Refresh also habit/battery statistics on changes on overview pages (references #26)

migrations/0033.sql

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+DROP VIEW habits_current;
+CREATE VIEW habits_current
+AS
+SELECT
+	h.id AS habit_id,
+	MAX(l.tracked_time) AS last_tracked_time,
+	CASE h.period_type
+		WHEN 'manually' THEN '2999-12-31 23:59:59'
+		WHEN 'dynamic-regular' THEN datetime(MAX(l.tracked_time), '+' || CAST(h.period_days AS TEXT) || ' day')
+	END AS next_estimated_execution_time
+FROM habits h
+LEFT JOIN habits_log l
+	ON h.id = l.habit_id
+GROUP BY h.id, h.period_days;
+
+DROP VIEW batteries_current;
+CREATE VIEW batteries_current
+AS
+SELECT
+	b.id AS battery_id,
+	MAX(l.tracked_time) AS last_tracked_time,
+	CASE WHEN b.charge_interval_days = 0
+		THEN '2999-12-31 23:59:59'
+		ELSE datetime(MAX(l.tracked_time), '+' || CAST(b.charge_interval_days AS TEXT) || ' day')
+	END AS next_estimated_charge_time
+FROM batteries b
+LEFT JOIN battery_charge_cycles l
+	ON b.id = l.battery_id
+GROUP BY b.id, b.charge_interval_days;