feat(branding,auth): Update app description and improve authentication flow

- Update manifest.json and layout metadata with comprehensive Synapsis description emphasizing decentralized infrastructure and global signal layer concept
- Expand login page default node description to match updated branding messaging
- Replace Next.js router navigation with hard window.location.href redirect to ensure authentication cookies are properly picked up after login/import
- Remove unused router and ShieldAlert imports from login page
- Add accent color luminance detection to ToastContext for dynamic text color contrast
- Implement intelligent text color selection in success toasts based on accent color brightness to ensure readability
- These changes improve authentication reliability and ensure consistent branding messaging across the application

public/manifest.json

@@ -1,7 +1,7 @@
 {
     "name": "Synapsis",
     "short_name": "Synapsis",
-    "description": "Federated social network infrastructure",
+    "description": "Synapsis is designed to function like a global signal layer rather than a culture-bound platform. Anyone can run their own node and still participate in a shared, interconnected network.",
     "start_url": "/",
     "display": "standalone",
     "background_color": "#0a0a0a",

src/app/layout.tsx

@@ -15,7 +15,7 @@ const sairaCondensed = Saira_Condensed({
 
 export const metadata: Metadata = {
   title: "Synapsis",
-  description: "Federated social network infrastructure",
+  description: "Synapsis is designed to function like a global signal layer rather than a culture-bound platform. Anyone can run their own node and still participate in a shared, interconnected network, with global identity, clean terminology, and a modern interface that feels current rather than experimental.",
   manifest: "/manifest.json",
   icons: {
     icon: "/favicon.png",

src/app/login/page.tsx

@@ -2,12 +2,10 @@
 
 import { useState, useEffect } from 'react';
 import Link from 'next/link';
-import { useRouter } from 'next/navigation';
 import { SynapsisLogo } from '@/components/Icons';
-import { TriangleAlert, ShieldAlert } from 'lucide-react';
+import { TriangleAlert } from 'lucide-react';
 
 export default function LoginPage() {
-    const router = useRouter();
     const [mode, setMode] = useState<'login' | 'register' | 'import'>('login');
     const [email, setEmail] = useState('');
     const [password, setPassword] = useState('');
@@ -33,7 +31,7 @@ export default function LoginPage() {
             .then(data => {
                 setNodeInfo({
                     name: data.name || '',
-                    description: data.description || 'Federated social network infrastructure'
+                    description: data.description || 'Synapsis is designed to function like a global signal layer rather than a culture-bound platform. Anyone can run their own node and still participate in a shared, interconnected network, with global identity, clean terminology, and a modern interface that feels current rather than experimental. Synapsis aims to be neutral, resilient infrastructure for human and machine discourse, more like a protocol or nervous system than a social club.'
                 });
             })
             .catch(() => { });
@@ -98,11 +96,9 @@ export default function LoginPage() {
             }
 
             setImportSuccess(data.message);
-            // After successful import, the user is typically logged in (depends on API implementation)
-            // But let's redirect to login or home if the API returns success
+            // Hard redirect to ensure cookie is picked up
             setTimeout(() => {
-                router.push('/');
-                router.refresh();
+                window.location.href = '/';
             }, 2000);
 
         } catch (err) {
@@ -141,8 +137,8 @@ export default function LoginPage() {
                 throw new Error(data.error || 'Authentication failed');
             }
 
-            router.push('/');
-            router.refresh();
+            // Hard redirect to ensure cookie is picked up
+            window.location.href = '/';
         } catch (err) {
             setError(err instanceof Error ? err.message : 'An error occurred');
         } finally {

src/lib/contexts/ToastContext.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { createContext, useContext, useState, useCallback, ReactNode } from 'react';
+import { useAccentColor } from './AccentColorContext';
 
 type ToastType = 'success' | 'error' | 'info';
 
@@ -18,6 +19,16 @@ interface ToastContextType {
 
 const ToastContext = createContext<ToastContextType | null>(null);
 
+// Check if a color is light (needs dark text)
+function isLightColor(hex: string): boolean {
+    const color = hex.replace('#', '');
+    const r = parseInt(color.slice(0, 2), 16);
+    const g = parseInt(color.slice(2, 4), 16);
+    const b = parseInt(color.slice(4, 6), 16);
+    const luminance = (0.299 * r + 0.587 * g + 0.114 * b) / 255;
+    return luminance > 0.6;
+}
+
 export function ToastProvider({ children }: { children: ReactNode }) {
     const [toasts, setToasts] = useState<Toast[]>([]);
 
@@ -50,6 +61,9 @@ export function useToast() {
 }
 
 function ToastContainer({ toasts, removeToast }: { toasts: Toast[]; removeToast: (id: string) => void }) {
+    const { accentColor } = useAccentColor();
+    const needsDarkText = isLightColor(accentColor);
+    
     if (toasts.length === 0) return null;
 
     return (
@@ -77,9 +91,11 @@ function ToastContainer({ toasts, removeToast }: { toasts: Toast[]; removeToast:
                             : toast.type === 'success' 
                                 ? 'var(--accent)' 
                                 : 'var(--background-secondary)',
-                        color: toast.type === 'error' || toast.type === 'success' 
-                            ? '#fff' 
-                            : 'var(--foreground)',
+                        color: toast.type === 'error'
+                            ? '#fff'
+                            : toast.type === 'success' 
+                                ? (needsDarkText ? '#000' : '#fff')
+                                : 'var(--foreground)',
                         boxShadow: '0 4px 12px rgba(0, 0, 0, 0.3)',
                         fontSize: '14px',
                         fontWeight: 500,