diff --git a/RESUME-DEPLOIEMENT.md b/RESUME-DEPLOIEMENT.md
deleted file mode 100644
index 8af0488..0000000
--- a/RESUME-DEPLOIEMENT.md
+++ /dev/null
@@ -1,143 +0,0 @@
-# Résumé du déploiement - zapwall.fr
-
-## ✅ Actions effectuées
-
-1. **Déploiement initial** : Application déployée sur `/var/www/zapwall.fr`
-2. **Service systemd** : Service `zapwall.service` créé et actif
-3. **Configuration nginx** : Reverse proxy configuré dans le conteneur Docker
-4. **HTTPS** : Configuration HTTPS avec redirection automatique HTTP → HTTPS
-5. **Firewall** : Ports 80 et 443 ouverts
-
-## 📍 État actuel
-
-- **Service** : ✅ Actif sur le port 3001
-- **Répertoire** : `/var/www/zapwall.fr` (correct)
-- **HTTPS** : ✅ Configuré avec certificats auto-signés
-- **Certificats Let's Encrypt** : ⚠️ Non obtenus (bug certbot avec Python 3.11)
-
-## 🔧 Problèmes identifiés et solutions
-
-### 1. Certificats Let's Encrypt
-
-**Problème** : Certbot présente un bug (AttributeError) avec Python 3.11
-
-**Solutions** :
-- Utiliser certbot via snap (recommandé) :
-  ```bash
-  ssh debian@92.243.27.35
-  sudo snap install certbot --classic
-  sudo docker stop lecoffre_nginx_test
-  sudo certbot certonly --standalone -d zapwall.fr --non-interactive --agree-tos --email admin@zapwall.fr
-  sudo docker start lecoffre_nginx_test
-  ```
-
-### 2. Configuration nginx
-
-**Vérification** : La configuration pointe bien vers le port 3001 (correct)
-- `proxy_pass http://172.17.0.1:3001;` ✅
-
-**Note** : La configuration principale nginx.conf contient aussi une config pour `test-lecoffreio.4nkweb.com`, mais elle ne devrait pas interférer car elle utilise un `server_name` différent.
-
-## 📝 Mise à jour du site depuis Git
-
-### Méthode recommandée : Script automatique
-
-Depuis votre machine locale, dans le répertoire du projet :
-
-```bash
-# Mise à jour depuis la branche actuelle
-./update-from-git.sh
-
-# Ou spécifier une branche
-./update-from-git.sh main
-```
-
-Le script :
-1. Transfère les fichiers depuis votre dépôt Git local
-2. Installe les dépendances (`npm ci`)
-3. Construit l'application (`npm run build`)
-4. Redémarre le service
-5. Vérifie que tout fonctionne
-
-### Méthode manuelle
-
-Si vous préférez faire manuellement :
-
-```bash
-# 1. Transférer les fichiers
-tar --exclude='node_modules' \
-    --exclude='.next' \
-    --exclude='.git' \
-    --exclude='*.tsbuildinfo' \
-    --exclude='.env*.local' \
-    --exclude='.cursor' \
-    -czf - . | ssh debian@92.243.27.35 "cd /var/www/zapwall.fr && tar -xzf -"
-
-# 2. Sur le serveur
-ssh debian@92.243.27.35
-cd /var/www/zapwall.fr
-npm ci
-npm run build
-sudo systemctl restart zapwall
-```
-
-### Initialiser un dépôt Git sur le serveur (optionnel)
-
-Si vous voulez pouvoir faire `git pull` directement sur le serveur :
-
-```bash
-ssh debian@92.243.35
-cd /var/www/zapwall.fr
-git init
-git remote add origin https://git.4nkweb.com/4nk/story-research-zapwall.git
-git fetch origin
-git checkout main  # ou la branche souhaitée
-```
-
-Ensuite, vous pourrez utiliser :
-```bash
-ssh debian@92.243.27.35 'cd /var/www/zapwall.fr && git pull && npm ci && npm run build && sudo systemctl restart zapwall'
-```
-
-## 🔍 Commandes de vérification
-
-### Vérifier le service
-```bash
-ssh debian@92.243.27.35 'sudo systemctl status zapwall'
-```
-
-### Voir les logs
-```bash
-ssh debian@92.243.27.35 'sudo journalctl -u zapwall -f'
-```
-
-### Vérifier le port
-```bash
-ssh debian@92.243.27.35 'sudo ss -tuln | grep 3001'
-```
-
-### Vérifier la configuration nginx
-```bash
-ssh debian@92.243.27.35 'sudo docker exec lecoffre_nginx_test cat /etc/nginx/conf.d/zapwall.fr.conf'
-```
-
-## 📚 Fichiers de documentation créés
-
-- `README-DEPLOYMENT.md` : Guide complet de déploiement et mise à jour
-- `update-from-git.sh` : Script de mise à jour automatique
-- `fix-nginx-config.sh` : Script de correction de la configuration
-- `check-deployment-status.sh` : Script de vérification de l'état
-
-## 🚀 Prochaines étapes recommandées
-
-1. **Obtenir les certificats Let's Encrypt** via snap (voir ci-dessus)
-2. **Configurer le renouvellement automatique** des certificats
-3. **Tester l'accès** au site en HTTPS
-4. **Configurer un dépôt Git sur le serveur** pour faciliter les mises à jour
-
-## ⚠️ Notes importantes
-
-- Le site fonctionne actuellement avec des certificats auto-signés (avertissement navigateur)
-- Les modifications de code nécessitent un rebuild et un redémarrage du service
-- Le service doit être actif pour que le site soit accessible
-- Nginx fait un reverse proxy vers le port 3001 où tourne l'application Next.js
diff --git a/components/ArticleFilters.tsx b/components/ArticleFilters.tsx
index 422fed7..8b03450 100644
--- a/components/ArticleFilters.tsx
+++ b/components/ArticleFilters.tsx
@@ -109,7 +109,7 @@ export function ArticleFiltersComponent({
 }: ArticleFiltersProps): React.ReactElement {
   const data = useFiltersData(articles)
 
