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/IAPManager.swift

@@ -45,8 +45,8 @@ class IAPManager: ObservableObject {
     static let subscriptionGroupID = "2CFE4C4F"
 
     private let productIdentifiers: Set<String> = [
-        "com.tt.ifeel.IAP.subscriptions.monthly",
-        "com.tt.ifeel.IAP.subscriptions.yearly"
+        "com.tt.feels.IAP.subscriptions.monthly",
+        "com.tt.feels.IAP.subscriptions.yearly"
     ]
 
     private let trialDays = 30