test(qa): 4 new gates for approvals + documents + llm-proxy chain

- approvals_scene_renders_queue (rows > 0)
- approvals_detail_shows_active_step_with_actions (title + actions > 0)
- documents_scene_renders_data_definitions (rows > 0)
- llm_proxy_chain_returns_503_without_provider_key (real network round-
  trip through canvas nginx -> in-cluster proxy -> 503 because no
  OPENAI_API_KEY / ANTHROPIC_API_KEY is set)

Full dogfood: 36/36 green.

qa/full_dogfood.mjs

@@ -295,6 +295,46 @@ record(
   `threads=${threadRowCount}, previews=${previewRows}, times=${timeBadges}`
 );
 
+// 18. APPROVALS scene loads with tenant-scoped queue + clickable rows.
+await p.goto("https://canvas.flow-master.ai/", { waitUntil: "networkidle" }).catch(() => {});
+await p.waitForTimeout(600);
+await p.locator(".hub-chip", { hasText: /Approvals queue/ }).click().catch(() => {});
+await p.waitForSelector(".approvals-row", { timeout: 15000 }).catch(() => {});
+await p.waitForTimeout(1000);
+const approvalsRows = await p.locator(".approvals-row").count();
+record("approvals_scene_renders_queue", approvalsRows > 0, `rows=${approvalsRows}`);
+if (approvalsRows > 0) {
+  await p.locator(".approvals-row").first().click();
+  await p.waitForSelector(".approvals-card", { timeout: 8000 }).catch(() => {});
+  await p.waitForTimeout(600);
+  const cardTitle = (await p.locator(".approvals-card-title").first().textContent()) || "";
+  const actionBtns = await p.locator(".approvals-actions .btn").count();
+  record(
+    "approvals_detail_shows_active_step_with_actions",
+    cardTitle.trim().length > 0 && actionBtns > 0,
+    `step="${cardTitle.trim().slice(0, 40)}" actions=${actionBtns}`
+  );
+}
+
+// 19. DOCUMENTS scene loads with EA2-sourced data definitions.
+await p.goto("https://canvas.flow-master.ai/", { waitUntil: "networkidle" }).catch(() => {});
+await p.waitForTimeout(600);
+await p.locator(".hub-chip", { hasText: /^Documents$/ }).click().catch(() => {});
+await p.waitForSelector(".docs-row", { timeout: 20000 }).catch(() => {});
+await p.waitForTimeout(1500);
+const docsRows = await p.locator(".docs-row").count();
+record("documents_scene_renders_data_definitions", docsRows > 0, `rows=${docsRows}`);
+
+// 20. LLM proxy is reachable through canvas nginx; returns 503 without provider.
+const llmRes = await p.request.post("https://canvas.flow-master.ai/internal/canvas-llm/chat", {
+  data: { messages: [{ role: "user", content: "ping" }] },
+});
+record(
+  "llm_proxy_chain_returns_503_without_provider_key",
+  llmRes.status() === 503,
+  `HTTP ${llmRes.status()}`
+);
+
 // Summarise
 const fails = results.filter((r) => !r.ok);
 console.log(`\n=== ${results.length - fails.length}/${results.length} passed ===`);