Logged-out home stays the product page (#120)

## Summary
- Closes #118 and #119.
- Logged-out `/` is the product page. Sign In is a link. After sign-in, `/` is still the chat dashboard.
- A 401 from a public API call (for example a stale token on `/public/usage/`) no longer sends visitors from `/` to Sign In. Protected routes such as `/account/` still redirect.
- Product, pricing, changelog, and privacy use the same floating-dot background as Sign In and the dashboard. Text follows the light and dark theme so it stays readable.

## Test plan
- [x] `authRedirect` tests: public API calls and public paths do not redirect; `/account/` and `/document_storage` still do.
- [x] Landing, pricing, privacy, changelog, HomeRoute, and Sign In tests pass.
- [ ] Logged out, open `/` and confirm the product page, then Sign In, then `/` is the dashboard.
- [ ] With an expired access token still in storage, open `/` and confirm you stay on the product page.
- [ ] Check product, pricing, changelog, and privacy in light and dark mode. Dots visible, text readable.

Reviewed-on: #120

llm-fe/src/axiosApi.js

@@ -11,6 +11,7 @@ import {
   isTokenNotValidError,
 } from "./llm-fe/auth/jwtHelpers";
 import { redirectToAppPath } from "./llm-fe/platform/nativePlatform";
+import { shouldRedirectToSignIn } from "./llm-fe/auth/authRedirect";
 
 const baseURL = process.env.REACT_APP_BACKEND_REST_API_BASE_URL;
 
@@ -97,8 +98,10 @@ axiosInstance.interceptors.response.use(
     if (error.response.status === 401 && isRefreshCall) {
       await clearTokens();
       applyAccessToken(null);
-      // Hash-safe on Capacitor (#24); plain path on web BrowserRouter.
+      // Stay on the product page. Only bounce protected app routes.
-      redirectToAppPath("/signin/");
+      if (shouldRedirectToSignIn(requestUrl, window.location.pathname)) {
+        redirectToAppPath("/signin/");
+      }
       return Promise.reject(error);
     }
 
@@ -109,7 +112,9 @@ axiosInstance.interceptors.response.use(
       if (!refresh_token) {
         await clearTokens();
         applyAccessToken(null);
-        redirectToAppPath("/signin/");
+        if (shouldRedirectToSignIn(requestUrl, window.location.pathname)) {
+          redirectToAppPath("/signin/");
+        }
         return Promise.reject(error);
       }
 
@@ -127,14 +132,18 @@ axiosInstance.interceptors.response.use(
         } catch (err) {
           await clearTokens();
           applyAccessToken(null);
-          redirectToAppPath("/signin/");
+          if (shouldRedirectToSignIn(requestUrl, window.location.pathname)) {
+            redirectToAppPath("/signin/");
+          }
           return Promise.reject(err);
         }
       }
 
       await clearTokens();
       applyAccessToken(null);
-      redirectToAppPath("/signin/");
+      if (shouldRedirectToSignIn(requestUrl, window.location.pathname)) {
+        redirectToAppPath("/signin/");
+      }
     }
 
     return Promise.reject(error);

llm-fe/src/llm-fe/auth/authRedirect.test.ts

@@ -0,0 +1,15 @@
+import { shouldRedirectToSignIn } from './authRedirect';
+
+describe('shouldRedirectToSignIn', () => {
+  it('keeps a logged-out visitor on the product page', () => {
+    expect(shouldRedirectToSignIn('/public/usage/', '/')).toBe(false);
+    expect(shouldRedirectToSignIn('/public/settings/', '/pricing/')).toBe(false);
+    expect(shouldRedirectToSignIn('/user/get/', '/')).toBe(false);
+    expect(shouldRedirectToSignIn('/user/get/', '/changelog/')).toBe(false);
+  });
+
+  it('still sends an expired session on the app to sign in', () => {
+    expect(shouldRedirectToSignIn('/user/get/', '/account/')).toBe(true);
+    expect(shouldRedirectToSignIn('/token/refresh/', '/document_storage')).toBe(true);
+  });
+});

llm-fe/src/llm-fe/auth/authRedirect.ts

@@ -0,0 +1,38 @@
+/** Public marketing routes. An auth failure here must not replace the page with Sign In. */
+
+const PUBLIC_PATHS = new Set([
+  "/",
+  "/pricing",
+  "/privacy",
+  "/changelog",
+  "/terms_of_service",
+  "/legal/terms-of-service",
+  "/account-deletion",
+  "/signin",
+  "/signup",
+  "/password_reset",
+  "/password_reset_confirmation",
+  "/set_password",
+]);
+
+export function normalizeAppPath(pathname: string | null | undefined): string {
+  if (!pathname || pathname === "/") return "/";
+  return pathname.endsWith("/") ? pathname.slice(0, -1) : pathname;
+}
+
+export function isPublicApiRequest(requestUrl: string | null | undefined): boolean {
+  return String(requestUrl || "").includes("/public/");
+}
+
+export function isPublicAppPath(pathname: string | null | undefined): boolean {
+  return PUBLIC_PATHS.has(normalizeAppPath(pathname));
+}
+
+export function shouldRedirectToSignIn(
+  requestUrl: string | null | undefined,
+  pathname: string | null | undefined,
+): boolean {
+  if (isPublicApiRequest(requestUrl)) return false;
+  if (isPublicAppPath(pathname)) return false;
+  return true;
+}

