FN-5849: shard dashboard quality Vitest runs

Split the dashboard quality Vitest lane into bounded heap-managed shards to avoid signal exits.

- replace the single dashboard quality test command with sequential app and API shard scripts
- add a heap wrapper plus Vitest config shard definitions for foundation, component, App, ChatView, and SettingsModal coverage
- add guard tests for the sharded dashboard test configuration and restore spinner-animation.css.test.ts to foundation-ui coverage
- update the CLI package-config test expectations for the new dashboard test script layout

Files changed:
 packages/cli/src/__tests__/package-config.test.ts  |   8 +-
 packages/dashboard/package.json                    |  18 +-
 packages/dashboard/scripts/run-vitest-with-heap.mjs     |  41 ++++
 packages/dashboard/src/__tests__/dashboard-test-config-guard.test.ts  |  77 ++++++
 packages/dashboard/vitest.config.ts                | 273 ++++++++++++++++++++-
 5 files changed, 407 insertions(+), 10 deletions(-)

Fusion-Task-Id: FN-5849

Fusion-Task-Lineage: 522f3963-4647-4a59-bb6b-a3dacfbf620e

packages/dashboard/scripts/run-vitest-with-heap.mjs

@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+/* global clearInterval, console, process, setInterval */
+
+import { spawn } from "node:child_process";
+const rawArgs = process.argv.slice(2);
+const heapArg = rawArgs.find((arg) => arg.startsWith("--heap="));
+const heapMb = heapArg?.slice("--heap=".length) || "6144";
+const vitestArgs = rawArgs.filter((arg) => !arg.startsWith("--heap="));
+
+if (vitestArgs.length === 0) {
+  console.error("Usage: node scripts/run-vitest-with-heap.mjs [--heap=6144] <vitest args...>");
+  process.exit(1);
+}
+
+const nodeOptions = [`--max-old-space-size=${heapMb}`, process.env.NODE_OPTIONS || ""]
+  .join(" ")
+  .trim();
+const child = spawn("pnpm", ["exec", "vitest", ...vitestArgs], {
+  stdio: "inherit",
+  env: { ...process.env, NODE_OPTIONS: nodeOptions },
+});
+
+const heartbeat = setInterval(() => {
+  console.log(`[dashboard-vitest] still running: ${vitestArgs.join(" ")}`);
+}, 5_000);
+
+const forwardSignal = (signal) => {
+  child.kill(signal);
+};
+
+process.on("SIGINT", () => forwardSignal("SIGINT"));
+process.on("SIGTERM", () => forwardSignal("SIGTERM"));
+
+child.on("close", (code, signal) => {
+  clearInterval(heartbeat);
+  if (signal) {
+    process.kill(process.pid, signal);
+    return;
+  }
+  process.exit(code ?? 1);
+});