Add 4 passing UI tests (batch 8): sharing template rendering

- TC-111: Year share Gradient template renders in SharingStylePickerView
- TC-112: Year share Color Block template renders after swipe
- TC-116: Month share Clean Calendar template renders
- TC-117: Month share Stacked Bars template renders after swipe

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

Tests iOS/MonthShareTemplateTests.swift

@@ -0,0 +1,88 @@
+//
+//  MonthShareTemplateTests.swift
+//  Tests iOS
+//
+//  TC-116: This Month - Clean Calendar sharing template renders.
+//  TC-117: This Month - Stacked Bars sharing template renders.
+//
+
+import XCTest
+
+final class MonthShareTemplateTests: BaseUITestCase {
+    override var seedFixture: String? { "week_of_moods" }
+    override var bypassSubscription: Bool { true }
+
+    /// TC-116: Tap Month share button → verify Clean Calendar design renders.
+    func testMonthShare_CleanCalendarTemplate_Renders() {
+        let tabBar = TabBarScreen(app: app)
+        tabBar.tapMonth()
+
+        // Wait for month view to load
+        _ = app.waitForExistence(timeout: 3)
+
+        // Find the month share button
+        let shareButton = app.element(UITestID.Month.shareButton)
+        XCTAssertTrue(
+            shareButton.waitForExistence(timeout: 8),
+            "Month share button should exist"
+        )
+
+        shareButton.tapWhenReady()
+
+        // Verify the SharingStylePickerView sheet appears
+        let exitButton = app.buttons["Exit"].firstMatch
+        XCTAssertTrue(
+            exitButton.waitForExistence(timeout: 5),
+            "Sharing picker Exit button should appear"
+        )
+
+        // First design should be "Clean Calendar"
+        let cleanCalendarLabel = app.staticTexts["Clean Calendar"].firstMatch
+        XCTAssertTrue(
+            cleanCalendarLabel.waitForExistence(timeout: 5),
+            "Clean Calendar design label should be visible"
+        )
+
+        captureScreenshot(name: "month_share_clean_calendar")
+
+        // Close the picker
+        exitButton.tap()
+    }
+
+    /// TC-117: Swipe to second design → verify Stacked Bars design renders.
+    func testMonthShare_StackedBarsTemplate_Renders() {
+        let tabBar = TabBarScreen(app: app)
+        tabBar.tapMonth()
+
+        _ = app.waitForExistence(timeout: 3)
+
+        let shareButton = app.element(UITestID.Month.shareButton)
+        XCTAssertTrue(
+            shareButton.waitForExistence(timeout: 8),
+            "Month share button should exist"
+        )
+
+        shareButton.tapWhenReady()
+
+        let exitButton = app.buttons["Exit"].firstMatch
+        XCTAssertTrue(
+            exitButton.waitForExistence(timeout: 5),
+            "Sharing picker Exit button should appear"
+        )
+
+        // Swipe left to get to the "Stacked Bars" design
+        app.swipeLeft()
+        _ = app.waitForExistence(timeout: 1)
+
+        let stackedBarsLabel = app.staticTexts["Stacked Bars"].firstMatch
+        XCTAssertTrue(
+            stackedBarsLabel.waitForExistence(timeout: 5),
+            "Stacked Bars design label should be visible after swiping"
+        )
+
+        captureScreenshot(name: "month_share_stacked_bars")
+
+        // Close the picker
+        exitButton.tap()
+    }
+}