Close DV-01–04,07,09,13,14: unify operator-deck UX in server/web.

Standardize neon cyan on #00e8f5, wire SacredPageHeader across Builds/Path Tracer/LOTL, dedupe Pages.css, align Path Tracer chrome, drop dead wealth-deck CSS, add prefers-color-scheme shell + HelpTip, sidebar version from package.json build inject, and Vitest CSS regression guards.

server/web/src/api/auth.test.ts

@@ -77,4 +77,14 @@ describe('auth session helpers', () => {
     expect(consumeAuthExpiredFlag()).toBe(true);
     expect(consumeAuthExpiredFlag()).toBe(false);
   });
+
+  it('dispatches aetherforge-auth on login and logout', () => {
+    const handler = vi.fn();
+    window.addEventListener('aetherforge-auth', handler);
+    setStoredAuth('user', 'pass');
+    expect(handler).toHaveBeenCalledTimes(1);
+    clearStoredAuth();
+    expect(handler).toHaveBeenCalledTimes(2);
+    window.removeEventListener('aetherforge-auth', handler);
+  });
 });