fix: migrate remaining models to BaseModel (lowercase id JSON)

backend/internal/database/models/access_token.go

@@ -1,15 +1,10 @@
 package models
 
-import (
-	"time"
+import "time"
 
-	"gorm.io/gorm"
-)
-
-// AccessToken grants a client access to one Listener's generated node
-// configuration. Listener is the single source of truth for client exports.
+// AccessToken grants a client access to one Listener's generated node configuration.
 type AccessToken struct {
-	gorm.Model
+	BaseModel
 	Name       string     `gorm:"not null" json:"name"`
 	Token      string     `gorm:"uniqueIndex;not null" json:"-"`
 	Enabled    bool       `gorm:"default:true" json:"enabled"`

backend/internal/database/models/listener_user.go

@@ -1,17 +1,13 @@
 package models
 
-import "gorm.io/gorm"
-
 // ListenerUser is the explicit many-to-many join between ProxyUser and Listener.
-// Username/Password are retained for database compatibility with the Phase 1/2 schema;
-// new code uses ProxyUserID and never stores proxy credentials in this join table.
 type ListenerUser struct {
-	gorm.Model
+	BaseModel
 
 	ListenerID  uint `gorm:"not null;index;uniqueIndex:idx_listener_proxy_user,priority:1" json:"listener_id"`
 	ProxyUserID uint `gorm:"not null;index;uniqueIndex:idx_listener_proxy_user,priority:2" json:"proxy_user_id"`
 
-	// Deprecated legacy fields. They are not used for Phase 6 authentication generation.
+	// Deprecated legacy fields. They are not used for authentication generation.
 	Username string `gorm:"size:100;not null;default:''" json:"-"`
 	Password string `gorm:"type:text;not null;default:''" json:"-"`
 }

backend/internal/database/models/proxy_user.go

@@ -1,15 +1,11 @@
 package models
 
-import (
-	"time"
-
-	"gorm.io/gorm"
-)
+import "time"
 
 // ProxyUser is a user account used to authenticate against Mihomo server nodes.
 // It is deliberately separate from User, which represents a 3m-ui administrator.
 type ProxyUser struct {
-	gorm.Model
+	BaseModel
 
 	Username string `gorm:"size:100;not null;uniqueIndex" json:"username"`
 	// PasswordEncrypted contains an AES-GCM encrypted password. It is never serialized to API responses.
@@ -23,6 +19,4 @@ type ProxyUser struct {
 	Online            bool      `gorm:"not null;default:false" json:"online"`
 	ExpireTime        time.Time `json:"expire_time"`
 	Enabled           bool      `gorm:"not null;default:true" json:"enabled"`
-	// TelegramID links a proxy user to one Telegram account for self-service commands.
-	TelegramID        *int64    `gorm:"uniqueIndex" json:"telegram_id"`
 }

backend/internal/database/models/remote_server.go

@@ -1,16 +1,10 @@
 package models
 
-import (
-	"time"
+import "time"
 
-	"gorm.io/gorm"
-)
-
-// RemoteServer registers an external 3m-ui / Mihomo host managed from this
-// panel. Multi-node is metadata + health check first; full remote config
-// push is a later phase (agent/token based).
+// RemoteServer registers an external 3m-ui / Mihomo host managed from this panel.
 type RemoteServer struct {
-	gorm.Model
+	BaseModel
 
 	Name        string     `gorm:"size:100;not null" json:"name"`
 	BaseURL     string     `gorm:"size:512;not null" json:"base_url"`

backend/internal/database/models/subscription.go

@@ -1,15 +1,11 @@
 package models
 
-import (
-	"time"
-
-	"gorm.io/gorm"
-)
+import "time"
 
 type Subscription struct {
-	gorm.Model
+	BaseModel
 	UserID     uint       `gorm:"not null;index" json:"user_id"`
 	Token      string     `gorm:"uniqueIndex;not null" json:"token"`
-	Format     string     `gorm:"not null" json:"format"` // e.g., "clash", "sing-box"
+	Format     string     `gorm:"not null" json:"format"`
 	ExpireTime *time.Time `json:"expire_time"`
 }