Rename Foundry handoffs to tasks (#239)

* Restore foundry onboarding stack

* Consolidate foundry rename

* Create foundry tasks without prompts

* Rename Foundry handoffs to tasks

foundry/packages/backend/test/providers.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from "vitest";
+import { ConfigSchema, type AppConfig } from "@sandbox-agent/foundry-shared";
+import { createProviderRegistry } from "../src/providers/index.js";
+
+function makeConfig(): AppConfig {
+  return ConfigSchema.parse({
+    auto_submit: true,
+    notify: ["terminal"],
+    workspace: { default: "default" },
+    backend: {
+      host: "127.0.0.1",
+      port: 7741,
+      dbPath: "~/.local/share/foundry/task.db",
+      opencode_poll_interval: 2,
+      github_poll_interval: 30,
+      backup_interval_secs: 3600,
+      backup_retention_days: 7,
+    },
+    providers: {
+      local: {},
+      daytona: { image: "ubuntu:24.04" },
+    },
+  });
+}
+
+describe("provider registry", () => {
+  it("defaults to local when daytona is not configured", () => {
+    const registry = createProviderRegistry(makeConfig());
+    expect(registry.defaultProviderId()).toBe("local");
+  });
+
+  it("prefers daytona when an api key is configured", () => {
+    const registry = createProviderRegistry(
+      ConfigSchema.parse({
+        ...makeConfig(),
+        providers: {
+          ...makeConfig().providers,
+          daytona: {
+            ...makeConfig().providers.daytona,
+            apiKey: "test-token",
+          },
+        },
+      }),
+    );
+    expect(registry.defaultProviderId()).toBe("daytona");
+  });
+
+  it("returns the built-in provider", () => {
+    const registry = createProviderRegistry(makeConfig());
+    expect(registry.get("daytona").id()).toBe("daytona");
+  });
+});