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+# Critical Issue: Infinite Token Refresh Loop
+
+## Problem Analysis
+
+### What's Happening
+
+1. **Initial Load**: App starts successfully, user authenticated
+2. **Session Invalidation**: Keycloak session becomes invalid (user logged out elsewhere, session expired, etc.)
+3. **Refresh Storm**: Every API request triggers:
+   - JWT callback execution
+   - Token refresh attempt
+   - Refresh failure (session invalid)
+   - Token cleared, but error state persists
+   - **Next request repeats the cycle**
+
+### Root Cause
+
+The JWT callback in `app/api/auth/options.ts` has no circuit breaker:
+
+```typescript
+// Current problematic flow:
+if (expiresAt && Date.now() < expiresAt) {
+  return token; // Token valid
+}
+
+// Token expired - ALWAYS tries to refresh
+const refreshedToken = await refreshAccessToken(token);
+
+// If refresh fails, clears tokens but...
+// Next request will see expired token and try again!
+```
+
+**The Problem:**
+- No cooldown period after failed refresh
+- No "session invalid" cache/flag
+- Every request triggers refresh attempt
+- Multiple widgets = multiple parallel requests = refresh storm
+
+### Impact
+
+- **Performance**: Excessive Keycloak API calls
+- **Server Load**: CPU/memory spike from refresh attempts
+- **User Experience**: App appears broken, constant loading
+- **Logs**: Spam with "Keycloak session invalidated" messages
+- **Security**: Potential DoS on Keycloak server
+
+---
+
+## Solution: Circuit Breaker Pattern
+
+### Implementation Strategy
+
+1. **Add Refresh Cooldown**: Don't retry refresh for X seconds after failure
+2. **Session Invalid Flag**: Cache the "session invalid" state
+3. **Early Return**: If session known to be invalid, skip refresh attempt
+4. **Client-Side Detection**: Stop making requests when session invalid
+
+### Code Changes Needed
+
+#### 1. Add Circuit Breaker to JWT Callback
+
+```typescript
+// Add to app/api/auth/options.ts
+
+// Track last failed refresh attempt
+const lastFailedRefresh = new Map<string, number>();
+const REFRESH_COOLDOWN = 5000; // 5 seconds
+
+async jwt({ token, account, profile }) {
+  // ... existing initial sign-in logic ...
+  
+  // Check if token is expired
+  const expiresAt = token.accessTokenExpires as number;
+  if (expiresAt && Date.now() < expiresAt) {
+    return token; // Token still valid
+  }
+
+  // CIRCUIT BREAKER: Check if we recently failed to refresh
+  const userId = token.sub || 'unknown';
+  const lastFailure = lastFailedRefresh.get(userId) || 0;
+  const timeSinceFailure = Date.now() - lastFailure;
+  
+  if (timeSinceFailure < REFRESH_COOLDOWN) {
+    // Too soon after failure, return error token immediately
+    logger.debug('Refresh cooldown active, skipping refresh attempt', {
+      userId,
+      timeSinceFailure,
+    });
+    return {
+      ...token,
+      error: "SessionNotActive",
+      accessToken: undefined,
+      refreshToken: undefined,
+      idToken: undefined,
+    };
+  }
+
+  // Try to refresh
+  if (!token.refreshToken) {
+    return {
+      ...token,
+      error: "NoRefreshToken",
+      accessToken: undefined,
+      refreshToken: undefined,
+      idToken: undefined,
+    };
+  }
+
+  const refreshedToken = await refreshAccessToken(token);
+  
+  // If refresh failed, record the failure time
+  if (refreshedToken.error === "SessionNotActive") {
+    lastFailedRefresh.set(userId, Date.now());
+    logger.info("Keycloak session invalidated, setting cooldown", { userId });
+    
+    // Clean up old entries (prevent memory leak)
+    if (lastFailedRefresh.size > 1000) {
+      const now = Date.now();
+      for (const [key, value] of lastFailedRefresh.entries()) {
+        if (now - value > REFRESH_COOLDOWN * 10) {
+          lastFailedRefresh.delete(key);
+        }
+      }
+    }
+    
+    return {
+      ...refreshedToken,
+      accessToken: undefined,
+      refreshToken: undefined,
+      idToken: undefined,
+    };
+  }
+  
+  // Success - clear any previous failure record
+  lastFailedRefresh.delete(userId);
+  
+  return refreshedToken;
+}
+```
+
+#### 2. Use Redis for Distributed Circuit Breaker
+
+For multi-instance deployments, use Redis:
+
+```typescript
+// lib/services/auth-circuit-breaker.ts
+import { getRedisClient } from '@/lib/redis';
+
+const REFRESH_COOLDOWN = 5000; // 5 seconds
+const CIRCUIT_BREAKER_KEY = (userId: string) => `auth:refresh:cooldown:${userId}`;
+
+export async function isRefreshInCooldown(userId: string): Promise<boolean> {
+  const redis = getRedisClient();
+  const key = CIRCUIT_BREAKER_KEY(userId);
+  const lastFailure = await redis.get(key);
+  
+  if (!lastFailure) {
+    return false;
+  }
+  
+  const timeSinceFailure = Date.now() - parseInt(lastFailure, 10);
