fix: localize reply-complete placeholder via L10n instead of hardcoded Chinese

Sources/CodeIsland/AppState.swift

@@ -1362,7 +1362,8 @@ final class AppState {
         // approved in the terminal — resume those (and only those) as approved.
         resolveOrphanPermissionsOnActivity(event)
 
-        let effects = reduceEvent(sessions: &sessions, event: event, maxHistory: maxHistory)
+        let effects = reduceEvent(sessions: &sessions, event: event, maxHistory: maxHistory,
+                                  replyCompletePlaceholder: L10n.shared["reply_complete_placeholder"])
 
         // Cursor Agent Tasks often fire Claude-format hooks without `--source`,
         // leaving ghost Claude cards. Rebrand + fold before the rest of the

Sources/CodeIsland/L10n.swift

@@ -393,6 +393,7 @@ final class L10n: ObservableObject {
         "scroll_for_more": "Scroll for more",
         "scroll_hidden": "more below",
         "lines": "lines",
+        "reply_complete_placeholder": "Reply complete",
     ]
 
     private static let de: [String: String] = en.merging([
@@ -741,6 +742,7 @@ final class L10n: ObservableObject {
         "scroll_for_more": "Für mehr scrollen",
         "scroll_hidden": "weitere unten",
         "lines": "Zeilen",
+        "reply_complete_placeholder": "Antwort abgeschlossen",
     ]) { _, localized in localized }
 
     private static let zh: [String: String] = [
@@ -1093,6 +1095,7 @@ final class L10n: ObservableObject {
         "scroll_for_more": "向下滚动查看更多",
         "scroll_hidden": "个未显示",
         "lines": "行",
+        "reply_complete_placeholder": "回复完成",
     ]
 
     private static let zhHant: [String: String] = [
@@ -1445,6 +1448,7 @@ final class L10n: ObservableObject {
         "scroll_for_more": "向下捲動查看更多",
         "scroll_hidden": "個未顯示",
         "lines": "行",
+        "reply_complete_placeholder": "回覆完成",
     ]
 
     private static let ja: [String: String] = [
@@ -1797,6 +1801,7 @@ final class L10n: ObservableObject {
         "scroll_for_more": "さらに表示するにはスクロール",
         "scroll_hidden": "下にさらにあります",
         "lines": "行",
+        "reply_complete_placeholder": "返信完了",
     ]
 
     private static let ko: [String: String] = [
@@ -2149,6 +2154,7 @@ final class L10n: ObservableObject {
         "scroll_for_more": "더 보려면 스크롤",
         "scroll_hidden": "아래에 더 있음",
         "lines": "줄",
+        "reply_complete_placeholder": "답변 완료",
     ]
 
     private static let tr: [String: String] = [
@@ -2501,5 +2507,6 @@ final class L10n: ObservableObject {
         "scroll_for_more": "Daha fazla için kaydır",
         "scroll_hidden": "aşağıda",
         "lines": "satır",
+        "reply_complete_placeholder": "Yanıt tamamlandı",
     ]
 }

Sources/CodeIslandCore/SessionSnapshot.swift

@@ -915,7 +915,8 @@ public enum SideEffect: Equatable {
 public func reduceEvent(
     sessions: inout [String: SessionSnapshot],
     event: HookEvent,
-    maxHistory: Int
+    maxHistory: Int,
+    replyCompletePlaceholder: String = "Reply complete"
 ) -> [SideEffect] {
     let sessionId = event.sessionId ?? "default"
     let eventName = EventNormalizer.normalize(event.eventName)
@@ -1111,7 +1112,7 @@ public func reduceEvent(
             sessions[sessionId]?.addRecentMessage(ChatMessage(isUser: false, text: msg))
         } else if sessions[sessionId]?.lastAssistantMessage == nil,
                   sessions[sessionId]?.recentMessages.last?.isUser == true {
-            sessions[sessionId]?.addRecentMessage(ChatMessage(isUser: false, text: "[回复完成]"))
+            sessions[sessionId]?.addRecentMessage(ChatMessage(isUser: false, text: replyCompletePlaceholder))
         }
         // Cline tasks are single-round — treat completion/cancellation as session end,
         // and latch a flag so out-of-order in-flight tool events don't revive it.
@@ -1157,7 +1158,7 @@ public func reduceEvent(
         } else if sessions[sessionId]?.lastAssistantMessage == nil,
                   sessions[sessionId]?.recentMessages.last?.isUser == true {
             // No reply content from hook (e.g. CodeBuddy) -- add placeholder
-            sessions[sessionId]?.addRecentMessage(ChatMessage(isUser: false, text: "[回复完成]"))
+            sessions[sessionId]?.addRecentMessage(ChatMessage(isUser: false, text: replyCompletePlaceholder))
         }
         // Try to capture user prompt from Stop event if not already set
         if sessions[sessionId]?.lastUserPrompt == nil {