-  const handleClearFilters = () => {
+  const handleClearFilters = (): void => {
     onFiltersChange({
       authorPubkey: null,
       sortBy: 'newest',
diff --git a/components/AuthorFilterDropdown.tsx b/components/AuthorFilterDropdown.tsx
index 860d2e4..29e8074 100644
--- a/components/AuthorFilterDropdown.tsx
+++ b/components/AuthorFilterDropdown.tsx
@@ -64,7 +64,7 @@ export function AllAuthorsOption({
   value: string | null
   onChange: (value: string | null) => void
   setIsOpen: (open: boolean) => void
-}) {
+}): React.ReactElement {
   return (
     <button
       type="button"
diff --git a/components/AuthorPresentationEditor.tsx b/components/AuthorPresentationEditor.tsx
index 54e246f..4bf2272 100644
--- a/components/AuthorPresentationEditor.tsx
+++ b/components/AuthorPresentationEditor.tsx
@@ -23,7 +23,7 @@ interface AuthorPresentationDraft {
 
 const ADDRESS_PATTERN = /^(1|3|bc1)[a-zA-Z0-9]{25,62}$/
 
-function SuccessNotice({ pubkey }: { pubkey: string | null }) {
+function SuccessNotice({ pubkey }: { pubkey: string | null }): React.ReactElement {
   return (
     <div className="border border-neon-green/50 rounded-lg p-6 bg-neon-green/10">
       <h3 className="text-lg font-semibold text-neon-green mb-2">{t('presentation.success')}</h3>
@@ -44,7 +44,7 @@ function SuccessNotice({ pubkey }: { pubkey: string | null }) {
   )
 }
 
