feat: watch issues from mobile search (Closes #1290)

tests/e2e/test_mobile_search_preview_navigation.py

@@ -32,8 +32,14 @@ def test_rendered_mobile_search_preview_navigation_preserves_reading_space_and_d
         page.locator("#search-preview-conversation").evaluate("node => node.style.minHeight = '500px'")
         page.locator("#search-preview-reply-workspace").evaluate("node => node.style.minHeight = '500px'")
         page.locator("#search-preview-actions").evaluate("node => node.style.minHeight = '300px'")
+        page.locator("#watch-search-result").evaluate("node => { node.hidden = false; node.textContent = 'Watch issue'; }")
         page.add_script_tag(path=FRONTEND / "mobile-search-preview-nav.js")
 
+        watch = page.locator("#watch-search-result")
+        expect(watch).to_be_visible()
+        expect(watch).to_have_text("Watch issue")
+        watch_bounds = watch.bounding_box()
+        assert watch_bounds and watch_bounds["height"] >= 44
         navigation = page.locator(".mobile-search-preview-nav")
         expect(navigation).to_be_visible()
         buttons = navigation.locator("button")