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.

src/main/services/provider-models-fetch.ts

@@ -0,0 +1,51 @@
+import type { ProviderModelEntry } from "../../shared/provider-models";
+import { getJson, type JsonRecord } from "./provider-http";
+
+/**
+ * Live model-list fetching. Each provider that exposes a standard models
+ * endpoint (OpenAI `/v1/models`, Anthropic `/v1/models`) returns its current
+ * catalog; we map it to {id, name} with no curation and no fabricated entries.
+ * An empty or malformed response throws — the caller surfaces the real error
+ * rather than falling back to a stale static list.
+ */
+
+export function mapOpenAiModels(data: unknown): ProviderModelEntry[] {
+  return collectModels(data, (item, id) => ({ id, name: id }));
+}
+
+export function mapAnthropicModels(data: unknown): ProviderModelEntry[] {
+  return collectModels(data, (item, id) => ({
+    id,
+    name: typeof item.display_name === "string" && item.display_name.trim() ? item.display_name.trim() : id,
+  }));
+}
+
+export async function fetchOpenAiModels(modelsUrl: string, headers: Record<string, string>): Promise<ProviderModelEntry[]> {
+  const response = await getJson(modelsUrl, headers);
+  return mapOpenAiModels(response.data);
+}
+
+export async function fetchAnthropicModels(modelsUrl: string, headers: Record<string, string>): Promise<ProviderModelEntry[]> {
+  const response = await getJson(modelsUrl, headers);
+  return mapAnthropicModels(response.data);
+}
+
+function collectModels(data: unknown, toEntry: (item: JsonRecord, id: string) => ProviderModelEntry): ProviderModelEntry[] {
+  const list = isRecord(data) && Array.isArray(data.data) ? data.data : null;
+  if (!list) throw new Error("Provider model list response was not in the expected shape.");
+  const entries: ProviderModelEntry[] = [];
+  const seen = new Set<string>();
+  for (const item of list) {
+    if (!isRecord(item)) continue;
+    const id = typeof item.id === "string" ? item.id.trim() : "";
+    if (!id || seen.has(id)) continue;
+    seen.add(id);
+    entries.push(toEntry(item, id));
+  }
+  if (entries.length === 0) throw new Error("Provider returned no models.");
+  return entries;
+}
+
+function isRecord(value: unknown): value is JsonRecord {
+  return typeof value === "object" && value !== null && !Array.isArray(value);
+}