Update signing configuration to use 88oakapps.feels identifiers

- Update App Group IDs from group.com.tt.feels to group.com.88oakapps.feels
- Update iCloud container IDs from iCloud.com.tt.feels to iCloud.com.88oakapps.feels
- Sync code constants with entitlements across all targets (iOS, Watch, Widget)
- Update documentation in CLAUDE.md and PROJECT_OVERVIEW.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Shared/HealthKitManager.swift

@@ -261,6 +261,60 @@ class HealthKitManager: ObservableObject {
         ])
     }
 
+    // MARK: - Delete All Moods from HealthKit
+
+    /// Deletes all State of Mind samples created by this app
+    /// Note: HealthKit only allows deleting samples that your app created
+    func deleteAllMoods() async throws -> Int {
+        guard isHealthKitAvailable else {
+            throw HealthKitError.notAvailable
+        }
+
+        guard let stateOfMindType = stateOfMindType else {
+            throw HealthKitError.typeNotAvailable
+        }
+
+        guard checkAuthorizationStatus() == .sharingAuthorized else {
+            throw HealthKitError.notAuthorized
+        }
+
+        logger.info("Starting deletion of all State of Mind samples from this app")
+
+        // Fetch all State of Mind samples (HealthKit will only return ones we can delete - our own)
+        let samples = try await fetchMoods(
+            from: Date(timeIntervalSince1970: 0),
+            to: Date().addingTimeInterval(86400) // Include today + 1 day buffer
+        )
+
+        guard !samples.isEmpty else {
+            logger.info("No State of Mind samples found to delete")
+            return 0
+        }
+
+        logger.info("Found \(samples.count) State of Mind samples to delete")
+
+        // Delete in batches
+        let batchSize = 50
+        var deletedCount = 0
+
+        for batchStart in stride(from: 0, to: samples.count, by: batchSize) {
+            let batchEnd = min(batchStart + batchSize, samples.count)
+            let batch = Array(samples[batchStart..<batchEnd])
+
+            do {
+                try await healthStore.delete(batch)
+                deletedCount += batch.count
+                logger.info("Deleted batch \(batchStart/batchSize + 1): \(batch.count) samples")
+            } catch {
+                logger.error("Failed to delete batch starting at \(batchStart): \(error.localizedDescription)")
+                throw error
+            }
+        }
+
+        logger.info("Successfully deleted \(deletedCount) State of Mind samples from HealthKit")
+        return deletedCount
+    }
+
     // MARK: - Read Mood from HealthKit
 
     func fetchMoods(from startDate: Date, to endDate: Date) async throws -> [HKStateOfMind] {