Fix "Area not found" error

If the card type for the undisclosed area is set to `HaAreaCard`, a card
is shown with the message "Area not found".
This is because it's not a real area and the type must be enforced to
`default`.

Closes #206

src/Registry.ts

@@ -179,8 +179,9 @@ class Registry {
         return { ...area, ...Registry.strategyOptions.areas['_'], ...Registry.strategyOptions.areas?.[area.area_id] };
       });
 
-      // Ensure the custom configuration of the undisclosed area doesn't overwrite the area_id.
+      // Ensure the custom configuration of the undisclosed area doesn't overwrite the required property values.
       Registry.strategyOptions.areas.undisclosed.area_id = 'undisclosed';
+      Registry.strategyOptions.areas.undisclosed.type = 'default';
 
       // Remove hidden areas if configured as so and sort them by name.
 

src/cards/AreaCard.ts

@@ -40,8 +40,8 @@ class AreaCard extends AbstractCard {
       configuration.tap_action.navigation_path = area.area_id;
     }
 
-    // Don't override the default card type if default is set in the strategy options.
+    // Don't override the card type if set differently in the strategy options.
-    if (customConfig && customConfig.type === 'default') {
+    if (customConfig) {
       customConfig = { ...customConfig, type: configuration.type };
     }
 

src/views/HomeView.ts

@@ -229,16 +229,12 @@ class HomeView extends AbstractView {
 
     const cardConfigurations: (TemplateCardConfig | AreaCardConfig)[] = [];
 
-    let onlyDefaultCards = true;
-
     for (const area of Registry.areas) {
       const moduleName =
         Registry.strategyOptions.areas[area.area_id]?.type ?? Registry.strategyOptions.areas['_']?.type ?? 'default';
 
       let AreaCard;
 
-      onlyDefaultCards = onlyDefaultCards && moduleName === 'default';
-
       try {
         AreaCard = (await import(`../cards/${moduleName}`)).default;
       } catch (e) {