diff --git a/e2e/dashboard.spec.ts b/e2e/dashboard.spec.ts
new file mode 100644
index 000000000..5f2e445e6
--- /dev/null
+++ b/e2e/dashboard.spec.ts
@@ -0,0 +1,183 @@
+import { expect, test } from "@playwright/test";
+
+import { STORAGE_STATE_PATH } from "./setup/global-setup";
+
+/**
+ * Authenticated dashboard render — proves the seed user can reach the
+ * home dashboard and the core widgets paint without uncaught client
+ * errors.
+ *
+ * The dashboard self-gates each tile on (visible AND has data), so a
+ * fresh seed user with zero measurements would render an empty strip
+ * and skip all charts. Rather than seed measurements before this spec
+ * runs (which couples the spec to a particular signature of the
+ * `/api/measurements` shape), we mock `/api/analytics` and
+ * `/api/dashboard/widgets` to return a deterministic dataset. The
+ * widget layout + chart wrappers are pure enough that asserting on the
+ * mocked-data render exercises the same code paths as a real session.
+ */
+test.describe("authenticated dashboard render", () => {
+  test.use({ storageState: STORAGE_STATE_PATH });
+
+  test.beforeEach(async ({ page }) => {
+    // Mock analytics with a populated weight summary so the weight tile
+    // and chart render. `count` must be >0 for the tile to clear the
+    // data-floor gate in `src/app/page.tsx`.
+    await page.route("**/api/analytics", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: {
+            summaries: {
+              WEIGHT: {
+                latest: 78.5,
+                avg7: 78.2,
+                avg30: 77.9,
+                slope30: { slope: -0.05, direction: "down" },
+                count: 30,
+              },
+              BLOOD_PRESSURE_SYS: {
+                latest: 124,
+                avg7: 122,
+                avg30: 121,
+                slope30: { slope: 0.1, direction: "flat" },
+                count: 25,
+              },
+              BLOOD_PRESSURE_DIA: {
+                latest: 80,
+                avg7: 79,
+                avg30: 78,
+                slope30: { slope: 0.05, direction: "flat" },
+                count: 25,
+              },
+              PULSE: {
+                latest: 68,
+                avg7: 70,
+                avg30: 71,
+                slope30: { slope: -0.2, direction: "down" },
+                count: 25,
+              },
+            },
+            bpInTargetPct: 78,
+            glucoseByContext: {},
+          },
+          error: null,
+        }),
+      }),
+    );
+
+    await page.route("**/api/mood/analytics", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: { entries: [], summary: { count: 0 } },
+          error: null,
+        }),
+      }),
+    );
+
+    // The chart's per-type fetch reads `json.data.measurements` and
+    // expects a `meta.total`. Return a small dataset so the chart has
+    // points to plot — otherwise Recharts mounts a placeholder instead
+    // of the recharts-wrapper SVG and the assertion below times out.
+    await page.route("**/api/measurements*", (route) => {
+      const url = new URL(route.request().url());
+      const type = url.searchParams.get("type") ?? "WEIGHT";
+      const baseValue =
+        type === "BLOOD_PRESSURE_SYS"
+          ? 124
+          : type === "BLOOD_PRESSURE_DIA"
+            ? 80
+            : type === "PULSE"
+              ? 70
+              : 78.5;
+      const measurements = Array.from({ length: 10 }, (_, i) => ({
+        id: `m_${type}_${i}`,
+        type,
+        value: baseValue + (i % 3) - 1,
+        measuredAt: new Date(Date.now() - i * 86_400_000).toISOString(),
+        notes: null,
+      }));
+      return route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: { measurements, meta: { total: measurements.length } },
+          error: null,
+        }),
+      });
+    });
+
+    // The general-status insight card on /insights drives the "AI insight
+    // card" assertion. We mock its endpoint with a connected, populated
+    // payload so the card resolves to a real text body instead of the
+    // "Connect ChatGPT to enable" empty-state.
