improve(automation): increase reliability of tesla charging control

- Change mode to restart to prevent skipped runs
- Replace failsafe template trigger with time_pattern
- Add plugged-in condition to avoid unnecessary switching
- Add explicit deadline validation condition

Result:
- More reliable execution of charging logic
- Prevents missed failsafe activation
- Reduces unnecessary charger toggling

include/automations/tesla_charge_failsafe.yaml

@@ -1,12 +1,15 @@
 - alias: Tesla failsafe charge
   trigger:
-    - platform: template
+    - platform: time_pattern
+      minutes: "/5"
+
+  condition:
+    - condition: template
       value_template: >
         {% set deadline_ts = as_timestamp(states('input_datetime.tesla_charge_deadline')) %}
         {% set now_ts = as_timestamp(now()) %}
-        {{ (deadline_ts - now_ts) <= 3600 }}  # 1 time = 3600 sekunder
+        {{ (deadline_ts - now_ts) <= 3600 }}
 
-  condition:
     - condition: numeric_state
       entity_id: sensor.tesla_kwh_needed
       above: 0
@@ -14,4 +17,4 @@
   action:
     - service: switch.turn_on
       target:
-        entity_id: switch.home_charging
+        entity_id: switch.home_charging

include/automations/tesla_stop_when_full.yaml

@@ -2,8 +2,8 @@
   trigger:
     - platform: template
       value_template: >
-        {{ states('sensor.snowywhite_battery')|float >=
-           states('number.snowywhite_charge_limit')|float }}
+        {{ (states('sensor.snowywhite_battery') | default(0)) | float >=
+           (states('number.snowywhite_charge_limit') | default(100)) | float }}
 
   action:
     - service: switch.turn_off

include/templates/tesla_smart_charge.yaml

@@ -1,27 +1,29 @@
-platform: template
-sensors:
-- 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 = [] %}
+binary_sensor:
+  - name: tesla_charge_now
+    state: >
+      {% set deadline_raw = states('input_datetime.tesla_charge_deadline') %}
+      {% set deadline_ts = as_timestamp(deadline_raw) if deadline_raw not in ['unknown','unavailable',''] else none %}
 
-    {# 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 %}
+      {% set hours_needed = states('sensor.tesla_charge_hours_needed') | float(0) | round(0, 'ceil') %}
 
-    {# Sorter efter pris #}
-    {% set sorted = valid | sort(attribute='price') %}
+      {% set prices = (state_attr('sensor.energidataservice','today') or [])
+                      + (state_attr('sensor.energidataservice','tomorrow') or []) %}
 
-    {# Vælg de billigste slots der dækker ladetiden #}
-    {% set cheapest = sorted[:hours_needed] %}
+      {# Filter valid price entries and apply deadline #}
+      {% set valid = [] %}
+      {% for p in prices %}
+        {% if p.hour is defined and p.hour %}
+          {% set ts = as_timestamp(p.hour) %}
+          {% if not deadline_ts or ts <= deadline_ts %}
+            {% set valid = valid + [p] %}
+          {% endif %}
+        {% endif %}
+      {% endfor %}
 
-    {# 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 }}
-    
+      {# Pick cheapest hours #}
+      {% set cheapest = (valid | sort(attribute='price'))[:hours_needed] %}
+
+      {# Current hour #}
+      {% set now_slot = now().replace(minute=0, second=0, microsecond=0).isoformat() %}
+
+      {{ cheapest | selectattr('hour','equalto',now_slot) | list | count > 0 }}