llm-fe/src/llm-fe/components/PublicSite/GetStarted.tsx

@@ -3,6 +3,7 @@ import { Link } from 'react-router-dom';
 import styled from 'styled-components';
 import { axiosInstance } from '../../../axiosApi';
 import { AnalyticsEvents, trackEvent } from '../../utils/analytics';
+import { publicAccent, publicCard, publicLine, publicText } from './publicColors';
 
 const Stack = styled.div`
   display: flex;
@@ -34,12 +35,13 @@ const Primary = styled(Link)`
 `;
 
 const Secondary = styled(Link)`
-  color: #d6dcff;
+  color: ${publicAccent};
   font-weight: 600;
 `;
 
 const Quiet = styled(Link)`
-  color: rgba(255, 255, 255, 0.72);
+  color: ${publicText};
+  opacity: 0.75;
   font-size: 0.95rem;
 `;
 
@@ -63,11 +65,11 @@ const Label = styled.label`
 
 const Input = styled.input`
   flex: 1 1 14rem;
-  background: rgba(255, 255, 255, 0.06);
+  background: ${publicCard};
-  border: 1px solid rgba(255, 255, 255, 0.16);
+  border: 1px solid ${publicLine};
   border-radius: 0.5rem;
   padding: 0.9rem 1rem;
-  color: #fff;
+  color: ${publicText};
   font-size: 1rem;
 `;
 
@@ -89,7 +91,7 @@ const Submit = styled.button`
 
 const Note = styled.p`
   margin: 0;
-  color: rgba(255, 255, 255, 0.8);
+  color: ${publicText};
   font-size: 0.95rem;
 `;
 

llm-fe/src/llm-fe/components/PublicSite/PublicSiteLayout.tsx

@@ -1,12 +1,21 @@
 import React from 'react';
 import { Link } from 'react-router-dom';
 import styled from 'styled-components';
+import ParticleBackground from '../ParticleBackground/ParticleBackground';
 import { PUBLIC_FOOTER_LINKS, PUBLIC_HEADER_LINKS } from './publicNav';
 
+const text = ({ theme }: { theme?: { colors?: { text?: string } } }) =>
+  theme?.colors?.text ?? '#344767';
+
+const line = ({ theme }: { theme?: { colors?: { cardBorder?: string } } }) =>
+  theme?.colors?.cardBorder ?? 'rgba(0, 0, 0, 0.08)';
+
 const Page = styled.div`
+  position: relative;
+  z-index: 1;
   min-height: 100vh;
-  background: #07080d;
+  background: transparent;
-  color: #fff;
+  color: ${text};
   font-family: Inter, sans-serif;
   display: flex;
   flex-direction: column;
@@ -19,11 +28,11 @@ const Header = styled.header`
   justify-content: space-between;
   gap: 1rem;
   padding: 1.25rem 1.5rem;
-  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
+  border-bottom: 1px solid ${line};
 `;
 
 const Brand = styled(Link)`
-  color: #fff;
+  color: ${text};
   font-weight: 700;
   font-size: 1.15rem;
   text-decoration: none;
@@ -38,19 +47,20 @@ const Nav = styled.nav`
 `;
 
 const NavLink = styled(Link)`
-  color: rgba(255, 255, 255, 0.82);
+  color: ${text};
   text-decoration: none;
   font-size: 0.95rem;
+  opacity: 0.85;
 
   &:hover {
-    color: #fff;
+    opacity: 1;
   }
 `;
 
 const SignInLink = styled(Link)`
-  color: #fff;
+  color: ${text};
   text-decoration: none;
-  border: 1px solid rgba(255, 255, 255, 0.28);
+  border: 1px solid ${line};
   border-radius: 0.5rem;
   padding: 0.45rem 0.8rem;
   font-size: 0.95rem;
@@ -64,10 +74,11 @@ const Main = styled.main`
 `;
 
 const FooterBar = styled.footer`
-  border-top: 1px solid rgba(255, 255, 255, 0.08);
+  border-top: 1px solid ${line};
   padding: 1.5rem;
-  color: rgba(255, 255, 255, 0.7);
+  color: ${text};
   font-size: 0.9rem;
+  opacity: 0.85;
 `;
 