+    await page.route("**/api/insights/general-status*", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: {
+            hasProvider: true,
+            text: "Your blood-pressure trend is stable. Continue current routine.",
+            cached: false,
+            updatedAt: new Date().toISOString(),
+          },
+          error: null,
+        }),
+      }),
+    );
+  });
+
+  test("dashboard tile strip + chart + insight card render", async ({
+    page,
+  }) => {
+    const consoleErrors: string[] = [];
+    page.on("pageerror", (err) => {
+      consoleErrors.push(err.message);
+    });
+    page.on("console", (msg) => {
+      if (msg.type() === "error") consoleErrors.push(msg.text());
+    });
+
+    await page.goto("/", { waitUntil: "domcontentloaded" });
+
+    // Tile strip — `data-slot="dashboard-tile-strip"` is the stable hook
+    // the dashboard exposes. The component sets `data-tile-count` to the
+    // active tile count; assert it's >0 so we know at least one tile
+    // cleared the visibility + data-floor gate.
+    const strip = page.locator('[data-slot="dashboard-tile-strip"]');
+    await expect(strip).toBeVisible({ timeout: 10_000 });
+    const tileCount = Number(await strip.getAttribute("data-tile-count"));
+    expect(tileCount).toBeGreaterThan(0);
+
+    // At least one chart must render. Recharts mounts a `<svg>` with
+    // `class="recharts-surface"` (or a `<div class="recharts-wrapper">`
+    // around it). Use the recharts class so we don't accidentally match
+    // an aria-hidden lucide-react icon.
+    await expect(
+      page.locator(".recharts-wrapper, .recharts-surface").first(),
+    ).toBeVisible({ timeout: 10_000 });
+
+    // AI insight card: visit the dedicated /insights page (which is the
+    // only surface that mounts the general-status card by default).
+    await page.goto("/insights", { waitUntil: "domcontentloaded" });
+    await expect(
+      page.getByText("Your blood-pressure trend is stable", { exact: false }),
+    ).toBeVisible({ timeout: 10_000 });
+
+    // Filter out a small set of known-noise messages — we care about
+    // real React/JS uncaught errors only. 404s from optional assets
+    // (manifest icons, prefetched chunks for unrendered routes) are
+    // explicitly tolerated; they don't affect the dashboard render.
+    const significant = consoleErrors.filter(
+      (msg) =>
+        !/ResizeObserver loop|Download the React DevTools|Warning: |\[Fast Refresh\]|Failed to load resource|net::ERR_/i.test(
+          msg,
+        ),
+    );
+    expect(significant, significant.join("\n")).toEqual([]);
+  });
+});
diff --git a/e2e/measurement-flow.spec.ts b/e2e/measurement-flow.spec.ts
new file mode 100644
index 000000000..12493d915
--- /dev/null
+++ b/e2e/measurement-flow.spec.ts
@@ -0,0 +1,161 @@
+import { expect, test } from "@playwright/test";
+
+import { STORAGE_STATE_PATH } from "./setup/global-setup";
+
+/**
+ * Add-measurement flow — exercises the dashboard's quick-entry dropdown,
+ * the dialog-mounted MeasurementForm, the POST to /api/measurements, and
+ * the resulting query invalidation that surfaces the row on
+ * `/measurements`.
+ *
+ * Weight is the simplest type (single numeric input + datetime), so it
+ * keeps the spec focused on the round-trip rather than the BP three-field
+ * batched submit.
+ */
+test.describe("add measurement flow", () => {
+  test.use({ storageState: STORAGE_STATE_PATH });
+
+  test("creating a weight reading surfaces it in the list", async ({
+    page,
+  }) => {
+    // Capture the POST payload so we can assert against it independently
+    // of any list-fetch response Playwright might cache. Match both
+    // `/api/measurements` (POST creates a reading) and the list query
+    // `/api/measurements?type=...&limit=...&offset=...` (GET).
