diff --git a/components/ReviewTipForm.tsx b/components/ReviewTipForm.tsx
index b66e8e8..8bea3d2 100644
--- a/components/ReviewTipForm.tsx
+++ b/components/ReviewTipForm.tsx
@@ -40,7 +40,14 @@ export function ReviewTipForm({ review, article, onSuccess, onCancel }: ReviewTi
       const split = calculateReviewSplit()
 
       // Build zap request tags
-      const category = article.category === 'author-presentation' ? undefined : (article.category === 'science-fiction' || article.category === 'scientific-research' ? article.category : undefined)
+      let category: 'science-fiction' | 'scientific-research' | undefined
+      if (article.category === 'author-presentation') {
+        category = undefined
+      } else if (article.category === 'science-fiction' || article.category === 'scientific-research') {
+        category = article.category
+      } else {
+        category = undefined
+      }
       const zapRequestTags = buildReviewTipZapRequestTags({
         articleId: article.id,
         reviewId: review.id,
diff --git a/lib/articleMutations.ts b/lib/articleMutations.ts
index 75f6655..5d426d8 100644
--- a/lib/articleMutations.ts
+++ b/lib/articleMutations.ts
@@ -44,7 +44,14 @@ async function buildParsedArticleFromDraft(
   invoice: AlbyInvoice,
   authorPubkey: string
 ): Promise<{ article: Article; hash: string; version: number; index: number }> {
-  const category = draft.category === 'science-fiction' ? 'sciencefiction' : draft.category === 'scientific-research' ? 'research' : 'sciencefiction'
+  let category: string
+  if (draft.category === 'science-fiction') {
+    category = 'sciencefiction'
+  } else if (draft.category === 'scientific-research') {
+    category = 'research'
+  } else {
+    category = 'sciencefiction'
+  }
 
   const hashId = await generatePublicationHashId({
     pubkey: authorPubkey,
@@ -103,16 +110,12 @@ async function publishPreviewWithInvoice(
   let index: number
 
   if (customArticle) {
+    ;({ hash, version } = customArticle)
     article = customArticle
-    hash = customArticle.hash
-    version = customArticle.version
     index = customArticle.index ?? 0
   } else {
     const built = await buildParsedArticleFromDraft(draft, invoice, authorPubkey)
-    article = built.article
-    hash = built.hash
-    version = built.version
-    index = built.index
+    ;({ article, hash, version, index } = built)
   }
 
   // Build event template
diff --git a/lib/articlePublisherHelpersPresentation.ts b/lib/articlePublisherHelpersPresentation.ts
index 2ff0eb0..b5d3a2b 100644
--- a/lib/articlePublisherHelpersPresentation.ts
+++ b/lib/articlePublisherHelpersPresentation.ts
@@ -166,7 +166,14 @@ export async function parsePresentationEvent(event: Event): Promise<import('@/ty
   }
 
   // Map tag category to article category
-  const articleCategory = tags.category === 'sciencefiction' ? 'science-fiction' : tags.category === 'research' ? 'scientific-research' : undefined
+  let articleCategory: 'science-fiction' | 'scientific-research' | undefined
+  if (tags.category === 'sciencefiction') {
+    articleCategory = 'science-fiction'
+  } else if (tags.category === 'research') {
+    articleCategory = 'scientific-research'
+  } else {
+    articleCategory = undefined
+  }
 