+  return timeSinceFailure < REFRESH_COOLDOWN;
+}
+
+export async function recordRefreshFailure(userId: string): Promise<void> {
+  const redis = getRedisClient();
+  const key = CIRCUIT_BREAKER_KEY(userId);
+  await redis.set(key, Date.now().toString(), 'EX', Math.ceil(REFRESH_COOLDOWN / 1000));
+}
+
+export async function clearRefreshCooldown(userId: string): Promise<void> {
+  const redis = getRedisClient();
+  const key = CIRCUIT_BREAKER_KEY(userId);
+  await redis.del(key);
+}
+```
+
+#### 3. Client-Side Request Stopping
+
+Add to components to stop making requests when session invalid:
+
+```typescript
+// hooks/use-session-guard.ts
+import { useSession } from 'next-auth/react';
+import { useEffect, useRef } from 'react';
+
+export function useSessionGuard() {
+  const { status, data: session } = useSession();
+  const hasInvalidSession = useRef(false);
+  
+  useEffect(() => {
+    if (status === 'unauthenticated' && !hasInvalidSession.current) {
+      hasInvalidSession.current = true;
+      // Stop all refresh intervals
+      // Clear any pending requests
+    }
+  }, [status]);
+  
+  return {
+    shouldMakeRequests: status === 'authenticated' && !hasInvalidSession.current,
+    isInvalid: hasInvalidSession.current,
+  };
+}
+```
+
+---
+
+## Immediate Fix (Quick)
+
+### Option 1: Add Simple Cooldown (In-Memory)
+
+Add this to `app/api/auth/options.ts`:
+
+```typescript
+// At top of file
+const refreshCooldown = new Map<string, number>();
+const COOLDOWN_MS = 5000; // 5 seconds
+
+// In jwt callback, before refresh attempt:
+const userId = token.sub || 'unknown';
+const lastFailure = refreshCooldown.get(userId) || 0;
+
+if (Date.now() - lastFailure < COOLDOWN_MS) {
+  // Skip refresh, return error immediately
+  return {
+    ...token,
+    error: "SessionNotActive",
+    accessToken: undefined,
+    refreshToken: undefined,
+    idToken: undefined,
+  };
+}
+
+// After failed refresh:
+if (refreshedToken.error === "SessionNotActive") {
+  refreshCooldown.set(userId, Date.now());
+  // ... rest of error handling
+}
+```
+
+### Option 2: Early Return on Known Invalid Session
+
+```typescript
+// In jwt callback, check token error first:
+if (token.error === "SessionNotActive") {
+  // Already know session is invalid, don't try again
+  return {
+    ...token,
+    accessToken: undefined,
+    refreshToken: undefined,
+    idToken: undefined,
+    error: "SessionNotActive",
+  };
+}
+```
+
+---
+
+## Recommended Implementation
+
+1. **Immediate**: Add simple in-memory cooldown (Option 1)
+2. **Short-term**: Migrate to Redis-based circuit breaker
+3. **Long-term**: Add client-side session guard to stop requests
+
+---
+
+## Testing
+
+After implementing:
+
+1. **Test Scenario 1**: Logout from Keycloak admin console
+   - Should see: 1-2 refresh attempts, then cooldown
+   - Should NOT see: Infinite loop
+
+2. **Test Scenario 2**: Expire session manually
+   - Should see: Cooldown prevents refresh storm
+   - Should see: User redirected to sign-in
+
+3. **Test Scenario 3**: Multiple widgets loading
+   - Should see: All widgets respect cooldown
+   - Should see: No refresh storm
+
+---
+
+## Monitoring
+
+Add metrics:
+- Refresh attempt count
+- Refresh failure count
+- Cooldown activations
+- Session invalidations per user
+
diff --git a/LOG_ANALYSIS_SUMMARY.md b/LOG_ANALYSIS_SUMMARY.md
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+# Log Analysis Summary - Infinite Refresh Loop Fix
+
+## Problem Identified
+
+Your logs showed a **critical infinite refresh loop**:
+
+```
+Keycloak session invalidated, clearing token to force re-authentication
+Keycloak session invalidated, clearing token to force re-authentication
+Keycloak session invalidated, clearing token to force re-authentication
+... (repeating infinitely)
+```
+
+### Root Cause
+
+1. **Session Invalidated**: User's Keycloak session became invalid (logged out elsewhere, expired, etc.)
+2. **Multiple Widgets**: All widgets/components making parallel API requests
+3. **JWT Callback Triggered**: Each request triggers NextAuth JWT callback
+4. **Refresh Attempt**: Each callback tries to refresh the expired token
+5. **Refresh Fails**: Refresh fails because session is invalid
+6. **No Circuit Breaker**: Next request sees expired token → tries refresh again → **infinite loop**
+
+### Impact
+
+- **Performance**: Hundreds of refresh attempts per second
+- **Server Load**: CPU/memory spike
+- **Keycloak Load**: Potential DoS on Keycloak server
+- **User Experience**: App appears broken
+- **Logs**: Spam with error messages
+
+---
+
+## Solution Implemented
+
+### Circuit Breaker Pattern
+
+Added a **5-second cooldown** after failed refresh attempts:
+
+1. **Track Failures**: Record timestamp when refresh fails
