i18n: complete app-wide localization (10 languages) + audit tooling

Localize all user-facing strings across iOS (SwiftUI), shared Kotlin, and
Android Compose into en/es/fr/de/pt/it/ja/ko/nl/zh:
- iOS String Catalogs: main + widget Localizable.xcstrings, InfoPlist.xcstrings
  (permissions), plural variations, ~200 new keys translated
- Shared Kotlin ClientStrings table + Android composeResources/values-* (884 keys
  ×10), routed Api/ViewModel/util error & UI strings through localization
- Backend-localized lookups/suggestions consumed via display names
- Widget extension catalog; theme names, home-profile fallbacks, validation,
  network errors, accessibility labels all localized

Add re-runnable verification gates:
- scripts/i18n_audit.py  — enumerate every literal, partition to GAP=0
- scripts/i18n_coverage.py — all 10 locales translated, format-specifier parity

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

iosApp/HoneyDue/HoneyDue.swift

@@ -59,17 +59,21 @@ private func formatWidgetDate(_ dateString: String) -> String {
     let dueDay = calendar.startOfDay(for: parsedDate)
 
     if calendar.isDateInToday(parsedDate) {
-        return "Today"
+        return String(localized: "Today")
     }
 
     let components = calendar.dateComponents([.day], from: today, to: dueDay)
     let days = components.day ?? 0
 
     if days > 0 {
-        return days == 1 ? "in 1 day" : "in \(days) days"
+        return days == 1
+            ? String(localized: "in 1 day")
+            : String(format: String(localized: "in %lld days"), days)
     } else {
         let overdueDays = abs(days)
-        return overdueDays == 1 ? "1 day ago" : "\(overdueDays) days ago"
+        return overdueDays == 1
+            ? String(localized: "1 day ago")
+            : String(format: String(localized: "%lld days ago"), overdueDays)
     }
 }
 
@@ -380,7 +384,9 @@ struct FreeWidgetView: View {
                     )
             }
 
-            Text(entry.taskCount == 1 ? "task waiting" : "tasks waiting")
+            Text(entry.taskCount == 1
+                 ? String(localized: "task waiting")
+                 : String(localized: "tasks waiting"))
                 .font(.system(size: 14, weight: .semibold, design: .rounded))
                 .foregroundStyle(Color.appTextSecondary)
                 .multilineTextAlignment(.center)
@@ -423,7 +429,7 @@ struct SmallWidgetView: View {
                         )
 
                     if entry.taskCount > 0 {
-                        Text(entry.taskCount == 1 ? "task" : "tasks")
+                        Text(entry.taskCount == 1 ? String(localized: "task") : String(localized: "tasks"))
                             .font(.system(size: 11, weight: .semibold, design: .rounded))
                             .foregroundStyle(Color.appTextSecondary)
                     }
@@ -556,7 +562,7 @@ struct MediumWidgetView: View {
                         )
                 }
 
-                Text(entry.taskCount == 1 ? "task" : "tasks")
+                Text(entry.taskCount == 1 ? String(localized: "task") : String(localized: "tasks"))
                     .font(.system(size: 12, weight: .semibold, design: .rounded))
                     .foregroundStyle(Color.appTextSecondary)
 
@@ -748,7 +754,7 @@ struct LargeWidgetView: View {
                     }
 
                     if entry.upcomingTasks.count > maxTasksToShow {
-                        Text("+ \(entry.upcomingTasks.count - maxTasksToShow) more")
+                        Text(String(format: String(localized: "+ %lld more"), entry.upcomingTasks.count - maxTasksToShow))
                             .font(.system(size: 10, weight: .semibold, design: .rounded))
                             .foregroundStyle(Color.appTextSecondary)
                             .frame(maxWidth: .infinity, alignment: .center)
@@ -776,21 +782,21 @@ struct OrganicStatsView: View {
             // Overdue
             OrganicStatPillWidget(
                 value: entry.overdueCount,
-                label: "Overdue",
+                label: String(localized: "Overdue"),
                 color: entry.overdueCount > 0 ? Color.appError : Color.appTextSecondary
             )
 
             // Next 7 Days
             OrganicStatPillWidget(
                 value: entry.dueNext7DaysCount,
-                label: "7 Days",
+                label: String(localized: "7 Days"),
                 color: Color.appAccent
             )
 
             // Next 30 Days
             OrganicStatPillWidget(
                 value: entry.dueNext30DaysCount,
-                label: "30 Days",
+                label: String(localized: "30 Days"),
                 color: Color.appPrimary
             )
         }
@@ -816,7 +822,7 @@ struct OrganicStatPillWidget: View {
                     )
                 )
 
-            Text(label)
+            Text(LocalizedStringKey(label))
                 .font(.system(size: 9, weight: .semibold, design: .rounded))
                 .foregroundStyle(Color.appTextSecondary)
                 .lineLimit(1)