refactor: 彻底移除 .env 依赖，配置统一由 config.yaml + 环境变量驱动

backend/go.mod

@@ -27,7 +27,6 @@ require (
 	github.com/go-playground/validator/v10 v10.20.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
-	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect

backend/go.sum

@@ -44,8 +44,6 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
-github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=

backend/internal/config/config.go

@@ -5,7 +5,6 @@ import (
 	"os"
 	"strings"
 
-	"github.com/joho/godotenv"
 	"github.com/spf13/viper"
 )
 
@@ -161,12 +160,6 @@ func Load() (*Config, error) {
 		_ = v.MergeInConfig()
 	}
 
-	// 加载 .env 文件（不覆盖已有环境变量）
-	// 按优先级尝试：当前目录、上级目录（兼容从 backend/ 或项目根目录启动）
-	_ = godotenv.Load()
-	_ = godotenv.Load("../.env")
-	_ = godotenv.Load("../../.env") // 兼容从 backend/cmd/server/ 启动
-
 	// 环境变量覆盖
 	v.SetEnvPrefix("CAMTALK")
 	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))

deploy.sh

@@ -14,21 +14,6 @@ info()  { echo -e "${GREEN}[INFO]${NC} $*"; }
 warn()  { echo -e "${YELLOW}[WARN]${NC} $*"; }
 error() { echo -e "${RED}[ERROR]${NC} $*" >&2; }
 
-# 确保 .env 存在
-ensure_env() {
-  if [ ! -f .env ]; then
-    if [ -f .env.example ]; then
-      warn ".env 文件不存在，从 .env.example 复制模板"
-      cp .env.example .env
-      warn "请编辑 .env 填入实际的 API Key，然后重新运行"
-      exit 1
-    else
-      error ".env.example 也不存在，请手动创建 .env"
-      exit 1
-    fi
-  fi
-}
-
 cmd_build() {
   info "构建 Docker 镜像..."
   docker compose build
@@ -36,7 +21,6 @@ cmd_build() {
 }
 
 cmd_up() {
-  ensure_env
   info "启动服务..."
   docker compose up -d
   info "服务已启动"

docker-compose.yml

@@ -17,8 +17,6 @@ services:
       context: ./backend
       dockerfile: Dockerfile
     container_name: camtalk-backend
-    env_file:
-      - .env
     environment:
       - APP_ENV=production
     networks: