fix: ClearCacheActivity now clears txt_* caches and recents list

Add txt_* prefix to the directory check so TXT book caches are also
removed. After clearing all cache directories, call RECENT_BOOKS.clear()
to remove stale entries that would show missing covers on the home screen.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/activities/settings/ClearCacheActivity.cpp

@@ -6,6 +6,7 @@
 #include <Logging.h>
 
 #include "MappedInputManager.h"
+#include "RecentBooksStore.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
 
@@ -94,8 +95,8 @@ void ClearCacheActivity::clearCache() {
     file.getName(name, sizeof(name));
     String itemName(name);
 
-    // Only delete directories starting with epub_ or xtc_
-    if (file.isDirectory() && (itemName.startsWith("epub_") || itemName.startsWith("xtc_"))) {
+    if (file.isDirectory() &&
+        (itemName.startsWith("epub_") || itemName.startsWith("xtc_") || itemName.startsWith("txt_"))) {
       String fullPath = "/.crosspoint/" + itemName;
       LOG_DBG("CLEAR_CACHE", "Removing cache: %s", fullPath.c_str());
 
@@ -113,6 +114,9 @@ void ClearCacheActivity::clearCache() {
   }
   root.close();
 
+  // Clear recents since all cached data (covers, progress) is gone
+  RECENT_BOOKS.clear();
+
   LOG_DBG("CLEAR_CACHE", "Cache cleared: %d removed, %d failed", clearedCount, failedCount);
 
   state = SUCCESS;