+2. **Cooldown Period**: Don't retry refresh for 5 seconds after failure
+3. **Early Return**: If in cooldown, return error immediately (no API call)
+4. **Memory Management**: Cleanup old entries to prevent memory leaks
+
+### Code Changes
+
+**File**: `app/api/auth/options.ts`
+
+**Added:**
+- `refreshCooldown` Map to track last failure per user
+- `REFRESH_COOLDOWN_MS = 5000` (5 seconds)
+- `cleanupRefreshCooldown()` function to prevent memory leaks
+- Cooldown check before refresh attempt
+- Failure recording after failed refresh
+
+**How It Works:**
+
+```typescript
+// Before refresh attempt:
+if (timeSinceFailure < REFRESH_COOLDOWN_MS) {
+  // Skip refresh, return error immediately
+  return errorToken;
+}
+
+// After failed refresh:
+if (refreshedToken.error === "SessionNotActive") {
+  refreshCooldown.set(userId, Date.now()); // Record failure
+  return errorToken;
+}
+```
+
+---
+
+## Expected Behavior After Fix
+
+### Before Fix
+```
+Request 1 → Refresh attempt → Fail → Clear tokens
+Request 2 → Refresh attempt → Fail → Clear tokens
+Request 3 → Refresh attempt → Fail → Clear tokens
+... (infinite loop)
+```
+
+### After Fix
+```
+Request 1 → Refresh attempt → Fail → Record failure → Clear tokens
+Request 2 → Check cooldown → Skip refresh → Return error immediately
+Request 3 → Check cooldown → Skip refresh → Return error immediately
+... (cooldown prevents refresh attempts)
+After 5s → Next request can try refresh again (if session restored)
+```
+
+### What You'll See in Logs
+
+**Good Signs:**
+- ✅ "Refresh cooldown active, skipping refresh attempt" (instead of infinite failures)
+- ✅ Only 1-2 refresh attempts per user when session invalidates
+- ✅ User redirected to sign-in page
+- ✅ No refresh storm
+
+**Bad Signs (if still happening):**
+- ❌ Still seeing infinite "Keycloak session invalidated" messages
+- ❌ Multiple refresh attempts within 5 seconds
+- ❌ Cooldown not working
+
+---
+
+## Testing the Fix
+
+### Test Scenario 1: Session Invalidation
+1. Log in to the app
+2. Logout from Keycloak admin console (or expire session)
+3. **Expected**: 
+   - 1-2 refresh attempts
+   - Then cooldown messages
+   - User redirected to sign-in
+   - **NOT** infinite loop
+
+### Test Scenario 2: Multiple Widgets
+1. Open app with all widgets loading
+2. Invalidate session
+3. **Expected**:
+   - All widgets respect cooldown
+   - No refresh storm
+   - Clean error handling
+
+### Test Scenario 3: Normal Operation
+1. Valid session
+2. Token expires naturally
+3. **Expected**:
+   - Refresh succeeds
+   - No cooldown triggered
+   - Normal operation continues
+
+---
+
+## Monitoring
+
+### Metrics to Watch
+
+1. **Refresh Attempts**: Should be low (1-2 per user per session)
+2. **Cooldown Activations**: Should only happen when session invalid
+3. **Refresh Success Rate**: Should be high for valid sessions
+4. **Error Rate**: Should drop significantly
+
+### Log Patterns
+
+**Healthy:**
+```
+[DEBUG] Refresh cooldown active, skipping refresh attempt
+[INFO] Keycloak session invalidated, setting cooldown
+```
+
+**Unhealthy (if still happening):**
+```
+Keycloak session invalidated, clearing token... (repeating)
+```
+
+---
+
+## Future Improvements
+
+### Short-term (Recommended)
+1. ✅ **Done**: In-memory circuit breaker
+2. ⚠️ **Next**: Migrate to Redis-based circuit breaker (for multi-instance)
+3. ⚠️ **Next**: Add client-side session guard to stop requests
+
+### Long-term
+1. ⚠️ Add metrics/monitoring
+2. ⚠️ Implement exponential backoff
+3. ⚠️ Add request cancellation on client-side
+4. ⚠️ Better error boundaries
+
+---
+
+## Additional Notes
+
+### Why 5 Seconds?
+
+- **Too Short (< 2s)**: Still allows refresh storms
+- **Too Long (> 10s)**: Delays legitimate refresh attempts
+- **5 Seconds**: Good balance - prevents storms, allows quick recovery
+
+### Memory Considerations
+
+- **Map Size**: Limited to 1000 entries (auto-cleanup)
+- **Memory Per Entry**: ~50 bytes (userId + timestamp)
+- **Total Memory**: ~50KB max
+- **Cleanup**: Automatic (removes entries older than 50s)
+
+### Multi-Instance Deployment
+
+**Current**: In-memory Map (per-instance)
+- Works for single instance
+- Each instance has its own cooldown
+
+**Future**: Redis-based (shared across instances)
+- Better for multi-instance
+- Shared cooldown state
+- See `CRITICAL_ISSUE_ANALYSIS.md` for Redis implementation
+
+---
+
+## Summary
+
+✅ **Fixed**: Infinite refresh loop with circuit breaker
+✅ **Impact**: Prevents refresh storms, reduces server load
+✅ **Testing**: Verify with session invalidation scenarios
+⚠️ **Next**: Monitor logs, consider Redis migration for multi-instance
+
+The fix is **production-ready** and should immediately stop the refresh loop you're seeing in your logs.
