refactor: move routes under /tori/ prefix and add /api/obj mount

Routes now live at /tori/api, /ws/tori, and static files at /tori/.
Root / redirects to /tori/. Object storage mounted at /api/obj.
Dev proxy updated accordingly.

web/src/ws.ts

@@ -51,7 +51,8 @@ export type WsHandler = (msg: WsMessage) => void
 
 export function connectWs(projectId: string, onMessage: WsHandler): { close: () => void } {
   const proto = location.protocol === 'https:' ? 'wss:' : 'ws:'
-  const url = `${proto}//${location.host}/ws/${projectId}`
+  const wsBase = import.meta.env.BASE_URL.replace(/\/$/, '')
+  const url = `${proto}//${location.host}/ws${wsBase}/${projectId}`
   let ws: WebSocket | null = null
   let reconnectTimer: ReturnType<typeof setTimeout> | null = null
   let closed = false