refactor(AGENTS.md): update docs for simplified build commands and board config

libraries/KlubhausCore/src/DisplayManager.h

@@ -166,7 +166,7 @@ public:
         _drv->transformTouch(&dx, &dy);
         _drv->transformTouch(&cx, &cy);
 
-        int headerH = 30;
+        int headerH = _headerHeight;
         int cellW = _drv->width() / _gridCols;
         int cellH = (_drv->height() - headerH) / _gridRows;
 
@@ -184,6 +184,8 @@ public:
     /// Handle dashboard touch - returns action for tapped tile, or NONE
     TileAction handleDashboardTouch(int x, int y) const {
         HitResult hr = hitTest(x, y);
+        Serial.printf("[HIT] x=%d y=%d type=%d idx=%d _headerHeight=%d\n", x, y, (int)hr.type,
+            hr.index, _headerHeight);
         if(hr.type == UIElementType::TILE && hr.index >= 0 && hr.index < DASHBOARD_TILE_COUNT) {
             return DASHBOARD_TILES[hr.index].action;
         }