feat: show backend optimization progress

src/lib/llm/__tests__/client.test.ts

@@ -142,6 +142,31 @@ describe("generateValidatedJson", () => {
     expect(warnSpy).not.toHaveBeenCalled();
   });
 
+  it("does not duplicate start and response logs when using the default JSON generator", async () => {
+    process.env.LLM_PROVIDER = "deepseek";
+    process.env.DEEPSEEK_API_KEY = "test-key";
+    const infoSpy = vi.spyOn(console, "info").mockImplementation(() => {});
+    client.setChatCompletionForTesting(async () => ({
+      choices: [{ message: { content: '{"value":"from-llm"}' } }],
+    }));
+
+    const result = await client.generateValidatedJson({
+      schema: z.object({ value: z.string() }),
+      prompt: "Return JSON.",
+      task: "article_optimizer",
+    });
+
+    expect(result).toEqual({ value: "from-llm" });
+    const startLogs = infoSpy.mock.calls
+      .map((call) => call[0])
+      .filter((line) => line.startsWith("[llm:start]"));
+    const responseLogs = infoSpy.mock.calls
+      .map((call) => call[0])
+      .filter((line) => line.startsWith("[llm:response]"));
+    expect(startLogs).toHaveLength(1);
+    expect(responseLogs).toHaveLength(1);
+  });
+
   it("logs validation failure without leaking provider secrets", async () => {
     process.env.LLM_PROVIDER = "deepseek";
     process.env.DEEPSEEK_API_KEY = "super-secret-key";