diff --git a/src/app/__tests__/sheet-dirty-check.test.ts b/src/app/__tests__/sheet-dirty-check.test.ts
new file mode 100644
index 000000000..188dc4fbb
--- /dev/null
+++ b/src/app/__tests__/sheet-dirty-check.test.ts
@@ -0,0 +1,140 @@
+/**
+ * v1.11.5 — `sheetBodyHasUnsavedInput` dirty-check coverage.
+ *
+ * The quick-entry sheets confirm-on-dismiss only when the body holds unsaved
+ * input. The original walk read `input` / `textarea` only, so a user who
+ * changed just the mood `role="radio"` selector or opened a Radix Select
+ * (type / medication) could lose the change on a backdrop dismiss with no
+ * confirm. These cases lock the extended detection in — and pin the
+ * over-trigger guard so a pristine sheet (no radio chosen, every Select on its
+ * default and closed) still reads clean.
+ *
+ * The repo runs vitest in the Node environment (no jsdom / happy-dom). The
+ * function only ever touches `document.querySelector` once (the sheet body) and
+ * then `body.querySelectorAll` / `body.querySelector` against three fixed
+ * selectors, so we drive it with a hand-rolled fake `document` that answers
+ * exactly those selectors — no DOM engine, matching the repo's node-only test
+ * convention (cf. the SSR-string tests elsewhere).
+ */
+import { afterEach, describe, expect, it } from "vitest";
+import { sheetBodyHasUnsavedInput } from "../page";
+
+const BODY_SELECTOR = '[data-slot="responsive-sheet-body"]';
+const MOOD_RADIO_SELECTOR = '[role="radio"][aria-checked="true"]';
+const OPEN_SELECT_SELECTOR = '[role="combobox"][data-state="open"]';
+
+interface FakeField {
+  type: string;
+  value?: string;
+  disabled?: boolean;
+  checked?: boolean;
+  defaultChecked?: boolean;
+}
+
+interface SheetFixture {
+  fields?: FakeField[];
+  moodRadioSelected?: boolean;
+  openSelect?: boolean;
+}
+
+/** Install a fake `document` whose queries answer the given fixture. */
+function installFakeDocument(fixture: SheetFixture | null): void {
+  const body = fixture
+    ? {
+        querySelectorAll: (sel: string) =>
+          sel === "input, textarea" ? (fixture.fields ?? []) : [],
+        querySelector: (sel: string) => {
+          if (sel === MOOD_RADIO_SELECTOR)
+            return fixture.moodRadioSelected ? {} : null;
+          if (sel === OPEN_SELECT_SELECTOR)
+            return fixture.openSelect ? {} : null;
+          return null;
+        },
+      }
+    : null;
+
+  (globalThis as { document?: unknown }).document = {
+    querySelector: (sel: string) => (sel === BODY_SELECTOR ? body : null),
+  };
+}
+
+afterEach(() => {
+  delete (globalThis as { document?: unknown }).document;
+});
+
+describe("sheetBodyHasUnsavedInput — mood radio", () => {
+  it("is clean when no mood radio is selected (pristine)", () => {
+    installFakeDocument({ moodRadioSelected: false });
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+
+  it("is dirty when a mood radio is selected", () => {
+    installFakeDocument({ moodRadioSelected: true });
+    expect(sheetBodyHasUnsavedInput()).toBe(true);
+  });
+});
+
+describe("sheetBodyHasUnsavedInput — Radix Select", () => {
+  it("is clean for a closed Select on its default value (no over-trigger)", () => {
+    // A measurement-type / medication Select mounts with a non-placeholder
+    // DEFAULT and is closed — a pristine sheet must NOT prompt the confirm.
+    installFakeDocument({ openSelect: false });
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+
+  it("is dirty while a Select dropdown is open (mid-interaction)", () => {
+    installFakeDocument({ openSelect: true });
+    expect(sheetBodyHasUnsavedInput()).toBe(true);
+  });
+});
+
+describe("sheetBodyHasUnsavedInput — text fields still honoured", () => {
+  it("is clean for an empty pristine sheet", () => {
+    installFakeDocument({
+      fields: [
+        { type: "text", value: "" },
+        { type: "textarea", value: "" },
+        { type: "datetime-local", value: "2026-06-04T08:00" },
+      ],
+    });
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+
+  it("is dirty when a text input carries a value", () => {
+    installFakeDocument({ fields: [{ type: "text", value: "75.5" }] });
+    expect(sheetBodyHasUnsavedInput()).toBe(true);
+  });
+
+  it("ignores a prefilled date/time picker (v1.11.4 H1)", () => {
+    installFakeDocument({
+      fields: [{ type: "datetime-local", value: "2026-06-04T08:00" }],
+    });
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+
+  it("ignores a disabled field carrying a value", () => {
+    installFakeDocument({
+      fields: [{ type: "text", value: "ignored", disabled: true }],
+    });
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+
+  it("is dirty for a native checkbox toggled off its default", () => {
+    installFakeDocument({
+      fields: [{ type: "checkbox", checked: true, defaultChecked: false }],
+    });
+    expect(sheetBodyHasUnsavedInput()).toBe(true);
+  });
+});
+
+describe("sheetBodyHasUnsavedInput — no sheet body", () => {
+  it("is clean when no sheet body is mounted", () => {
+    installFakeDocument(null);
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+
+  it("is clean when document is undefined (SSR)", () => {
+    delete (globalThis as { document?: unknown }).document;
+    expect(sheetBodyHasUnsavedInput()).toBe(false);
+  });
+});
diff --git a/src/app/page.tsx b/src/app/page.tsx
index b98f7b105..6aec28a80 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -88,7 +88,7 @@ const PREFILLED_PICKER_TYPES = new Set([
   "month",
   "week",
 ]);
-function sheetBodyHasUnsavedInput(): boolean {
+export function sheetBodyHasUnsavedInput(): boolean {
   if (typeof document === "undefined") return false;
   const body = document.querySelector<HTMLElement>(
     '[data-slot="responsive-sheet-body"]',
@@ -109,6 +109,30 @@ function sheetBodyHasUnsavedInput(): boolean {
     }
     if (field.value.trim() !== "") return true;
   }
+  // v1.11.5 — the input/textarea walk misses two non-text controls a user can
+  // change before dismissing: the mood `role="radio"` selector and a Radix
+  // Select (measurement type / medication). Losing either silently on a
+  // backdrop-dismiss is the same data-loss class the H1 confirm-on-dirty guard
+  // was meant to close.
+  //
+  // Mood radios start with nothing selected (`mood = ""`), so ANY
+  // `aria-checked="true"` is a deliberate user choice — flag it.
+  if (
+    body.querySelector('[role="radio"][aria-checked="true"]') !== null
+  ) {
+    return true;
+  }
+  // Radix Select trigger renders `role="combobox"`. A trigger with
+  // `data-state="open"` is mid-interaction (the dropdown is up) — the user is
+  // actively choosing, so a dismiss should confirm rather than drop the pick.
+  // We deliberately do NOT treat a merely non-placeholder value as dirty: the
+  // type / medication selects mount with a non-placeholder DEFAULT, and
+  // flagging that would over-trigger the confirm on a pristine sheet.
+  if (
+    body.querySelector('[role="combobox"][data-state="open"]') !== null
+  ) {
+    return true;
+  }
   return false;
 }