Fix compressor watts, add WW boost reset button

Compressor:
- metric changed to PromQL expression that returns actual watts:
  sensors_power_value(%) × power_value(kW) × 10
  e.g. 27% × 10 kW = 2700 W; idle = 0 W
- idle threshold raised 20→500 W (clean gap: 0W idle vs ≥2700W running)
- status page now displays real kW instead of percent

WW boost reset:
- Added 🌡️ Zurücksetzen button to WW consumer card (when configured)
- POST /ww/reset: restores WWBaseC via Viessmann API + blocks re-boost
  via engine override until midnight
- IsWW field added to consumerView for template control

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

configs/ems-config.yaml

@@ -10,7 +10,7 @@ prometheus:
     battery_soc: "ess_stateOfCharge_value"                     # 0-100%
     pv_production: "photovoltaic_production_current_value"     # watts
     battery_power: "ess_power_value"                           # watts
-    compressor_power: "heating_compressors_0_sensors_power_value"  # % of rated power (0=idle, 27-92=running); _power_value is rated kW (constant 10)
+    compressor_power: "heating_compressors_0_sensors_power_value * heating_compressors_0_power_value * 10"  # actual watts: sensors(%) × rated_kW(10) × 10
     ambient_temp: "heating_sensors_temperature_outside_value"  # °C
     phase_l1_power: "pcc_ac_active_power_phaseOne"             # per-phase grid power L1 (W)
     phase_l2_power: "pcc_ac_active_power_phaseTwo"             # per-phase grid power L2 (W)
@@ -78,7 +78,7 @@ strategic:
 
 # Consumer behavior — idle detection thresholds
 consumers:
-  compressor_idle_w: 20       # compressor idle threshold: sensors_power_value is % of rated power; 0%=idle, ≥27%=running → 20 cleanly separates them
+  compressor_idle_w: 500      # heat pump compressor below this = idle (W); running starts at ~2700W, so 500W cleanly separates idle (0W) from running
   wallbox_min_charge_w: 50    # wallbox below this = car not charging (W)
   idle_cycles: 3              # consecutive idle cycles before early release (~6 min at 2-min poll)