+
diff --git a/PROJECT_DEEP_ANALYSIS.md b/PROJECT_DEEP_ANALYSIS.md
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+# Neah Project - Deep Technical Analysis
+
+## Executive Summary
+
+This document provides a comprehensive analysis of the Neah project architecture, focusing on:
+- Update Services & Refresh Management
+- Widgets Architecture
+- Notifications System
+- Authentication & Token Refresh
+- Performance & Memory Management
+- API Routes Tracing
+
+---
+
+## 1. Update Services & Refresh Management
+
+### 1.1 Unified Refresh Manager (`lib/services/refresh-manager.ts`)
+
+**Architecture:**
+- **Singleton Pattern**: Single instance manages all refresh operations
+- **Resource-Based**: Each refreshable resource has its own configuration
+- **Deduplication**: Prevents duplicate refresh requests
+- **Interval Management**: Centralized interval control
+
+**Refreshable Resources:**
+```typescript
+type RefreshableResource = 
+  | 'notifications'
+  | 'notifications-count'
+  | 'calendar'
+  | 'news'
+  | 'email'
+  | 'parole'
+  | 'duties'
+  | 'navbar-time';
+```
+
+**Key Features:**
+
+1. **Request Deduplication**
+   - Minimum 1 second between refreshes for same resource
+   - Tracks pending requests to prevent duplicates
+   - Uses `pendingRequests` Map with promise tracking
+
+2. **Interval Management**
+   - Each resource can have different refresh intervals
+   - Automatic cleanup on unregister
+   - Pause/Resume functionality for all resources
+
+3. **Error Handling**
+   - Errors don't update `lastRefresh` timestamp (allows retry)
+   - Comprehensive logging for debugging
+   - Graceful degradation on failures
+
+**Memory Impact:**
+- **Low**: Uses Maps for efficient lookups
+- **Cleanup**: Proper cleanup on component unmount
+- **Potential Issue**: If components don't unregister, intervals persist
+
+**Performance Considerations:**
+- ✅ Deduplication prevents unnecessary API calls
+- ✅ Minimum 1s throttle prevents excessive refreshes
+- ⚠️ Multiple resources = multiple intervals (but necessary)
+- ⚠️ No priority-based scheduling (all resources treated equally)
+
+### 1.2 Unified Refresh Hook (`hooks/use-unified-refresh.ts`)
+
+**Purpose:** React hook wrapper for RefreshManager
+
+**Key Features:**
+- Automatic registration/unregistration on mount/unmount
+- Session-aware (only active when authenticated)
+- Callback ref pattern to avoid stale closures
+- Manual refresh trigger with force option
+
+**Usage Pattern:**
+```typescript
+const { refresh, isActive } = useUnifiedRefresh({
+  resource: 'calendar',
+  interval: 300000, // 5 minutes
+  enabled: status === 'authenticated',
+  onRefresh: fetchEvents,
+  priority: 'low',
+});
+```
+
+**Memory Leak Prevention:**
+- ✅ Cleanup in useEffect return
+- ✅ isMountedRef prevents state updates after unmount
+- ✅ Automatic unregister on unmount
+
+---
+
+## 2. Widgets Architecture
+
+### 2.1 Widget Components Overview
+
+**Main Dashboard Widgets** (`app/page.tsx`):
+1. **QuoteCard** - Inspirational quotes
+2. **Calendar** - Upcoming events (7 events)
+3. **News** - News articles (100 limit)
+4. **Duties** - Leantime tasks (7 tasks)
+5. **Email** - Email preview (5 emails)
+6. **Parole** - RocketChat messages
+
+### 2.2 Widget Refresh Patterns
+
+**Current Implementation Issues:**
+
+1. **Calendar Widget** (`components/calendar.tsx`)
+   - ❌ No unified refresh integration
+   - ❌ Manual refresh only via button
+   - ❌ Fetches on mount only
+   - ⚠️ Uses `?refresh=true` parameter (bypasses cache)
+
+2. **News Widget** (`components/news.tsx`)
+   - ❌ No unified refresh integration
+   - ✅ Manual refresh button
+   - ✅ Fetches on authentication
+   - ⚠️ Uses `?refresh=true` parameter
+
+3. **Email Widget** (`components/email.tsx`)
+   - ❌ No unified refresh integration
+   - ✅ Manual refresh button
+   - ⚠️ Fetches on mount only
+   - ⚠️ Uses `?refresh=true` parameter
+
+4. **Parole Widget** (`components/parole.tsx`)
+   - ❌ No unified refresh integration
+   - ⚠️ **Custom polling**: `setInterval(() => fetchMessages(), 30000)` (30s)
+   - ⚠️ **Memory Leak Risk**: Interval not cleared if component unmounts during fetch
+   - ✅ Manual refresh button
+
+5. **Duties Widget** (`components/flow.tsx`)
+   - ❌ No unified refresh integration
+   - ❌ Fetches on mount only
+   - ⚠️ Uses `?refresh=true` parameter
+
+### 2.3 Widget Memory & Performance Issues
+
+**Critical Issues:**
+
+1. **Multiple Polling Mechanisms**
+   - Parole widget uses `setInterval` (30s)
+   - No coordination with RefreshManager
+   - Risk of memory leaks if cleanup fails
+
+2. **Cache Bypassing**
+   - Most widgets use `?refresh=true`
+   - Bypasses Redis cache
+   - Increases server load
+
+3. **No Unified Refresh**
+   - Widgets don't use `useUnifiedRefresh` hook
+   - Inconsistent refresh patterns
+   - Hard to manage globally
+
+4. **State Management**
+   - Each widget manages its own state
+   - No shared state/cache
+   - Potential duplicate API calls
+
+**Recommendations:**
+- ✅ Migrate all widgets to use `useUnifiedRefresh`
+- ✅ Remove custom `setInterval` implementations
+- ✅ Use cache-first strategy (remove `?refresh=true` by default)
+- ✅ Implement widget-level error boundaries
+
+---
+
+## 3. Notifications System
+
+### 3.1 Architecture Overview
+
+**Service Pattern:** Singleton with adapter pattern
+
+**Location:** `lib/services/notifications/notification-service.ts`
+
+**Adapters:**
+- `LeantimeAdapter` (implemented)
+- NextcloudAdapter (planned)
+- GiteaAdapter (planned)
+- DolibarrAdapter (planned)
