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>

res/lang/de.json

@@ -548,6 +548,8 @@
     "market_price_loading": "Preisdaten werden geladen...",
     "market_price_unavailable": "Preisdaten nicht verfügbar",
     "market_refresh_price": "Preisdaten aktualisieren",
+    "market_style_candle": "Zu Kerzenchart wechseln",
+    "market_style_line": "Zum Liniendiagramm wechseln",
     "market_trade_on": "Handeln auf %s",
     "market_updated": "\\xc2\\xb7 Aktualisiert %s",
     "market_vol_short": "Vol.",

res/lang/es.json

@@ -548,6 +548,8 @@
     "market_price_loading": "Cargando datos de precio...",
     "market_price_unavailable": "Datos de precio no disponibles",
     "market_refresh_price": "Actualizar datos de precio",
+    "market_style_candle": "Cambiar a velas",
+    "market_style_line": "Cambiar a gráfico de líneas",
     "market_trade_on": "Operar en %s",
     "market_updated": "\\xc2\\xb7 Actualizado %s",
     "market_vol_short": "Vol",

res/lang/fr.json

@@ -548,6 +548,8 @@
     "market_price_loading": "Chargement des données de prix...",
     "market_price_unavailable": "Données de prix indisponibles",
     "market_refresh_price": "Actualiser les données de prix",
+    "market_style_candle": "Passer aux chandeliers",
+    "market_style_line": "Passer au graphique en ligne",
     "market_trade_on": "Échanger sur %s",
     "market_updated": "\\xc2\\xb7 Mis à jour %s",
     "market_vol_short": "Vol",

res/lang/ja.json

@@ -548,6 +548,8 @@
     "market_price_loading": "価格データを読み込み中...",
     "market_price_unavailable": "価格データが利用できません",
     "market_refresh_price": "価格データを更新",
+    "market_style_candle": "ローソク足に切り替え",
+    "market_style_line": "折れ線チャートに切り替え",
     "market_trade_on": "%s で取引",
     "market_updated": "\\xc2\\xb7 更新: %s",
     "market_vol_short": "出来高",

res/lang/ko.json

@@ -548,6 +548,8 @@
     "market_price_loading": "가격 데이터를 불러오는 중...",
     "market_price_unavailable": "가격 데이터를 사용할 수 없습니다",
     "market_refresh_price": "가격 데이터 새로고침",
+    "market_style_candle": "캔들차트로 전환",
+    "market_style_line": "선형 차트로 전환",
     "market_trade_on": "%s에서 거래",
     "market_updated": "\\xc2\\xb7 업데이트됨 %s",
     "market_vol_short": "거래량",

res/lang/pt.json

@@ -548,6 +548,8 @@
     "market_price_loading": "Carregando dados de preço...",
     "market_price_unavailable": "Dados de preço indisponíveis",
     "market_refresh_price": "Atualizar dados de preço",
+    "market_style_candle": "Mudar para velas",
+    "market_style_line": "Mudar para gráfico de linhas",
     "market_trade_on": "Negociar no %s",
     "market_updated": "\\xc2\\xb7 Atualizado %s",
     "market_vol_short": "Vol",

res/lang/ru.json

@@ -548,6 +548,8 @@
     "market_price_loading": "Загрузка данных о ценах...",
     "market_price_unavailable": "Данные о ценах недоступны",
     "market_refresh_price": "Обновить данные о ценах",
+    "market_style_candle": "Переключить на свечи",
+    "market_style_line": "Переключить на линейный график",
     "market_trade_on": "Торговать на %s",
     "market_updated": "\\xc2\\xb7 Обновлено %s",
     "market_vol_short": "Объём",

res/lang/zh.json

@@ -548,6 +548,8 @@
     "market_price_loading": "正在加载价格数据...",
     "market_price_unavailable": "价格数据不可用",
     "market_refresh_price": "刷新价格数据",
+    "market_style_candle": "切换到蜡烛图",
+    "market_style_line": "切换到折线图",
     "market_trade_on": "在 %s 交易",
     "market_updated": "\\xc2\\xb7 已更新 %s",
     "market_vol_short": "成交量",