AI disclaimer: one shared component, shown where model output appears

"Freezmo uses AI and can make mistakes. Double-check important info."
(plus a natural informal Czech translation), rendered by a shared
AiDisclaimer so the copy, style and translations live in one place.

Placements — only where the model's words reach the screen:
- Chat: under the composer, below the context/model chips — always (chat
  is pure model output, so it also shows in the empty state).
- Make my homework: under the start CTA (desktop) and the mode cards'
  helper line (phone), plus once under the generated result for all three
  modes (make / check / guide).
- New deck wizard: under the summary helper (phone step 3) and the desktop
  CTA, next to Freeze my deck.
- AI grading (short answers): under the graded feedback; study, review and
  exam all share it.

Stored, already-generated content (deck page, study cards, explanations)
deliberately carries no note: the disclaimer belongs to the moment of
generation, not to browsing. Style: --text-subtle (documented at 5.6:1
light / 8.6:1 dark), 11.5px, centred, wraps to two lines at 360px, not
clickable, no icon.

Suites: chat (composer, phone + desktop), wizard (deck step 3 across
360/390 x en/cs x dark/light, homework start cards), phase3 (homework
trigger + result, phone + desktop), phase2 (stubbed grading feedback).
SW -> freezmo-v37. README: decision 50 + chat composer note.

Also fixes the deploy script's test instance: it now execs the server so
the cleanup kill reaps the real PID (the wrapper subshell left orphans
squatting on the test port — three from earlier sessions were found while
verifying this task), and the readiness poll checks the port serves the
NEW commit rather than just answering, so a leftover instance can never
be tested silently.

tests/phase2-test.mjs

@@ -73,6 +73,56 @@ const browser = await launchBrowser();
   await context.close();
 }
 
+/* 1b. AI grading feedback carries the disclaimer (stubbed model call) - */
+{
+  const { context, page } = await makePage(browser);
+  const shortDeck = {
+    ...DECK,
+    id: "seed_short",
+    title: "Short answers",
+    // Two activities on purpose: with one, grading ends the session and the
+    // results screen replaces the graded view before the check runs.
+    activities: [
+      {
+        type: "short_answer",
+        id: "s1",
+        xp: 10,
+        topic: "Sky",
+        question: "Why is the sky blue?",
+        referenceAnswer: "Rayleigh scattering favours short wavelengths.",
+        keyPoints: ["scattering", "short wavelengths"],
+        explanation: "Small molecules scatter blue light more than red.",
+      },
+      {
+        type: "multiple_choice",
+        id: "s2",
+        xp: 10,
+        topic: "Sky",
+        question: "Which colour scatters most?",
+        options: ["Blue", "Red", "Green", "Yellow"],
+        correctIndex: 0,
+        explanation: "Short wavelengths scatter more.",
+      },
+    ],
+  };
+  await page.route("**/api/grade", (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify({ correct: true, feedback: "Nice — scattering does the work.", missing: [] }),
+    }),
+  );
+  await seed(page, { decks: [shortDeck] });
+  await page.goto(`${BASE}/deck/seed_short`, { waitUntil: "networkidle" });
+  await page.waitForTimeout(1000);
+  await page.locator("textarea").fill("Because small molecules scatter blue light more.");
+  await page.getByRole("button", { name: "Submit answer" }).click();
+  await page.waitForTimeout(800);
+  check("grading: AI feedback rendered", await page.getByText("Nice — scattering does the work.").isVisible());
+  check("grading: AI disclaimer under the feedback", await page.getByText("Freezmo uses AI and can make mistakes").isVisible());
+  await context.close();
+}
+
 /* 2. SRS due → review session; stats screen -------------------------- */
 {
   const now = Date.now();