feat(web/m7-363): branding helper + window.__MINSTREL__ consumer

web/src/lib/branding.test.ts

@@ -0,0 +1,53 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { appName, description, pageTitle } from './branding';
+
+const setGlobal = (g: { appName: string; description: string } | undefined) => {
+  if (g === undefined) {
+    delete (window as { __MINSTREL__?: unknown }).__MINSTREL__;
+  } else {
+    (window as { __MINSTREL__?: typeof g }).__MINSTREL__ = g;
+  }
+};
+
+describe('branding helpers', () => {
+  beforeEach(() => setGlobal(undefined));
+  afterEach(() => setGlobal(undefined));
+
+  it('appName returns the global value when set', () => {
+    setGlobal({ appName: 'Family Jukebox', description: 'home' });
+    expect(appName()).toBe('Family Jukebox');
+  });
+
+  it('appName falls back to "Minstrel" when global is undefined', () => {
+    expect(appName()).toBe('Minstrel');
+  });
+
+  it('appName falls back to "Minstrel" when value contains an unrendered Go token', () => {
+    setGlobal({ appName: '{{ .AppName }}', description: 'x' });
+    expect(appName()).toBe('Minstrel');
+  });
+
+  it('description returns the global value when set', () => {
+    setGlobal({ appName: 'Minstrel', description: 'Our home library.' });
+    expect(description()).toBe('Our home library.');
+  });
+
+  it('description falls back to a default tagline when unset', () => {
+    expect(description()).toContain('Self-hosted music server');
+  });
+
+  it('pageTitle with section returns "{appName} · {section}"', () => {
+    setGlobal({ appName: 'Minstrel', description: 'x' });
+    expect(pageTitle('Search')).toBe('Minstrel · Search');
+  });
+
+  it('pageTitle without section returns just the appName', () => {
+    setGlobal({ appName: 'Minstrel', description: 'x' });
+    expect(pageTitle()).toBe('Minstrel');
+  });
+
+  it('pageTitle composes nested sections via the · separator', () => {
+    setGlobal({ appName: 'Minstrel', description: 'x' });
+    expect(pageTitle('Library · Artists')).toBe('Minstrel · Library · Artists');
+  });
+});