mod: improve home screen with adaptive layouts, clock, and set time

- 1-book view: horizontal layout with cover left, title/author right
- 2-3 book view: fix cover stretching by preserving aspect ratio
- 0-book view: show "Choose something to read" placeholder
- Selection highlight now fully contains title and author text
- Add optional clock display in home screen header (AM/PM or 24H)
- Add "Home Screen Clock" setting under Display
- Add "Set Time" activity for manual clock setting via Settings
- Increase homeCoverTileHeight to 310 for title/author breathing room

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

src/activities/settings/SettingsActivity.cpp

@@ -11,6 +11,7 @@
 #include "LanguageSelectActivity.h"
 #include "MappedInputManager.h"
 #include "OtaUpdateActivity.h"
+#include "SetTimeActivity.h"
 #include "SettingsList.h"
 #include "activities/network/WifiSelectionActivity.h"
 #include "components/UITheme.h"
@@ -43,6 +44,7 @@ void SettingsActivity::onEnter() {
   }
 
   // Append device-only ACTION items
+  displaySettings.push_back(SettingInfo::Action(StrId::STR_SET_TIME, SettingAction::SetTime));
   controlsSettings.insert(controlsSettings.begin(),
                           SettingInfo::Action(StrId::STR_REMAP_FRONT_BUTTONS, SettingAction::RemapFrontButtons));
   systemSettings.push_back(SettingInfo::Action(StrId::STR_WIFI_NETWORKS, SettingAction::Network));
@@ -202,6 +204,9 @@ void SettingsActivity::toggleCurrentSetting() {
       case SettingAction::Language:
         enterSubActivity(new LanguageSelectActivity(renderer, mappedInput, onComplete));
         break;
+      case SettingAction::SetTime:
+        enterSubActivity(new SetTimeActivity(renderer, mappedInput, onComplete));
+        break;
       case SettingAction::None:
         // Do nothing
         break;