fix: unify chat process and reply presentation

src/features/agent/session-state.test.ts

@@ -31,6 +31,15 @@ describe("agent session state", () => {
     expect(next[0]).toMatchObject({ id: "tool-1", status: "completed", title: "工具完成", durationMs: 40 });
   });
 
+  it("retains full tool inputs across stream updates and persisted history", () => {
+    const input = { address: "完整地址".repeat(70), point: { longitude: 121.5, latitude: 31.2 }, radius: 500 };
+    const first = upsertProgress(undefined, { id: "tool", phase: "tool", tool: { name: "mcp_tjwater_geocode", call_id: "native-call", input } });
+    const next = upsertProgress(first, { id: "tool", phase: "tool", status: "completed" });
+    expect(next[0].tool).toEqual({ name: "mcp_tjwater_geocode", callId: "native-call", input });
+    expect(upsertProgress(undefined, next[0])[0].tool).toEqual(next[0].tool);
+    expect(upsertProgress(undefined, { tool: { name: 3, input: [] } })[0].tool).toBeUndefined();
+  });
+
   it("normalizes todo updates", () => {
     expect(
       toTodoUpdate({