Release 1.2.1: iCloud sync improvements + ASO multilingual metadata

iCloud sync:
- Force viewContext.refreshAllObjects() on remote change notifications so
  data from other devices is picked up immediately without app restart
- Call refreshFromCloudKit() on foreground to merge any changes made while
  the device was inactive
- Wait up to 10s for initial CloudKit sync on launch before showing onboarding
  (shows "Checking iCloud..." during the wait)
- New OnboardingICloudCheckView: shown on fresh installs with iCloud available,
  lets user restore from iCloud before starting onboarding from scratch

Localization:
- Added de, fr, it, ja, pt-BR lproj folders
- New iCloud onboarding strings in en + es-ES (+ button literals)

ASO metadata (fastlane):
- Updated en-US: new subtitle, keywords, description (fixed "no cloud sync"
  claim), promotional text, release notes
- Added full metadata for es-ES, de-DE, fr-FR, it, ja, pt-BR (63 files total)
- All keyword fields validated ≤100 Unicode chars

Infrastructure:
- Gemfile + Gemfile.lock for fastlane
- Scripts/archive_and_upload_appstore.sh for CI/CD

Version: 1.2.1 (build 7)

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

PortfolioJournal/ViewModels/SnapshotFormViewModel.swift

@@ -94,8 +94,11 @@ class SnapshotFormViewModel: ObservableObject {
 
         // Contribution is optional but must be valid if included
         if includeContribution {
-            guard let contribution = parseDecimal(contributionString), contribution >= 0 else {
-                return false
+            let trimmed = contributionString.trimmingCharacters(in: .whitespacesAndNewlines)
+            if !trimmed.isEmpty {
+                guard let contribution = parseDecimal(trimmed), contribution >= 0 else {
+                    return false
+                }
             }
         }
 
@@ -120,7 +123,9 @@ class SnapshotFormViewModel: ObservableObject {
 
     var contribution: Decimal? {
         guard includeContribution else { return nil }
-        return parseDecimal(contributionString)
+        let trimmed = contributionString.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !trimmed.isEmpty else { return nil }
+        return parseDecimal(trimmed)
     }
 
     var formattedValue: String {