Persist lookup data to disk and refresh on app foreground

- DataManager now persists lookup data (residence types, task categories,
  priorities, statuses, specialties, templates) to disk
- Loads cached lookups on app startup for faster launch
- iOS: Refresh lookups when app becomes active, refresh widget on background
- Android: Initialize DataManager in onCreate, already had onResume refresh
- Only send ETag if lookup data is actually in memory to avoid 304 with no data

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

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

composeApp/src/commonMain/kotlin/com/example/casera/data/DataManager.kt

@@ -592,6 +592,7 @@ object DataManager {
     /**
      * Set all lookups from unified seeded data response.
      * Also stores the ETag for future conditional requests.
+     * Persists lookup data to disk for faster app startup.
      */
     fun setAllLookupsFromSeededData(seededData: SeededDataResponse, etag: String?) {
         setResidenceTypes(seededData.residenceTypes)
@@ -603,6 +604,8 @@ object DataManager {
         setTaskTemplatesGrouped(seededData.taskTemplates)
         setSeededDataETag(etag)
         _lookupsInitialized.value = true
+        // Persist lookups to disk for faster startup
+        persistLookupsToDisk()
     }
 
     /**
@@ -723,32 +726,63 @@ object DataManager {
 
     /**
      * Persist current state to disk.
-     * Only persists user data - all other data is fetched fresh from API.
-     * No offline mode support - network required for app functionality.
+     * Persists user data and lookup data for faster app startup.
      */
     private fun persistToDisk() {
         val manager = persistenceManager ?: return
 
         try {
-            // Only persist user data - everything else is fetched fresh from API
             _currentUser.value?.let {
                 manager.save(KEY_CURRENT_USER, json.encodeToString(it))
             }
         } catch (e: Exception) {
-            println("DataManager: Error persisting to disk: ${e.message}")
+            println("DataManager: Error persisting user to disk: ${e.message}")
+        }
+    }
+
+    /**
+     * Persist lookup data to disk separately (called less frequently).
+     */
+    private fun persistLookupsToDisk() {
+        val manager = persistenceManager ?: return
+
+        try {
+            if (_residenceTypes.value.isNotEmpty()) {
+                manager.save(KEY_RESIDENCE_TYPES, json.encodeToString(_residenceTypes.value))
+            }
+            if (_taskFrequencies.value.isNotEmpty()) {
+                manager.save(KEY_TASK_FREQUENCIES, json.encodeToString(_taskFrequencies.value))
+            }
+            if (_taskPriorities.value.isNotEmpty()) {
+                manager.save(KEY_TASK_PRIORITIES, json.encodeToString(_taskPriorities.value))
+            }
+            if (_taskStatuses.value.isNotEmpty()) {
+                manager.save(KEY_TASK_STATUSES, json.encodeToString(_taskStatuses.value))
+            }
+            if (_taskCategories.value.isNotEmpty()) {
+                manager.save(KEY_TASK_CATEGORIES, json.encodeToString(_taskCategories.value))
+            }
+            if (_contractorSpecialties.value.isNotEmpty()) {
+                manager.save(KEY_CONTRACTOR_SPECIALTIES, json.encodeToString(_contractorSpecialties.value))
+            }
+            _taskTemplatesGrouped.value?.let {
+                manager.save(KEY_TASK_TEMPLATES_GROUPED, json.encodeToString(it))
+            }
+            println("DataManager: Lookup data persisted to disk")
+        } catch (e: Exception) {
+            println("DataManager: Error persisting lookups to disk: ${e.message}")
         }
     }
 
     /**
      * Load cached state from disk.
-     * Only loads user data - all other data is fetched fresh from API.
-     * No offline mode support - network required for app functionality.
+     * Loads user data and lookup data for faster app startup.
      */
     private fun loadFromDisk() {
         val manager = persistenceManager ?: return
 
         try {
-            // Only load user data - everything else is fetched fresh from API
+            // Load user data
             manager.load(KEY_CURRENT_USER)?.let { data ->
                 _currentUser.value = json.decodeFromString<User>(data)
             }
@@ -762,15 +796,86 @@ object DataManager {
             manager.load(KEY_SEEDED_DATA_ETAG)?.let { data ->
                 _seededDataETag.value = data
             }
+
+            // Load lookup data
+            loadLookupsFromDisk()
         } catch (e: Exception) {
             println("DataManager: Error loading from disk: ${e.message}")
         }
     }
 
