fix(charts): split mood-chart empty-state copy on raw entry count

Mirrors the health-chart fix. The mood-analytics endpoint already
exposes `entries[].samples` per calendar day, so summing it yields
the true raw mood-entry count for the window. When chartData
collapses to < 3 daily buckets but the raw count is ≥ 3, paint the
new "More distinct days needed" copy instead of the misleading "log
at least 3 entries" hint.

Pin both branches with an SSR test that mocks the analytics fetch.

src/components/charts/__tests__/mood-chart-empty-state-gate.test.tsx

@@ -0,0 +1,94 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { renderToStaticMarkup } from "react-dom/server";
+
+/**
+ * v1.4.43 W2-CHART-GATE — mood-chart empty-state copy split.
+ *
+ * `chartData` collapses entries to one point per calendar day, so a
+ * user with many mood entries on < 3 distinct days saw the legacy
+ * "log more entries" copy despite having logged plenty. The gate now
+ * keys on `rawCount = Σ entries[].samples` so the second message
+ * paints when the user only needs more spread across days.
+ */
+
+vi.mock("@/hooks/use-auth", () => ({
+  useAuth: () => ({
+    isAuthenticated: true,
+    user: null,
+    isLoading: false,
+  }),
+}));
+
+describe("<MoodChart> — empty-state gate by raw count", () => {
+  beforeEach(() => {
+    vi.resetModules();
+  });
+
+
+  it("renders need-more-days copy when chartData.length < 3 but rawCount >= 3", async () => {
+    const data = {
+      entries: [
+        { date: "2026-05-19", score: 4, samples: 25 },
+        { date: "2026-05-20", score: 5, samples: 25 },
+      ],
+      trend: null,
+    };
+
+    vi.doMock("@tanstack/react-query", () => ({
+      useQuery: () => ({ data, isLoading: false }),
+      useQueryClient: () => ({
+        cancelQueries: () => Promise.resolve(),
+        getQueryData: () => undefined,
+        setQueryData: () => undefined,
+        invalidateQueries: () => Promise.resolve(),
+      }),
+      useMutation: () => ({ mutate: () => undefined, isPending: false }),
+    }));
+
+    const { I18nProvider } = await import("@/lib/i18n/context");
+    const { MoodChart } = await import("../mood-chart");
+
+    const html = renderToStaticMarkup(
+      <I18nProvider initialLocale="de">
+        <MoodChart />
+      </I18nProvider>,
+    );
+
+    expect(html).toContain("Mehr Messtage erforderlich");
+    expect(html).not.toContain("Erfasse mindestens 3 Einträge");
+
+    vi.doUnmock("@tanstack/react-query");
+  });
+
+  it("renders no-data copy when rawCount < 3", async () => {
+    const data = {
+      entries: [{ date: "2026-05-20", score: 4, samples: 1 }],
+      trend: null,
+    };
+
+    vi.doMock("@tanstack/react-query", () => ({
+      useQuery: () => ({ data, isLoading: false }),
+      useQueryClient: () => ({
+        cancelQueries: () => Promise.resolve(),
+        getQueryData: () => undefined,
+        setQueryData: () => undefined,
+        invalidateQueries: () => Promise.resolve(),
+      }),
+      useMutation: () => ({ mutate: () => undefined, isPending: false }),
+    }));
+
+    const { I18nProvider } = await import("@/lib/i18n/context");
+    const { MoodChart } = await import("../mood-chart");
+
+    const html = renderToStaticMarkup(
+      <I18nProvider initialLocale="de">
+        <MoodChart />
+      </I18nProvider>,
+    );
+
+    expect(html).toContain("Erfasse mindestens 3 Einträge");
+    expect(html).not.toContain("Mehr Messtage erforderlich");
+
+    vi.doUnmock("@tanstack/react-query");
+  });
+});

src/components/charts/mood-chart.tsx

@@ -340,6 +340,20 @@ export function MoodChart({
     refetchOnWindowFocus: false,
   });
 
+  // v1.4.43 W2-CHART-GATE — raw mood-entry count across every day in
+  // the window. `entries[].samples` carries the per-day raw count
+  // straight from the analytics endpoint; summing it produces the
+  // total entries the user logged, independent of how many calendar
+  // days they hit. Used by the empty-state gate to distinguish "few
+  // entries" from "few days".
+  const rawCount = useMemo<number>(() => {
+    if (!data?.entries?.length) return 0;
+    return data.entries.reduce(
+      (acc, entry) => acc + (Number.isFinite(entry.samples) ? entry.samples : 0),
+      0,
+    );
+  }, [data]);
+
   const chartData = useMemo((): ChartDataPoint[] | undefined => {
     if (!data?.entries?.length) return undefined;
 
@@ -682,11 +696,25 @@ export function MoodChart({
           // shared CHART_HEIGHT_PX so the empty state preserves the
           // trend-row rhythm (v1.4.27 — was 280, now 240 to match every
           // other dashboard chart card).
-          <ChartEmptyState
-            title={t("charts.emptyStateTitle")}
-            description={t("charts.emptyStateDescription")}
-            height={CHART_HEIGHT_PX}
-          />
+          //
+          // v1.4.43 W2-CHART-GATE — split the copy on the raw mood-entry
+          // count. A user with 50 mood entries across 2 calendar days
+          // sees `chartData.length = 2` (daily-aggregated) but the raw
+          // count (sum of `samples`) is 50. Surface "need more days"
+          // in that scenario so the call-to-action matches reality.
+          rawCount >= 3 ? (
+            <ChartEmptyState
+              title={t("charts.needMoreDistinctDaysTitle")}
+              description={t("charts.needMoreDistinctDaysDescription")}
+              height={CHART_HEIGHT_PX}
+            />
+          ) : (
+            <ChartEmptyState
+              title={t("charts.emptyStateTitle")}
+              description={t("charts.emptyStateDescription")}
+              height={CHART_HEIGHT_PX}
+            />
+          )
         ) : (
           <div
             className={`${