port: upstream PR #1342 - Book Info screen, richer metadata, safer controls

Ports upstream PR #1342 (feat: Add Book Info screen, richer metadata,
and safer file-browser controls) with mod-specific adaptations:

- Parse and cache series, seriesIndex, description from EPUB OPF
- Bump book.bin cache version to 6 for new metadata fields
- Add BookInfoActivity (new screen) accessible via Right button in FileBrowser
- Add ManageBook menu via Left button in FileBrowser (replaces upstream hidden delete)
- Guard all delete/archive actions with ConfirmationActivity (10 call sites)
- Add inputArmed gating to ConfirmationActivity to prevent accidental confirmation
- Safe deserialization: readString now returns bool with MAX_STRING_LENGTH guard
- Add series field to RecentBooksStore with JSON and binary serialization
- Add i18n keys: STR_BOOK_INFO, STR_AUTHOR, STR_SERIES, STR_FILE_SIZE, etc.

Made-with: Cursor

src/activities/reader/DictionaryDefinitionActivity.cpp

@@ -3,13 +3,12 @@
 #include <GfxRenderer.h>
 
 #include <algorithm>
-
-#include "activities/ActivityResult.h"
 #include <cctype>
 #include <cstdlib>
 
 #include "CrossPointSettings.h"
 #include "MappedInputManager.h"
+#include "activities/ActivityResult.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
 
@@ -478,7 +477,8 @@ void DictionaryDefinitionActivity::render(RenderLock&&) {
   }
 
   // Button hints (bottom face buttons)
-  const auto labels = mappedInput.mapLabels("\xC2\xAB Back", hasDoneButton ? "Done" : "", "\xC2\xAB Page", "Page \xC2\xBB");
+  const auto labels =
+      mappedInput.mapLabels("\xC2\xAB Back", hasDoneButton ? "Done" : "", "\xC2\xAB Page", "Page \xC2\xBB");
   GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
 
   // Side button hints (drawn in portrait coordinates for correct placement)