chore: rename user role (#108)

* chore: rename user role to `host`

* chore: related frontend changes

* chore: fix migration file

* chore: use tricky sql

api/system.go

@@ -3,6 +3,6 @@ package api
 import "github.com/usememos/memos/server/profile"
 
 type SystemStatus struct {
-	Owner   *User            `json:"owner"`
+	Host    *User            `json:"host"`
 	Profile *profile.Profile `json:"profile"`
 }

api/user.go

@@ -4,16 +4,16 @@ package api
 type Role string
 
 const (
-	// Owner is the OWNER role.
-	Owner Role = "OWNER"
+	// Host is the HOST role.
+	Host Role = "HOST"
 	// NormalUser is the USER role.
 	NormalUser Role = "USER"
 )
 
 func (e Role) String() string {
 	switch e {
-	case Owner:
-		return "OWNER"
+	case Host:
+		return "HOST"
 	case NormalUser:
 		return "USER"
 	}