feat: T4 wave 10 – bottling quality, phenology and honey chain UI, Telegram link/receive and ops

- Bottling quality: water content above the legal limit (strict >) answers
  409 CONFIRMATION_REQUIRED bound to the measured value; prefill for jar
  size, best-before (shelfLifeMonths, month-end clamping) and water content;
  impossible dates give 400; water-content checks in src/common/quality.
- Frontend phenology: "Entwicklung melden" sheet, IndexedDB v4 queue,
  season header on the apiary page, confirmed revoke for all apiaries.
- Frontend honey chain: "Vorschlag aus …" hints with explicit take-over,
  prefill status note, movement ledger with withdraw/correct dialogs.
- Telegram: link tokens (hashed, single use), private-chat receiver with
  lease and offset CAS, bounded poison-update skip, Retry-After, pending
  deliveries skipped on disconnect; system API for deliveries and retry;
  worker-only secret wiring and manifest policy tests.
- ARCHITECTURE.md §7, §9, §10, §11.11–11.13, Annahmen 51–55.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/src/notifications/notification-preferences.service.spec.ts

@@ -31,6 +31,7 @@ describe('NotificationPreferencesService', () => {
   };
   let prisma: {
     notificationPreference: { upsert: jest.Mock };
+    telegramLink: { findUnique: jest.Mock };
     $transaction: jest.Mock;
   };
   const order: string[] = [];
@@ -62,6 +63,7 @@ describe('NotificationPreferencesService', () => {
       notificationPreference: {
         upsert: jest.fn().mockResolvedValue(stored),
       },
+      telegramLink: { findUnique: jest.fn().mockResolvedValue(null) },
       $transaction: jest
         .fn()
         .mockImplementation((work: (t: unknown) => Promise<unknown>) =>
@@ -180,4 +182,75 @@ describe('NotificationPreferencesService', () => {
     expect(arg.data).not.toHaveProperty('telegramEnabled');
     expect(arg.data.telegramCategories).toEqual(['SYSTEM']);
   });
+  describe('toView (Telegram status)', () => {
+    const originalUsername = process.env.TELEGRAM_BOT_USERNAME;
+    const originalToken = process.env.TELEGRAM_BOT_TOKEN;
+
+    afterEach(() => {
+      if (originalUsername === undefined) {
+        delete process.env.TELEGRAM_BOT_USERNAME;
+      } else {
+        process.env.TELEGRAM_BOT_USERNAME = originalUsername;
+      }
+      if (originalToken === undefined) {
+        delete process.env.TELEGRAM_BOT_TOKEN;
+      } else {
+        process.env.TELEGRAM_BOT_TOKEN = originalToken;
+      }
+    });
+
+    it('NotificationSettingsView.telegram.configured is true with the username set and no token in the API process', async () => {
+      process.env.TELEGRAM_BOT_USERNAME = '@apicore_test_bot';
+      delete process.env.TELEGRAM_BOT_TOKEN;
+
+      const view = await service.toView(stored as never);
+
+      expect(view.telegram).toEqual({
+        configured: true,
+        botUsername: 'apicore_test_bot',
+        linked: false,
+        firstName: null,
+        linkedAt: null,
+        enabled: false,
+      });
+      expect(JSON.stringify(view)).not.toMatch(/token/i);
+    });
+
+    it('is not configured without a bot username, even with a token', async () => {
+      process.env.TELEGRAM_BOT_USERNAME = '';
+      process.env.TELEGRAM_BOT_TOKEN =
+        '123456789:AAEhBOweik6ad9r_QXMENQjcrGbqCr4K-RM';
+
+      const view = await service.toView(stored as never);
+
+      expect(view.telegram.configured).toBe(false);
+      expect(view.telegram.botUsername).toBeNull();
+    });
+
+    it('shows the link without the chat id', async () => {
+      process.env.TELEGRAM_BOT_USERNAME = 'apicore_test_bot';
+      prisma.telegramLink.findUnique.mockResolvedValue({
+        userId: 'u1',
+        chatId: 4_711_000_001n,
+        telegramFirstName: 'Anna',
+        linkedAt: new Date('2026-10-14T08:00:00.000Z'),
+      });
+
+      const view = await service.toView({
+        ...stored,
+        telegramEnabled: true,
+      } as never);
+
+      expect(view.telegram).toMatchObject({
+        linked: true,
+        firstName: 'Anna',
+        linkedAt: '2026-10-14T08:00:00.000Z',
+        enabled: true,
+      });
+      expect(JSON.stringify(view)).not.toContain('4711000001');
+      expect(prisma.telegramLink.findUnique).toHaveBeenCalledWith({
+        where: { userId: 'u1' },
+      });
+    });
+  });
 });