",
         "ja": "価格履歴を読み込み中", "ko": "가격 기록 불러오는 중"
     },
+    "market_style_line": {
+        "es": "Cambiar a gráfico de líneas", "de": "Zum Liniendiagramm wechseln",
+        "fr": "Passer au graphique en ligne", "pt": "Mudar para gráfico de linhas",
+        "ru": "Переключить на линейный график", "zh": "切换到折线图",
+        "ja": "折れ線チャートに切り替え", "ko": "선형 차트로 전환"
+    },
+    "market_style_candle": {
+        "es": "Cambiar a velas", "de": "Zu Kerzenchart wechseln",
+        "fr": "Passer aux chandeliers", "pt": "Mudar para velas",
+        "ru": "Переключить на свечи", "zh": "切换到蜡烛图",
+        "ja": "ローソク足に切り替え", "ko": "캔들차트로 전환"
+    },
 }
 
 def main():