Make residence address fields optional (only name required)

Updated Kotlin models, Android UI, and iOS UI to make all address fields
optional for residences. Only the residence name is now required.

Changes:
- Kotlin: Made propertyType, streetAddress, city, stateProvince, postalCode,
  country nullable in Residence, ResidenceSummary, ResidenceWithTasks models
- Kotlin: Updated navigation routes to handle nullable address fields
- Android: Updated ResidenceFormScreen and ResidenceDetailScreen to handle nulls
- iOS: Updated ResidenceFormView validation to only check name field
- iOS: Updated PropertyHeaderCard and ResidenceCard to use optional binding
  for address field displays

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

composeApp/src/commonMain/kotlin/com/example/mycrib/models/Residence.kt

@@ -11,21 +11,21 @@ data class Residence(
     @SerialName("is_primary_owner") val isPrimaryOwner: Boolean = false,
     @SerialName("user_count") val userCount: Int = 1,
     val name: String,
-    @SerialName("property_type") val propertyType: String,
-    @SerialName("street_address") val streetAddress: String,
-    @SerialName("apartment_unit") val apartmentUnit: String?,
-    val city: String,
-    @SerialName("state_province") val stateProvince: String,
-    @SerialName("postal_code") val postalCode: String,
-    val country: String,
-    val bedrooms: Int?,
-    val bathrooms: Float?,
-    @SerialName("square_footage") val squareFootage: Int?,
-    @SerialName("lot_size") val lotSize: Float?,
-    @SerialName("year_built") val yearBuilt: Int?,
-    val description: String?,
-    @SerialName("purchase_date") val purchaseDate: String?,
-    @SerialName("purchase_price") val purchasePrice: Double?,
+    @SerialName("property_type") val propertyType: String? = null,
+    @SerialName("street_address") val streetAddress: String? = null,
+    @SerialName("apartment_unit") val apartmentUnit: String? = null,
+    val city: String? = null,
+    @SerialName("state_province") val stateProvince: String? = null,
+    @SerialName("postal_code") val postalCode: String? = null,
+    val country: String? = null,
+    val bedrooms: Int? = null,
+    val bathrooms: Float? = null,
+    @SerialName("square_footage") val squareFootage: Int? = null,
+    @SerialName("lot_size") val lotSize: Float? = null,
+    @SerialName("year_built") val yearBuilt: Int? = null,
+    val description: String? = null,
+    @SerialName("purchase_date") val purchaseDate: String? = null,
+    @SerialName("purchase_price") val purchasePrice: Double? = null,
     @SerialName("is_primary") val isPrimary: Boolean = false,
     @SerialName("created_at") val createdAt: String,
     @SerialName("updated_at") val updatedAt: String
@@ -34,13 +34,13 @@ data class Residence(
 @Serializable
 data class ResidenceCreateRequest(
     val name: String,
-    @SerialName("property_type") val propertyType: Int,
-    @SerialName("street_address") val streetAddress: String,
+    @SerialName("property_type") val propertyType: Int? = null,
+    @SerialName("street_address") val streetAddress: String? = null,
     @SerialName("apartment_unit") val apartmentUnit: String? = null,
-    val city: String,
-    @SerialName("state_province") val stateProvince: String,
-    @SerialName("postal_code") val postalCode: String,
-    val country: String,
+    val city: String? = null,
+    @SerialName("state_province") val stateProvince: String? = null,
+    @SerialName("postal_code") val postalCode: String? = null,
+    val country: String? = null,
     val bedrooms: Int? = null,
     val bathrooms: Float? = null,
     @SerialName("square_footage") val squareFootage: Int? = null,
@@ -80,13 +80,13 @@ data class ResidenceSummary(
     val owner: Int,
     @SerialName("owner_username") val ownerUsername: String,
     val name: String,
-    @SerialName("property_type") val propertyType: String,
-    @SerialName("street_address") val streetAddress: String,
-    @SerialName("apartment_unit") val apartmentUnit: String?,
-    val city: String,
-    @SerialName("state_province") val stateProvince: String,
-    @SerialName("postal_code") val postalCode: String,
-    val country: String,
+    @SerialName("property_type") val propertyType: String? = null,
+    @SerialName("street_address") val streetAddress: String? = null,
+    @SerialName("apartment_unit") val apartmentUnit: String? = null,
+    val city: String? = null,
+    @SerialName("state_province") val stateProvince: String? = null,
+    @SerialName("postal_code") val postalCode: String? = null,
+    val country: String? = null,
     @SerialName("is_primary") val isPrimary: Boolean,
     @SerialName("task_summary") val taskSummary: TaskSummary,
     @SerialName("last_completed_task") val lastCompletedCustomTask: CustomTask?,
@@ -119,21 +119,21 @@ data class ResidenceWithTasks(
     @SerialName("is_primary_owner") val isPrimaryOwner: Boolean = false,
     @SerialName("user_count") val userCount: Int = 1,
     val name: String,
-    @SerialName("property_type") val propertyType: String,
-    @SerialName("street_address") val streetAddress: String,
-    @SerialName("apartment_unit") val apartmentUnit: String?,
-    val city: String,
-    @SerialName("state_province") val stateProvince: String,
-    @SerialName("postal_code") val postalCode: String,
-    val country: String,
-    val bedrooms: Int?,
-    val bathrooms: Float?,
-    @SerialName("square_footage") val squareFootage: Int?,
-    @SerialName("lot_size") val lotSize: Float?,
-    @SerialName("year_built") val yearBuilt: Int?,
-    val description: String?,
-    @SerialName("purchase_date") val purchaseDate: String?,
-    @SerialName("purchase_price") val purchasePrice: Double?,
+    @SerialName("property_type") val propertyType: String? = null,
+    @SerialName("street_address") val streetAddress: String? = null,
+    @SerialName("apartment_unit") val apartmentUnit: String? = null,
+    val city: String? = null,
+    @SerialName("state_province") val stateProvince: String? = null,
+    @SerialName("postal_code") val postalCode: String? = null,
+    val country: String? = null,
+    val bedrooms: Int? = null,
+    val bathrooms: Float? = null,
+    @SerialName("square_footage") val squareFootage: Int? = null,
+    @SerialName("lot_size") val lotSize: Float? = null,
+    @SerialName("year_built") val yearBuilt: Int? = null,
+    val description: String? = null,
+    @SerialName("purchase_date") val purchaseDate: String? = null,
+    @SerialName("purchase_price") val purchasePrice: Double? = null,
     @SerialName("is_primary") val isPrimary: Boolean,
     @SerialName("task_summary") val taskSummary: TaskSummary,
     val tasks: List<TaskDetail>,