-function ValidationError({ message }: { message: string | null }) {
+function ValidationError({ message }: { message: string | null }): React.ReactElement | null {
   if (!message) {
     return null
   }
@@ -61,7 +61,7 @@ function PresentationField({
 }: {
   draft: AuthorPresentationDraft
   onChange: (next: AuthorPresentationDraft) => void
-}) {
+}): React.ReactElement {
   return (
     <ArticleField
       id="presentation"
@@ -83,7 +83,7 @@ function ContentDescriptionField({
 }: {
   draft: AuthorPresentationDraft
   onChange: (next: AuthorPresentationDraft) => void
-}) {
+}): React.ReactElement {
   return (
     <ArticleField
       id="contentDescription"
@@ -105,7 +105,7 @@ function MainnetAddressField({
 }: {
   draft: AuthorPresentationDraft
   onChange: (next: AuthorPresentationDraft) => void
-}) {
+}): React.ReactElement {
   return (
     <ArticleField
       id="mainnetAddress"
@@ -126,7 +126,7 @@ function AuthorNameField({
 }: {
   draft: AuthorPresentationDraft
   onChange: (next: AuthorPresentationDraft) => void
-}) {
+}): React.ReactElement {
   return (
     <ArticleField
       id="authorName"
@@ -147,7 +147,7 @@ function PictureField({
 }: {
   draft: AuthorPresentationDraft
   onChange: (next: AuthorPresentationDraft) => void
-}) {
+}): React.ReactElement {
   return (
     <ImageUploadField
       id="picture"
@@ -163,7 +163,7 @@ const PresentationFields = ({
 }: {
   draft: AuthorPresentationDraft
   onChange: (next: AuthorPresentationDraft) => void
-}) => (
+}): React.ReactElement => (
   <div className="space-y-4">
     <AuthorNameField draft={draft} onChange={onChange} />
     <PictureField draft={draft} onChange={onChange} />
@@ -173,7 +173,7 @@ const PresentationFields = ({
   </div>
 )
 
-function DeleteButton({ onDelete, deleting }: { onDelete: () => void; deleting: boolean }) {
+function DeleteButton({ onDelete, deleting }: { onDelete: () => void; deleting: boolean }): React.ReactElement {
   return (
     <button
       type="button"
@@ -206,7 +206,7 @@ function PresentationForm({
   deleting: boolean
   handleDelete: () => void
   hasExistingPresentation: boolean
-}) {
+}): React.ReactElement {
   return (
     <form
       onSubmit={(e: FormEvent<HTMLFormElement>) => {
@@ -239,7 +239,17 @@ function PresentationForm({
   )
 }
 
-function useAuthorPresentationState(pubkey: string | null, existingAuthorName?: string, existingPresentation?: Article | null) {
+function useAuthorPresentationState(pubkey: string | null, existingAuthorName?: string, existingPresentation?: Article | null): {
+  draft: AuthorPresentationDraft
+  setDraft: (next: AuthorPresentationDraft) => void
+  validationError: string | null
+  error: string | null
+  loading: boolean
+  handleSubmit: (e: FormEvent<HTMLFormElement>) => Promise<void>
+  deleting: boolean
+  handleDelete: () => Promise<void>
+  success: boolean
+} {
   const { loading, error, success, publishPresentation, deletePresentation } = useAuthorPresentation(pubkey)
   const router = useRouter()
   const [draft, setDraft] = useState<AuthorPresentationDraft>(() => {
@@ -310,7 +320,7 @@ function useAuthorPresentationState(pubkey: string | null, existingAuthorName?:
     }
   }, [existingPresentation, deletePresentation, router])
 
-  return { loading, error, success, draft, setDraft, validationError, handleSubmit, deleting, handleDelete, existingPresentation }
+  return { loading, error, success, draft, setDraft, validationError, handleSubmit, deleting, handleDelete }
 }
 
 function NoAccountActionButtons({
@@ -319,7 +329,7 @@ function NoAccountActionButtons({
 }: {
   onGenerate: () => void
   onImport: () => void
-}) {
+}): React.ReactElement {
   return (
     <div className="flex flex-col gap-3 w-full max-w-xs">
       <button
@@ -338,7 +348,7 @@ function NoAccountActionButtons({
   )
 }
 
-function NoAccountView() {
+function NoAccountView(): React.ReactElement {
   const [showImportModal, setShowImportModal] = useState(false)
   const [showRecoveryStep, setShowRecoveryStep] = useState(false)
   const [showUnlockModal, setShowUnlockModal] = useState(false)
@@ -347,7 +357,7 @@ function NoAccountView() {
   const [generating, setGenerating] = useState(false)
   const [error, setError] = useState<string | null>(null)
 
-  const handleGenerate = async () => {
+  const handleGenerate = async (): Promise<void> => {
     setGenerating(true)
     setError(null)
     try {
@@ -363,12 +373,12 @@ function NoAccountView() {
     }
   }
 
