📦 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/webpack/schemas/plugins/container/ContainerReferencePlugin.json

@@ -0,0 +1,132 @@
+{
+  "definitions": {
+    "ExternalsType": {
+      "description": "Specifies the default type of externals ('amd*', 'umd*', 'system' and 'jsonp' depend on output.libraryTarget set to the same value).",
+      "enum": [
+        "var",
+        "module",
+        "assign",
+        "this",
+        "window",
+        "self",
+        "global",
+        "commonjs",
+        "commonjs2",
+        "commonjs-module",
+        "commonjs-static",
+        "amd",
+        "amd-require",
+        "umd",
+        "umd2",
+        "jsonp",
+        "system",
+        "promise",
+        "import",
+        "module-import",
+        "script",
+        "node-commonjs",
+        "asset",
+        "css-import",
+        "css-url"
+      ]
+    },
+    "Remotes": {
+      "description": "Container locations and request scopes from which modules should be resolved and loaded at runtime. When provided, property name is used as request scope, otherwise request scope is automatically inferred from container location.",
+      "anyOf": [
+        {
+          "type": "array",
+          "items": {
+            "description": "Container locations and request scopes from which modules should be resolved and loaded at runtime.",
+            "anyOf": [
+              {
+                "$ref": "#/definitions/RemotesItem"
+              },
+              {
+                "$ref": "#/definitions/RemotesObject"
+              }
+            ]
+          }
+        },
+        {
+          "$ref": "#/definitions/RemotesObject"
+        }
+      ]
+    },
+    "RemotesConfig": {
+      "description": "Advanced configuration for container locations from which modules should be resolved and loaded at runtime.",
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "external": {
+          "description": "Container locations from which modules should be resolved and loaded at runtime.",
+          "anyOf": [
+            {
+              "$ref": "#/definitions/RemotesItem"
+            },
+            {
+              "$ref": "#/definitions/RemotesItems"
+            }
+          ]
+        },
+        "shareScope": {
+          "description": "The name of the share scope shared with this remote.",
+          "type": "string",
+          "minLength": 1
+        }
+      },
+      "required": ["external"]
+    },
+    "RemotesItem": {
+      "description": "Container location from which modules should be resolved and loaded at runtime.",
+      "type": "string",
+      "minLength": 1
+    },
+    "RemotesItems": {
+      "description": "Container locations from which modules should be resolved and loaded at runtime.",
+      "type": "array",
+      "items": {
+        "$ref": "#/definitions/RemotesItem"
+      }
+    },
+    "RemotesObject": {
+      "description": "Container locations from which modules should be resolved and loaded at runtime. Property names are used as request scopes.",
+      "type": "object",
+      "additionalProperties": {
+        "description": "Container locations from which modules should be resolved and loaded at runtime.",
+        "anyOf": [
+          {
+            "$ref": "#/definitions/RemotesConfig"
+          },
+          {
+            "$ref": "#/definitions/RemotesItem"
+          },
+          {
+            "$ref": "#/definitions/RemotesItems"
+          }
+        ]
+      }
+    }
+  },
+  "title": "ContainerReferencePluginOptions",
+  "type": "object",
+  "additionalProperties": false,
+  "properties": {
+    "remoteType": {
+      "description": "The external type of the remote containers.",
+      "oneOf": [
+        {
+          "$ref": "#/definitions/ExternalsType"
+        }
+      ]
+    },
+    "remotes": {
+      "$ref": "#/definitions/Remotes"
+    },
+    "shareScope": {
+      "description": "The name of the share scope shared with all remotes (defaults to 'default').",
+      "type": "string",
+      "minLength": 1
+    }
+  },
+  "required": ["remoteType", "remotes"]
+}