Tests/CodeIslandCoreTests/ReplyCompletePlaceholderTests.swift

@@ -0,0 +1,135 @@
+import XCTest
+@testable import CodeIslandCore
+
+final class ReplyCompletePlaceholderTests: XCTestCase {
+    private func hookEvent(_ payload: [String: Any]) throws -> HookEvent {
+        let data = try JSONSerialization.data(withJSONObject: payload)
+        guard let event = HookEvent(from: data) else {
+            XCTFail("HookEvent should decode payload: \(payload)")
+            throw NSError(domain: "ReplyCompletePlaceholderTests", code: 1)
+        }
+        return event
+    }
+
+    // MARK: - TaskRoundComplete (Cline TaskComplete → normalized)
+
+    func testTaskRoundCompleteUsesInjectedPlaceholderWhenNoMessageContent() throws {
+        var session = SessionSnapshot()
+        session.source = "cline"
+        session.addRecentMessage(ChatMessage(isUser: true, text: "do the thing"))
+        var sessions = ["cline-session": session]
+
+        let event = try hookEvent([
+            "hook_event_name": "TaskComplete",
+            "session_id": "cline-session",
+            "_source": "cline",
+        ])
+        _ = reduceEvent(sessions: &sessions, event: event, maxHistory: 20,
+                        replyCompletePlaceholder: "답변 완료")
+
+        let last = sessions["cline-session"]?.recentMessages.last
+        XCTAssertEqual(last?.isUser, false)
+        XCTAssertEqual(last?.text, "답변 완료")
+    }
+
+    func testTaskRoundCompleteUsesMessageContentWhenPresent() throws {
+        var session = SessionSnapshot()
+        session.source = "cline"
+        session.addRecentMessage(ChatMessage(isUser: true, text: "do the thing"))
+        var sessions = ["cline-session": session]
+
+        let event = try hookEvent([
+            "hook_event_name": "TaskComplete",
+            "session_id": "cline-session",
+            "_source": "cline",
+            "message": "Here is your answer",
+        ])
+        _ = reduceEvent(sessions: &sessions, event: event, maxHistory: 20,
+                        replyCompletePlaceholder: "Reply complete")
+
+        let last = sessions["cline-session"]?.recentMessages.last
+        XCTAssertEqual(last?.text, "Here is your answer")
+    }
+
+    // MARK: - Stop event
+
+    func testStopEventUsesInjectedPlaceholderWhenNoMessageContent() throws {
+        var session = SessionSnapshot()
+        session.source = "codebuddy"
+        session.addRecentMessage(ChatMessage(isUser: true, text: "do the thing"))
+        var sessions = ["cb-session": session]
+
+        let event = try hookEvent([
+            "hook_event_name": "Stop",
+            "session_id": "cb-session",
+            "_source": "codebuddy",
+        ])
+        _ = reduceEvent(sessions: &sessions, event: event, maxHistory: 20,
+                        replyCompletePlaceholder: "返信完了")
+
+        let last = sessions["cb-session"]?.recentMessages.last
+        XCTAssertEqual(last?.isUser, false)
+        XCTAssertEqual(last?.text, "返信完了")
+    }
+
+    func testStopEventUsesMessageContentWhenPresent() throws {
+        var session = SessionSnapshot()
+        session.source = "codebuddy"
+        session.addRecentMessage(ChatMessage(isUser: true, text: "do the thing"))
+        var sessions = ["cb-session": session]
+
+        let event = try hookEvent([
+            "hook_event_name": "Stop",
+            "session_id": "cb-session",
+            "_source": "codebuddy",
+            "message": "Task finished",
+        ])
+        _ = reduceEvent(sessions: &sessions, event: event, maxHistory: 20,
+                        replyCompletePlaceholder: "Reply complete")
+
+        let last = sessions["cb-session"]?.recentMessages.last
+        XCTAssertEqual(last?.text, "Task finished")
+    }
+
+    // MARK: - Default value
+
+    func testDefaultPlaceholderIsEnglishWithoutBrackets() throws {
+        var session = SessionSnapshot()
+        session.source = "codebuddy"
+        session.addRecentMessage(ChatMessage(isUser: true, text: "do the thing"))
+        var sessions = ["cb-session": session]
+
+        let event = try hookEvent([
+            "hook_event_name": "Stop",
+            "session_id": "cb-session",
+            "_source": "codebuddy",
+        ])
+        _ = reduceEvent(sessions: &sessions, event: event, maxHistory: 20)
+
+        let last = sessions["cb-session"]?.recentMessages.last
+        XCTAssertEqual(last?.text, "Reply complete")
+        XCTAssertFalse(last?.text.hasPrefix("[") ?? true, "Default placeholder must not start with '['")
+    }
+
+    // MARK: - Placeholder skipped when prior assistant message exists
+
+    func testPlaceholderIsSkippedWhenLastAssistantMessageAlreadySet() throws {
+        var session = SessionSnapshot()
+        session.source = "codebuddy"
+        session.lastAssistantMessage = "previous reply"
+        session.addRecentMessage(ChatMessage(isUser: true, text: "follow-up"))
+        var sessions = ["cb-session": session]
+
+        let event = try hookEvent([
+            "hook_event_name": "Stop",
+            "session_id": "cb-session",
+            "_source": "codebuddy",
+        ])
+        _ = reduceEvent(sessions: &sessions, event: event, maxHistory: 20,
+                        replyCompletePlaceholder: "Reply complete")
+
+        let messages = sessions["cb-session"]?.recentMessages ?? []
+        XCTAssertFalse(messages.contains(where: { $0.text == "Reply complete" }),
+                       "Placeholder must not be added when lastAssistantMessage is already set")
+    }
+}