-  const handleRecoveryContinue = () => {
+  const handleRecoveryContinue = (): void => {
     setShowRecoveryStep(false)
     setShowUnlockModal(true)
   }
 
-  const handleUnlockSuccess = () => {
+  const handleUnlockSuccess = (): void => {
     setShowUnlockModal(false)
     setRecoveryPhrase([])
     setNpub('')
@@ -422,13 +432,13 @@ function AuthorPresentationFormView({
 }: {
   pubkey: string | null
   profile: { name?: string; pubkey: string } | null
-}) {
+}): React.ReactElement {
   const { checkPresentationExists } = useAuthorPresentation(pubkey)
   const [existingPresentation, setExistingPresentation] = useState<Article | null>(null)
   const [loadingPresentation, setLoadingPresentation] = useState(true)
 
   useEffect(() => {
-    const load = async () => {
+    const load = async (): Promise<void> => {
       if (!pubkey) {
         setLoadingPresentation(false)
         return
@@ -478,7 +488,7 @@ function AuthorPresentationFormView({
   )
 }
 
-function useAutoLoadPubkey(accountExists: boolean | null, pubkey: string | null, connect: () => Promise<void>) {
+function useAutoLoadPubkey(accountExists: boolean | null, pubkey: string | null, connect: () => Promise<void>): void {
   useEffect(() => {
     if (accountExists === true && !pubkey) {
       void connect()
@@ -486,7 +496,7 @@ function useAutoLoadPubkey(accountExists: boolean | null, pubkey: string | null,
   }, [accountExists, pubkey, connect])
 }
 
-export function AuthorPresentationEditor() {
+export function AuthorPresentationEditor(): React.ReactElement {
   const { pubkey, profile, accountExists, connect } = useNostrAuth()
   useAutoLoadPubkey(accountExists, pubkey ?? null, connect)
   return <AuthorPresentationFormView pubkey={pubkey ?? null} profile={profile} />
diff --git a/components/CreateAccountModalComponents.tsx b/components/CreateAccountModalComponents.tsx
index fa9a1d3..81eb2b6 100644
--- a/components/CreateAccountModalComponents.tsx
+++ b/components/CreateAccountModalComponents.tsx
@@ -1,6 +1,6 @@
 import { t } from '@/lib/i18n'
 
-export function RecoveryWarning() {
+export function RecoveryWarning(): React.ReactElement {
   return (
     <div className="bg-yellow-900/20 border border-yellow-400/50 rounded-lg p-4 mb-6">
       <p className="text-yellow-400 font-semibold mb-2">{t('account.create.recovery.warning.title')}</p>
diff --git a/components/HomeView.tsx b/components/HomeView.tsx
index bcf9c81..82b3f07 100644
--- a/components/HomeView.tsx
+++ b/components/HomeView.tsx
@@ -27,7 +27,7 @@ interface HomeViewProps {
   unlockedArticles: Set<string>
 }
 
-function HomeHead() {
+function HomeHead(): React.ReactElement {
   return (
     <Head>
       <title>zapwall.fr</title>
diff --git a/components/SyncProgressBar.tsx b/components/SyncProgressBar.tsx
index e1bc5de..8131f5f 100644
--- a/components/SyncProgressBar.tsx
+++ b/components/SyncProgressBar.tsx
@@ -39,6 +39,10 @@ export function SyncProgressBar(): React.ReactElement | null {
     }
   }
 
+  useEffect(() => {
+    void loadSyncStatus()
+  }, [])
+
   async function startSync(): Promise<void> {
     try {
       const state = nostrAuthService.getState()
@@ -47,7 +51,7 @@ export function SyncProgressBar(): React.ReactElement | null {
       }
 
       setIsSyncing(true)
-      setSyncProgress({ currentDay: 0, totalDays, completed: false })
+      setSyncProgress({ currentStep: 0, totalSteps: 6, completed: false })
 
       await syncUserContentToCache(state.pubkey, (progress) => {
         setSyncProgress(progress)
@@ -78,8 +82,8 @@ export function SyncProgressBar(): React.ReactElement | null {
     return null
   }
 
