Promote AgentCompany-New to the repository root and retire the old app

The legacy application - its src, tests, landing site, promo assets, docs,
release tooling, CI workflows, and root configs - leaves the tree; it stays
reachable in history. Everything under AgentCompany-New moves up unchanged:
same package name, so the production userData/database path is untouched,
and e2e/build scripts already resolved paths relative to the project. The
developer cred.txt stays gitignored at its new location. Full verify:ci
passes from the new root.

tests/unit/search-service.test.ts

@@ -0,0 +1,97 @@
+import { randomUUID } from "node:crypto";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { describe, expect, test } from "vitest";
+import { DatabaseConnection } from "../../src/main/database/connection";
+import { ChatService } from "../../src/main/services/chat-service";
+import { OrganizationService } from "../../src/main/services/organization-service";
+import { SearchService } from "../../src/main/services/search-service";
+import { TASK_STATUS } from "../../src/shared/domain";
+import { createId } from "../../src/shared/ids";
+
+function createConnection(): DatabaseConnection {
+  return new DatabaseConnection(join(tmpdir(), `agentcompany-new-search-${randomUUID()}.db`));
+}
+
+describe("search service", () => {
+  test("returns faceted full-text results", () => {
+    const connection = createConnection();
+    const organization = new OrganizationService(connection.db);
+    const search = new SearchService(connection.db);
+    let orgId = "";
+    let employeeId = "";
+
+    connection.transaction(() => {
+      orgId = organization.createOrganization({
+        organizationName: "Acme Operations",
+        employeeName: "Dana Lee",
+        mission: "Coordinate agents with auditable approvals.",
+        goal: "Ship a verified control plane.",
+      });
+      employeeId = (connection.db.prepare("select id from employees where org_id = ?").get(orgId) as { id: string }).id;
+      organization.createTask({
+        orgId,
+        title: "Production deploy",
+        description: "Release the production deploy checklist.",
+        status: TASK_STATUS.BACKLOG,
+        assigneeAgentId: null,
+        risk: "high",
+        projectId: null,
+        goalId: null,
+        workspaceId: null,
+        priority: "normal",
+        requiresFilesystem: false,
+      });
+    });
+
+    const results = search.search({ orgId, employeeId, query: "production", entityTypes: ["task"] });
+    expect(results).toHaveLength(1);
+    expect(results[0]).toMatchObject({ entityType: "task", title: "Production deploy", facets: { type: "Work", risk: "high" } });
+    connection.close();
+  });
+
+  test("filters restricted chat messages by membership", () => {
+    const connection = createConnection();
+    const organization = new OrganizationService(connection.db);
+    const chat = new ChatService(connection.db);
+    const search = new SearchService(connection.db);
+    let orgId = "";
+    let ownerId = "";
+    let outsiderId = "";
+    let spaceId = "";
+
+    connection.transaction(() => {
+      orgId = organization.createOrganization({
+        organizationName: "Acme Operations",
+        employeeName: "Dana Lee",
+        mission: "Coordinate agents with auditable approvals.",
+        goal: "Ship a verified control plane.",
+      });
+      ownerId = (connection.db.prepare("select id from employees where org_id = ?").get(orgId) as { id: string }).id;
+      outsiderId = createId("emp");
+      connection.db.prepare("insert into employees(id, org_id, display_name, role, created_at) values (?, ?, ?, ?, ?)")
+        .run(outsiderId, orgId, "Riley Chen", "Observer", new Date().toISOString());
+      spaceId = chat.createSpace({
+        orgId,
+        spaceType: "project",
+        name: "restricted-release",
+        topic: "Need-to-know release",
+        visibility: "restricted",
+        memberEmployeeIds: [ownerId],
+      });
+      chat.sendMessage({
+        orgId,
+        spaceId,
+        threadId: null,
+        senderType: "employee",
+        senderId: ownerId,
+        bodyMd: "Secret launch window",
+        attachmentFileIds: [],
+      });
+    });
+
+    expect(search.search({ orgId, employeeId: ownerId, query: "secret", entityTypes: ["chat_message"] })).toHaveLength(1);
+    expect(search.search({ orgId, employeeId: outsiderId, query: "secret", entityTypes: ["chat_message"] })).toHaveLength(0);
+    connection.close();
+  });
+});