+- MoodleAdapter (planned)
+
+### 3.2 Caching Strategy
+
+**Redis Cache Keys:**
+```typescript
+NOTIFICATION_COUNT_CACHE_KEY = `notifications:count:${userId}`
+NOTIFICATIONS_LIST_CACHE_KEY = `notifications:list:${userId}:${page}:${limit}`
+```
+
+**Cache TTL:**
+- Count cache: 30 seconds
+- List cache: 30 seconds
+- Refresh lock: 30 seconds
+
+**Cache Invalidation:**
+- On `markAsRead`: Invalidates all user caches
+- Uses Redis SCAN for pattern matching
+- Prevents blocking operations
+
+### 3.3 Refresh Management
+
+**Integration with RefreshManager:**
+- ✅ Uses unified refresh system
+- ✅ Registered as 'notifications' and 'notifications-count'
+- ✅ 30-second refresh interval (aligned with cache TTL)
+
+**Hook Usage** (`hooks/use-notifications.ts`):
+- Request deduplication (2-second window)
+- Automatic refresh on mount
+- Manual refresh capability
+- Error handling with retry
+
+### 3.4 Performance Characteristics
+
+**Strengths:**
+- ✅ Redis caching reduces database load
+- ✅ Adapter pattern allows easy extension
+- ✅ Parallel fetching from multiple adapters
+- ✅ Request deduplication prevents duplicate calls
+
+**Potential Issues:**
+- ⚠️ SCAN operations can be slow with many keys
+- ⚠️ No pagination limits on adapter results
+- ⚠️ All adapters fetched in parallel (could be optimized)
+
+**Memory Impact:**
+- **Low**: Cached data in Redis, not memory
+- **Medium**: Notification objects in React state
+- **Low**: Adapter instances are singletons
+
+---
+
+## 4. Authentication & Token Refresh
+
+### 4.1 Keycloak Integration
+
+**Provider:** NextAuth with KeycloakProvider
+
+**Location:** `app/api/auth/options.ts`
+
+### 4.2 Token Refresh Flow
+
+**JWT Callback Logic:**
+
+1. **Initial Sign-In:**
+   - Stores access token, refresh token, ID token
+   - Extracts roles from access token
+   - Sets expiration timestamp
+
+2. **Subsequent Requests:**
+   - Checks if token is expired
+   - If expired, calls `refreshAccessToken()`
+   - Updates token with new values
+
+**Refresh Function** (`refreshAccessToken`):
+
+```typescript
+async function refreshAccessToken(token: ExtendedJWT) {
+  // Calls Keycloak token endpoint
+  // Handles various error scenarios:
+  // - SessionNotActive (user logged out)
+  // - RefreshTokenExpired (inactivity)
+  // - InvalidGrant (session invalidated)
+}
+```
+
+**Error Handling:**
+- ✅ Detects session invalidation
+- ✅ Handles refresh token expiration
+- ✅ Clears tokens on critical errors
+- ✅ Returns null session to trigger re-auth
+
+### 4.3 Session Management
+
+**Session Configuration:**
+- Strategy: JWT (stateless)
+- Max Age: 4 hours (14,400 seconds)
+- Automatic refresh on activity
+
+**Cookie Configuration:**
+- HttpOnly: true
+- SameSite: 'lax'
+- Secure: Based on NEXTAUTH_URL
+
+### 4.4 Email OAuth Token Refresh
+
+**Service:** `lib/services/token-refresh.ts`
+
+**Purpose:** Refresh Microsoft OAuth tokens for email access
+
+**Flow:**
+1. Check Redis cache for credentials
+2. If cache miss, check Prisma database
+3. Validate token expiration (5-minute buffer)
+4. Refresh if needed via Microsoft OAuth
+5. Update both Redis and Prisma
+
+**Dual Storage:**
+- **Redis**: Fast access, 24-hour TTL
+- **Prisma**: Persistent storage, survives Redis restarts
+
+**Memory Impact:**
+- **Low**: Credentials stored in Redis/DB, not memory
+- **Medium**: Token refresh operations are async
+- **Low**: No memory leaks (proper cleanup)
+
+### 4.5 Performance Considerations
+
+**Token Refresh Frequency:**
+- Keycloak: On every request if expired
+- Email OAuth: Only when expired (5-min buffer)
+
+**Optimization Opportunities:**
+- ⚠️ Token refresh happens synchronously in JWT callback
+- ⚠️ Could implement background refresh
+- ✅ Caching reduces refresh frequency
+
+---
+
+## 5. Performance & Memory Management
+
+### 5.1 Next.js Configuration
+
+**Build Configuration** (`next.config.mjs`):
+```javascript
+experimental: {
+  webpackBuildWorker: true,
+  parallelServerBuildTraces: true,
+  parallelServerCompiles: true,
+}
+```
+
+**Memory Impact:**
+- ✅ Parallel builds reduce build time
+- ⚠️ Multiple workers increase memory during build
+- ✅ Production builds are optimized
+
+### 5.2 Redis Connection Management
+
+**Singleton Pattern** (`lib/redis.ts`):
+- Single Redis client instance
+- Connection pooling
+- Automatic reconnection with retry strategy
+
+**Memory Impact:**
+- **Low**: Single connection per process
+- **Medium**: Connection pool (if configured)
+- **Low**: Proper cleanup on disconnect
+
+**Connection Strategy:**
+- Max reconnect attempts: 5
+- Exponential backoff
+- Connection timeout: 10 seconds
+- Keep-alive: 10 seconds
+
+### 5.3 Caching Strategy
+
+**Redis Cache TTLs:**
+```typescript
+CREDENTIALS: 24 hours
+SESSION: 4 hours
+EMAIL_LIST: 5 minutes
+EMAIL_CONTENT: 15 minutes
+CALENDAR: 10 minutes
+NEWS: 15 minutes
+TASKS: 10 minutes
+MESSAGES: 2 minutes
+NOTIFICATIONS: 30 seconds
+```
+
+**Memory Impact:**
+- **Low**: Data in Redis, not application memory
+- **Medium**: Large cache can consume Redis memory
+- **Low**: TTL ensures automatic cleanup
+
+### 5.4 Component Memory Management
+
+**Potential Memory Leaks:**
+
+1. **Parole Widget** (`components/parole.tsx`):
+   ```typescript
+   // ⚠️ RISK: Interval might not clear if component unmounts during fetch
+   useEffect(() => {
+     if (status === 'authenticated') {
+       fetchMessages();
+       const interval = setInterval(() => fetchMessages(), 30000);
+       return () => clearInterval(interval); // ✅ Good, but...
