move pi-mono into companion-cloud as apps/companion-os

- Copy all pi-mono source into apps/companion-os/
- Update Dockerfile to COPY pre-built binary instead of downloading from GitHub Releases
- Update deploy-staging.yml to build pi from source (bun compile) before Docker build
- Add apps/companion-os/** to path triggers
- No more cross-repo dispatch needed

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/ai/test/zen.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+import { MODELS } from "../src/models.generated.js";
+import { complete } from "../src/stream.js";
+import type { Model } from "../src/types.js";
+
+describe.skipIf(!process.env.OPENCODE_API_KEY)(
+  "OpenCode Models Smoke Test",
+  () => {
+    const providers = [
+      { key: "opencode", label: "OpenCode Zen" },
+      { key: "opencode-go", label: "OpenCode Go" },
+    ] as const;
+
+    providers.forEach(({ key, label }) => {
+      const providerModels = Object.values(MODELS[key]);
+      providerModels.forEach((model) => {
+        it(`${label}: ${model.id}`, async () => {
+          const response = await complete(model as Model<any>, {
+            messages: [
+              { role: "user", content: "Say hello.", timestamp: Date.now() },
+            ],
+          });
+
+          expect(response.content).toBeTruthy();
+          expect(response.stopReason).toBe("stop");
+        }, 60000);
+      });
+    });
+  },
+);