-  const progressPercentage = syncProgress && totalDays > 0
-    ? Math.min(100, (syncProgress.currentDay / totalDays) * 100)
+  const progressPercentage = syncProgress && syncProgress.totalSteps > 0
+    ? Math.min(100, (syncProgress.currentStep / syncProgress.totalSteps) * 100)
     : 0
 
   const formatDate = (timestamp: number): string => {
@@ -133,8 +137,8 @@ export function SyncProgressBar(): React.ReactElement | null {
           <div className="flex items-center justify-between text-sm">
             <span className="text-cyber-accent">
               {t('settings.sync.progress', {
-                current: syncProgress.currentDay,
-                total: syncProgress.totalDays,
+                current: syncProgress.currentStep,
+                total: syncProgress.totalSteps,
               })}
             </span>
             <span className="text-neon-cyan font-semibold">
diff --git a/lib/alby.ts b/lib/alby.ts
index db8c52f..97e8ab7 100644
--- a/lib/alby.ts
+++ b/lib/alby.ts
@@ -160,7 +160,7 @@ export class AlbyService {
     const startTime = Date.now()
 
     return new Promise((resolve) => {
-      const checkPayment = () => {
+      const checkPayment = (): void => {
         try {
           const status = this.checkPaymentStatus(paymentHash)
 
diff --git a/lib/articlePublisherHelpersEncryption.ts b/lib/articlePublisherHelpersEncryption.ts
index 04bebdb..7518b79 100644
--- a/lib/articlePublisherHelpersEncryption.ts
+++ b/lib/articlePublisherHelpersEncryption.ts
@@ -16,7 +16,12 @@ export function prepareKeyData(storedContent: { content: string; decryptionKey?:
   return storedContent.content // Fallback to old behavior if keys are not available
 }
 
-export function buildPrivateMessageEvent(recipientPubkey: string, articleId: string, encryptedKey: string) {
+export function buildPrivateMessageEvent(recipientPubkey: string, articleId: string, encryptedKey: string): {
+  kind: number
+  created_at: number
+  tags: string[][]
+  content: string
+} {
   return {
     kind: 4,
     created_at: Math.floor(Date.now() / 1000),
diff --git a/lib/automaticTransfer.ts b/lib/automaticTransfer.ts
index 4a94e12..6946f57 100644
--- a/lib/automaticTransfer.ts
+++ b/lib/automaticTransfer.ts
@@ -22,7 +22,7 @@ export class AutomaticTransferService {
    * Transfer author portion after article payment
    * Creates a Lightning invoice from the platform to the author
    */
-  private logTransferRequired(type: 'article' | 'review', id: string, pubkey: string, amount: number, recipient: string, platformCommission: number) {
+  private logTransferRequired(type: 'article' | 'review', id: string, pubkey: string, amount: number, recipient: string, platformCommission: number): void {
     const logData = {
       [type === 'article' ? 'articleId' : 'reviewId']: id,
       [type === 'article' ? 'articlePubkey' : 'reviewerPubkey']: pubkey,
diff --git a/lib/contentDeliveryVerification.ts b/lib/contentDeliveryVerification.ts
index 16175a3..978724d 100644
--- a/lib/contentDeliveryVerification.ts
+++ b/lib/contentDeliveryVerification.ts
@@ -15,7 +15,14 @@ export interface ContentDeliveryStatus {
  * Verify that private content was successfully delivered to recipient
  * Checks multiple aspects to ensure delivery certainty
  */
-function createContentDeliveryFilters(authorPubkey: string, recipientPubkey: string, articleId: string, messageEventId: string) {
+function createContentDeliveryFilters(authorPubkey: string, recipientPubkey: string, articleId: string, messageEventId: string): Array<{
+  kinds: number[]
+  ids?: string[]
+  authors: string[]
+  '#p': string[]
+  '#e': string[]
+  limit: number
+}> {
   const filters: Array<{
     kinds: number[]
     ids?: string[]
@@ -76,7 +83,7 @@ function createContentDeliverySubscription(
   recipientPubkey: string,
   articleId: string,
   messageEventId: string
-) {
+): import('@/types/nostr-tools-extended').Subscription {
   const filters = createContentDeliveryFilters(authorPubkey, recipientPubkey, articleId, messageEventId)
   const relayUrl = getPrimaryRelaySync()
   return createSubscription(pool, [relayUrl], filters)
@@ -89,7 +96,7 @@ function createContentDeliveryPromise(
   return new Promise((resolve) => {
     let resolved = false
 