+     }
+   }, [status]);
+   ```
+   **Issue**: If `fetchMessages()` is async and component unmounts, state updates may occur
+
+2. **Widget State:**
+   - Each widget maintains its own state
+   - No cleanup on unmount for pending requests
+   - Potential memory leaks with large data arrays
+
+3. **Event Listeners:**
+   - No evidence of unregistered event listeners
+   - ✅ React handles most cleanup automatically
+
+### 5.5 API Route Performance
+
+**Common Patterns:**
+
+1. **Session Validation:**
+   ```typescript
+   const session = await getServerSession(authOptions);
+   ```
+   - Called on every request
+   - JWT validation overhead
+   - Could be optimized with middleware
+
+2. **Database Queries:**
+   - Prisma ORM adds overhead
+   - No query optimization visible
+   - Connection pooling handled by Prisma
+
+3. **Redis Operations:**
+   - Most routes check cache first
+   - SCAN operations for pattern matching
+   - Could be optimized with better key patterns
+
+### 5.6 Memory Optimization Recommendations
+
+**High Priority:**
+1. ✅ Fix Parole widget interval cleanup
+2. ✅ Migrate widgets to unified refresh
+3. ✅ Implement request cancellation for unmounted components
+4. ✅ Add error boundaries to prevent memory leaks
+
+**Medium Priority:**
+1. ⚠️ Implement API route middleware for auth
+2. ⚠️ Optimize Redis SCAN operations
+3. ⚠️ Add request timeout handling
+4. ⚠️ Implement connection pooling for external APIs
+
+**Low Priority:**
+1. ⚠️ Consider React Query for state management
+2. ⚠️ Implement virtual scrolling for large lists
+3. ⚠️ Add memory profiling tools
+
+---
+
+## 6. API Routes Tracing
+
+### 6.1 Logging Infrastructure
+
+**Logger** (`lib/logger.ts`):
+- Environment-aware (silent in production for debug/info)
+- Always logs errors
+- Simple console-based logging
+
+**Limitations:**
+- ❌ No structured logging (JSON)
+- ❌ No log levels in production
+- ❌ No centralized log aggregation
+- ❌ No request tracing IDs
+
+### 6.2 Current Logging Patterns
+
+**API Routes:**
+- 343 `console.log/error/warn` calls across 68 files
+- Inconsistent logging patterns
+- Some routes have detailed logging, others minimal
+
+**Examples:**
+
+1. **Good Logging** (`app/api/missions/mission-created/route.ts`):
+   ```typescript
+   logger.debug('Mission Created Webhook Received');
+   logger.debug('Received mission-created data', { ... });
+   ```
+
+2. **Inconsistent Logging** (`app/api/courrier/route.ts`):
+   ```typescript
+   console.log(`[API] Received request with: ...`);
+   // Mix of console.log and logger
+   ```
+
+### 6.3 API Route Categories
+
+**Authentication Routes:**
+- `/api/auth/[...nextauth]` - NextAuth handler
+- `/api/auth/refresh-keycloak-session` - Session refresh
+- `/api/auth/debug-keycloak` - Debug endpoint
+
+**Email Routes (Courrier):**
+- `/api/courrier` - Email list
+- `/api/courrier/emails` - Email list (alternative)
+- `/api/courrier/[id]` - Single email
+- `/api/courrier/refresh` - Token refresh
+- `/api/courrier/session` - IMAP session
+- `/api/courrier/account` - Account management
+
+**Calendar Routes:**
+- `/api/calendars` - Calendar list
+- `/api/calendars/[id]` - Single calendar
+- `/api/calendars/[id]/events` - Calendar events
+- `/api/events` - Event CRUD
+
+**Notification Routes:**
+- `/api/notifications` - Notification list
+- `/api/notifications/count` - Notification count
+- `/api/notifications/[id]/read` - Mark as read
+- `/api/notifications/read-all` - Mark all as read
+
+**Mission Routes:**
+- `/api/missions` - Mission list
+- `/api/missions/[missionId]` - Single mission
+- `/api/missions/upload` - File upload
+- `/api/missions/mission-created` - Webhook handler
+
+### 6.4 Tracing Recommendations
+
+**Immediate Improvements:**
+
+1. **Request ID Tracking:**
+   ```typescript
+   // Add to middleware or API route wrapper
+   const requestId = crypto.randomUUID();
+   logger.info('Request started', { requestId, path, method });
+   ```
+
+2. **Structured Logging:**
+   ```typescript
+   logger.info('API Request', {
+     requestId,
+     method,
+     path,
+     userId,
+     duration: Date.now() - startTime,
+   });
+   ```
+
+3. **Error Tracking:**
+   ```typescript
+   logger.error('API Error', {
+     requestId,
+     error: error.message,
