fix(i18n): use JSON transport for rate limit wait message

Changed the rate limit wait countdown from a hardcoded English string to
a structured JSON payload for i18n-safe transport. The frontend ChatRow
component now parses the JSON to extract the seconds value, enabling proper
internationalization through the existing rateLimitWait translation key.

Author: roomote

src/core/task/Task.ts

@@ -3685,15 +3685,16 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 		)
 
 		// Only show the countdown UX on the first attempt. Retry flows have their own delay messaging.
-		if (rateLimitDelay > 0 && retryAttempt === 0) {
-			for (let i = rateLimitDelay; i > 0; i--) {
-				const delayMessage = `Rate limiting for ${i} seconds...`
-				await this.say("api_req_rate_limit_wait", delayMessage, undefined, true)
-				await delay(1000)
+			if (rateLimitDelay > 0 && retryAttempt === 0) {
+				for (let i = rateLimitDelay; i > 0; i--) {
+					// Send structured JSON data for i18n-safe transport
+					const delayMessage = JSON.stringify({ seconds: i })
+					await this.say("api_req_rate_limit_wait", delayMessage, undefined, true)
+					await delay(1000)
+				}
+				// Finalize the partial message so the UI doesn't keep rendering an in-progress spinner.
+				await this.say("api_req_rate_limit_wait", undefined, undefined, false)
 			}
-			// Finalize the partial message so the UI doesn't keep rendering an in-progress spinner.
-			await this.say("api_req_rate_limit_wait", undefined, undefined, false)
-		}
 	}
 
 	public async *attemptApiRequest(

src/core/task/__tests__/Task.spec.ts

@@ -1071,10 +1071,10 @@ describe("Cline", () => {
 				expect(mockDelay).toHaveBeenCalledTimes(mockApiConfig.rateLimitSeconds)
 				expect(mockDelay).toHaveBeenCalledWith(1000)
 
-				// Verify we used the non-error rate-limit wait message type
+				// Verify we used the non-error rate-limit wait message type (JSON format)
 				expect(saySpy).toHaveBeenCalledWith(
 					"api_req_rate_limit_wait",
-					expect.stringContaining("Rate limiting for"),
+					expect.stringMatching(/\{"seconds":\d+\}/),
 					undefined,
 					true,
 				)

webview-ui/src/components/chat/ChatRow.tsx

@@ -1183,8 +1183,12 @@ export const ChatRowContent = ({
 
 					const waitSeconds = (() => {
 						if (!message.text) return undefined
-						const match = message.text.match(/Rate limiting for (\d+) seconds\.{3}/)
-						return match ? Number(match[1]) : undefined
+						try {
+							const data = JSON.parse(message.text)
+							return typeof data.seconds === "number" ? data.seconds : undefined
+						} catch {
+							return undefined
+						}
 					})()
 
 					return (

webview-ui/src/components/chat/__tests__/ChatRow.rate-limit-wait.spec.tsx

@@ -48,7 +48,7 @@ describe("ChatRow - rate limit wait", () => {
 			say: "api_req_rate_limit_wait",
 			ts: Date.now(),
 			partial: true,
-			text: "Rate limiting for 1 seconds...",
+			text: JSON.stringify({ seconds: 1 }),
 		}
 
 		renderChatRow(message)