fix(search): drop the open article when the query is cleared

Measure-pass defect in compose ui 1.12.0: layoutChildrenBlock clobbered
the isPlacingForAlignment flag of child nodes during alignment
placement, so sheet anchors were recalculated from a stale content size.

compose ui 1.12.1 preserves and restores child placement flags, so the
anchor is computed from a consistent content size on the first frame.

app/src/main/java/com/example/research/feature/search/SearchViewModel.kt

@@ -122,6 +122,7 @@ class SearchViewModel(
             SearchAction.ClearQuery -> {
                 mutableSearchQuery.value = ""
                 savedStateHandle[KEY_SEARCH_QUERY] = ""
+                clearArticle()
             }
             is SearchAction.ArticleClicked -> {
                 articleHistory.clear()
@@ -136,6 +137,9 @@ class SearchViewModel(
     fun onSearchQueryChanged(query: String) {
         val sanitized = query.sanitizeQuery().trim()
         mutableSearchQuery.value = sanitized
+        if (sanitized.isBlank()) {
+            clearArticle()
+        }
         // Debounce SavedStateHandle writes to reduce disk I/O
         debounceSaveQueryJob?.cancel()
         debounceSaveQueryJob = viewModelScope.launch {

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 aboutlibraries = "15.2.0"
 activity_compose = "1.13.0"
 agp = "9.3.1"
-compose_bom = "2026.08.00"
+compose_bom = "2026.09.00"
 core = "1.19.0"
 datastore_preferences = "1.2.1"
 documentfile = "1.1.0"