diff --git a/src/components/insights/__tests__/recommendations-grid-integration.test.tsx b/src/components/insights/__tests__/recommendations-grid-integration.test.tsx
new file mode 100644
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+++ b/src/components/insights/__tests__/recommendations-grid-integration.test.tsx
@@ -0,0 +1,175 @@
+import { describe, it, expect, vi } from "vitest";
+import { renderToStaticMarkup } from "react-dom/server";
+
+import { I18nProvider } from "@/lib/i18n/context";
+import { InsightAdvisorCard } from "../insight-advisor-card";
+import type { InsightResult, InsightRecommendation } from "@/lib/ai/types";
+
+/**
+ * v1.4.16 phase B1b — full-flow integration: rationale (B5c) +
+ * confidence (B5d) + feedback (B5e) + grid wrapper (B1b) all paint
+ * together inside InsightAdvisorCard.
+ *
+ * The B5c report flagged that an e2e couldn't be added because
+ * `/insights` doesn't currently mount InsightAdvisorCard in the
+ * production tree. This integration test exercises the same surface
+ * via SSR and pins the cross-feature interaction so the rec card
+ * shell + per-card affordances all render in the right slots when
+ * the polished grid sits between InsightAdvisorCard and the
+ * RecommendationCard.
+ */
+
+vi.mock("@/components/charts/health-chart", () => ({
+  HealthChart: ({
+    types,
+    mini,
+    windowOverride,
+  }: {
+    types: string[];
+    mini?: boolean;
+    windowOverride?: string;
+  }) => (
+    <div
+      data-testid="health-chart"
+      data-types={types.join(",")}
+      data-mini={mini ? "true" : "false"}
+      data-window={windowOverride ?? ""}
+    />
+  ),
+}));
+vi.mock("@/components/charts/mood-chart", () => ({
+  MoodChart: ({ mini }: { mini?: boolean }) => (
+    <div data-testid="mood-chart" data-mini={mini ? "true" : "false"} />
+  ),
+}));
+vi.mock("@tanstack/react-query", () => ({
+  useQuery: () => ({ data: null, isLoading: false }),
+  useMutation: () => ({
+    mutate: vi.fn(),
+    isPending: false,
+    isSuccess: false,
+    isError: false,
+    error: null,
+  }),
+  useQueryClient: () => ({ invalidateQueries: vi.fn() }),
+}));
+vi.mock("@/hooks/use-auth", () => ({
+  useAuth: () => ({
+    user: { id: "test-user", username: "tester", role: "USER" },
+    isAuthenticated: true,
+    isLoading: false,
+  }),
+}));
+
+function rec(
+  id: string,
+  severity: "info" | "suggestion" | "important" | "urgent",
+  text: string,
+  confidence: number,
+): InsightRecommendation {
+  return {
+    id,
+    text,
+    severity,
+    confidence,
+    rationale: {
+      dataWindow: "last7days",
+      comparedTo: "your 90-day median",
+      deviation: "moderate deviation",
+    },
+    metricSource: {
+      type: "weight",
+      timeRange: "last7days",
+      summary: "84.2 kg avg over 7 days",
+    },
+  };
+}
+
+function buildInsight(
+  recommendations: InsightRecommendation[],
+): InsightResult {
+  return {
+    insightType: "general",
+    summary: "Test summary",
+    classification: "gut",
+    classificationLabel: "Good",
+    findings: [],
+    correlations: [],
+    primaryRecommendation: "",
+    recommendations,
+    dataQuality: { coverage: "good", gaps: [], confidence: "hoch" },
+    disclaimer: "Not medical advice.",
+  };
+}
+
+describe("InsightAdvisorCard + RecommendationsGrid full flow (B1b)", () => {
+  it("severity-orders the grid then paints confidence + feedback slots per card", () => {
+    const recs = [
+      rec("a", "info", "info-text", 22),
+      rec("b", "urgent", "urgent-text", 88),
+      rec("c", "suggestion", "suggestion-text", 60),
+    ];
+    const html = renderToStaticMarkup(
+      <I18nProvider initialLocale="en">
+        <InsightAdvisorCard title="full flow" insight={buildInsight(recs)} />
+      </I18nProvider>,
+    );
+
+    // Grid wrapper present.
+    expect(html).toMatch(/data-slot="rec-grid"/);
+
+    // urgent appears before info in the rendered HTML.
+    expect(html.indexOf("urgent-text")).toBeLessThan(html.indexOf("info-text"));
+    expect(html.indexOf("urgent-text")).toBeGreaterThan(-1);
+
+    // Each card carries the named slots from B5c/d/e.
+    expect(html).toMatch(/data-slot="rec-confidence-slot"/);
+    expect(html).toMatch(/data-slot="confidence-meter"/);
+
+    // Severity-coloured borders all rendered (red, purple, cyan for the
+    // three severities we shipped).
+    expect(html).toMatch(/border-l-dracula-red/);
+    expect(html).toMatch(/border-l-dracula-purple/);
+    expect(html).toMatch(/border-l-dracula-cyan/);
+
+    // 3 stagger indices on the wrapper rows.
+    expect(html).toMatch(/data-stagger-index="0"/);
+    expect(html).toMatch(/data-stagger-index="1"/);
+    expect(html).toMatch(/data-stagger-index="2"/);
+  });
+
+  it("confidence below 25 swaps the meter for a draft pill (still respects sort order)", () => {
+    const recs = [
+      rec("a", "important", "important-text", 80),
+      rec("b", "urgent", "urgent-text", 12), // draft
+    ];
+    const html = renderToStaticMarkup(
+      <I18nProvider initialLocale="en">
+        <InsightAdvisorCard
+          title="draft"
+          insight={buildInsight(recs)}
+        />
+      </I18nProvider>,
+    );
+
+    // Urgent rec still sorts first even with low confidence.
+    expect(html.indexOf("urgent-text")).toBeLessThan(
+      html.indexOf("important-text"),
+    );
+    // Draft pill renders for confidence < 25.
+    expect(html).toMatch(/data-slot="confidence-meter"/);
+    expect(html).toContain("Draft");
+  });
+
+  it("renders an empty grid when there are no recommendations", () => {
+    const html = renderToStaticMarkup(
+      <I18nProvider initialLocale="en">
+        <InsightAdvisorCard title="empty" insight={buildInsight([])} />
+      </I18nProvider>,
+    );
+    // Grid is unmounted entirely when recs.length is 0.
+    expect(html).not.toContain('data-slot="rec-grid"');
+    // Recommendations heading not rendered without content underneath.
+    expect(html).not.toContain("Recommendations");
+  });
+});