Add Tab and Cover touch kinds to TouchRegistry

Extends the Kind enum with two new touch interaction types: Tab (2) and Cover (3), enabling support for additional UI element touch handling.

src/components/TouchRegistry.h

@@ -19,7 +19,7 @@
 // so add()/hitTest() are a single branch on the C3.
 class TouchRegistry {
  public:
-  enum Kind : uint8_t { Item = 0, Back = 1 };
+  enum Kind : uint8_t { Item = 0, Back = 1, Tab = 2, Cover = 3 };
 
   static TouchRegistry& getInstance();
 
@@ -36,7 +36,7 @@ class TouchRegistry {
   bool hitTest(int x, int y, Kind kind, int& outId) const;
 
  private:
-  static constexpr size_t CAPACITY = 48;  // worst case excl. keyboard grid (Phase 2)
+  static constexpr size_t CAPACITY = 64;  // worst case is the keyboard grid (~45 keys)
 
   struct Target {
     Rect rect;

src/components/themes/BaseTheme.cpp

@@ -419,10 +419,16 @@ void BaseTheme::drawTabBar(const GfxRenderer& renderer, const Rect rect, const s
 
   int currentX = rect.x + BaseMetrics::values.contentSidePadding;
 
+  int tabIndex = 0;
   for (const auto& tab : tabs) {
     const int textWidth =
         renderer.getTextWidth(UI_12_FONT_ID, tab.label, tab.selected ? EpdFontFamily::BOLD : EpdFontFamily::REGULAR);
 
+    // Tap target spans the label plus the inter-tab gap, full bar height.
+    TouchRegistry::getInstance().add(
+        Rect{currentX - 3, rect.y, textWidth + BaseMetrics::values.tabSpacing, rect.height}, tabIndex++,
+        TouchRegistry::Tab);
+
     // Draw underline for selected tab
     if (tab.selected) {
       if (selected) {
@@ -495,6 +501,11 @@ void BaseTheme::drawRecentBookCover(GfxRenderer& renderer, Rect rect, const std:
   const int bookY = rect.y;
   const int bookHeight = baseHeight;
 
+  // Tapping the continue-reading cover opens recentBooks[0] (home selector 0).
+  if (hasContinueReading) {
+    TouchRegistry::getInstance().add(Rect{bookX, bookY, bookWidth, bookHeight}, 0, TouchRegistry::Cover);
+  }
+
   // Bookmark dimensions (used in multiple places)
   const int bookmarkWidth = bookWidth / 8;
   const int bookmarkHeight = bookHeight / 5;

src/components/themes/lyra/LyraTheme.cpp

@@ -183,9 +183,14 @@ void LyraTheme::drawTabBar(const GfxRenderer& renderer, Rect rect, const std::ve
     renderer.fillRectDither(rect.x, rect.y, rect.width, rect.height, Color::LightGray);
   }
 
+  int tabIndex = 0;
   for (const auto& tab : tabs) {
     const int textWidth = renderer.getTextWidth(UI_10_FONT_ID, tab.label, EpdFontFamily::REGULAR);
 
+    TouchRegistry::getInstance().add(
+        Rect{currentX, rect.y, textWidth + 2 * hPaddingInSelection + LyraMetrics::values.tabSpacing, rect.height},
+        tabIndex++, TouchRegistry::Tab);
+
     if (tab.selected) {
       if (selected) {
         renderer.fillRoundedRect(currentX, rect.y + 1, textWidth + 2 * hPaddingInSelection, rect.height - 4,
@@ -419,6 +424,14 @@ void LyraTheme::drawRecentBookCover(GfxRenderer& renderer, Rect rect, const std:
     coverWidth = LyraMetrics::values.homeCoverHeight * 0.6;
   }
 
+  // Tapping the continue-reading cover opens recentBooks[0] (home selector 0).
+  if (hasContinueReading) {
+    TouchRegistry::getInstance().add(
+        Rect{LyraMetrics::values.contentSidePadding, tileY, coverWidth + 2 * hPaddingInSelection,
+             LyraMetrics::values.homeCoverHeight + 2 * hPaddingInSelection},
+        0, TouchRegistry::Cover);
+  }
+
   // Draw book card regardless, fill with message based on `hasContinueReading`
   // Draw cover image as background if available (inside the box)
   // Only load from SD on first render, then use stored buffer

src/components/themes/roundedraff/RoundedRaffTheme.cpp

@@ -99,6 +99,9 @@ void RoundedRaffTheme::drawTabBar(const GfxRenderer& renderer, Rect rect, const
     const int tabWidth = slotWidth - 8;
     const auto& tab = tabs[i];
 
+    TouchRegistry::getInstance().add(Rect{slotX, rect.y, slotWidth, rect.height}, static_cast<int>(i),
+                                     TouchRegistry::Tab);
+
     if (tab.selected) {
       renderer.fillRoundedRect(tabX, tabY, tabWidth, tabHeight, 18, selected ? Color::Black : Color::DarkGray);
     }
@@ -126,6 +129,13 @@ void RoundedRaffTheme::drawRecentBookCover(GfxRenderer& renderer, Rect rect, con
   const int imgY = tileY + (tileHeight - RoundedRaffMetrics::values.homeCoverHeight) / 2;
   const int tileX = RoundedRaffMetrics::values.contentSidePadding;
 
+  // Tapping the continue-reading cover opens recentBooks[0] (home selector 0).
+  if (hasContinueReading) {
+    TouchRegistry::getInstance().add(
+        Rect{tileX + (tileWidth - coverWidth) / 2, imgY, coverWidth, RoundedRaffMetrics::values.homeCoverHeight}, 0,
+        TouchRegistry::Cover);
+  }
+
   // Draw book card regardless, fill with message based on `hasContinueReading`
   // Draw cover image as background if available (inside the box)
   // Only load from SD on first render, then use stored buffer