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.

appinfo/info.xml

@@ -4,31 +4,37 @@
     <id>workflow_deck_automation</id>
     <name lang="de">Deck Workflow-Automatisierung</name>
     <name lang="en">Deck Workflow Automation</name>
-    <summary lang="de">Verschiebt überfällige Deck-Karten automatisch anhand konfigurierbarer Regeln</summary>
-    <summary lang="en">Automatically moves overdue Deck cards based on configurable rules</summary>
+    <summary lang="de">Verschiebt Deck-Karten automatisch anhand konfigurierbarer Regeln</summary>
+    <summary lang="en">Automatically moves Deck cards based on configurable rules</summary>
     <description lang="de"><![CDATA[
 Diese App erlaubt es jedem Nutzer, in den persönlichen Einstellungen eigene Automatisierungs-Workflows für die Deck-App anzulegen:
 
 * Quell-Board und Quell-Stapel wählen
-* Ziel-Stapel wählen, in den überfällige Karten verschoben werden
+* Ziel-Stapel wählen, in den die Karten verschoben werden
+* je Regel wählen, ob das Fälligkeits- oder das Startdatum der Karte ausgewertet wird
 * optional nach zugewiesenen Benutzern filtern
 * optional nach Labels/Tags filtern
 * optional eine E-Mail-Benachrichtigung an sich selbst aktivieren
 
-Ein Hintergrundjob prüft regelmäßig alle aktiven Workflows und verschiebt Karten, deren Fälligkeitsdatum überschritten wurde, ausschließlich über die internen PHP-Klassen der Deck-App (keine HTTP/OCS-Aufrufe).
+Ein Hintergrundjob prüft regelmäßig alle aktiven Workflows und verschiebt Karten, deren gewähltes Datum in der Vergangenheit liegt, ausschließlich über die internen PHP-Klassen der Deck-App (keine HTTP/OCS-Aufrufe).
+
+Voraussetzung: Nextcloud 34 und die Deck-App ab Version 1.18.0 – die einzige Deck-Reihe, die für Nextcloud 34 freigegeben ist.
 ]]></description>
     <description lang="en"><![CDATA[
 This app lets every user configure their own Deck automation workflows from Personal settings:
 
 * pick a source board and source stack
-* pick a destination stack overdue cards get moved to
+* pick a destination stack the cards get moved to
+* pick, per rule, whether the card's due date or its start date is evaluated
 * optionally filter by assigned users
 * optionally filter by labels/tags
 * optionally enable an email notification to themselves
 
-A background job periodically evaluates all enabled workflows and moves cards whose due date has passed, using Deck's own internal PHP classes only (no HTTP/OCS calls).
+A background job periodically evaluates all enabled workflows and moves cards whose chosen date lies in the past, using Deck's own internal PHP classes only (no HTTP/OCS calls).
+
+Requires Nextcloud 34 and Deck 1.18.0 or newer - the only Deck release line supported on Nextcloud 34.
 ]]></description>
-    <version>34.0.2</version>
+    <version>34.1.0</version>
     <licence>agpl</licence>
     <author mail="patrick@niebel.ing">Patrick Niebeling</author>
     <namespace>WorkflowDeckAutomation</namespace>