fix: handle Chinese and other non-Latin character encodings in terminal output

- Detect system locale and use appropriate UTF-8 encoding
- Convert GBK, SJIS, EUC-KR and other encodings to UTF-8
- Add comprehensive tests for locale detection
- Fixes #6768

Author: roomote

src/integrations/terminal/ExecaTerminalProcess.ts

@@ -32,21 +32,49 @@ export class ExecaTerminalProcess extends BaseTerminalProcess {
 		return terminal
 	}
 
+	/**
+	 * Gets the appropriate UTF-8 locale based on the system's current locale.
+	 * This ensures proper encoding for different languages, especially for
+	 * non-Latin character sets like Chinese, Japanese, Korean, etc.
+	 */
+	private getUtf8Locale(): { LANG: string; LC_ALL: string } {
+		const currentLang = process.env.LANG || process.env.LC_ALL || ""
+
+		// Extract the language/country part before the encoding (e.g., "zh_CN" from "zh_CN.GBK")
+		const langMatch = currentLang.match(/^([a-z]{2}_[A-Z]{2})/i)
+
+		if (langMatch) {
+			// Use the detected locale with UTF-8 encoding
+			const utf8Locale = `${langMatch[1]}.UTF-8`
+			return {
+				LANG: utf8Locale,
+				LC_ALL: utf8Locale,
+			}
+		}
+
+		// Fallback to en_US.UTF-8 if no locale is detected
+		return {
+			LANG: "en_US.UTF-8",
+			LC_ALL: "en_US.UTF-8",
+		}
+	}
+
 	public override async run(command: string) {
 		this.command = command
 
 		try {
 			this.isHot = true
 
+			const utf8Locale = this.getUtf8Locale()
+
 			this.subprocess = execa({
 				shell: true,
 				cwd: this.terminal.getCurrentWorkingDirectory(),
 				all: true,
 				env: {
 					...process.env,
-					// Ensure UTF-8 encoding for Ruby, CocoaPods, etc.
-					LANG: "en_US.UTF-8",
-					LC_ALL: "en_US.UTF-8",
+					// Ensure UTF-8 encoding based on system locale
+					...utf8Locale,
 				},
 			})`${command}`
 

src/integrations/terminal/__tests__/ExecaTerminalProcess.spec.ts

@@ -56,7 +56,10 @@ describe("ExecaTerminalProcess", () => {
 	})
 
 	describe("UTF-8 encoding fix", () => {
-		it("should set LANG and LC_ALL to en_US.UTF-8", async () => {
+		it("should set LANG and LC_ALL to en_US.UTF-8 when no locale is set", async () => {
+			delete process.env.LANG
+			delete process.env.LC_ALL
+			terminalProcess = new ExecaTerminalProcess(mockTerminal)
 			await terminalProcess.run("echo test")
 			const execaMock = vitest.mocked(execa)
 			expect(execaMock).toHaveBeenCalledWith(
@@ -81,9 +84,49 @@ describe("ExecaTerminalProcess", () => {
 			expect(calledOptions.env.EXISTING_VAR).toBe("existing")
 		})
 
-		it("should override existing LANG and LC_ALL values", async () => {
-			process.env.LANG = "C"
-			process.env.LC_ALL = "POSIX"
+		it("should convert Chinese GBK locale to UTF-8", async () => {
+			process.env.LANG = "zh_CN.GBK"
+			terminalProcess = new ExecaTerminalProcess(mockTerminal)
+			await terminalProcess.run("echo test")
+			const execaMock = vitest.mocked(execa)
+			const calledOptions = execaMock.mock.calls[0][0] as any
+			expect(calledOptions.env.LANG).toBe("zh_CN.UTF-8")
+			expect(calledOptions.env.LC_ALL).toBe("zh_CN.UTF-8")
+		})
+
+		it("should convert Japanese locale to UTF-8", async () => {
+			process.env.LANG = "ja_JP.SJIS"
+			terminalProcess = new ExecaTerminalProcess(mockTerminal)
+			await terminalProcess.run("echo test")
+			const execaMock = vitest.mocked(execa)
+			const calledOptions = execaMock.mock.calls[0][0] as any
+			expect(calledOptions.env.LANG).toBe("ja_JP.UTF-8")
+			expect(calledOptions.env.LC_ALL).toBe("ja_JP.UTF-8")
+		})
+
+		it("should handle locale from LC_ALL when LANG is not set", async () => {
+			delete process.env.LANG
+			process.env.LC_ALL = "ko_KR.EUC-KR"
+			terminalProcess = new ExecaTerminalProcess(mockTerminal)
+			await terminalProcess.run("echo test")
+			const execaMock = vitest.mocked(execa)
+			const calledOptions = execaMock.mock.calls[0][0] as any
+			expect(calledOptions.env.LANG).toBe("ko_KR.UTF-8")
+			expect(calledOptions.env.LC_ALL).toBe("ko_KR.UTF-8")
+		})
+
+		it("should handle already UTF-8 locale", async () => {
+			process.env.LANG = "zh_CN.UTF-8"
+			terminalProcess = new ExecaTerminalProcess(mockTerminal)
+			await terminalProcess.run("echo test")
+			const execaMock = vitest.mocked(execa)
+			const calledOptions = execaMock.mock.calls[0][0] as any
+			expect(calledOptions.env.LANG).toBe("zh_CN.UTF-8")
+			expect(calledOptions.env.LC_ALL).toBe("zh_CN.UTF-8")
+		})
+
+		it("should fallback to en_US.UTF-8 for invalid locale format", async () => {
+			process.env.LANG = "invalid_locale"
 			terminalProcess = new ExecaTerminalProcess(mockTerminal)
 			await terminalProcess.run("echo test")
 			const execaMock = vitest.mocked(execa)