feat: 引入依赖注入模式

- 创建Repository接口定义（UserRepository、ProfileRepository、TextureRepository等）
- 创建Repository接口实现
- 创建依赖注入容器（container.Container）
- 改造Handler层使用依赖注入（AuthHandler、UserHandler、TextureHandler）
- 创建新的路由注册方式（RegisterRoutesWithDI）
- 提供main.go示例文件展示如何使用依赖注入

同时包含之前的安全修复：
- CORS配置安全加固
- 头像URL验证安全修复
- JWT algorithm confusion漏洞修复
- Recovery中间件增强
- 敏感错误信息泄露修复
- 类型断言安全修复

.gitea/workflows/docker.yml

@@ -1,84 +0,0 @@
-name: Build and Push Docker Image
-
-on:
-  push:
-    branches:
-      - main
-      - master
-      - dev
-    tags:
-      - 'v*'
-  workflow_dispatch:
-
-env:
-  REGISTRY: code.littlelan.cn
-  IMAGE_NAME: carrotskin/backend
-
-jobs:
-  build-and-push:
-    runs-on: ubuntu-latest
-    container:
-      image: quay.io/buildah/stable:latest
-      options: --privileged
-    
-    steps:
-      - name: Install dependencies
-        run: |
-          dnf install -y git nodejs
-
-      - name: Checkout code
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Login to registry
-        run: |
-          buildah login \
-            -u "${{ secrets.REGISTRY_USERNAME }}" \
-            -p "${{ secrets.REGISTRY_PASSWORD }}" \
-            ${{ env.REGISTRY }}
-          echo "Registry 登录成功"
-
-      - name: Build image
-        run: |
-          buildah bud \
-            --format docker \
-            --layers \
-            -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:build \
-            -f Dockerfile \
-            .
-          echo "镜像构建完成"
-
-      - name: Tag and push image
-        run: |
-          SHORT_SHA=$(echo "${{ github.sha }}" | cut -c1-7)
-          REF_NAME="${{ github.ref_name }}"
-          REF="${{ github.ref }}"
-          
-          # 推送分支/标签名
-          buildah tag ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:build \
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${REF_NAME}
-          buildah push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${REF_NAME}
-          echo "✓ 推送: ${REF_NAME}"
-          
-          # 推送 SHA 标签
-          buildah tag ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:build \
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:sha-${SHORT_SHA}
-          buildah push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:sha-${SHORT_SHA}
-          echo "✓ 推送: sha-${SHORT_SHA}"
-          
-          # main/master 推送 latest
-          if [ "$REF" = "refs/heads/main" ] || [ "$REF" = "refs/heads/master" ]; then
-            buildah tag ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:build \
-              ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
-            buildah push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
-            echo "✓ 推送: latest"
-          fi
-
-      - name: Build summary
-        run: |
-          echo "=============================="
-          echo "✅ 镜像构建完成!"
-          echo "仓库: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
-          echo "分支: ${{ github.ref_name }}"
-          echo "=============================="