test(dashboard): add Playwright e2e scaffolding with smoke spec

Milestone A of the frontend test plan. Sets up the test rig — config,
globalSetup that probes the backend and seeds an admin session into
storageState, lightweight fixtures, and a 3-test smoke spec — without
yet covering any user journeys (those land in Milestone B).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

dashboard/tests/e2e/fixtures/api.ts

@@ -0,0 +1,47 @@
+import { request, type APIRequestContext } from '@playwright/test';
+import { promises as fs } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const API_BASE = process.env.E2E_API_BASE ?? 'http://127.0.0.1:18080';
+const STATE_PATH = path.join(__dirname, '..', '.auth', 'admin.json');
+
+interface StoredState {
+	origins: Array<{
+		origin: string;
+		localStorage: Array<{ name: string; value: string }>;
+	}>;
+}
+
+let cachedToken: string | null = null;
+
+async function readAdminToken(): Promise<string> {
+	if (cachedToken) return cachedToken;
+	const raw = await fs.readFile(STATE_PATH, 'utf8');
+	const state = JSON.parse(raw) as StoredState;
+	for (const origin of state.origins) {
+		const entry = origin.localStorage.find((e) => e.name === 'picloud.admin.token');
+		if (entry) {
+			cachedToken = entry.value;
+			return entry.value;
+		}
+	}
+	throw new Error(`No picloud.admin.token in ${STATE_PATH} — did globalSetup run?`);
+}
+
+// Thin wrapper around Playwright's request context that injects the
+// admin bearer token from the shared storageState. Use this for
+// setup/teardown shortcuts when the *test itself* is about something
+// else (e.g., a script-editor test that just needs an app to exist).
+export async function adminApi(): Promise<APIRequestContext> {
+	const token = await readAdminToken();
+	return request.newContext({
+		baseURL: API_BASE,
+		extraHTTPHeaders: {
+			authorization: `Bearer ${token}`,
+			'content-type': 'application/json'
+		}
+	});
+}