Rules can leave a manual pick alone, Clock is an editable page, fix HA attributes

- Rules: "also over a page chosen by hand" (on by default); off, a rule
  waits until the manual pick ends. Schedule store version 3, version 2
  records are read with the option on.
- The Clock page is stored at boot from the built-in one and can be
  edited; Reset (deleting it) brings back the original.
- Home Assistant attributes were never found: ArduinoJson 7.4 takes a
  char array key as a literal of its full array length.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/test_esp32/test_main.cpp

@@ -1841,6 +1841,37 @@ void test_selector_take_over_rules()
 	TEST_ASSERT_TRUE(c.instant);               // a rule's page leaves at once
 }
 
+void test_selector_rule_can_leave_a_manual_pick_alone()
+{
+	PageSchedule s = twoBlocks(); // 07:00 Weer + Datum, 17:00 Energie
+	s.rule_count = 2;
+	s.rules[0] = rule("3D printer", TriggerMode::WhileTrue);
+	s.rules[0].over_manual = false;
+	s.rules[1] = rule("Deurbel", TriggerMode::AddToRotation, 10);
+	s.rules[1].over_manual = false;
+	PageSelector sel;
+	sel.setSchedule(&s);
+	sel.update(8 * 60, 0);
+	sel.setRuleState(0, true, 0);
+	TEST_ASSERT_EQUAL_STRING("3D printer", sel.update(8 * 60, 0).page); // no pick: it takes over
+
+	sel.pick("Clock");
+	PageChoice c = sel.update(8 * 60, 1000);
+	TEST_ASSERT_EQUAL_STRING("Clock", c.page); // waits while the pick lasts
+	TEST_ASSERT_TRUE(c.reason == ShowReason::Chosen);
+	sel.setRuleState(1, true, 1000);
+	for (uint32_t t = 1000; t < 120000; t += 5000)
+		TEST_ASSERT_EQUAL_STRING("Clock", sel.update(8 * 60, t).page); // not in the rotation either
+
+	sel.backToSchedule();
+	TEST_ASSERT_EQUAL_STRING("3D printer", sel.update(8 * 60, 121000).page);
+
+	// The next block ends a pick too
+	sel.pick("Clock");
+	TEST_ASSERT_EQUAL_STRING("Clock", sel.update(16 * 60, 122000).page);
+	TEST_ASSERT_EQUAL_STRING("3D printer", sel.update(17 * 60, 123000).page);
+}
+
 void test_selector_rules_only_in_their_blocks()
 {
 	PageSchedule s = twoBlocks(); // 07:00 Weer + Datum, 17:00 Energie
@@ -2415,6 +2446,7 @@ int main()
 	RUN_TEST(test_selector_one_block_starts_again_each_day);
 	RUN_TEST(test_selector_take_over_rules);
 	RUN_TEST(test_selector_rules_only_in_their_blocks);
+	RUN_TEST(test_selector_rule_can_leave_a_manual_pick_alone);
 	RUN_TEST(test_selector_add_to_rotation);
 	RUN_TEST(test_ha_auto_unit_and_absolute);
 	RUN_TEST(test_ha_duration);