fix(rectification): pass server case id to agent

frontend/tests/rectification-v9-agent.test.ts

@@ -173,6 +173,35 @@ function runOptions(overrides: Partial<V9AgentRunOptions> = {}): {
   return { options: optionsValue, emitted, billing };
 }
 
+test("agent receives the exact server-owned case id for tool calls", async () => {
+  let observedMessages: unknown[] = [];
+  const agent = fakeAgentStream([
+    chunk("start"),
+    chunk("tool-call", { toolName: "skill", args: { name: RECTIFICATION_SKILL_NAME } }),
+    chunk("tool-result", { toolName: "skill" }),
+    chunk("tool-call", { toolName: "rectification-read-case", args: { caseId: CASE_ID } }),
+    chunk("tool-result", { toolName: "rectification-read-case" }),
+    chunk("text-delta", { text: "你好，我是生时校正助手。" }),
+    chunk("finish"),
+  ]);
+  const { options } = runOptions({
+    action: "opening",
+    message: null,
+    buildAgent: async () => ({
+      ...agent,
+      stream: async (messages: unknown[]) => {
+        observedMessages = messages;
+        return agent.stream();
+      },
+    }) as never,
+  });
+
+  const result = await runV9AgentTurn(options);
+
+  assert.equal(result.ok, true);
+  assert.match(JSON.stringify(observedMessages), new RegExp(CASE_ID));
+});
+
 test("first turn with no real skill evidence retries once then fails without saving success", async () => {
   const { options, emitted, billing } = runOptions({
     accounting: fakeAccounting({