chore: remove unreachable auth middleware and context package

internal/context/context.go

@@ -1,9 +0,0 @@
-package context
-
-// UserKey is the context key for storing the authenticated user.
-// It is unexported to prevent collisions.
-type key int
-
-const (
-	UserKey key = iota
-)

internal/middleware/auth.go

@@ -1,40 +0,0 @@
-package middleware
-
-import (
-	"context"
-	"net/http"
-
-	"mal/internal/domain"
-	ctxpkg "mal/internal/context"
-)
-
-// Auth middleware validates the session cookie and injects the user into context
-func Auth(authService domain.AuthService) func(http.Handler) http.Handler {
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			cookie, err := r.Cookie("session_id")
-			if err != nil {
-				next.ServeHTTP(w, r) // no cookie, proceed unauthenticated
-				return
-			}
-
-			user, err := authService.ValidateSession(r.Context(), cookie.Value)
-			if err != nil {
-				next.ServeHTTP(w, r) // invalid session, proceed unauthenticated
-				return
-			}
-
-			ctx := context.WithValue(r.Context(), ctxpkg.UserKey, user)
-			next.ServeHTTP(w, r.WithContext(ctx))
-		})
-	}
-}
-
-// GetUser retrieves the authenticated user from context, or nil if not authenticated
-func GetUser(ctx context.Context) *domain.User {
-	user, ok := ctx.Value(ctxpkg.UserKey).(*domain.User)
-	if !ok {
-		return nil
-	}
-	return user
-}