+    let postedBody: unknown = null;
+    await page.route("**/api/measurements*", async (route) => {
+      const req = route.request();
+      if (req.method() === "POST") {
+        postedBody = JSON.parse(req.postData() ?? "null");
+        await route.fulfill({
+          status: 200,
+          contentType: "application/json",
+          body: JSON.stringify({
+            data: { id: "m_e2e_1", success: true },
+            error: null,
+          }),
+        });
+        return;
+      }
+      // GET — return the just-posted reading so the list view shows it.
+      // The list expects `data.measurements: Measurement[]` plus
+      // `data.meta.total`; chart fetches use the same envelope.
+      const body = postedBody as {
+        type?: string;
+        value?: number;
+        measuredAt?: string;
+      } | null;
+      const measurements = body
+        ? [
+            {
+              id: "m_e2e_1",
+              type: body.type,
+              value: body.value,
+              measuredAt: body.measuredAt,
+              notes: null,
+            },
+          ]
+        : [];
+      await route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: { measurements, meta: { total: measurements.length } },
+          error: null,
+        }),
+      });
+    });
+
+    // Dashboard's analytics fetch — empty summaries are fine; we only
+    // need the page to render so we can click "Add".
+    await page.route("**/api/analytics", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: { summaries: {}, bpInTargetPct: null, glucoseByContext: {} },
+          error: null,
+        }),
+      }),
+    );
+    await page.route("**/api/mood/analytics", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          data: { entries: [], summary: { count: 0 } },
+          error: null,
+        }),
+      }),
+    );
+
+    await page.goto("/", { waitUntil: "domcontentloaded" });
+    await page.waitForLoadState("networkidle");
+
+    // Open the "Add" dropdown — the dashboard's quick-entry trigger sits
+    // at the top-right of `<main>`. Scope the locator there so we don't
+    // accidentally match an "Add" button on the sidebar.
+    const main = page.locator("main");
+    await main
+      .getByRole("button", { name: /^add$|hinzufügen|hinzufuegen/i })
+      .first()
+      .click();
+
+    // The Radix DropdownMenu mounts its content in a portal; the role
+    // is `menuitem`. Both items currently render the literal "Add" in
+    // EN (measurements.addMeasurement = "Add", mood.addEntry = "Add"),
+    // so we disambiguate by hitting the FIRST one — that's the
+    // measurement entry per the dashboard JSX order. Sub-optimal, but
+    // robust against the i18n collision we don't want to fix in this
+    // phase (would touch dashboard copy).
+    await page.getByRole("menuitem").first().click();
+
+    // Form should be visible inside the dialog. Switch type to WEIGHT
+    // (combo-box defaults to BLOOD_PRESSURE).
+    const dialog = page.getByRole("dialog");
+    await expect(dialog).toBeVisible();
+
+    // The Select trigger renders the current label — click to open and
+    // pick the weight option.
+    await dialog.getByRole("combobox").first().click();
+    await page
+      .getByRole("option", { name: /weight|gewicht/i })
+      .first()
+      .click();
+
+    // Weight is single-value mode — fill the value field with 78.4 kg.
+    const valueInput = dialog.locator("#value");
+    await valueInput.fill("78.4");
+
+    // Save
+    await dialog.getByRole("button", { name: /save|speichern/i }).click();
+
+    // Dialog closes when the mutation succeeds
+    await expect(dialog).toBeHidden({ timeout: 5_000 });
+
+    // Assert the POST went through with the expected shape
+    expect(postedBody).toMatchObject({
+      type: "WEIGHT",
+      value: 78.4,
+    });
+
+    // Navigate to the list and confirm the entry surfaces. The list
+    // page renders entries from /api/measurements which we've mocked
+    // to echo the just-posted row.
+    await page.goto("/measurements", { waitUntil: "domcontentloaded" });
+
+    // The list renders a desktop table AND a mobile card grid (one is
+    // hidden via `md:hidden`/`hidden md:block`). At least one match
+    // means our row landed in the DOM regardless of viewport.
+    await expect
+      .poll(
+        async () =>
+          await page
+            .locator("main")
+            .getByText(/78[.,]4/)
+            .count(),
+        { timeout: 10_000 },
+      )
+      .toBeGreaterThanOrEqual(1);
+  });
+});