Close, reopen, and delete issues on iPhone

TESTING.md

@@ -173,7 +173,8 @@ xcrun simctl launch booted de.rfc1437.gotcha
       returns every filter icon to neutral.
 - [ ] Tap the add button. **New Issue** appears as a native modal with Cancel
       and Save, title and Markdown body fields, multi-select labels, a
-      single-select optional milestone, and an optional inline due-date picker.
+      single-select optional milestone, a **Closed** switch that defaults off,
+      and an optional inline due-date picker.
 - [ ] In the new-issue body, enter headings, emphasis, a list, a link, and a
       fenced code block. **Write** syntax-highlights the Markdown and **Preview**
       renders it; switching repeatedly preserves the exact source text.
@@ -182,7 +183,13 @@ xcrun simctl launch booted de.rfc1437.gotcha
       due date; each new issue appears in the list and opens its detail.
 - [ ] Tap the pencil button on an issue. Change its title and Markdown body, replace and
       clear labels, select and clear its milestone, and add, change, and remove
-      its due date. Save, refresh, and relaunch to verify every change persists.
+      its due date. Turn **Closed** on and save, then edit it again and turn
+      **Closed** off. Save, refresh, and relaunch to verify every change persists.
+- [ ] In the issue list, partially swipe an open issue to reveal **Close** and
+      **Delete**. Cancel the destructive Delete confirmation and verify nothing
+      changes. Full-swipe the same row to close it, switch to Closed issues, and
+      full-swipe it again to reopen it; each row leaves the current filtered list
+      only after the server mutation succeeds.
 - [ ] Cancel both new and edited issues, including with the keyboard and date
       picker visible. Nothing is saved, the modal dismisses normally, and the
       issue list/detail remains usable with Dynamic Type and VoiceOver labels.