Add tweet URL column and seen tracking system

astro-app/src/lib/csv-loader.ts

@@ -7,6 +7,7 @@ export interface TwitterProject {
   created_at: string;
   project_description: string;
   project_url: string | null;
+  original_tweet_url: string | null;
   media_type: string | null;
   media_thumbnail: string | null;
   media_original: string | null;

astro-app/src/lib/seen-projects.ts

@@ -0,0 +1,42 @@
+/**
+ * Utility functions for tracking seen projects using localStorage
+ */
+
+const SEEN_PROJECTS_KEY = 'twitter-projects-seen';
+
+export function getSeenProjects(): Set<string> {
+  if (typeof window === 'undefined') return new Set();
+  
+  try {
+    const stored = localStorage.getItem(SEEN_PROJECTS_KEY);
+    return stored ? new Set(JSON.parse(stored)) : new Set();
+  } catch {
+    return new Set();
+  }
+}
+
+export function markProjectAsSeen(projectId: string): void {
+  if (typeof window === 'undefined') return;
+  
+  const seenProjects = getSeenProjects();
+  seenProjects.add(projectId);
+  localStorage.setItem(SEEN_PROJECTS_KEY, JSON.stringify([...seenProjects]));
+}
+
+export function markProjectAsUnseen(projectId: string): void {
+  if (typeof window === 'undefined') return;
+  
+  const seenProjects = getSeenProjects();
+  seenProjects.delete(projectId);
+  localStorage.setItem(SEEN_PROJECTS_KEY, JSON.stringify([...seenProjects]));
+}
+
+export function isProjectSeen(projectId: string): boolean {
+  if (typeof window === 'undefined') return false;
+  return getSeenProjects().has(projectId);
+}
+
+export function clearAllSeenProjects(): void {
+  if (typeof window === 'undefined') return;
+  localStorage.removeItem(SEEN_PROJECTS_KEY);
+}