feat: unify sharing UI, redesign lists header, fix team sharing, and add user autocomplete

internal/domain/models.go

@@ -254,7 +254,10 @@ type DocumentBlock struct {
 type DocShare struct {
 	ID          string `json:"id"`
 	DocID       string `json:"docId"`
-	UserID      string `json:"userId"`
+	TargetType  string `json:"targetType,omitempty"` // user | team
+	TargetID    string `json:"targetId,omitempty"`
+	TargetName  string `json:"targetName,omitempty"`
+	UserID      string `json:"userId,omitempty"`
 	UserEmail   string `json:"userEmail,omitempty"`
 	DisplayName string `json:"displayName,omitempty"`
 	Permission  string `json:"permission"` // read | write
@@ -330,6 +333,17 @@ type SpaceMember struct {
 	JoinedAt    string `json:"joinedAt"`
 }
 
+type SpaceShare struct {
+	ID         string `json:"id"`
+	SpaceID    string `json:"spaceId"`
+	TargetType string `json:"targetType"` // team | user
+	TargetID   string `json:"targetId"`
+	TargetName string `json:"targetName,omitempty"`
+	Role       string `json:"role"` // editor | viewer
+	CreatedBy  string `json:"createdBy"`
+	CreatedAt  string `json:"createdAt"`
+}
+
 type Space struct {
 	ID          string        `json:"id"`
 	Name        string        `json:"name"`
@@ -339,6 +353,7 @@ type Space struct {
 	IsPersonal  bool          `json:"isPersonal"`
 	OwnerID     string        `json:"ownerId"`
 	Members     []SpaceMember `json:"members"`
+	Shares      []SpaceShare  `json:"shares,omitempty"`
 	ListsCount  int           `json:"listsCount"`
 	CreatedAt   string        `json:"createdAt"`
 }