feat: 系统优化 - ESLint、Tailwind、前端健壮性、后端工程化、运维可观测性

- 前端: ESLint+Prettier配置、Tailwind v4配置、ErrorBoundary、全局AuthLoader优化、ReactQuery分层
- 后端: MinIO凭证移除、Docker统一为govai品牌、zerolog日志封装、错误码枚举、文件上传校验、单元测试(13项全通过)
- 运维: 健康检查增强(PG/Redis ping)、Prometheus指标(/metrics端点)、多租户tenant包、RateLimit nil防御
- 移动: citation_prompt.txt → internal/assets/

server/internal/handler/health.go

@@ -6,15 +6,80 @@ import (
 	"time"
 
 	"github.com/enterprise-ai-platform/server/internal/response"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/redis/go-redis/v9"
 )
 
-var startTime = time.Now()
+type HealthHandler struct {
+	pool *pgxpool.Pool
+	rdb  *redis.Client
+}
 
-func HealthCheck(w http.ResponseWriter, r *http.Request) {
-	response.JSON(w, http.StatusOK, map[string]any{
-		"status":  "ok",
-		"service": "aily-portal-api",
+func NewHealthHandler(pool *pgxpool.Pool, rdb *redis.Client) *HealthHandler {
+	return &HealthHandler{pool: pool, rdb: rdb}
+}
+
+func (h *HealthHandler) HealthCheck(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	type dep struct {
+		Name   string `json:"name"`
+		Status string `json:"status"`
+		Error  string `json:"error,omitempty"`
+	}
+	deps := []dep{}
+
+	// PostgreSQL
+	if h.pool != nil {
+		if err := h.pool.Ping(ctx); err != nil {
+			deps = append(deps, dep{Name: "postgres", Status: "down", Error: err.Error()})
+		} else {
+			deps = append(deps, dep{Name: "postgres", Status: "up"})
+		}
+	} else {
+		deps = append(deps, dep{Name: "postgres", Status: "not_configured"})
+	}
+
+	// Redis
+	if h.rdb != nil {
+		if err := h.rdb.Ping(ctx).Err(); err != nil {
+			deps = append(deps, dep{Name: "redis", Status: "down", Error: err.Error()})
+		} else {
+			deps = append(deps, dep{Name: "redis", Status: "up"})
+		}
+	} else {
+		deps = append(deps, dep{Name: "redis", Status: "not_configured"})
+	}
+
+	// Overall status
+	status := "ok"
+	httpStatus := http.StatusOK
+	for _, d := range deps {
+		if d.Status == "down" {
+			status = "degraded"
+			httpStatus = http.StatusServiceUnavailable
+			break
+		}
+	}
+
+	// Runtime stats
+	var m runtime.MemStats
+	runtime.ReadMemStats(&m)
+
+	response.JSON(w, httpStatus, map[string]any{
+		"status":  status,
+		"service": "govai-portal-api",
 		"uptime":  time.Since(startTime).String(),
 		"go":      runtime.Version(),
+		"memory": map[string]any{
+			" Alloc":   m.Alloc / 1024 / 1024,
+			"Sys":     m.Sys / 1024 / 1024,
+			"NumGC":   m.NumGC,
+			"Goroutine": runtime.NumGoroutine(),
+		},
+		"dependencies": deps,
 	})
 }
+
+// startTime is shared with the original health.go init block.
+var startTime = time.Now()