Phase 6 — NPC tracker

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

server/index.js

@@ -23,7 +23,7 @@ app.get('/health', (req, res) => {
 app.use('/api/campaigns', campaignsRouter);
 app.use('/api/characters', charactersRouter);
 app.use('/api/campaigns/:campaignId/threads', threadsRouter);
-app.use('/api/npcs', npcsRouter);
+app.use('/api/campaigns/:campaignId/npcs', npcsRouter);
 app.use('/api/notes', notesRouter);
 app.use('/api/tables', tablesRouter);
 app.use('/api/systems', systemsRouter);