Add XCUITest suite with 27 test files covering unmapped P1 test cases

- Add 8 new test files: HeaderMoodLogging (TC-002), DayViewGrouping (TC-019),
  AllDayViewStyles (TC-021), MonthViewInteraction (TC-030), PaywallGate
  (TC-032/039/048), AppTheme (TC-070), IconPack (TC-072),
  PremiumCustomization (TC-075)
- Add accessibility IDs for paywall overlays, icon packs, app theme cards,
  and day view section headers
- Add --expire-trial launch argument to UITestMode for paywall gate testing
- Update QA test plan spreadsheet with XCUITest names for 14 test cases
- Include existing test infrastructure: screen objects, helpers, base class,
  and 19 previously written test files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Tests iOS/EntryDeleteTests.swift

@@ -0,0 +1,53 @@
+//
+//  EntryDeleteTests.swift
+//  Tests iOS
+//
+//  Entry deletion tests.
+//
+
+import XCTest
+
+final class EntryDeleteTests: BaseUITestCase {
+    override var seedFixture: String? { "single_mood" }
+
+    /// TC-025: Delete a mood entry from the detail sheet.
+    func testDeleteEntry_FromDetail() {
+        // Wait for entry to appear
+        let firstEntry = app.descendants(matching: .any)
+            .matching(NSPredicate(format: "identifier BEGINSWITH %@", "entry_row_"))
+            .firstMatch
+
+        guard firstEntry.waitForExistence(timeout: 8) else {
+            XCTFail("No entry row found from seeded data")
+            return
+        }
+
+        firstEntry.tap()
+
+        let detailScreen = EntryDetailScreen(app: app)
+        detailScreen.assertVisible()
+
+        captureScreenshot(name: "entry_detail_before_delete")
+
+        // Delete the entry
+        detailScreen.deleteEntry()
+
+        // Detail should dismiss after delete
+        detailScreen.assertDismissed()
+
+        // The entry should no longer be visible (or empty state should show)
+        // Give UI time to update
+        let moodHeader = app.otherElements["mood_header"]
+        let noDataText = app.staticTexts["empty_state_no_data"]
+
+        let headerReappeared = moodHeader.waitForExistence(timeout: 5)
+        let noDataAppeared = noDataText.waitForExistence(timeout: 2)
+
+        XCTAssertTrue(
+            headerReappeared || noDataAppeared,
+            "After deleting the only entry, mood header or empty state should appear"
+        )
+
+        captureScreenshot(name: "entry_deleted")
+    }
+}