diff --git a/components/KeyManagementManager.tsx b/components/KeyManagementManager.tsx
index 16aac59..c349346 100644
--- a/components/KeyManagementManager.tsx
+++ b/components/KeyManagementManager.tsx
@@ -11,7 +11,7 @@ interface PublicKeys {
 }
 
 export function KeyManagementManager(): React.ReactElement {
-  console.log('[KeyManagementManager] Component rendered')
+  console.warn('[KeyManagementManager] Component rendered')
 
   const [publicKeys, setPublicKeys] = useState<PublicKeys | null>(null)
   const [accountExists, setAccountExists] = useState(false)
diff --git a/components/SponsoringForm.tsx b/components/SponsoringForm.tsx
index 2d971e3..2cc9ce6 100644
--- a/components/SponsoringForm.tsx
+++ b/components/SponsoringForm.tsx
@@ -59,7 +59,7 @@ export function SponsoringForm({ author, onSuccess, onCancel }: SponsoringFormPr
 
       // Store payment info for later verification
       // The user will need to provide the transaction ID after payment
-      console.log('Sponsoring payment info:', {
+      console.warn('Sponsoring payment info:', {
         authorAddress: result.authorAddress,
         platformAddress: result.platformAddress,
         authorAmount: result.split.authorSats,
diff --git a/components/SyncProgressBar.tsx b/components/SyncProgressBar.tsx
index 7ccf7d0..4c93cba 100644
--- a/components/SyncProgressBar.tsx
+++ b/components/SyncProgressBar.tsx
@@ -7,7 +7,7 @@ import { objectCache } from '@/lib/objectCache'
 import { t } from '@/lib/i18n'
 
 export function SyncProgressBar(): React.ReactElement | null {
-  console.log('[SyncProgressBar] Component function called')
+  console.warn('[SyncProgressBar] Component function called')
 
   const [syncProgress, setSyncProgress] = useState<SyncProgress | null>(null)
   const [isSyncing, setIsSyncing] = useState(false)
@@ -39,7 +39,7 @@ export function SyncProgressBar(): React.ReactElement | null {
     // Check connection state
     const checkConnection = (): void => {
       const state = nostrAuthService.getState()
-      console.log('[SyncProgressBar] Initial connection check:', { connected: state.connected, pubkey: state.pubkey })
+      console.warn('[SyncProgressBar] Initial connection check:', { connected: state.connected, pubkey: state.pubkey })
       setConnectionState({ connected: state.connected ?? false, pubkey: state.pubkey ?? null })
       setIsInitialized(true)
     }
@@ -49,7 +49,7 @@ export function SyncProgressBar(): React.ReactElement | null {
 
     // Listen to connection changes
     const unsubscribe = nostrAuthService.subscribe((state) => {
-      console.log('[SyncProgressBar] Connection state changed:', { connected: state.connected, pubkey: state.pubkey })
+      console.warn('[SyncProgressBar] Connection state changed:', { connected: state.connected, pubkey: state.pubkey })
       setConnectionState({ connected: state.connected ?? false, pubkey: state.pubkey ?? null })
     })
 
@@ -59,25 +59,25 @@ export function SyncProgressBar(): React.ReactElement | null {
   }, [])
 
   useEffect(() => {
-    console.log('[SyncProgressBar] Effect triggered:', { isInitialized, connected: connectionState.connected, pubkey: connectionState.pubkey, isSyncing })
+    console.warn('[SyncProgressBar] Effect triggered:', { isInitialized, connected: connectionState.connected, pubkey: connectionState.pubkey, isSyncing })
 
     if (!isInitialized) {
-      console.log('[SyncProgressBar] Not initialized yet')
+      console.warn('[SyncProgressBar] Not initialized yet')
       return
     }
 
     if (!connectionState.connected) {
-      console.log('[SyncProgressBar] Not connected')
+      console.warn('[SyncProgressBar] Not connected')
       return
     }
 
     if (!connectionState.pubkey) {
-      console.log('[SyncProgressBar] No pubkey')
+      console.warn('[SyncProgressBar] No pubkey')
       return
     }
 
     void (async () => {
-      console.log('[SyncProgressBar] Starting sync check...')
+      console.warn('[SyncProgressBar] Starting sync check...')
       await loadSyncStatus()
 