 const FooterNav = styled.nav`
@@ -78,7 +89,7 @@ const FooterNav = styled.nav`
 `;
 
 const FooterLink = styled(Link)`
-  color: rgba(255, 255, 255, 0.82);
+  color: ${text};
 `;
 
 type PublicSiteLayoutProps = {
@@ -88,6 +99,7 @@ type PublicSiteLayoutProps = {
 const PublicSiteLayout = ({ children }: PublicSiteLayoutProps): JSX.Element => {
   return (
     <Page>
+      <ParticleBackground />
       <Header>
         <Brand to="/">Hesychia</Brand>
         <Nav aria-label="Primary">

llm-fe/src/llm-fe/components/PublicSite/UsageCounts.tsx

@@ -1,10 +1,11 @@
 import React, { useEffect, useState } from 'react';
 import styled from 'styled-components';
 import { axiosInstance } from '../../../axiosApi';
+import { publicText } from './publicColors';
 
 const Section = styled.section`
   margin-top: 1.5rem;
-  color: rgba(255, 255, 255, 0.86);
+  color: ${publicText};
   font-size: 0.95rem;
 `;
 
@@ -15,7 +16,8 @@ const Figures = styled.p`
 
 const AsOf = styled.p`
   margin: 0;
-  color: rgba(255, 255, 255, 0.62);
+  color: ${publicText};
+  opacity: 0.7;
 `;
 
 type PublicUsage = {

llm-fe/src/llm-fe/components/PublicSite/publicColors.ts

@@ -0,0 +1,17 @@
+type PublicTheme = {
+  colors?: {
+    text?: string;
+    cardBackground?: string;
+    cardBorder?: string;
+  };
+};
+
+export const publicText = ({ theme }: { theme?: PublicTheme }) => theme?.colors?.text ?? '#344767';
+
+export const publicCard = ({ theme }: { theme?: PublicTheme }) =>
+  theme?.colors?.cardBackground ?? 'rgba(255, 255, 255, 0.72)';
+
+export const publicLine = ({ theme }: { theme?: PublicTheme }) =>
+  theme?.colors?.cardBorder ?? 'rgba(0, 0, 0, 0.08)';
+
+export const publicAccent = '#667eea';

llm-fe/src/llm-fe/pages/Changelog/ChangelogPage.test.tsx

@@ -4,6 +4,8 @@ import { MemoryRouter } from 'react-router-dom';
 import ChangelogPage from './ChangelogPage';
 import { CHANGELOG_ENTRIES } from './changelogEntries';
 
+jest.mock('../../components/ParticleBackground/ParticleBackground', () => () => null);
+
 describe('ChangelogPage', () => {
   it('lists dated shipped notes and no founder', () => {
     render(

llm-fe/src/llm-fe/pages/Changelog/ChangelogPage.tsx

@@ -2,6 +2,7 @@ import React from 'react';
 import styled from 'styled-components';
 import PublicSiteLayout from '../../components/PublicSite/PublicSiteLayout';
 import { CHANGELOG_ENTRIES } from './changelogEntries';
+import { publicLine, publicText } from '../../components/PublicSite/publicColors';
 
 const Title = styled.h1`
   font-size: clamp(2rem, 4vw, 2.75rem);
@@ -17,13 +18,14 @@ const List = styled.ol`
 `;
 
 const Item = styled.li`
-  border-top: 1px solid rgba(255, 255, 255, 0.1);
+  border-top: 1px solid ${publicLine};
   padding-top: 1rem;
 `;
 
 const When = styled.time`
   display: block;
-  color: rgba(255, 255, 255, 0.6);
+  color: ${publicText};
+  opacity: 0.65;
   font-size: 0.9rem;
   margin-bottom: 0.35rem;
 `;
@@ -35,7 +37,7 @@ const Heading = styled.h2`
 
 const Note = styled.p`
   margin: 0;
-  color: rgba(255, 255, 255, 0.82);
+  color: ${publicText};
   line-height: 1.5;
   max-width: 40rem;
 `;

llm-fe/src/llm-fe/pages/Landing/LandingPage.test.tsx

@@ -4,6 +4,8 @@ import userEvent from '@testing-library/user-event';
 import { MemoryRouter } from 'react-router-dom';
 import LandingPage from './LandingPage';
 