   // Extract hash, version, index from id tag or parse it
   let hash: string
@@ -176,7 +183,7 @@ export async function parsePresentationEvent(event: Event): Promise<import('@/ty
   if (tags.id) {
     const parsed = parseObjectId(tags.id)
     if (parsed.hash) {
-      hash = parsed.hash
+      ;({ hash } = parsed)
       version = parsed.version ?? version
       index = parsed.index ?? index
     } else {
@@ -219,7 +226,15 @@ export async function parsePresentationEvent(event: Event): Promise<import('@/ty
         .join('\n')
         .trim()
     })(), // Required field
-    thumbnailUrl: (typeof profileData?.pictureUrl === 'string' ? profileData.pictureUrl : typeof tags.pictureUrl === 'string' ? tags.pictureUrl : ''), // Required field
+    thumbnailUrl: ((): string => {
+      if (typeof profileData?.pictureUrl === 'string') {
+        return profileData.pictureUrl
+      }
+      if (typeof tags.pictureUrl === 'string') {
+        return tags.pictureUrl
+      }
+      return ''
+    })(), // Required field
     createdAt: event.created_at,
     zapAmount: 0,
     paid: true,
diff --git a/lib/articlePublisherPublish.ts b/lib/articlePublisherPublish.ts
index ecaa737..683e7c3 100644
--- a/lib/articlePublisherPublish.ts
+++ b/lib/articlePublisherPublish.ts
@@ -26,7 +26,14 @@ async function buildParsedArticleFromDraft(
   invoice: AlbyInvoice,
   authorPubkey: string
 ): Promise<{ article: Article; hash: string; version: number; index: number }> {
-  const category = draft.category === 'science-fiction' ? 'sciencefiction' : draft.category === 'scientific-research' ? 'research' : 'sciencefiction'
+  let category: string
+  if (draft.category === 'science-fiction') {
+    category = 'sciencefiction'
+  } else if (draft.category === 'scientific-research') {
+    category = 'research'
+  } else {
+    category = 'sciencefiction'
+  }
 
   const hashId = await generatePublicationHashId({
     pubkey: authorPubkey,
diff --git a/lib/nostrEventParsing.ts b/lib/nostrEventParsing.ts
index 75abbe7..7c3dc44 100644
--- a/lib/nostrEventParsing.ts
+++ b/lib/nostrEventParsing.ts
@@ -174,7 +174,14 @@ function getPreviewContent(content: string, previewTag?: string): { previewConte
 
 async function buildArticle(event: Event, tags: ReturnType<typeof extractTagsFromEvent>, preview: string): Promise<Article> {
   // Map category from new system to old system
-  const category = tags.category === 'sciencefiction' ? 'science-fiction' : tags.category === 'research' ? 'scientific-research' : undefined
+  let category: 'science-fiction' | 'scientific-research' | undefined
+  if (tags.category === 'sciencefiction') {
+    category = 'science-fiction'
+  } else if (tags.category === 'research') {
+    category = 'scientific-research'
+  } else {
+    category = undefined
+  }
   const isPresentation = tags.type === 'author'
 
   // Extract hash, version, index from id tag or parse it
@@ -185,7 +192,7 @@ async function buildArticle(event: Event, tags: ReturnType<typeof extractTagsFro
   if (tags.id) {
     const parsed = parseObjectId(tags.id)
     if (parsed.hash) {
-      hash = parsed.hash
+      ;({ hash } = parsed)
       version = parsed.version ?? version
       index = parsed.index ?? index
     } else {
@@ -219,7 +226,7 @@ async function buildArticle(event: Event, tags: ReturnType<typeof extractTagsFro
         pages = metadataPages
       }
     }
-  } catch (e) {
+  } catch (_e) {
     // Ignore JSON parsing errors
   }
 
@@ -237,7 +244,15 @@ async function buildArticle(event: Event, tags: ReturnType<typeof extractTagsFro
     createdAt: event.created_at,
     zapAmount: tags.zapAmount ?? 800,
     paid: false,
-    thumbnailUrl: typeof tags.bannerUrl === 'string' ? tags.bannerUrl : typeof tags.pictureUrl === 'string' ? tags.pictureUrl : '', // Required field with default
+    thumbnailUrl: ((): string => {
+      if (typeof tags.bannerUrl === 'string') {
+        return tags.bannerUrl
+      }
+      if (typeof tags.pictureUrl === 'string') {
+        return tags.pictureUrl
+      }
+      return ''
+    })(), // Required field with default
     ...(tags.invoice ? { invoice: tags.invoice } : {}),
     ...(tags.paymentHash ? { paymentHash: tags.paymentHash } : {}),
     ...(category ? { category } : {}),
diff --git a/lib/publishWorker.ts b/lib/publishWorker.ts
index b939586..04bce0a 100644
--- a/lib/publishWorker.ts
+++ b/lib/publishWorker.ts
@@ -83,7 +83,7 @@ class PublishWorkerService {
         if (isReady) {
           await swClient.stopPublishWorker()
         }
-      } catch (error) {
+      } catch (_error) {
         // Ignore errors
       }
     }