feat(market): trend sparkline in all portfolio styles + inline chart/style pickers

Render the portfolio trend sparkline in every row style, each with a layout that features it:
- Table: a dedicated header-labelled TREND column (48dp rows), aligned across rows.
- Cards: a left-aligned info stack (icon + label / value+delta chip / DRGX) with a full-height sparkline filling the rest of the width (content-driven, so short groups give the chart more room).
- Spotlight: a big-value-over-a-full-width-chart-band hero tile (92dp).
Default sparkline interval is now MONTH (a real curve from the daily series, not the young minute buffer). Removed the per-row container accent line (redundant with the icon/sparkline colour) and the per-group shielded/transparent bar (private-by-default makes it near-always 100%, and dropped its now-dead SumPortfolioSplit helper). DPI-scale the sparkline stroke. Adds the "Trend" column string across 9 languages.

Relocated the Market controls out of a removed settings modal + gear: the chart line/candle picker now sits top-right of the chart (left of the trade button, candle-capable ranges only), and the Table/Cards/Spotlight picker sits left of Manage. Dropped the market fetch-prices toggle (still in the general Settings page).

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

res/lang/de.json

@@ -731,6 +731,7 @@
     "market_cap_short": "Kap.",
     "market_chart_loading": "Preisverlauf wird geladen",
     "market_col_name": "Name",
+    "market_col_trend": "Trend",
     "market_col_value": "Wert",
     "market_iv_1d": "1T",
     "market_iv_1h": "1S",