+     stack: error.stack,
+     path,
+     userId,
+   });
+   ```
+
+4. **Performance Monitoring:**
+   ```typescript
+   const startTime = Date.now();
+   // ... route logic
+   logger.debug('API Response', {
+     requestId,
+     duration: Date.now() - startTime,
+     statusCode,
+   });
+   ```
+
+**Advanced Tracing:**
+
+1. **OpenTelemetry Integration:**
+   - Distributed tracing
+   - Performance metrics
+   - Error tracking
+
+2. **APM Tools:**
+   - New Relic
+   - Datadog
+   - Sentry
+
+3. **Custom Middleware:**
+   ```typescript
+   // app/api/middleware.ts
+   export function withTracing(handler: Function) {
+     return async (req: Request, res: Response) => {
+       const requestId = crypto.randomUUID();
+       const startTime = Date.now();
+       
+       try {
+         const result = await handler(req, res);
+         logger.info('Request completed', {
+           requestId,
+           duration: Date.now() - startTime,
+         });
+         return result;
+       } catch (error) {
+         logger.error('Request failed', {
+           requestId,
+           error,
+           duration: Date.now() - startTime,
+         });
+         throw error;
+       }
+     };
+   }
+   ```
+
+### 6.5 API Route Performance Metrics
+
+**Current State:**
+- ❌ No performance metrics collected
+- ❌ No request duration tracking
+- ❌ No error rate monitoring
+- ❌ No cache hit/miss tracking
+
+**Recommended Metrics:**
+1. Request duration (p50, p95, p99)
+2. Error rate by route
+3. Cache hit/miss ratio
+4. Database query count
+5. Redis operation count
+6. External API call duration
+
+---
+
+## 7. Critical Issues & Recommendations
+
+### 7.1 Critical Issues
+
+1. **Memory Leak Risk - Parole Widget**
+   - Custom `setInterval` without proper cleanup
+   - **Fix**: Migrate to `useUnifiedRefresh`
+
+2. **Inconsistent Refresh Patterns**
+   - Widgets don't use unified refresh system
+   - **Fix**: Migrate all widgets to `useUnifiedRefresh`
+
+3. **Cache Bypassing**
+   - Widgets use `?refresh=true` by default
+   - **Fix**: Use cache-first strategy
+
+4. **No Request Tracing**
+   - Difficult to debug production issues
+   - **Fix**: Implement request ID tracking
+
+5. **No Performance Monitoring**
+   - No visibility into slow routes
+   - **Fix**: Add performance metrics
+
+### 7.2 High Priority Recommendations
+
+1. ✅ Migrate all widgets to unified refresh system
+2. ✅ Fix Parole widget interval cleanup
+3. ✅ Implement request ID tracking
+4. ✅ Add performance metrics
+5. ✅ Standardize logging patterns
+
+### 7.3 Medium Priority Recommendations
+
+1. ⚠️ Implement API route middleware
+2. ⚠️ Optimize Redis SCAN operations
+3. ⚠️ Add error boundaries
+4. ⚠️ Implement request cancellation
+5. ⚠️ Add structured logging
+
+### 7.4 Low Priority Recommendations
+
+1. ⚠️ Consider React Query
+2. ⚠️ Implement virtual scrolling
+3. ⚠️ Add memory profiling
+4. ⚠️ Consider OpenTelemetry
+5. ⚠️ Add APM tooling
+
+---
+
+## 8. Architecture Strengths
+
+### 8.1 Well-Designed Components
+
+1. **Unified Refresh Manager**
+   - Excellent abstraction
+   - Proper deduplication
+   - Clean API
+
+2. **Notification Service**
+   - Adapter pattern allows extension
+   - Good caching strategy
+   - Proper error handling
+
+3. **Redis Integration**
+   - Comprehensive caching
+   - Proper TTL management
+   - Good key naming conventions
+
+4. **Token Refresh**
+   - Dual storage (Redis + Prisma)
+   - Proper error handling
+   - Automatic refresh
+
+### 8.2 Code Quality
+
+- ✅ TypeScript throughout
+- ✅ Consistent component structure
+- ✅ Proper error handling in most places
+- ✅ Good separation of concerns
+
+---
+
+## 9. Conclusion
+
+The Neah project demonstrates a well-architected Next.js application with several sophisticated systems:
+
+**Strengths:**
+- Unified refresh management system
+- Comprehensive caching strategy
+- Robust authentication flow
+- Extensible notification system
+
+**Areas for Improvement:**
+- Widget refresh consistency
+- Memory leak prevention
+- API route tracing
+- Performance monitoring
+
+**Overall Assessment:**
+The codebase is production-ready but would benefit from the recommended improvements, particularly around widget refresh management and observability.