       // Auto-start sync if not recently synced
@@ -85,11 +85,11 @@ export function SyncProgressBar(): React.ReactElement | null {
       const currentTimestamp = getCurrentTimestamp()
       const isRecentlySynced = storedLastSyncDate >= currentTimestamp - 3600
 
-      console.log('[SyncProgressBar] Sync status:', { storedLastSyncDate, currentTimestamp, isRecentlySynced, isSyncing })
+      console.warn('[SyncProgressBar] Sync status:', { storedLastSyncDate, currentTimestamp, isRecentlySynced, isSyncing })
 
       // Only auto-start if not recently synced
       if (!isRecentlySynced && !isSyncing && connectionState.pubkey) {
-        console.log('[SyncProgressBar] Starting auto-sync...')
+        console.warn('[SyncProgressBar] Starting auto-sync...')
         setIsSyncing(true)
         setSyncProgress({ currentStep: 0, totalSteps: 6, completed: false })
 
@@ -109,7 +109,7 @@ export function SyncProgressBar(): React.ReactElement | null {
           setError(autoSyncError instanceof Error ? autoSyncError.message : 'Erreur de synchronisation')
         }
       } else {
-        console.log('[SyncProgressBar] Skipping auto-sync:', { isRecentlySynced, isSyncing, hasPubkey: Boolean(connectionState.pubkey) })
+        console.warn('[SyncProgressBar] Skipping auto-sync:', { isRecentlySynced, isSyncing, hasPubkey: Boolean(connectionState.pubkey) })
       }
     })()
   }, [isInitialized, connectionState.connected, connectionState.pubkey, isSyncing])
@@ -159,11 +159,11 @@ export function SyncProgressBar(): React.ReactElement | null {
 
   // Don't show if not initialized or not connected
   if (!isInitialized || !connectionState.connected || !connectionState.pubkey) {
-    console.log('[SyncProgressBar] Not rendering:', { isInitialized, connected: connectionState.connected, pubkey: connectionState.pubkey })
+    console.warn('[SyncProgressBar] Not rendering:', { isInitialized, connected: connectionState.connected, pubkey: connectionState.pubkey })
     return null
   }
 
-  console.log('[SyncProgressBar] Rendering component')
+  console.warn('[SyncProgressBar] Rendering component')
 
   // Check if sync is recently completed (within last hour)
   const isRecentlySynced = lastSyncDate !== null && lastSyncDate >= getCurrentTimestamp() - 3600
diff --git a/lib/articlePublisher.ts b/lib/articlePublisher.ts
index 763a57f..80d2f22 100644
--- a/lib/articlePublisher.ts
+++ b/lib/articlePublisher.ts
@@ -106,7 +106,7 @@ export class ArticlePublisher {
    */
   private logSendResult(result: import('./articlePublisherHelpers').SendContentResult, articleId: string, recipientPubkey: string): void {
     if (result.success) {
-      console.log('Private content sent successfully', {
+      console.warn('Private content sent successfully', {
         articleId,
         recipientPubkey,
         messageEventId: result.messageEventId,
diff --git a/lib/nostr.ts b/lib/nostr.ts
index 378a547..dfcc99e 100644
--- a/lib/nostr.ts
+++ b/lib/nostr.ts
@@ -89,7 +89,7 @@ class NostrService {
         await Promise.all(pubs)
       } else {
         // Publish to all active relays
-        console.log(`[NostrService] Publishing event ${event.id} to ${activeRelays.length} active relay(s)`)
+        console.warn(`[NostrService] Publishing event ${event.id} to ${activeRelays.length} active relay(s)`)
         const pubs = this.pool.publish(activeRelays, event)
 