+jest.mock('../../components/ParticleBackground/ParticleBackground', () => () => null);
+
 const mockGet = jest.fn();
 const mockPost = jest.fn();
 

llm-fe/src/llm-fe/pages/Landing/LandingPage.tsx

@@ -5,6 +5,7 @@ import hesychiaMark from '../../assets/brand/hesychia-mark.png';
 import GetStarted from '../../components/PublicSite/GetStarted';
 import PublicSiteLayout from '../../components/PublicSite/PublicSiteLayout';
 import UsageCounts from '../../components/PublicSite/UsageCounts';
+import { publicAccent, publicCard, publicLine, publicText } from '../../components/PublicSite/publicColors';
 
 const Hero = styled.header`
   max-width: 40rem;
@@ -27,14 +28,15 @@ const Lede = styled.p`
   font-size: 1.25rem;
   line-height: 1.45;
   margin: 0 0 0.75rem;
-  color: rgba(255, 255, 255, 0.92);
+  color: ${publicText};
 `;
 
 const Memory = styled.p`
   font-size: 1.05rem;
   line-height: 1.5;
   margin: 0 0 1.5rem;
-  color: rgba(255, 255, 255, 0.82);
+  color: ${publicText};
+  opacity: 0.85;
 `;
 
 const Privacy = styled.section`
@@ -45,12 +47,13 @@ const Privacy = styled.section`
 const PrivacyList = styled.ul`
   margin: 0.5rem 0 0.75rem;
   padding-left: 1.2rem;
-  color: rgba(255, 255, 255, 0.82);
+  color: ${publicText};
+  opacity: 0.85;
   line-height: 1.5;
 `;
 
 const TextLink = styled(Link)`
-  color: #c9d4ff;
+  color: ${publicAccent};
 `;
 
 const Features = styled.section`
@@ -60,10 +63,10 @@ const Features = styled.section`
 `;
 
 const Feature = styled.article`
-  border: 1px solid rgba(255, 255, 255, 0.1);
+  border: 1px solid ${publicLine};
   border-radius: 0.75rem;
   padding: 1.25rem 1.35rem;
-  background: rgba(255, 255, 255, 0.03);
+  background: ${publicCard};
 `;
 
 const FeatureTitle = styled.h2`
@@ -73,7 +76,8 @@ const FeatureTitle = styled.h2`
 
 const FeatureBody = styled.p`
   margin: 0;
-  color: rgba(255, 255, 255, 0.8);
+  color: ${publicText};
+  opacity: 0.85;
   line-height: 1.5;
 `;
 

llm-fe/src/llm-fe/pages/Pricing/PricingPage.test.tsx

@@ -3,6 +3,8 @@ import { render, screen } from '@testing-library/react';
 import { MemoryRouter } from 'react-router-dom';
 import PricingPage from './PricingPage';
 
+jest.mock('../../components/ParticleBackground/ParticleBackground', () => () => null);
+
 jest.mock('../../../axiosApi', () => ({
   axiosInstance: {
     get: () => Promise.resolve({ data: { enable_account_registration: false } }),

llm-fe/src/llm-fe/pages/Pricing/PricingPage.tsx

@@ -3,6 +3,7 @@ import { Link } from 'react-router-dom';
 import styled from 'styled-components';
 import GetStarted from '../../components/PublicSite/GetStarted';
 import PublicSiteLayout from '../../components/PublicSite/PublicSiteLayout';
+import { publicAccent, publicText } from '../../components/PublicSite/publicColors';
 
 const Title = styled.h1`
   font-size: clamp(2rem, 4vw, 2.75rem);
@@ -15,13 +16,13 @@ const Price = styled.p`
 `;
 
 const Body = styled.p`
-  color: rgba(255, 255, 255, 0.82);
+  color: ${publicText};
   line-height: 1.5;
   max-width: 36rem;
 `;
 
 const Back = styled(Link)`
-  color: #c9d4ff;
+  color: ${publicAccent};
 `;
 
 const PricingPage = (): JSX.Element => {

llm-fe/src/llm-fe/pages/Privacy/PrivacyPage.test.tsx

@@ -3,6 +3,8 @@ import { render, screen } from '@testing-library/react';
 import { MemoryRouter } from 'react-router-dom';
 import PrivacyPage from './PrivacyPage';
 
+jest.mock('../../components/ParticleBackground/ParticleBackground', () => () => null);
+
 describe('PrivacyPage', () => {
   it('states storage, no ads, and that cancel does not delete documents', () => {
     render(

llm-fe/src/llm-fe/pages/Privacy/PrivacyPage.tsx

@@ -2,6 +2,7 @@ import React from 'react';
 import { Link } from 'react-router-dom';
 import styled from 'styled-components';
 import PublicSiteLayout from '../../components/PublicSite/PublicSiteLayout';
+import { publicAccent, publicText } from '../../components/PublicSite/publicColors';
 
 const Title = styled.h1`
   font-size: clamp(2rem, 4vw, 2.75rem);
@@ -20,12 +21,12 @@ const Heading = styled.h2`
 
 const Body = styled.p`
   margin: 0;
-  color: rgba(255, 255, 255, 0.82);
+  color: ${publicText};
   line-height: 1.55;
 `;
 
 const TextLink = styled(Link)`
-  color: #c9d4ff;
+  color: ${publicAccent};
 `;
 
 const PrivacyPage = (): JSX.Element => {