fix(presi): resolve CORS issues and add strictPort to all web apps

- Add port 5180 to CORS_ORIGINS in .env.development
- Add port 5178 to Presi backend CORS config
- Fix Presi API client to use /api prefix
- Add strictPort: true to all web app vite configs to prevent port switching:
  - manacore: 5173
  - chat: 5174
  - picture: 5175
  - manadeck: 5176
  - zitare: 5177
  - presi: 5178
  - voxel-lava: 5180

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

games/voxel-lava/apps/web/vite.config.ts

@@ -3,4 +3,8 @@ import { defineConfig } from 'vite';
 
 export default defineConfig({
 	plugins: [sveltekit()],
+	server: {
+		port: 5180,
+		strictPort: true,
+	},
 });