📦 添加虚拟环境和启动脚本

新增:
- backend/venv/ - Python 虚拟环境
- backend/start.sh - 启动脚本（使用虚拟环境）
- backend/requirements.txt - 依赖列表
- .gitignore - 忽略虚拟环境和缓存文件

说明:
- 每个项目使用独立虚拟环境
- 避免依赖冲突
- 启动脚本自动创建和激活虚拟环境

frontend/node_modules/core-js-pure/full/map/delete-all.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.delete-all');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'deleteAll');

frontend/node_modules/core-js-pure/full/map/emplace.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.emplace');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'emplace');

frontend/node_modules/core-js-pure/full/map/every.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.every');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'every');

frontend/node_modules/core-js-pure/full/map/filter.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.filter');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'filter');

frontend/node_modules/core-js-pure/full/map/find-key.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.find-key');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'findKey');

frontend/node_modules/core-js-pure/full/map/find.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.find');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'find');

frontend/node_modules/core-js-pure/full/map/from.js

@@ -0,0 +1,26 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.array.iterator');
+require('../../modules/es.map');
+require('../../modules/es.string.iterator');
+require('../../modules/esnext.map.from');
+require('../../modules/esnext.map.delete-all');
+require('../../modules/esnext.map.emplace');
+require('../../modules/esnext.map.every');
+require('../../modules/esnext.map.filter');
+require('../../modules/esnext.map.find');
+require('../../modules/esnext.map.find-key');
+require('../../modules/esnext.map.get-or-insert');
+require('../../modules/esnext.map.get-or-insert-computed');
+require('../../modules/esnext.map.includes');
+require('../../modules/esnext.map.key-of');
+require('../../modules/esnext.map.map-keys');
+require('../../modules/esnext.map.map-values');
+require('../../modules/esnext.map.merge');
+require('../../modules/esnext.map.reduce');
+require('../../modules/esnext.map.some');
+require('../../modules/esnext.map.update');
+require('../../modules/web.dom-collections.iterator');
+var path = require('../../internals/path');
+
+module.exports = path.Map.from;

frontend/node_modules/core-js-pure/full/map/get-or-insert-computed.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../actual/map/get-or-insert-computed');
+
+module.exports = parent;

frontend/node_modules/core-js-pure/full/map/get-or-insert.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../actual/map/get-or-insert');
+
+module.exports = parent;

frontend/node_modules/core-js-pure/full/map/group-by.js

@@ -0,0 +1,20 @@
+'use strict';
+var parent = require('../../actual/map/group-by');
+require('../../modules/esnext.map.delete-all');
+require('../../modules/esnext.map.emplace');
+require('../../modules/esnext.map.every');
+require('../../modules/esnext.map.filter');
+require('../../modules/esnext.map.find');
+require('../../modules/esnext.map.find-key');
+require('../../modules/esnext.map.get-or-insert');
+require('../../modules/esnext.map.get-or-insert-computed');
+require('../../modules/esnext.map.includes');
+require('../../modules/esnext.map.key-of');
+require('../../modules/esnext.map.map-keys');
+require('../../modules/esnext.map.map-values');
+require('../../modules/esnext.map.merge');
+require('../../modules/esnext.map.reduce');
+require('../../modules/esnext.map.some');
+require('../../modules/esnext.map.update');
+
+module.exports = parent;

frontend/node_modules/core-js-pure/full/map/includes.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.includes');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'includes');

