fix: deduplicate photos in gallery by filename, remove duplicate setState

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/app/admin/page.tsx

@@ -158,7 +158,6 @@ export default function AdminPage() {
     setRecipes(Array.isArray(recipesData) ? recipesData : [])
     setFamilyUploads(Array.isArray(uploadsData) ? uploadsData : [])
     setTimelineContributions(Array.isArray(contributionsData) ? contributionsData : [])
-    setTimelineContributions(Array.isArray(contributionsData) ? contributionsData : [])
   }, [])
 
   useEffect(() => {

src/app/page.tsx

@@ -154,8 +154,13 @@ export default async function HomePage() {
     )
   } catch {}
   
-  // Merge all photos
-  const allPhotos = [...photos, ...timelinePhotos, ...mediaContribPhotos]
+  // Merge all photos, deduplicate by filename
+  const seenFilenames = new Set<string>()
+  const allPhotos = [...photos, ...timelinePhotos, ...mediaContribPhotos].filter(p => {
+    if (seenFilenames.has(p.filename)) return false
+    seenFilenames.add(p.filename)
+    return true
+  })
   
   const recipes = plain<Recipe>(
     db.prepare('SELECT * FROM recipes ORDER BY sort_order, title').all()