Milestone 0/1: shell, calendar/psalter/hours scaffold, Prime

Client-side-first PWA (Vite/TS, no backend) per the approved plan: day-
navigable shell listing all 8 hours, Prime fully resolves via the
calendar -> psalter -> ordo pipeline, the other 7 hours are registered
but flagged not-implemented. Sanctoral/temporal calendar data uses a
day -> id indirection layer (saints, easter-offsets, fixed-date-calendar)
so reassigning a feast to a different day is a data edit, not a code
change. Docker (Caddy-serving-static) + Gitea CI workflow scaffolded to
match the eec/drip/bookshop operational pattern.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/ui/shell.test.ts

@@ -0,0 +1,74 @@
+import { beforeEach, describe, expect, it } from 'vitest';
+import { mountShell } from '../../src/ui/shell';
+import { setDate, setSelectedHour, setLanguages } from '../../src/app-state';
+
+describe('shell', () => {
+  // app-state is a module-level singleton, so each test must reset every
+  // field it might have mutated — not just the one it cares about — or
+  // state leaks across tests in this file.
+  beforeEach(() => {
+    document.body.innerHTML = '<div id="app"></div>';
+    setDate('2026-08-09');
+    setSelectedHour('prime');
+    setLanguages(['en']);
+    window.history.replaceState(null, '', '/vu/2026-08-09/prime');
+  });
+
+  it('renders the day nav, all 8 hours, and Prime content by default', () => {
+    const root = document.getElementById('app')!;
+    mountShell(root);
+
+    expect(root.querySelector('.day-nav-date')?.textContent).toContain('August 9, 2026');
+
+    const hourNames = Array.from(root.querySelectorAll('.hour-name')).map((el) => el.textContent);
+    expect(hourNames).toEqual([
+      'Prime',
+      'Compline',
+      'Terce',
+      'Sext',
+      'None',
+      'Lauds',
+      'Vespers',
+      'Matins',
+    ]);
+
+    expect(root.querySelector('.hour-item.is-selected .hour-name')?.textContent).toBe('Prime');
+    expect(root.querySelector('.hour-view h2')?.textContent).toBe('Prime');
+    expect(root.querySelectorAll('.ordo-part-psalm').length).toBeGreaterThan(0);
+  });
+
+  it('switches to a not-yet-built hour and shows the pending message', () => {
+    const root = document.getElementById('app')!;
+    mountShell(root);
+
+    const complineBtn = Array.from(root.querySelectorAll<HTMLButtonElement>('[data-hour]')).find(
+      (btn) => btn.dataset.hour === 'compline',
+    );
+    complineBtn?.click();
+
+    expect(root.querySelector('.hour-view h2')?.textContent).toBe('Compline');
+    expect(root.querySelector('.hour-view-pending')).not.toBeNull();
+  });
+
+  it('moving to the next day updates the displayed date', () => {
+    const root = document.getElementById('app')!;
+    mountShell(root);
+
+    root.querySelector<HTMLButtonElement>('[data-action="next"]')?.click();
+    expect(root.querySelector('.day-nav-date')?.textContent).toContain('August 10, 2026');
+  });
+
+  it('switching to two-language mode renders two columns per verse', () => {
+    const root = document.getElementById('app')!;
+    mountShell(root);
+
+    const bilingualBtn = Array.from(root.querySelectorAll<HTMLButtonElement>('[data-langs]')).find(
+      (btn) => btn.dataset.langs === 'en,la',
+    );
+    bilingualBtn?.click();
+
+    const firstVerseColumns = root.querySelector('.psalm-verse .lang-columns');
+    expect(firstVerseColumns?.classList.contains('lang-columns-2')).toBe(true);
+    expect(firstVerseColumns?.querySelectorAll('.lang-column').length).toBe(2);
+  });
+});