frontend/node_modules/core-js-pure/full/map/index.js

@@ -0,0 +1,27 @@
+'use strict';
+var parent = require('../../actual/map');
+require('../../modules/esnext.map.from');
+require('../../modules/esnext.map.of');
+require('../../modules/esnext.map.key-by');
+require('../../modules/esnext.map.delete-all');
+require('../../modules/esnext.map.emplace');
+require('../../modules/esnext.map.every');
+require('../../modules/esnext.map.filter');
+require('../../modules/esnext.map.find');
+require('../../modules/esnext.map.find-key');
+require('../../modules/esnext.map.includes');
+require('../../modules/esnext.map.get-or-insert');
+require('../../modules/esnext.map.get-or-insert-computed');
+require('../../modules/esnext.map.key-of');
+require('../../modules/esnext.map.map-keys');
+require('../../modules/esnext.map.map-values');
+require('../../modules/esnext.map.merge');
+require('../../modules/esnext.map.reduce');
+require('../../modules/esnext.map.some');
+require('../../modules/esnext.map.update');
+// TODO: remove from `core-js@4`
+require('../../modules/esnext.map.upsert');
+// TODO: remove from `core-js@4`
+require('../../modules/esnext.map.update-or-insert');
+
+module.exports = parent;

frontend/node_modules/core-js-pure/full/map/key-by.js

@@ -0,0 +1,30 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.map');
+require('../../modules/esnext.map.key-by');
+require('../../modules/esnext.map.delete-all');
+require('../../modules/esnext.map.emplace');
+require('../../modules/esnext.map.every');
+require('../../modules/esnext.map.filter');
+require('../../modules/esnext.map.find');
+require('../../modules/esnext.map.find-key');
+require('../../modules/esnext.map.get-or-insert');
+require('../../modules/esnext.map.get-or-insert-computed');
+require('../../modules/esnext.map.includes');
+require('../../modules/esnext.map.key-of');
+require('../../modules/esnext.map.map-keys');
+require('../../modules/esnext.map.map-values');
+require('../../modules/esnext.map.merge');
+require('../../modules/esnext.map.reduce');
+require('../../modules/esnext.map.some');
+require('../../modules/esnext.map.update');
+var call = require('../../internals/function-call');
+var isCallable = require('../../internals/is-callable');
+var path = require('../../internals/path');
+
+var Map = path.Map;
+var mapKeyBy = Map.keyBy;
+
+module.exports = function keyBy(source, iterable, keyDerivative) {
+  return call(mapKeyBy, isCallable(this) ? this : Map, source, iterable, keyDerivative);
+};

frontend/node_modules/core-js-pure/full/map/key-of.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.key-of');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'keyOf');

frontend/node_modules/core-js-pure/full/map/map-keys.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.map-keys');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'mapKeys');

frontend/node_modules/core-js-pure/full/map/map-values.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.map-values');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'mapValues');

frontend/node_modules/core-js-pure/full/map/merge.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.merge');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'merge');

frontend/node_modules/core-js-pure/full/map/of.js

@@ -0,0 +1,24 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.array.iterator');
+require('../../modules/es.map');
+require('../../modules/esnext.map.of');
+require('../../modules/esnext.map.delete-all');
+require('../../modules/esnext.map.emplace');
+require('../../modules/esnext.map.every');
+require('../../modules/esnext.map.filter');
+require('../../modules/esnext.map.find');
+require('../../modules/esnext.map.find-key');
+require('../../modules/esnext.map.get-or-insert');
+require('../../modules/esnext.map.get-or-insert-computed');
+require('../../modules/esnext.map.includes');
+require('../../modules/esnext.map.key-of');
+require('../../modules/esnext.map.map-keys');
+require('../../modules/esnext.map.map-values');
+require('../../modules/esnext.map.merge');
+require('../../modules/esnext.map.reduce');
+require('../../modules/esnext.map.some');
+require('../../modules/esnext.map.update');
+var path = require('../../internals/path');
+
+module.exports = path.Map.of;

frontend/node_modules/core-js-pure/full/map/reduce.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.reduce');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'reduce');

frontend/node_modules/core-js-pure/full/map/some.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.some');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'some');

frontend/node_modules/core-js-pure/full/map/update-or-insert.js

@@ -0,0 +1,7 @@
+'use strict';
+// TODO: remove from `core-js@4`
+require('../../modules/es.map');
+require('../../modules/esnext.map.update-or-insert');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'updateOrInsert');

frontend/node_modules/core-js-pure/full/map/update.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.update');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'update');

frontend/node_modules/core-js-pure/full/map/upsert.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.upsert');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Map', 'upsert');