feat: implement Tesla smart charging v3 for Zaptec

- Beregner manglende kWh baseret på SOC og charge limit
- Finder de billigste 15-min elspot-timer før deadline
- Starter/stopper opladning via switch.home_charging
- Tilføjer failsafe 1 time før deadline
- Håndterer connected_finished session reset automatisk
- Stopper opladning når charge limit er nået
- Fuld modulopdeling: input_datetime, templates, binary_sensors, automations

include/automations/tesla_smart_charging.yaml

@@ -0,0 +1,44 @@
+- alias: Tesla smart charging v3
+  mode: single
+
+  trigger:
+    - platform: time_pattern
+      minutes: "/5"
+
+  condition:
+    - condition: time
+      before: input_datetime.tesla_charge_deadline
+
+  action:
+    - choose:
+
+        - conditions:
+            - condition: state
+              entity_id: binary_sensor.tesla_charge_now
+              state: "on"
+
+          sequence:
+            # Reset hvis session står i connected_finished
+            - choose:
+                - conditions:
+                    - condition: template
+                      value_template: "{{ states('sensor.home_charger_mode') == 'connected_finished' }}"
+                  sequence:
+                    - service: switch.turn_off
+                      target:
+                        entity_id: switch.home_charging
+                    - delay: "00:00:05"
+
+            - service: switch.turn_on
+              target:
+                entity_id: switch.home_charging
+
+        - conditions:
+            - condition: state
+              entity_id: binary_sensor.tesla_charge_now
+              state: "off"
+
+          sequence:
+            - service: switch.turn_off
+              target:
+                entity_id: switch.home_charging

include/automations/tesla_stop_when_full.yaml

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+- alias: Tesla stop when charged
+  trigger:
+    - platform: template
+      value_template: >
+        {{ states('sensor.snowywhite_battery')|float >=
+           states('number.snowywhite_charge_limit')|float }}
+
+  action:
+    - service: switch.turn_off
+      target:
+        entity_id: switch.home_charging
+        

include/binary_sensors/tesla_smart_charge.yaml

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+- name: tesla_charge_now
+  state: >
+    {% set deadline = states('input_datetime.tesla_charge_deadline') %}
+    {% set hours_needed = states('sensor.tesla_charge_hours_needed')|float(0)|round(0,'ceil') %}
+    {% set prices = state_attr('sensor.energidataservice','today') + state_attr('sensor.energidataservice','tomorrow') %}
+    {% set valid = [] %}
+
+    {# Filtrer kun timer før deadline #}
+    {% for p in prices %}
+      {% set slot_time = as_timestamp(strptime(p.hour,'%Y-%m-%dT%H:%M:%S')) %}
+      {% if slot_time <= as_timestamp(deadline) %}
+        {% set valid = valid + [p] %}
+      {% endif %}
+    {% endfor %}
+
+    {# Sorter efter pris #}
+    {% set sorted = valid | sort(attribute='price') %}
+
+    {# Vælg de billigste slots der dækker ladetiden #}
+    {% set cheapest = sorted[:hours_needed] %}
+
+    {# Tjek om nuværende slot er i listen #}
+    {% set now_slot = now().replace(minute=(now().minute//15)*15, second=0, microsecond=0).isoformat() %}
+    {{ cheapest | selectattr('hour','equalto',now_slot) | list | count > 0 }}
+    

include/templates/tesla_charging.yaml

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+- sensor:
+
+    - name: tesla_kwh_needed
+      unit_of_measurement: "kWh"
+      state: >
+        {% set capacity = 75 %}
+        {% set soc = states('sensor.snowywhite_battery')|float %}
+        {% set limit = states('number.snowywhite_charge_limit')|float %}
+        {{ ((limit - soc)/100 * capacity)|round(2) }}
+
+    - name: tesla_charge_hours_needed
+      unit_of_measurement: "h"
+      state: >
+        {% set power = 11 %}
+        {% set kwh = states('sensor.tesla_kwh_needed')|float %}
+        {{ (kwh / power)|round(2) }}