build share count

backend/src/db.ts

@@ -66,6 +66,10 @@ if (!memesCols.find((c) => c.name === 'ocr_text')) {
   db.exec('ALTER TABLE memes ADD COLUMN ocr_text TEXT');
 }
 
+if (!memesCols.find((c) => c.name === 'share_count')) {
+  db.exec('ALTER TABLE memes ADD COLUMN share_count INTEGER NOT NULL DEFAULT 0');
+}
+
 // Indexes that depend on migrated columns — created after columns are guaranteed to exist
 db.exec(`
   CREATE INDEX IF NOT EXISTS idx_memes_collection_id ON memes(collection_id);

backend/src/routes/memes.ts

@@ -214,6 +214,14 @@ export async function memesRoutes(app: FastifyInstance) {
     }
   );
 
+  // Record a share — no auth required, public action
+  app.post<{ Params: { id: string } }>('/api/memes/:id/share', async (req, reply) => {
+    const meme = getMemeById(req.params.id);
+    if (!meme) return reply.status(404).send({ error: 'Not found' });
+    db.prepare('UPDATE memes SET share_count = share_count + 1 WHERE id = ?').run(meme.id);
+    return { share_count: (meme.share_count ?? 0) + 1 };
+  });
+
   // Delete meme (children cascade)
   app.delete<{ Params: { id: string } }>(
     '/api/memes/:id',

backend/src/types.ts

@@ -11,6 +11,7 @@ export interface Meme {
   parent_id: string | null;
   collection_id: number | null;
   ocr_text: string | null;
+  share_count: number;
   created_at: string;
   tags: string[];
 }