预设兼容：按真实抓包对齐装配与包装层，补上声明式工具与预设正则。

- 装配只认 prompt_order.enabled；squash_system_messages 只合并相邻 system（新增 system 档，连接符按酒馆用单换行）
- 包装层：new_chat_prompt、示例对话（new_example_chat_prompt + <START> 切段 + name）、角色卡三块与 personality_format/scenario_format、{{user}}/{{char}} 取值、任务契约并进预设条目
- 工具协议：按 ToolBindings / 伪工具协议数据声明真 tools（presetToolPolicy=preset），工具描述用到的条目不再重复作为消息发出
- 正则：promptOnly 作用于对话历史（含 depth 过滤）、写入时脚本改写回复；{{//}} 注释按配平扫描
- tools/st-request-diff：真假上游抓包对比工具、三份预设的机制结论与实测报告

tests/chat-scroll.test.ts

@@ -0,0 +1,103 @@
+import { describe, expect, it } from "vitest";
+import { planWheelScroll } from "../web/chat-scroll.js";
+
+describe("planWheelScroll", () => {
+  it("rolls the card first and leaves the big scroller alone", () => {
+    const plan = planWheelScroll({
+      cardScrollTop: 0,
+      cardScrollMax: 400,
+      deltaY: 100,
+      streamScrollTop: 0,
+      streamScrollMax: 2000,
+    });
+    expect(plan.cardDelta).toBe(100);
+    expect(plan.streamDelta).toBe(0);
+    expect(plan.rest).toBe(0);
+  });
+
+  it("hands the leftover to the big scroller once the card hits its bottom", () => {
+    const plan = planWheelScroll({
+      cardScrollTop: 380,
+      cardScrollMax: 400,
+      deltaY: 100,
+      streamScrollTop: 0,
+      streamScrollMax: 2000,
+    });
+    expect(plan.cardDelta).toBe(20);
+    expect(plan.streamDelta).toBe(80);
+    expect(plan.rest).toBe(0);
+  });
+
+  it("skips the card when it is already at the bottom", () => {
+    const plan = planWheelScroll({
+      cardScrollTop: 400,
+      cardScrollMax: 400,
+      deltaY: 100,
+      streamScrollTop: 0,
+      streamScrollMax: 2000,
+    });
+    expect(plan.cardDelta).toBe(0);
+    expect(plan.streamDelta).toBe(100);
+  });
+
+  it("scrolls up the card first, then the big scroller", () => {
+    const plan = planWheelScroll({
+      cardScrollTop: 10,
+      cardScrollMax: 400,
+      deltaY: -100,
+      streamScrollTop: 500,
+      streamScrollMax: 2000,
+    });
+    expect(plan.cardDelta).toBe(-10);
+    expect(plan.streamDelta).toBe(-90);
+  });
+
+  it("treats a card that cannot scroll as no card at all", () => {
+    const plan = planWheelScroll({
+      cardScrollTop: 0,
+      cardScrollMax: 0,
+      deltaY: 120,
+      streamScrollTop: 0,
+      streamScrollMax: 2000,
+    });
+    expect(plan.cardDelta).toBe(0);
+    expect(plan.streamDelta).toBe(120);
+  });
+
+  it("stops at the ends of both scrollers", () => {
+    const down = planWheelScroll({
+      cardScrollTop: 400,
+      cardScrollMax: 400,
+      deltaY: 100,
+      streamScrollTop: 2000,
+      streamScrollMax: 2000,
+    });
+    expect(down.cardDelta).toBe(0);
+    expect(down.streamDelta).toBe(0);
+    expect(down.rest).toBe(100);
+
+    const up = planWheelScroll({
+      cardScrollTop: 0,
+      cardScrollMax: 400,
+      deltaY: -100,
+      streamScrollTop: 0,
+      streamScrollMax: 2000,
+    });
+    expect(up.rest).toBe(-100);
+  });
+
+  it("keeps fractional trackpad deltas", () => {
+    const plan = planWheelScroll({
+      cardScrollTop: 12.5,
+      cardScrollMax: 400,
+      deltaY: 7.25,
+    });
+    expect(plan.cardDelta).toBeCloseTo(7.25, 5);
+    expect(plan.rest).toBeCloseTo(0, 5);
+  });
+
+  it("does nothing without a delta", () => {
+    const plan = planWheelScroll({ cardScrollMax: 400, streamScrollMax: 800 });
+    expect(plan).toEqual({ cardDelta: 0, streamDelta: 0, rest: 0 });
+  });
+});