chore: 基线提交（重构前代码快照）

- git 初始化 + .gitignore 补全（根 .env / logs / instance / __pycache__ 等）
- 修复 utils/.gitignore 误将整个 utils/ 源码层忽略的问题，补入全部工具源码（含 ip2region.xdb）
- 含后端全部代码：application / extensions / utils / config / migrations
- 含前端 ui/（后续整体迁走）
- 不含根 .env（含密钥，本地保留）

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

ui/.eslintrc.js

@@ -0,0 +1,74 @@
+module.exports = {
+  root: true,
+  env: {
+    browser: true,
+    node: true,
+    es6: true,
+  },
+  parser: 'vue-eslint-parser',
+  parserOptions: {
+    parser: '@typescript-eslint/parser',
+    ecmaVersion: 2020,
+    sourceType: 'module',
+    jsxPragma: 'React',
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+  extends: [
+    'plugin:vue/vue3-recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:prettier/recommended',
+  ],
+  rules: {
+    'vue/script-setup-uses-vars': 'error',
+    '@typescript-eslint/ban-ts-ignore': 'off',
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+    '@typescript-eslint/no-var-requires': 'off',
+    '@typescript-eslint/no-empty-function': 'off',
+    'vue/custom-event-name-casing': 'off',
+    'no-use-before-define': 'off',
+    '@typescript-eslint/no-use-before-define': 'off',
+    '@typescript-eslint/ban-ts-comment': 'off',
+    '@typescript-eslint/ban-types': 'off',
+    '@typescript-eslint/no-non-null-assertion': 'off',
+    '@typescript-eslint/explicit-module-boundary-types': 'off',
+    '@typescript-eslint/no-unused-vars': [
+      'error',
+      {
+        argsIgnorePattern: '^_',
+        varsIgnorePattern: '^_',
+      },
+    ],
+    'no-unused-vars': [
+      'error',
+      {
+        argsIgnorePattern: '^_',
+        varsIgnorePattern: '^_',
+      },
+    ],
+    'space-before-function-paren': 'off',
+    'vue/multi-word-component-names': 'off',
+    'vue/attributes-order': 'off',
+    'vue/one-component-per-file': 'off',
+    'vue/html-closing-bracket-newline': 'off',
+    'vue/max-attributes-per-line': 'off',
+    'vue/multiline-html-element-content-newline': 'off',
+    'vue/singleline-html-element-content-newline': 'off',
+    'vue/attribute-hyphenation': 'off',
+    'vue/require-default-prop': 'off',
+    'vue/html-self-closing': [
+      'error',
+      {
+        html: {
+          void: 'always',
+          normal: 'never',
+          component: 'always',
+        },
+        svg: 'always',
+        math: 'always',
+      },
+    ],
+  },
+};