Rename iFeels to Feels across entire codebase

- Bundle IDs: com.tt.ifeel* → com.tt.feels*
- App Groups: group.com.tt.ifeel* → group.com.tt.feels*
- iCloud containers: iCloud.com.tt.ifeel* → iCloud.com.tt.feels*
- IAP product IDs: com.tt.ifeel.IAP.* → com.tt.feels.IAP.*
- URLs: ifeels.app → feels.app
- Logger subsystems and dispatch queues
- Product names and display names

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

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

Shared/HealthKitManager.swift

@@ -14,7 +14,7 @@ class HealthKitManager: ObservableObject {
     static let shared = HealthKitManager()
 
     private let healthStore = HKHealthStore()
-    private let logger = Logger(subsystem: Bundle.main.bundleIdentifier ?? "com.tt.ifeel", category: "HealthKit")
+    private let logger = Logger(subsystem: Bundle.main.bundleIdentifier ?? "com.tt.feels", category: "HealthKit")
 
     @Published var isAuthorized = false
     @Published var authorizationError: Error?