fix(schedule): hot-reload config in schedule/dim checks + normalize per-day mode variant (#266)

* fix(web): handle string boolean values in schedule-picker widget

The normalizeSchedule function used strict equality (===) to check the
enabled field, which would fail if the config value was a string "true"
instead of boolean true. This could cause the checkbox to always appear
unchecked even when the setting was enabled.

Added coerceToBoolean helper that properly handles:
- Boolean true/false (returns as-is)
- String "true", "1", "on" (case-insensitive) → true
- String "false" or other values → false

Applied to both main schedule enabled and per-day enabled fields.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: trim whitespace in coerceToBoolean string handling

* fix: normalize mode value to handle per_day and per-day variants

* fix: use hot-reload config for schedule and dim schedule checks

The display controller was caching the config at startup and not picking
up changes made via the web UI. Now _check_schedule and _check_dim_schedule
read from config_service.get_config() to get the latest configuration,
allowing schedule changes to take effect without restarting the service.

---------

Co-authored-by: Chuck <chuck@example.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src/display_controller.py

@@ -436,14 +436,17 @@ class DisplayController:
 
     def _check_schedule(self):
         """Check if display should be active based on schedule."""
-        schedule_config = self.config.get('schedule', {})
-        
+        # Get fresh config from config_service to support hot-reload
+        current_config = self.config_service.get_config()
+
+        schedule_config = current_config.get('schedule', {})
+
         # If schedule config doesn't exist or is empty, default to always active
         if not schedule_config:
             self.is_display_active = True
             self._was_display_active = True  # Track previous state for schedule change detection
             return
-        
+
         # Check if schedule is explicitly disabled
         # Default to True (schedule enabled) if 'enabled' key is missing for backward compatibility
         if 'enabled' in schedule_config and not schedule_config.get('enabled', True):
@@ -453,7 +456,7 @@ class DisplayController:
             return
 
         # Get configured timezone, default to UTC
-        timezone_str = self.config.get('timezone', 'UTC')
+        timezone_str = current_config.get('timezone', 'UTC')
         try:
             tz = pytz.timezone(timezone_str)
         except pytz.UnknownTimeZoneError:
@@ -551,15 +554,18 @@ class DisplayController:
             Target brightness level (dim_brightness if in dim period,
             normal brightness otherwise)
         """
+        # Get fresh config from config_service to support hot-reload
+        current_config = self.config_service.get_config()
+
         # Get normal brightness from config
-        normal_brightness = self.config.get('display', {}).get('hardware', {}).get('brightness', 90)
+        normal_brightness = current_config.get('display', {}).get('hardware', {}).get('brightness', 90)
 
         # If display is OFF via schedule, don't process dim schedule
         if not self.is_display_active:
             self.is_dimmed = False
             return normal_brightness
 
-        dim_config = self.config.get('dim_schedule', {})
+        dim_config = current_config.get('dim_schedule', {})
 
         # If dim schedule doesn't exist or is disabled, use normal brightness
         if not dim_config or not dim_config.get('enabled', False):
@@ -567,7 +573,7 @@ class DisplayController:
             return normal_brightness
 
         # Get configured timezone
-        timezone_str = self.config.get('timezone', 'UTC')
+        timezone_str = current_config.get('timezone', 'UTC')
         try:
             tz = pytz.timezone(timezone_str)
         except pytz.UnknownTimeZoneError: