feat(agent): unify MCP tools and adopt Responses delivery

Move project and host queries into native MCP with host-owned OAuth/context,
while retaining memory, skills, actions and publication plugins. Add nearby-model
queries and explicit chat/task/learning model defaults.

Adopt Responses HTTP/SSE and native steer/queue inbox delivery, preserving scoped
session ownership, pending input edits and investigation communication.

Disable local-provider discovery: Server /health allowed native vLLM to probe
/v1/models on port 8000. A native before/after regression prevents recurrence.

Validation: 170 focused Bun tests; service/plugin typechecks; native discovery,
provider-discovery and input-inbox smoke checks; no paid model inference.

tests/product/investigationReport.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "bun:test";
-import { taskReportSchema } from "../../src/product/investigation-report.js";
+import { taskReportSchema, taskProgressSchema } from "../../src/product/investigation-report.js";
 
 const report = { title: "调查报告", current_conclusion: "无法确定原因", conclusion_boundary: "仅有上游数据",
   evidence_refs: ["query-1"], recommendations: [], pending_items: [], stage: "final", outcome: "insufficient_data",
@@ -34,4 +34,35 @@ describe("new investigation report writes", () => {
       expect(() => taskReportSchema.parse({ ...report, ...changes })).toThrow();
     }
   });
+  it("shares explicit node activity and supply feature targets with progress", () => {
+    const diagram = { title: "当前调查", mermaid: "flowchart LR\nQUERY --> HUMAN",
+      node_refs: [{ node_id: "QUERY", label: "核对监测", status: "running", evidence_refs: ["query-1"],
+        map_targets: [{ source_id: "scada", feature_id: "MP01" }] },
+      { node_id: "HUMAN", label: "现场核验", status: "waiting_human" }] };
+    const progress = taskProgressSchema.parse({ summary: "正在核对投诉时段的实际监测记录", diagram });
+    expect(progress.diagram?.node_refs[0]).toMatchObject({ status: "running", map_targets: [{ source_id: "scada", feature_id: "MP01" }] });
+    expect(taskReportSchema.parse({ ...report, diagram }).diagram).toEqual(progress.diagram);
+    expect(taskProgressSchema.parse({ summary: "调整调查方向", diagram: null }).diagram).toBeNull();
+    for (const change of [{ status: "waiting" }, { map_targets: [{ source_id: "drainage", feature_id: "X" }] },
+      { map_targets: [{ source_id: "scada", feature_id: "" }] }]) {
+      expect(() => taskProgressSchema.parse({ summary: "核对", diagram: {
+        ...diagram, node_refs: [{ ...diagram.node_refs[0], ...change }],
+      } })).toThrow();
+    }
+  });
+  it("preserves parallel branches with independent activity and a pending join", () => {
+    const mermaid = 'flowchart TD\nSTART[受理投诉] --> SPLIT{并行核查}\nSPLIT --> TICKETS[工单核查]\nSPLIT --> SCADA[监测核查]\nTICKETS --> JOIN[汇总证据]\nSCADA --> JOIN';
+    const diagram = { title: "并行调查", mermaid, node_refs: [
+      { node_id: "TICKETS", label: "工单核查", status: "running" },
+      { node_id: "SCADA", label: "监测核查", status: "running" },
+      { node_id: "JOIN", label: "汇总证据", status: "pending" },
+    ] };
+    const progress = taskProgressSchema.parse({ summary: "两个独立核查正在执行", diagram });
+    expect(progress.diagram?.mermaid).toBe(mermaid);
+    expect(progress.diagram?.node_refs.map((node) => node.status)).toEqual(["running", "running", "pending"]);
+    const updated = taskProgressSchema.parse({ summary: "工单核查已完成，监测核查仍在执行", diagram: {
+      ...diagram, node_refs: [{ ...diagram.node_refs[0], status: "completed", evidence_refs: ["query-1"] }, ...diagram.node_refs.slice(1)],
+    } });
+    expect(updated.diagram?.node_refs.map((node) => node.status)).toEqual(["completed", "running", "pending"]);
+  });
 });