Let each workflow watch the due date or the start date

Deck 1.18 added a start date to cards (Card::$startdate), so a workflow
no longer has to mean "overdue". Each rule now carries a date_field
('due' | 'start'), chosen in the settings form next to board and stacks.

Existing rules keep the due date: the new column's default supplies it
for every stored row, so there is no backfill step, and
Workflow::getDateFieldOrDue() covers entities that were never near the
database as well as hand-edited values. The controller is the one place
that rejects an unknown value instead of normalising it - a client
asking for a rule it would not get should hear about it.

The probe for the field is property_exists(), not method_exists():
Deck's entities declare no getter as real code - getStartdate(),
getDuedate(), even getId() all go through Entity::__call(), which
method_exists() ignores by definition. A method_exists() guard would
have been false on every Deck version and would have turned every
start-date rule into a silent no-op.

assertDeckAvailable() now also refuses Deck older than 1.18.0. That
floor cannot live in appinfo/info.xml - neither the server's nor the app
store's schema has an app-to-app dependency element - but
<nextcloud min-version="34"> already implies it, since 1.18.x is the
only Deck release line published for Nextcloud 34.

isOverdue() becomes hasPassed(): one function for both dates, since the
comparison and the argument against Deck's day-truncating
getDaysUntilDue() are identical for either.

Also carries a pending NcSelect icon-alignment fix that was already in
the working tree.

Bump to 34.1.0.

tests/Unit/Service/WorkflowRunnerFilterTest.php

@@ -9,30 +9,30 @@ use OCA\WorkflowDeckAutomation\Service\WorkflowRunner;
 use PHPUnit\Framework\TestCase;
 
 class WorkflowRunnerFilterTest extends TestCase {
-	public function testIsOverdueReturnsFalseWithoutDueDate(): void {
-		$this->assertFalse(WorkflowRunner::isOverdue(null, new DateTimeImmutable('2026-01-15 12:00:00')));
+	public function testHasPassedReturnsFalseWithoutADate(): void {
+		$this->assertFalse(WorkflowRunner::hasPassed(null, new DateTimeImmutable('2026-01-15 12:00:00')));
 	}
 
-	public function testIsOverdueReturnsFalseForFutureDueDate(): void {
+	public function testHasPassedReturnsFalseForAFutureDate(): void {
 		$now = new DateTimeImmutable('2026-01-15 12:00:00');
-		$this->assertFalse(WorkflowRunner::isOverdue($now->modify('+1 hour'), $now));
-		$this->assertFalse(WorkflowRunner::isOverdue($now->modify('+3 days'), $now));
+		$this->assertFalse(WorkflowRunner::hasPassed($now->modify('+1 hour'), $now));
+		$this->assertFalse(WorkflowRunner::hasPassed($now->modify('+3 days'), $now));
 	}
 
-	public function testIsOverdueReturnsTrueForPastDueDate(): void {
+	public function testHasPassedReturnsTrueForAPastDate(): void {
 		$now = new DateTimeImmutable('2026-01-15 12:00:00');
-		$this->assertTrue(WorkflowRunner::isOverdue($now->modify('-1 hour'), $now));
-		$this->assertTrue(WorkflowRunner::isOverdue($now->modify('-30 days'), $now));
+		$this->assertTrue(WorkflowRunner::hasPassed($now->modify('-1 hour'), $now));
+		$this->assertTrue(WorkflowRunner::hasPassed($now->modify('-30 days'), $now));
 	}
 
-	public function testIsOverdueReturnsTrueForADueTimeEarlierTheSameDay(): void {
+	public function testHasPassedReturnsTrueForATimeEarlierTheSameDay(): void {
 		// Regression: comparing whole calendar days (as Deck's own
 		// Card::getDaysUntilDue() does) reports a card due earlier today as
 		// "0 days until due", not overdue, until the calendar date rolls
 		// over - holding every card back for up to 24h after it actually
-		// fell due. isOverdue() must compare the real timestamps instead.
+		// fell due. hasPassed() must compare the real timestamps instead.
 		$now = new DateTimeImmutable('2026-01-15 12:00:00');
-		$this->assertTrue(WorkflowRunner::isOverdue(new DateTimeImmutable('2026-01-15 06:00:00'), $now));
+		$this->assertTrue(WorkflowRunner::hasPassed(new DateTimeImmutable('2026-01-15 06:00:00'), $now));
 	}
 
 	public function testNoFiltersMatchesAnyCard(): void {