/*
 * state.js
 * All mutable application state — loaded first so every other module
 * can read and write these globals without forward-reference issues.
 *
 * Provides:
 *   S              — main UI state (tree data, selection, loading flags)
 *   _plugins       — plugin manifest populated from GET /api/config
 *   _batchState    — current batch-processing progress
 *   _batchPollTimer — setInterval handle for batch polling
 *   _bnd           — live boundary-canvas state (written by canvas-boundary.js,
 *                    read by detail-render.js)
 *   _photoQueue    — photo queue session state (written by photo.js,
 *                    read by events.js)
 */

// ── Main UI state ───────────────────────────────────────────────────────────
let S = {
  tree: null,
  expanded: new Set(),
  selected: null,          // {type:'cabinet'|'shelf'|'book', id}
  _photoTarget: null,      // {type, id}
  _loading: {},            // {`${pluginId}:${entityId}`: true}
  _cropMode: null,         // {type, id} while crop UI is active
};

// ── Plugin registry ─────────────────────────────────────────────────────────
let _plugins = [];  // populated from GET /api/config

// ── Batch processing state ──────────────────────────────────────────────────
let _batchState = {running: false, total: 0, done: 0, errors: 0, current: ''};
let _batchPollTimer = null;

// ── Boundary canvas live state ───────────────────────────────────────────────
// Owned by canvas-boundary.js; declared here so detail-render.js can read it
// without a circular load dependency.
let _bnd = null; // {wrap,img,canvas,axis,boundaries[],pluginResults{},selectedPlugin,segments[],nodeId,nodeType}

// ── Photo queue session state ────────────────────────────────────────────────
// Owned by photo.js; declared here so events.js can read/write it.
let _photoQueue = null; // {books:[...], index:0, processing:false}