Calibrate planning task creation against the current composer

Retain the zero-model UI setup failure and create tasks through the real composer response. Remove random chat-fixture prefix collisions.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

tests/e2e/plan-task-fixture.spec.ts

@@ -0,0 +1,32 @@
+import { randomUUID } from "node:crypto";
+import { expect, test } from "@playwright/test";
+import { createPlanTaskThroughUi } from "../runner-e2e/plan-task-ui.js";
+
+test("planning fixture creates the exact assignment through the current composer without providers", async ({ page, request }) => {
+  const companyResponse = await request.post("/api/companies", { data: { name: `Planning setup ${randomUUID()}` } });
+  expect(companyResponse.ok()).toBe(true);
+  const company = await companyResponse.json();
+  try {
+    let lead: { id: string; name: string } | undefined;
+    for (const name of ["A Different Owner", "Planning Fixture Lead"]) {
+      const response = await request.post(`/api/companies/${company.id}/agents`, { data: {
+        name, role: "general", adapterType: "process", adapterConfig: { command: "false" },
+        runtimeConfig: { heartbeat: { enabled: false } },
+      } });
+      expect(response.ok()).toBe(true);
+      const agent = await response.json();
+      expect((await request.post(`/api/agents/${agent.id}/pause`)).ok()).toBe(true);
+      lead = agent;
+    }
+    const prompt = "Plan the work briefly, then carry it out. Verify a sample order and save the requested result.";
+    const created = await createPlanTaskThroughUi({ page, companyId: company.id, issuePrefix: company.issuePrefix,
+      agentName: lead!.name, prompt });
+    const issue = await (await request.get(`/api/issues/${created.id}`)).json();
+    expect(issue).toMatchObject({ companyId: company.id, assigneeAgentId: lead!.id, description: prompt, workMode: "standard" });
+    const runs = await request.get(`/api/companies/${company.id}/heartbeat-runs?limit=100`);
+    expect(runs.ok()).toBe(true);
+    expect(await runs.json()).toEqual([]);
+  } finally {
+    expect((await request.delete(`/api/companies/${company.id}`)).ok()).toBe(true);
+  }
+});