+    /**
+     * Load lookup data from disk.
+     * If lookups are successfully loaded, mark as initialized.
+     */
+    private fun loadLookupsFromDisk() {
+        val manager = persistenceManager ?: return
+        var lookupsLoaded = false
+
+        try {
+            manager.load(KEY_RESIDENCE_TYPES)?.let { data ->
+                val types = json.decodeFromString<List<ResidenceType>>(data)
+                _residenceTypes.value = types
+                _residenceTypesMap.value = types.associateBy { it.id }
+                lookupsLoaded = true
+            }
+
+            manager.load(KEY_TASK_FREQUENCIES)?.let { data ->
+                val frequencies = json.decodeFromString<List<TaskFrequency>>(data)
+                _taskFrequencies.value = frequencies
+                _taskFrequenciesMap.value = frequencies.associateBy { it.id }
+            }
+
+            manager.load(KEY_TASK_PRIORITIES)?.let { data ->
+                val priorities = json.decodeFromString<List<TaskPriority>>(data)
+                _taskPriorities.value = priorities
+                _taskPrioritiesMap.value = priorities.associateBy { it.id }
+            }
+
+            manager.load(KEY_TASK_STATUSES)?.let { data ->
+                val statuses = json.decodeFromString<List<TaskStatus>>(data)
+                _taskStatuses.value = statuses
+                _taskStatusesMap.value = statuses.associateBy { it.id }
+            }
+
+            manager.load(KEY_TASK_CATEGORIES)?.let { data ->
+                val categories = json.decodeFromString<List<TaskCategory>>(data)
+                _taskCategories.value = categories
+                _taskCategoriesMap.value = categories.associateBy { it.id }
+            }
+
+            manager.load(KEY_CONTRACTOR_SPECIALTIES)?.let { data ->
+                val specialties = json.decodeFromString<List<ContractorSpecialty>>(data)
+                _contractorSpecialties.value = specialties
+                _contractorSpecialtiesMap.value = specialties.associateBy { it.id }
+            }
+
+            manager.load(KEY_TASK_TEMPLATES_GROUPED)?.let { data ->
+                val grouped = json.decodeFromString<TaskTemplatesGroupedResponse>(data)
+                _taskTemplatesGrouped.value = grouped
+                _taskTemplates.value = grouped.categories.flatMap { it.templates }
+            }
+
+            // Mark lookups as initialized if we loaded any data
+            if (lookupsLoaded) {
+                _lookupsInitialized.value = true
+                println("DataManager: Lookup data loaded from disk")
+            }
+        } catch (e: Exception) {
+            println("DataManager: Error loading lookups from disk: ${e.message}")
+        }
+    }
+
     // ==================== PERSISTENCE KEYS ====================
-    // Only user data is persisted - all other data fetched fresh from API
 
     private const val KEY_CURRENT_USER = "dm_current_user"
     private const val KEY_HAS_COMPLETED_ONBOARDING = "dm_has_completed_onboarding"
     private const val KEY_SEEDED_DATA_ETAG = "dm_seeded_data_etag"
+    private const val KEY_RESIDENCE_TYPES = "dm_residence_types"
+    private const val KEY_TASK_FREQUENCIES = "dm_task_frequencies"
+    private const val KEY_TASK_PRIORITIES = "dm_task_priorities"
+    private const val KEY_TASK_STATUSES = "dm_task_statuses"
+    private const val KEY_TASK_CATEGORIES = "dm_task_categories"
+    private const val KEY_CONTRACTOR_SPECIALTIES = "dm_contractor_specialties"
+    private const val KEY_TASK_TEMPLATES_GROUPED = "dm_task_templates_grouped"
 }