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/commitlint.config.js

@@ -0,0 +1,57 @@
+module.exports = {
+  ignores: [(commit) => commit.includes('init')],
+  extends: ['@commitlint/config-conventional'],
+  parserPreset: {
+    parserOpts: {
+      headerPattern: /^(\w*|[\u4e00-\u9fa5]*)(?:[\(\（](.*)[\)\）])?[\:\：] (.*)/,
+      headerCorrespondence: ['type', 'scope', 'subject'],
+      referenceActions: [
+        'close',
+        'closes',
+        'closed',
+        'fix',
+        'fixes',
+        'fixed',
+        'resolve',
+        'resolves',
+        'resolved'
+      ],
+      issuePrefixes: ['#'],
+      noteKeywords: ['BREAKING CHANGE'],
+      fieldPattern: /^-(.*?)-$/,
+      revertPattern: /^Revert\s"([\s\S]*)"\s*This reverts commit (\w*)\./,
+      revertCorrespondence: ['header', 'hash'],
+      warn() {},
+      mergePattern: null,
+      mergeCorrespondence: null
+    }
+  },
+  rules: {
+    'body-leading-blank': [2, 'always'],
+    'footer-leading-blank': [1, 'always'],
+    'header-max-length': [2, 'always', 108],
+    'subject-empty': [2, 'never'],
+    'type-empty': [2, 'never'],
+    'type-enum': [
+      2,
+      'always',
+      [
+        'feat',
+        'fix',
+        'perf',
+        'style',
+        'docs',
+        'test',
+        'refactor',
+        'build',
+        'ci',
+        'chore',
+        'revert',
+        'wip',
+        'workflow',
+        'types',
+        'release'
+      ]
+    ]
+  }
+}