Git LFS section is live with:

Enable LFS toggle — turns LFS on/off for the repo; all other controls dim when disabled
File locking toggle — enables the LFS locking protocol for binary assets
Maximum file size — optional per-file size cap in MB (blank = unlimited)
Info callout linking to the git-lfs client install page and noting the .gitattributes requirement

internal/models/lfs.go

@@ -0,0 +1,9 @@
+package models
+
+type RepoLFSSettings struct {
+	ID             int64 `xorm:"'id' pk autoincr"`
+	RepoID         int64 `xorm:"'repo_id' notnull unique"`
+	Enabled        bool  `xorm:"'enabled' default false"`
+	LockingEnabled bool  `xorm:"'locking_enabled' default true"`
+	MaxFileSizeMB  int64 `xorm:"'max_file_size_mb' default 0"` // 0 = unlimited
+}