-    const finalize = (result: ContentDeliveryStatus) => {
+    const finalize = (result: ContentDeliveryStatus): void => {
       if (resolved) {
         return
       }
diff --git a/lib/mempoolSpaceConfirmation.ts b/lib/mempoolSpaceConfirmation.ts
index 8ffc534..0810db8 100644
--- a/lib/mempoolSpaceConfirmation.ts
+++ b/lib/mempoolSpaceConfirmation.ts
@@ -3,7 +3,7 @@ import type { TransactionVerificationResult } from './mempoolSpaceTypes'
 import { getTransaction } from './mempoolSpaceApi'
 import { verifySponsoringTransaction } from './mempoolSpaceVerification'
 
-export function scheduleNextCheck(checkConfirmation: () => void, interval: number) {
+export function scheduleNextCheck(checkConfirmation: () => void, interval: number): void {
   setTimeout(() => {
     void checkConfirmation()
   }, interval)
@@ -53,7 +53,7 @@ export async function waitForConfirmation(
   const startTime = Date.now()
 
   return new Promise((resolve) => {
-    const checkConfirmation = async () => {
+    const checkConfirmation = async (): Promise<void> => {
       await checkTransactionStatus(txid, startTime, timeout, interval, resolve, checkConfirmation)
     }
     void checkConfirmation()
diff --git a/lib/nostrTagSystemExtract.ts b/lib/nostrTagSystemExtract.ts
index 0b40f51..be1f6fd 100644
--- a/lib/nostrTagSystemExtract.ts
+++ b/lib/nostrTagSystemExtract.ts
@@ -111,8 +111,8 @@ export function extractTagsFromEvent(event: { tags: string[][] }): {
   json?: string | undefined
   [key: string]: unknown
 } {
-  const findTag = (key: string) => event.tags.find((tag) => tag[0] === key)?.[1]
-  const hasTag = (key: string) => event.tags.some((tag) => tag[0] === key || (tag.length === 1 && tag[0] === key))
+  const findTag = (key: string): string | undefined => event.tags.find((tag) => tag[0] === key)?.[1]
+  const hasTag = (key: string): boolean => event.tags.some((tag) => tag[0] === key || (tag.length === 1 && tag[0] === key))
   const typeCategory = extractTypeAndCategory(event)
   const commonTags = extractCommonTags(findTag, hasTag)
 
diff --git a/lib/userContentSync.ts b/lib/userContentSync.ts
index 6776a1c..5eea6e1 100644
--- a/lib/userContentSync.ts
+++ b/lib/userContentSync.ts
@@ -390,8 +390,8 @@ async function fetchAndCacheReviewTips(
 }
 
 export interface SyncProgress {
-  currentDay: number
-  totalDays: number
+  currentStep: number
+  totalSteps: number
   completed: boolean
 }
 
@@ -399,7 +399,7 @@ export interface SyncProgress {
  * Synchronize all user content to IndexedDB cache
  * Fetches profile, series, publications, purchases, sponsoring, and review tips and caches them
  * @param userPubkey - The user's public key
- * @param onProgress - Optional callback to report progress (currentDay, totalDays, completed)
+ * @param onProgress - Optional callback to report progress (currentStep, totalSteps, completed)
  */
 export async function syncUserContentToCache(
   userPubkey: string,
@@ -414,59 +414,59 @@ export async function syncUserContentToCache(
 
     const poolWithSub = pool as unknown as SimplePoolWithSub
 
-    // Get last sync date and calculate days
-    const { getLastSyncDate, setLastSyncDate, getCurrentTimestamp, calculateDaysBetween } = await import('./syncStorage')
-    const lastSyncDate = await getLastSyncDate()
+    // Get current timestamp for last sync date
+    const { setLastSyncDate, getCurrentTimestamp } = await import('./syncStorage')
     const currentTimestamp = getCurrentTimestamp()
-    const totalDays = calculateDaysBetween(lastSyncDate, currentTimestamp)
+
+    const TOTAL_STEPS = 6
 
     // Report initial progress
     if (onProgress) {
-      onProgress({ currentDay: 0, totalDays, completed: false })
+      onProgress({ currentStep: 0, totalSteps: TOTAL_STEPS, completed: false })
     }
 
