fix: update Z.AI endpoint to use improved coding API

- Changed international Z.AI endpoint from /api/paas/v4 to /api/coding/paas/v4
- Updated corresponding tests to reflect the new endpoint
- This improves tool-calling capabilities for GLM models as documented by Z.AI

Fixes #7895

Author: roomote

src/api/providers/__tests__/zai.spec.ts

@@ -41,7 +41,9 @@ describe("ZAiHandler", () => {
 
 		it("should use the correct international Z AI base URL", () => {
 			new ZAiHandler({ zaiApiKey: "test-zai-api-key", zaiApiLine: "international" })
-			expect(OpenAI).toHaveBeenCalledWith(expect.objectContaining({ baseURL: "https://api.z.ai/api/paas/v4" }))
+			expect(OpenAI).toHaveBeenCalledWith(
+				expect.objectContaining({ baseURL: "https://api.z.ai/api/coding/paas/v4" }),
+			)
 		})
 
 		it("should use the provided API key for international", () => {
@@ -109,7 +111,9 @@ describe("ZAiHandler", () => {
 	describe("Default behavior", () => {
 		it("should default to international when no zaiApiLine is specified", () => {
 			const handlerDefault = new ZAiHandler({ zaiApiKey: "test-zai-api-key" })
-			expect(OpenAI).toHaveBeenCalledWith(expect.objectContaining({ baseURL: "https://api.z.ai/api/paas/v4" }))
+			expect(OpenAI).toHaveBeenCalledWith(
+				expect.objectContaining({ baseURL: "https://api.z.ai/api/coding/paas/v4" }),
+			)
 
 			const model = handlerDefault.getModel()
 			expect(model.id).toBe(internationalZAiDefaultModelId)

src/api/providers/zai.ts

@@ -21,7 +21,7 @@ export class ZAiHandler extends BaseOpenAiCompatibleProvider<InternationalZAiMod
 		super({
 			...options,
 			providerName: "Z AI",
-			baseURL: isChina ? "https://open.bigmodel.cn/api/paas/v4" : "https://api.z.ai/api/paas/v4",
+			baseURL: isChina ? "https://open.bigmodel.cn/api/paas/v4" : "https://api.z.ai/api/coding/paas/v4",
 			apiKey: options.zaiApiKey ?? "not-provided",
 			defaultProviderModelId: defaultModelId,
 			providerModels: models,