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/settings/NtpSyncActivity.cpp

@@ -5,9 +5,9 @@
 #include <Logging.h>
 #include <WiFi.h>
 
-#include "activities/ActivityResult.h"
 #include "CrossPointSettings.h"
 #include "MappedInputManager.h"
+#include "activities/ActivityResult.h"
 #include "activities/network/WifiSelectionActivity.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
@@ -57,12 +57,11 @@ void NtpSyncActivity::onEnter() {
   WiFi.mode(WIFI_STA);
 
   LOG_DBG("NTP", "Launching WifiSelectionActivity...");
-  startActivityForResult(
-      std::make_unique<WifiSelectionActivity>(renderer, mappedInput),
-      [this](const ActivityResult& result) {
-        const bool success = !result.isCancelled && std::holds_alternative<WifiResult>(result.data);
-        onWifiSelectionComplete(success);
-      });
+  startActivityForResult(std::make_unique<WifiSelectionActivity>(renderer, mappedInput),
+                         [this](const ActivityResult& result) {
+                           const bool success = !result.isCancelled && std::holds_alternative<WifiResult>(result.data);
+                           onWifiSelectionComplete(success);
+                         });
 }
 
 void NtpSyncActivity::onExit() {