Tests/CodeIslandTests/L10nTests.swift

@@ -157,4 +157,46 @@ final class L10nTests: XCTestCase {
         let formattedUpdate = String(format: updateAvailable, "1.0.19", "1.0.18")
         XCTAssertEqual(formattedUpdate, "CodeIsland 1.0.19 ist verfügbar (aktuell: 1.0.18). Möchtest du es herunterladen?")
     }
+
+    // MARK: - reply_complete_placeholder
+
+    func testReplyCompletePlaceholderExistsInAllLanguages() {
+        let languages = ["en", "de", "zh", "zh-Hant", "ja", "ko", "tr"]
+        for lang in languages {
+            guard let dict = L10n.strings[lang] else {
+                XCTFail("Language '\(lang)' not found in L10n.strings")
+                continue
+            }
+            XCTAssertTrue(dict.keys.contains("reply_complete_placeholder"),
+                          "Language '\(lang)' is missing reply_complete_placeholder")
+        }
+    }
+
+    func testReplyCompletePlaceholderHasNoBrackets() {
+        let languages = ["en", "de", "zh", "zh-Hant", "ja", "ko", "tr"]
+        for lang in languages {
+            let value = L10n.strings[lang]?["reply_complete_placeholder"] ?? ""
+            XCTAssertFalse(value.hasPrefix("["),
+                           "'\(lang)' reply_complete_placeholder must not start with '['")
+            XCTAssertFalse(value.hasSuffix("]"),
+                           "'\(lang)' reply_complete_placeholder must not end with ']'")
+        }
+    }
+
+    func testReplyCompletePlaceholderReturnsLocalizedValuePerLanguage() {
+        let expected: [String: String] = [
+            "en": "Reply complete",
+            "de": "Antwort abgeschlossen",
+            "zh": "回复完成",
+            "zh-Hant": "回覆完成",
+            "ja": "返信完了",
+            "ko": "답변 완료",
+            "tr": "Yanıt tamamlandı",
+        ]
+        for (lang, translation) in expected {
+            L10n.shared.language = lang
+            XCTAssertEqual(L10n.shared["reply_complete_placeholder"], translation,
+                           "Wrong reply_complete_placeholder for language '\(lang)'")
+        }
+    }
 }