-    let currentDay = 0
+    let currentStep = 0
 
     // Fetch and cache author profile (already caches itself)
     await fetchAuthorPresentationFromPool(poolWithSub, userPubkey)
-    currentDay++
+    currentStep++
     if (onProgress) {
-      onProgress({ currentDay, totalDays, completed: false })
+      onProgress({ currentStep, totalSteps: TOTAL_STEPS, completed: false })
     }
 
     // Fetch and cache all series
     await fetchAndCacheSeries(poolWithSub, userPubkey)
-    currentDay++
+    currentStep++
     if (onProgress) {
-      onProgress({ currentDay, totalDays, completed: false })
+      onProgress({ currentStep, totalSteps: TOTAL_STEPS, completed: false })
     }
 
     // Fetch and cache all publications
     await fetchAndCachePublications(poolWithSub, userPubkey)
-    currentDay++
+    currentStep++
     if (onProgress) {
-      onProgress({ currentDay, totalDays, completed: false })
+      onProgress({ currentStep, totalSteps: TOTAL_STEPS, completed: false })
     }
 
     // Fetch and cache all purchases (as payer)
     await fetchAndCachePurchases(poolWithSub, userPubkey)
-    currentDay++
+    currentStep++
     if (onProgress) {
-      onProgress({ currentDay, totalDays, completed: false })
+      onProgress({ currentStep, totalSteps: TOTAL_STEPS, completed: false })
     }
 
     // Fetch and cache all sponsoring (as author)
     await fetchAndCacheSponsoring(poolWithSub, userPubkey)
-    currentDay++
+    currentStep++
     if (onProgress) {
-      onProgress({ currentDay, totalDays, completed: false })
+      onProgress({ currentStep, totalSteps: TOTAL_STEPS, completed: false })
     }
 
     // Fetch and cache all review tips (as author)
     await fetchAndCacheReviewTips(poolWithSub, userPubkey)
-    currentDay++
+    currentStep++
     if (onProgress) {
-      onProgress({ currentDay, totalDays, completed: true })
+      onProgress({ currentStep, totalSteps: TOTAL_STEPS, completed: true })
     }
 
     // Store the current timestamp as last sync date
diff --git a/lib/zapAggregation.ts b/lib/zapAggregation.ts
index ec0ed3d..bbb1e52 100644
--- a/lib/zapAggregation.ts
+++ b/lib/zapAggregation.ts
@@ -12,7 +12,12 @@ interface ZapAggregationFilter {
   timeoutMs?: number
 }
 
-function buildFilters(params: ZapAggregationFilter) {
+function buildFilters(params: ZapAggregationFilter): Array<{
+  kinds: number[]
+  since?: number
+  '#p'?: string[]
+  '#e'?: string[]
+}> {
   const filters = [
     {
       kinds: [9735],
@@ -59,7 +64,7 @@ function collectZap(
     let total = 0
     let finished = false
 
-    const done = () => {
+    const done = (): void => {
       if (finished) {
         return
       }
@@ -68,7 +73,7 @@ function collectZap(
       resolve(total)
     }
 
-    const onError = (err: unknown) => {
+    const onError = (err: unknown): void => {
       if (finished) {
         return
       }
diff --git a/lib/zapReceiptQueries.ts b/lib/zapReceiptQueries.ts
index 5c1b003..2f08037 100644
--- a/lib/zapReceiptQueries.ts
+++ b/lib/zapReceiptQueries.ts
@@ -26,7 +26,7 @@ export async function getZapReceiptById(zapReceiptId: string): Promise<Event | n
   return new Promise<Event | null>((resolve) => {
     let resolved = false
 
-    const finalize = (value: Event | null) => {
+    const finalize = (value: Event | null): void => {
       if (resolved) {
         return
       }
diff --git a/pages/_app.tsx b/pages/_app.tsx
index 107d92b..a80069a 100644
--- a/pages/_app.tsx
+++ b/pages/_app.tsx
@@ -4,7 +4,7 @@ import { useI18n } from '@/hooks/useI18n'
 import React from 'react'
 import { platformSyncService } from '@/lib/platformSync'
 
