Fix proactive charging, logging, and status page ordering

1. SOC high bypass: when SOC >= soc_high_bypass_pct (default 90%), activate
   car charging without requiring a good forecast. Solves today's missed
   charging window where 4kW was exported for 6h with a full battery because
   the intraday forecast dropped from 15.4 to 13.3 kWh.

2. Log ambient_c in every cycle: makes it diagnosable why isHeatingPeriod
   suppresses SG-Ready on warm days (heating_min_ambient_c: 15°C gate).

3. Consumer names in logs: replace slog integer Consumer values with
   .String() so logs show "wallbox_a" instead of "2".

4. Status page order: reorder consumers by EMS priority (WallboxA →
   WallboxB → WW → SG-Ready) instead of the old reversed order.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

configs/ems-config.yaml

@@ -127,8 +127,9 @@ battery:
 
 # Proactive car charging strategy (forecast-driven, no export threshold required)
 car_charging:
-  min_soc: 35                    # start car charging only if battery SOC ≥ this (%)
+  min_soc: 25                    # start car charging only if battery SOC ≥ this (%)
   soc_floor: 5                   # emergency brake floor — stop if SOC drops below this (%)
+  soc_high_bypass_pct: 90        # activate without forecast check when SOC ≥ this % (battery full → always charge)
   eod_soc_target: 90             # desired battery SOC at end of day / sunset (%)
   eod_time: "16:00"              # start EOD soft-stop checks after this time
   no_car_retry_min: 30           # minutes before retrying after no-car detection