fix(02-01): record archi-dev-box baseline; harden harness against cascade

- 02-PERF-BASELINE.json: on-device baseline recorded against archi-dev-box
  (real hardware, D-11's verification target). 13/15 surfaces measured
  cleanly across 3 runs each; Mesh and Chat are recorded as unmeasured with
  their reasons (Mesh: no connected mesh device on this node within the
  wait window; Chat: AIUI's own loading overlay outlives the close-button
  click budget) rather than silently marked already-fast, per plan rule.
- measure.ts: goHome() now falls back to a hard `page.goto('/dashboard')`
  when the Chat surface's own close button is unreachable (blocked behind
  AIUI's connecting overlay on real hardware) — without this, every
  surface after Chat inherited a permanently hidden sidebar
  (`v-show="!chatFullscreen"`) and cascaded to unmeasured. This recovery
  path is exempted from the "no page.goto between surfaces" rule because
  it exists only to break out of a stuck state, not to measure one.
- surface-perf.spec.ts: currentCommit() now shells out with `process.cwd()`
  instead of `__dirname`, which is unavailable under this package's
  `"type": "module"` runtime and was silently recording every run header's
  `commit` field as 'unknown'.

No file under neode-ui/src/ was modified by this task (git diff --name-only
HEAD -- neode-ui/src is empty).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/e2e/perf/measure.ts

@@ -231,10 +231,24 @@ async function dismissOverlays(page: Page): Promise<void> {
 async function goHome(page: Page, timeoutMs: number): Promise<void> {
   // DashboardSidebar.vue is `v-show="!chatFullscreen"` — if a prior surface's
   // run ended sitting on /dashboard/chat (e.g. chat's own revisit re-opened
-  // it as its last step), the sidebar is hidden and unclickable. Back out of
-  // chat first so the sidebar reappears before relying on it below.
+  // it as its last step, or a prior run errored out mid-chat), the sidebar is
+  // hidden and unclickable. Back out of chat first so the sidebar reappears
+  // before relying on it below.
   if (new URL(page.url()).pathname === '/dashboard/chat') {
-    await page.locator('.chat-close-btn').first().click({ timeout: timeoutMs }).catch(() => {})
+    const closed = await page
+      .locator('.chat-close-btn')
+      .first()
+      .click({ timeout: 5_000 })
+      .then(() => true)
+      .catch(() => false)
+    // On real AIUI hardware the close pill can sit behind AIUI's own
+    // "connecting" overlay for longer than any reasonable click budget — if
+    // the close button itself is unreachable, this is a recovery path, not a
+    // measurement, so a hard reload to break out is preferable to leaving
+    // every remaining surface stuck behind a permanently hidden sidebar.
+    if (!closed) {
+      await page.goto('/dashboard', { waitUntil: 'domcontentloaded' }).catch(() => {})
+    }
   }
   await clickWithGuard(page, '[data-controller-zone="sidebar"] a[href="/dashboard"]', timeoutMs)
   await page.waitForURL((url) => url.pathname === '/dashboard', { timeout: timeoutMs })

neode-ui/e2e/perf/surface-perf.spec.ts

@@ -39,7 +39,12 @@ async function login(page: Page): Promise<void> {
 
 function currentCommit(): string {
   try {
-    return execSync('git rev-parse --short HEAD', { cwd: __dirname }).toString().trim()
+    // `__dirname` is unavailable under this package's `"type": "module"` ESM
+    // runtime (Playwright's own transform swallows the ReferenceError into
+    // the catch below, silently yielding 'unknown') — use `process.cwd()`
+    // instead, which Playwright always sets to the project root it was
+    // invoked from.
+    return execSync('git rev-parse --short HEAD', { cwd: process.cwd() }).toString().trim()
   } catch {
     return 'unknown'
   }