Fix import link error

mobile/Heygo/Views/SettingsView.swift

@@ -81,6 +81,49 @@ struct SettingsView: View {
             var skippedCount = 0
             var failedEntries: [String] = []
 
+            // Helper to generate slug similar to backend slugify
+            func generateSlug(_ raw: String) -> String {
+                let base = raw
+                    .lowercased()
+                    .trimmingCharacters(in: .whitespacesAndNewlines)
+                    .replacingOccurrences(of: " ", with: "-")
+                    .replacingOccurrences(of: "[^a-z0-9-]", with: "", options: .regularExpression)
+                return base
+            }
+
+            // Fetch or create tag ensuring unique slug
+            func fetchOrCreateTag(named name: String) throws -> Tag {
+                let trimmed = name.trimmingCharacters(in: .whitespacesAndNewlines)
+                if trimmed.isEmpty { throw NSError(domain: "Import", code: 10, userInfo: [NSLocalizedDescriptionKey: "Empty tag name"]) }
+
+                // Case-insensitive fetch
+                let request: NSFetchRequest<Tag> = Tag.fetchRequest()
+                request.predicate = NSPredicate(format: "name ==[c] %@", trimmed)
+                request.fetchLimit = 1
+                if let existing = try context.fetch(request).first { return existing }
+
+                // Create new tag with unique slug
+                let tag = Tag(context: context)
+                tag.name = trimmed
+                var slug = generateSlug(trimmed)
+                if slug.isEmpty { slug = UUID().uuidString.prefix(8).lowercased() }
+
+                // Ensure slug uniqueness
+                var uniqueSlug = slug
+                var index = 1
+                while true {
+                    let slugRequest: NSFetchRequest<Tag> = Tag.fetchRequest()
+                    slugRequest.predicate = NSPredicate(format: "slug == %@", uniqueSlug)
+                    slugRequest.fetchLimit = 1
+                    if try context.count(for: slugRequest) == 0 { break }
+                    uniqueSlug = "\(slug)-\(index)"
+                    index += 1
+                }
+                tag.slug = uniqueSlug
+                tag.createdAt = Date()
+                return tag
+            }
+
             // First try to parse the entire JSON as LinkData array
             do {
                 let linkDataArray = try JSONDecoder().decode([LinkData].self, from: data)
@@ -106,24 +149,12 @@ struct SettingsView: View {
                             // Handle tags if present
                             if let tagNames = linkData.tags {
                                 for tagName in tagNames {
-                                    let tagFetchRequest: NSFetchRequest<Tag> = Tag.fetchRequest()
-                                    tagFetchRequest.predicate = NSPredicate(format: "name == %@", tagName)
-
-                                    var tag: Tag
-                                    if let existingTag = try context.fetch(tagFetchRequest).first {
-                                        tag = existingTag
-                                    } else {
-                                        tag = Tag(context: context)
-                                        tag.name = tagName
-                                        // Generate slug (required non-optional Core Data attribute)
-                                        tag.slug = tagName
-                                            .lowercased()
-                                            .trimmingCharacters(in: .whitespacesAndNewlines)
-                                            .replacingOccurrences(of: " ", with: "-")
-                                            .replacingOccurrences(of: "[^a-z0-9-]", with: "", options: .regularExpression)
-                                        tag.createdAt = Date()
+                                    do {
+                                        let tag = try fetchOrCreateTag(named: tagName)
+                                        link.addToTags(tag)
+                                    } catch {
+                                        print("⚠️ Skipped tag '\(tagName)': \(error.localizedDescription)")
                                     }
-                                    link.addToTags(tag)
                                 }
                             }
 
@@ -170,24 +201,12 @@ struct SettingsView: View {
                             // Handle tags if present
                             if let tagNames = linkData.tags {
                                 for tagName in tagNames {
-                                    let tagFetchRequest: NSFetchRequest<Tag> = Tag.fetchRequest()
-                                    tagFetchRequest.predicate = NSPredicate(format: "name == %@", tagName)
-
-                                    var tag: Tag
-                                    if let existingTag = try context.fetch(tagFetchRequest).first {
-                                        tag = existingTag
-                                    } else {
-                                        tag = Tag(context: context)
-                                        tag.name = tagName
-                                        // Generate slug (required non-optional Core Data attribute)
-                                        tag.slug = tagName
-                                            .lowercased()
-                                            .trimmingCharacters(in: .whitespacesAndNewlines)
-                                            .replacingOccurrences(of: " ", with: "-")
-                                            .replacingOccurrences(of: "[^a-z0-9-]", with: "", options: .regularExpression)
-                                        tag.createdAt = Date()
+                                    do {
+                                        let tag = try fetchOrCreateTag(named: tagName)
+                                        link.addToTags(tag)
+                                    } catch {
+                                        print("⚠️ Skipped tag '\(tagName)': \(error.localizedDescription)")
                                     }
-                                    link.addToTags(tag)
                                 }
                             }
 
@@ -204,7 +223,17 @@ struct SettingsView: View {
                 }
             }
 
-            try context.save()
+            do {
+                try context.save()
+            } catch {
+                let nsError = error as NSError
+                if let detailed = nsError.userInfo[NSDetailedErrorsKey] as? [NSError] {
+                    for d in detailed { print("❌ Save detail: \(d), userInfo: \(d.userInfo)") }
+                } else {
+                    print("❌ Save error: \(nsError), userInfo: \(nsError.userInfo)")
+                }
+                throw nsError
+            }
 
             // Refresh the link view model
             linkViewModel.fetchLinks()