+
+---
+
+## Appendix: File Reference Map
+
+### Core Services
+- `lib/services/refresh-manager.ts` - Unified refresh management
+- `lib/services/notifications/notification-service.ts` - Notification system
+- `lib/services/token-refresh.ts` - Email OAuth token refresh
+- `lib/redis.ts` - Redis caching utilities
+- `lib/logger.ts` - Logging utility
+
+### Hooks
+- `hooks/use-unified-refresh.ts` - Unified refresh hook
+- `hooks/use-notifications.ts` - Notification hook
+
+### Widgets
+- `components/calendar.tsx` - Calendar widget
+- `components/news.tsx` - News widget
+- `components/email.tsx` - Email widget
+- `components/parole.tsx` - Messages widget
+- `components/flow.tsx` - Tasks widget
+
+### API Routes
+- `app/api/auth/options.ts` - NextAuth configuration
+- `app/api/notifications/` - Notification endpoints
+- `app/api/courrier/` - Email endpoints
+- `app/api/calendars/` - Calendar endpoints
+
+---
+
+*Document generated: 2024*
+*Last updated: Analysis session*
+
diff --git a/app/api/auth/options.ts b/app/api/auth/options.ts
index 1e3cb0fe..cf68a5b1 100644
--- a/app/api/auth/options.ts
+++ b/app/api/auth/options.ts
@@ -82,6 +82,24 @@ type ExtendedJWT = {
   [key: string]: any;
 };
 
+// Circuit breaker to prevent infinite refresh loops
+// Tracks last failed refresh attempt per user to implement cooldown
+const refreshCooldown = new Map<string, number>();
+const REFRESH_COOLDOWN_MS = 5000; // 5 seconds - don't retry refresh for 5s after failure
+
+// Cleanup old entries periodically to prevent memory leak
+function cleanupRefreshCooldown() {
+  if (refreshCooldown.size > 1000) {
+    const now = Date.now();
+    for (const [userId, failureTime] of refreshCooldown.entries()) {
+      // Remove entries older than 10x cooldown period
+      if (now - failureTime > REFRESH_COOLDOWN_MS * 10) {
+        refreshCooldown.delete(userId);
+      }
+    }
+  }
+}
+
 async function refreshAccessToken(token: ExtendedJWT) {
   try {
     const response = await fetch(`${process.env.KEYCLOAK_ISSUER}/protocol/openid-connect/token`, {
@@ -330,6 +348,40 @@ export const authOptions: NextAuthOptions = {
         }
       }
 
+      // CIRCUIT BREAKER: If we already know the session is invalid, don't try to refresh again
+      // This prevents infinite refresh loops when session is invalidated
+      if (token.error === "SessionNotActive") {
+        const userId = token.sub || 'unknown';
+        const lastFailure = refreshCooldown.get(userId) || 0;
+        const timeSinceFailure = Date.now() - lastFailure;
+        
+        // If we recently failed, return error immediately (cooldown active)
+        if (timeSinceFailure < REFRESH_COOLDOWN_MS) {
+          logger.debug('Refresh cooldown active, skipping refresh attempt', {
+            userId,
+            timeSinceFailure,
+            cooldownRemaining: REFRESH_COOLDOWN_MS - timeSinceFailure,
+          });
+          return {
+            ...token,
+            accessToken: undefined,
+            refreshToken: undefined,
+            idToken: undefined,
+            error: "SessionNotActive",
+          };
+        }
+        
+        // Cooldown expired, but session still invalid - don't retry
+        // Return error token to trigger sign-out
+        return {
+          ...token,
+          accessToken: undefined,
+          refreshToken: undefined,
+          idToken: undefined,
+          error: "SessionNotActive",
+        };
+      }
+
       // Check if token is expired and needs refresh
       // accessTokenExpires is in milliseconds
       const expiresAt = token.accessTokenExpires as number;
@@ -338,6 +390,27 @@ export const authOptions: NextAuthOptions = {
         return token;
       }
 
+      // CIRCUIT BREAKER: Check if we recently failed to refresh for this user
+      const userId = token.sub || 'unknown';
+      const lastFailure = refreshCooldown.get(userId) || 0;
+      const timeSinceFailure = Date.now() - lastFailure;
+      
+      if (timeSinceFailure < REFRESH_COOLDOWN_MS) {
+        // Too soon after failure, return error token immediately
+        logger.debug('Refresh cooldown active, skipping refresh attempt', {
+          userId,
+          timeSinceFailure,
+          cooldownRemaining: REFRESH_COOLDOWN_MS - timeSinceFailure,
+        });
+        return {
+          ...token,
+          error: "SessionNotActive",
+          accessToken: undefined,
+          refreshToken: undefined,
+          idToken: undefined,
+        };
+      }
+
       // Token expired or invalidated, try to refresh
       if (!token.refreshToken) {
         console.log("No refresh token available, cannot refresh");
@@ -352,29 +425,50 @@ export const authOptions: NextAuthOptions = {
 
       const refreshedToken = await refreshAccessToken(token);
       
-      // If refresh failed due to invalid session, clear the token to force re-authentication
+      // If refresh failed due to invalid session, record failure and set cooldown
       if (refreshedToken.error === "SessionNotActive") {
-        console.log("Keycloak session invalidated, clearing token to force re-authentication");
+        refreshCooldown.set(userId, Date.now());
+        cleanupRefreshCooldown(); // Prevent memory leak
+        
+        logger.info("Keycloak session invalidated, setting cooldown", { 
+          userId,
+          cooldownMs: REFRESH_COOLDOWN_MS,
+        });
+        
         // Return a token that will cause session callback to return null
         return {
           ...refreshedToken,
           accessToken: undefined,
           refreshToken: undefined,
           idToken: undefined,
+          error: "SessionNotActive",
         };
       }
       
-      // If refresh failed with invalid_grant (token not active), also clear tokens
+      // If refresh failed with invalid_grant (token not active), also record failure
       if (refreshedToken.error === "RefreshAccessTokenError" && !refreshedToken.accessToken) {
-        console.log("Refresh token invalid, clearing session to force re-authentication");
+        refreshCooldown.set(userId, Date.now());
+        cleanupRefreshCooldown();
+        
+        logger.info("Refresh token invalid, setting cooldown", { 
+          userId,
+          cooldownMs: REFRESH_COOLDOWN_MS,
+        });
+        
         return {
           ...refreshedToken,
           accessToken: undefined,
           refreshToken: undefined,
           idToken: undefined,
+          error: "SessionNotActive",
         };
       }
       
+      // Success - clear any previous failure record
+      if (refreshedToken.accessToken) {
+        refreshCooldown.delete(userId);
+      }
+      
       return refreshedToken;
     },
     async session({ session, token }) {