feat(offline-first): persist hijri+unsplash cache and scale secondary times

lib/features/home/main_screen.dart

@@ -537,6 +537,8 @@ class MainScreen extends ConsumerWidget {
       items.add(_SecondaryTimeItem('Terbit', schedule.terbit));
     }
     items.add(_SecondaryTimeItem('Dhuha', schedule.dhuha));
+    final labelScale = settings.scaleCardLabel;
+    final bodyScale = settings.scaleCardBody;
 
     return Row(
       mainAxisSize: MainAxisSize.min,
@@ -547,17 +549,19 @@ class MainScreen extends ConsumerWidget {
               Text(
                 items[i].label.toUpperCase(),
                 style: GoogleFonts.manrope(
-                  fontSize: 10 * fs,
+                  // Keep hierarchy smaller than bottom prayer cards, but follow the same scale percentage.
+                  fontSize: 10 * fs * labelScale,
                   fontWeight: FontWeight.w700,
                   color: SacredColors.onSurfaceVariant,
                   letterSpacing: 3 * s,
                 ),
               ),
-              SizedBox(height: 4 * s),
+              SizedBox(height: 4 * s * bodyScale),
               Text(
                 items[i].time,
                 style: GoogleFonts.plusJakartaSans(
-                  fontSize: 28 * fs,
+                  // Keep hierarchy smaller than bottom prayer cards, but follow the same scale percentage.
+                  fontSize: 28 * fs * bodyScale,
                   fontWeight: FontWeight.w600,
                   color: SacredColors.onSurface,
                 ),
@@ -569,7 +573,7 @@ class MainScreen extends ConsumerWidget {
               padding: EdgeInsets.symmetric(horizontal: 24 * s),
               child: Container(
                   width: 1,
-                  height: 40 * s,
+                  height: 40 * s * bodyScale,
                   color: SacredColors.outlineVariant.withValues(alpha: 0.3)),
             ),
           ],