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/BGTask.swift

@@ -9,7 +9,7 @@ import Foundation
 import BackgroundTasks
 
 class BGTask {
-    static let updateDBMissingID = "com.tt.ifeel.dbUpdateMissing"
+    static let updateDBMissingID = "com.tt.feels.dbUpdateMissing"
 
     @MainActor
     class func runFillInMissingDatesTask(task: BGProcessingTask) {