Weather: icon-left/temp-right layout, feels-like/high-low/rain

chance, and an hourly temperature graph

- Current conditions block redone horizontally (icon left, big temp
  + description + an extras line on the right) instead of stacked
  vertically.
- New extras line: "feels like" (apparent_temperature), today's
  high/low, and rain chance (precipitation_probability_max) -- each
  independently toggleable in settings, all on by default. Switched
  from the legacy current_weather=true param to Open-Meteo's current=
  param, since that's what exposes apparent_temperature; confirmed
  field names/formats live before wiring them in.
- New hourly-today temperature graph (also toggleable): a polyline
  across today's 24 hourly points, min/max temps labeled at their
  points, a red dot marking the current hour, and hour labels along
  the bottom.
- When both the graph and the daily forecast strip are shown, they
  split the remaining vertical space; either can be toggled off to
  give the other more room, matching how forecast_days already
  worked.

web/templates/settings_weather.html

@@ -34,6 +34,24 @@
       <input type="number" id="update_minutes" name="update_minutes" min="1" value="{{ settings.update_minutes or 30 }}">
       <p class="hint">Weather itself only refreshes the panel when something actually changed, so a shorter interval here mostly just means fresher data, not more flashing.</p>
     </div>
+    <div class="field">
+      <label class="checkbox">
+        <input type="checkbox" name="show_hourly_graph" {{ "checked" if settings.show_hourly_graph != False }}>
+        Hourly temperature graph
+      </label>
+      <label class="checkbox">
+        <input type="checkbox" name="show_feels_like" {{ "checked" if settings.show_feels_like != False }}>
+        "Feels like" temperature
+      </label>
+      <label class="checkbox">
+        <input type="checkbox" name="show_high_low" {{ "checked" if settings.show_high_low != False }}>
+        Today's high/low
+      </label>
+      <label class="checkbox">
+        <input type="checkbox" name="show_rain_chance" {{ "checked" if settings.show_rain_chance != False }}>
+        Rain chance
+      </label>
+    </div>
   </div>
 
   <div class="card">