-function I18nProvider({ children }: { children: React.ReactNode }) {
+function I18nProvider({ children }: { children: React.ReactNode }): React.ReactElement {
   // Get saved locale from localStorage or default to French
   const getInitialLocale = (): 'fr' | 'en' => {
     if (typeof window === 'undefined') {
diff --git a/pages/api/docs/[file].ts b/pages/api/docs/[file].ts
index dfa37c1..84df304 100644
--- a/pages/api/docs/[file].ts
+++ b/pages/api/docs/[file].ts
@@ -4,7 +4,7 @@ import path from 'path'
 
 const DOCS_DIR = path.join(process.cwd(), 'docs')
 
-export default function handler(req: NextApiRequest, res: NextApiResponse) {
+export default function handler(req: NextApiRequest, res: NextApiResponse): void {
   const { file } = req.query
   const locale = (req.query.locale as string) || 'fr' // Default to French
 
diff --git a/pages/index.tsx b/pages/index.tsx
index 88ba0a0..45f3e4a 100644
--- a/pages/index.tsx
+++ b/pages/index.tsx
@@ -137,12 +137,12 @@ function useHomeController(): {
   const handleUnlock = useUnlockHandler(loadArticleContent, setUnlockedArticles)
 
   // Get authors by category
-  const allAuthors = useMemo(() => {
+  const allAuthors = useMemo((): Article[] => {
     const authorsArray = Array.from(presentationArticles.values())
     return sortAuthors(authorsArray)
   }, [presentationArticles])
 
-  const authors = useMemo(() => {
+  const authors = useMemo((): Article[] => {
     return getAuthorsByCategory(presentationArticles, selectedCategory)
   }, [presentationArticles, selectedCategory])
 
diff --git a/pages/publish.tsx b/pages/publish.tsx
index 236437a..2b7a20d 100644
--- a/pages/publish.tsx
+++ b/pages/publish.tsx
@@ -6,7 +6,7 @@ import { useNostrAuth } from '@/hooks/useNostrAuth'
 import { getSeriesByAuthor } from '@/lib/seriesQueries'
 import { t } from '@/lib/i18n'
 
-function PublishHeader() {
+function PublishHeader(): React.ReactElement {
   return (
     <Head>
       <title>{t('publish.title')} - {t('home.title')}</title>
diff --git a/public/locales/en.txt b/public/locales/en.txt
index d582880..dfd0c0d 100644
--- a/public/locales/en.txt
+++ b/public/locales/en.txt
@@ -239,7 +239,7 @@ settings.keyManagement.recovery.done=Done
 settings.sync.title=Notes Synchronization
 settings.sync.start=Start Synchronization
 settings.sync.daysRange=From {{startDate}} to {{endDate}} ({{days}} days)
-settings.sync.progress=Day {{current}} of {{total}}
+settings.sync.progress=Step {{current}} of {{total}}
 settings.sync.completed=Everything is synchronized
 settings.nip95.title=NIP-95 Upload Endpoints
 settings.nip95.loading=Loading...
diff --git a/public/locales/fr.txt b/public/locales/fr.txt
index 0b27b6f..0460b73 100644
--- a/public/locales/fr.txt
+++ b/public/locales/fr.txt
@@ -239,7 +239,7 @@ settings.keyManagement.recovery.done=Terminé
 settings.sync.title=Synchronisation des notes
 settings.sync.start=Démarrer la synchronisation
 settings.sync.daysRange=Du {{startDate}} au {{endDate}} ({{days}} jours)
-settings.sync.progress=Jour {{current}} sur {{total}}
+settings.sync.progress=Étape {{current}} sur {{total}}
 settings.sync.completed=Tout est synchronisé
 settings.language.title=Langue de préférence
 settings.language.description=Choisissez votre langue préférée pour l'interface
diff --git a/types/nostr.ts b/types/nostr.ts
index 3e046e4..924055b 100644
--- a/types/nostr.ts
+++ b/types/nostr.ts
@@ -157,13 +157,6 @@ export interface ReviewTip {
   kindType?: KindType
 }
 
-export interface ZapRequest {
-  event: Event
-  amount: number
-  targetPubkey: string
-  targetEventId?: string
-}
-
 export interface NostrConnectState {
   connected: boolean
   pubkey: string | null