         // Track failed relays and mark them inactive for the session
diff --git a/lib/userContentSync.ts b/lib/userContentSync.ts
index a8c758f..f316e1e 100644
--- a/lib/userContentSync.ts
+++ b/lib/userContentSync.ts
@@ -360,18 +360,18 @@ async function fetchAndCachePurchases(
     }
 
     sub.on('event', (event: Event): void => {
-      console.log('[Sync] Received purchase event:', event.id)
+      console.warn('[Sync] Received purchase event:', event.id)
       events.push(event)
     })
 
     sub.on('eose', (): void => {
-      console.log(`[Sync] EOSE for purchases, received ${events.length} events`)
+      console.warn(`[Sync] EOSE for purchases, received ${events.length} events`)
       void done()
     })
 
     setTimeout((): void => {
       if (!finished) {
-        console.log(`[Sync] Timeout for purchases, received ${events.length} events`)
+        console.warn(`[Sync] Timeout for purchases, received ${events.length} events`)
       }
       void done()
     }, 10000).unref?.()
@@ -461,18 +461,18 @@ async function fetchAndCacheSponsoring(
     }
 
     sub.on('event', (event: Event): void => {
-      console.log('[Sync] Received sponsoring event:', event.id)
+      console.warn('[Sync] Received sponsoring event:', event.id)
       events.push(event)
     })
 
     sub.on('eose', (): void => {
-      console.log(`[Sync] EOSE for sponsoring, received ${events.length} events`)
+      console.warn(`[Sync] EOSE for sponsoring, received ${events.length} events`)
       void done()
     })
 
     setTimeout((): void => {
       if (!finished) {
-        console.log(`[Sync] Timeout for sponsoring, received ${events.length} events`)
+        console.warn(`[Sync] Timeout for sponsoring, received ${events.length} events`)
       }
       void done()
     }, 10000).unref?.()
@@ -562,18 +562,18 @@ async function fetchAndCacheReviewTips(
     }
 
     sub.on('event', (event: Event): void => {
-      console.log('[Sync] Received review tip event:', event.id)
+      console.warn('[Sync] Received review tip event:', event.id)
       events.push(event)
     })
 
     sub.on('eose', (): void => {
-      console.log(`[Sync] EOSE for review tips, received ${events.length} events`)
+      console.warn(`[Sync] EOSE for review tips, received ${events.length} events`)
       void done()
     })
 
     setTimeout((): void => {
       if (!finished) {
-        console.log(`[Sync] Timeout for review tips, received ${events.length} events`)
+        console.warn(`[Sync] Timeout for review tips, received ${events.length} events`)
       }
       void done()
     }, 10000).unref?.()
@@ -687,7 +687,7 @@ async function fetchAndCachePaymentNotes(
       sub.on('event', (event: Event): void => {
         const tags = extractTagsFromEvent(event)
         if (tags.type === 'payment' && tags.payment) {
-          console.log('[Sync] Received payment note event:', event.id)
+          console.warn('[Sync] Received payment note event:', event.id)
           // Deduplicate events (same event might match both filters)
           if (!events.some((e) => e.id === event.id)) {
             events.push(event)
@@ -698,7 +698,7 @@ async function fetchAndCachePaymentNotes(
       sub.on('eose', (): void => {
         eoseCount++
         if (eoseCount >= subscriptions.length) {
-          console.log(`[Sync] EOSE for payment notes, received ${events.length} events`)
+          console.warn(`[Sync] EOSE for payment notes, received ${events.length} events`)
           void done()
         }
       })
@@ -706,7 +706,7 @@ async function fetchAndCachePaymentNotes(
 
     setTimeout((): void => {
       if (!finished) {
-        console.log(`[Sync] Timeout for payment notes, received ${events.length} events`)
+        console.warn(`[Sync] Timeout for payment notes, received ${events.length} events`)
       }
       void done()
     }, 10000).unref?.()
@@ -763,51 +763,51 @@ export async function syncUserContentToCache(
     }
 
