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/provider-models-fetch.test.ts

@@ -0,0 +1,58 @@
+import { randomUUID } from "node:crypto";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { describe, expect, test } from "vitest";
+import { mapAnthropicModels, mapOpenAiModels } from "../../src/main/services/provider-models-fetch";
+import { DatabaseConnection } from "../../src/main/database/connection";
+import { ProviderService } from "../../src/main/services/provider-service";
+import { providerAdapters } from "../../src/main/services/provider-adapters";
+
+const testVault = {
+  encryptSecret: (secret: string) => Buffer.from(secret, "utf8"),
+  decryptSecret: (ciphertext: Buffer) => ciphertext.toString("utf8"),
+};
+
+describe("provider model-list mapping", () => {
+  test("maps the OpenAI /models shape, deduping by id", () => {
+    const models = mapOpenAiModels({ data: [{ id: "gpt-x" }, { id: "gpt-y" }, { id: "gpt-x" }, { id: "" }, { other: 1 }] });
+    expect(models).toEqual([{ id: "gpt-x", name: "gpt-x" }, { id: "gpt-y", name: "gpt-y" }]);
+  });
+
+  test("maps the Anthropic /models shape, preferring display_name", () => {
+    const models = mapAnthropicModels({ data: [{ id: "claude-x", display_name: "Claude X" }, { id: "claude-y" }] });
+    expect(models).toEqual([{ id: "claude-x", name: "Claude X" }, { id: "claude-y", name: "claude-y" }]);
+  });
+
+  test("throws on a malformed response instead of returning a static list", () => {
+    expect(() => mapOpenAiModels({})).toThrow(/expected shape/);
+    expect(() => mapOpenAiModels({ data: [] })).toThrow(/no models/);
+    expect(() => mapAnthropicModels({ data: [{ id: "" }] })).toThrow(/no models/);
+  });
+});
+
+describe("ProviderService.listModels routing", () => {
+  test("routes a typed credential to the matching adapter and returns its live models", async () => {
+    const connection = new DatabaseConnection(join(tmpdir(), `ac-models-${randomUUID()}.db`));
+    let parsedSecret = "";
+    const fakeAdapter = {
+      ...providerAdapters.openai,
+      authType: "api_key" as const,
+      parseAuthProfile: (secret: string) => { parsedSecret = secret; return { type: "api_key" as const, apiKey: secret }; },
+      listModels: async () => [{ id: "live-1", name: "live-1" }, { id: "live-2", name: "live-2" }],
+    };
+    const registry = { ...providerAdapters, openai: fakeAdapter };
+    const service = new ProviderService(connection.db, registry, testVault);
+
+    const models = await service.listModels({ providerKey: "openai", secret: "sk-live-key" });
+    expect(parsedSecret).toBe("sk-live-key");
+    expect(models).toEqual([{ id: "live-1", name: "live-1" }, { id: "live-2", name: "live-2" }]);
+    connection.close();
+  });
+
+  test("requires a credential reference when no secret is provided", async () => {
+    const connection = new DatabaseConnection(join(tmpdir(), `ac-models-${randomUUID()}.db`));
+    const service = new ProviderService(connection.db, providerAdapters, testVault);
+    await expect(service.listModels({ providerKey: "openai" })).rejects.toThrow(/credential is required/);
+    connection.close();
+  });
+});