chore(sync): 上游同步 - 合并 upstream/main 至 ee6b3446，按新 module 路径收敛冲突

backend/cmd/migrate-sqlite-postgres/fork_env.go

@@ -0,0 +1,8 @@
+// 本项目附加文件（fork 专属）：不改上游 main.go，仅让该命令启动时读取仓库根 .env。
+package main
+
+import "yingce/backend/internal/config"
+
+func init() {
+	config.LoadDotEnv()
+}

backend/cmd/migrate-sqlite-postgres/main.go

@@ -13,9 +13,8 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"infinite-canvas/backend/internal/config"
-	"infinite-canvas/backend/internal/database"
-	"infinite-canvas/backend/internal/model"
+	"yingce/backend/internal/database"
+	"yingce/backend/internal/model"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/logger"
@@ -28,7 +27,6 @@ type tableMigration struct {
 }
 
 func main() {
-	config.LoadDotEnv()
 	sourcePath := strings.TrimSpace(os.Getenv("SQLITE_SOURCE_PATH"))
 	targetDSN := strings.TrimSpace(os.Getenv("DATABASE_URL"))
 	if sourcePath == "" || targetDSN == "" {

backend/cmd/migrate-sqlite-postgres/main_test.go

@@ -4,8 +4,8 @@ import (
 	"sync"
 	"testing"
 
-	"infinite-canvas/backend/internal/database"
-	"infinite-canvas/backend/internal/model"
+	"yingce/backend/internal/database"
+	"yingce/backend/internal/model"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/schema"