     // Fetch and cache author profile (already caches itself)
-    console.log('[Sync] Step 1/7: Fetching author profile...')
+    console.warn('[Sync] Step 1/7: Fetching author profile...')
     await fetchAuthorPresentationFromPool(poolWithSub, userPubkey)
-    console.log('[Sync] Step 1/7: Author profile fetch completed')
+    console.warn('[Sync] Step 1/7: Author profile fetch completed')
     currentStep++
     updateProgress(currentStep)
 
     // Fetch and cache all series
-    console.log('[Sync] Step 2/7: Fetching series...')
+    console.warn('[Sync] Step 2/7: Fetching series...')
     await fetchAndCacheSeries(poolWithSub, userPubkey)
     currentStep++
     updateProgress(currentStep)
 
     // Fetch and cache all publications
-    console.log('[Sync] Step 3/7: Fetching publications...')
+    console.warn('[Sync] Step 3/7: Fetching publications...')
     await fetchAndCachePublications(poolWithSub, userPubkey)
     currentStep++
     updateProgress(currentStep)
 
     // Fetch and cache all purchases (as payer)
-    console.log('[Sync] Step 4/7: Fetching purchases...')
+    console.warn('[Sync] Step 4/7: Fetching purchases...')
     await fetchAndCachePurchases(poolWithSub, userPubkey)
     currentStep++
     updateProgress(currentStep)
 
     // Fetch and cache all sponsoring (as author)
-    console.log('[Sync] Step 5/7: Fetching sponsoring...')
+    console.warn('[Sync] Step 5/7: Fetching sponsoring...')
     await fetchAndCacheSponsoring(poolWithSub, userPubkey)
     currentStep++
     updateProgress(currentStep)
 
     // Fetch and cache all review tips (as author)
-    console.log('[Sync] Step 6/7: Fetching review tips...')
+    console.warn('[Sync] Step 6/7: Fetching review tips...')
     await fetchAndCacheReviewTips(poolWithSub, userPubkey)
     currentStep++
     updateProgress(currentStep)
 
     // Fetch and cache all payment notes (kind 1 with type='payment')
-    console.log('[Sync] Step 7/7: Fetching payment notes...')
+    console.warn('[Sync] Step 7/7: Fetching payment notes...')
     await fetchAndCachePaymentNotes(poolWithSub, userPubkey)
     currentStep++
     updateProgress(currentStep, true)
 
     // Store the current timestamp as last sync date
     await setLastSyncDate(currentTimestamp)
-    console.log('[Sync] Synchronization completed successfully')
+    console.warn('[Sync] Synchronization completed successfully')
   } catch (syncError) {
     console.error('Error syncing user content to cache:', syncError)
     throw syncError // Re-throw to allow UI to handle it
diff --git a/pages/api/nip95-upload.ts b/pages/api/nip95-upload.ts
index 31c40cf..6c2540f 100644
--- a/pages/api/nip95-upload.ts
+++ b/pages/api/nip95-upload.ts
@@ -97,7 +97,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
 
           // Log request details for debugging (only for problematic endpoints)
           if (url.hostname.includes('nostrimg.com')) {
-            console.log('NIP-95 proxy request to nostrimg.com:', {
+            console.warn('NIP-95 proxy request to nostrimg.com:', {
               url: url.toString(),
         method: 'POST',
               fieldName,
@@ -131,7 +131,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
               try {
                 // Handle relative and absolute URLs
                 redirectUrl = new URL(location, url.toString())
-                console.log('NIP-95 proxy redirect:', {
+                console.warn('NIP-95 proxy redirect:', {
                   from: url.toString(),
                   to: redirectUrl.toString(),
                   statusCode,
@@ -160,7 +160,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
             proxyResponse.on('end', () => {
               // Log response details for debugging problematic endpoints
               if (url.hostname.includes('nostrimg.com')) {
-                console.log('NIP-95 proxy response from nostrimg.com:', {
+                console.warn('NIP-95 proxy response from nostrimg.com:', {
                   url: url.toString(),
                   statusCode,
                   statusMessage: proxyResponse.statusMessage,