feat(call): integrate call handling and WebSocket support

- Added CallHandler and related services for managing call sessions and participants.
- Enhanced WSHandler to support call signaling, including invite, answer, reject, and end functionalities.
- Updated router to include call-related routes for history and ICE server retrieval.
- Introduced WebRTC configuration in the application settings for call management.
- Refactored wire generation to include CallService and CallRepository for improved dependency injection.

internal/repository/call_repo.go

@@ -0,0 +1,156 @@
+package repository
+
+import (
+	"context"
+
+	"carrot_bbs/internal/model"
+
+	"gorm.io/gorm"
+)
+
+// CallRepository 通话仓库接口
+type CallRepository interface {
+	// 通话会话操作
+	CreateCall(call *model.CallSession) error
+	GetCallByID(id string) (*model.CallSession, error)
+	GetCallByIDWithParticipants(id string) (*model.CallSession, error)
+	UpdateCall(call *model.CallSession) error
+	GetActiveCallByConversationID(conversationID string) (*model.CallSession, error)
+
+	// 通话参与者操作
+	CreateCallParticipant(participant *model.CallParticipant) error
+	GetCallParticipant(callID, userID string) (*model.CallParticipant, error)
+	GetCallParticipants(callID string) ([]model.CallParticipant, error)
+	UpdateCallParticipant(participant *model.CallParticipant) error
+
+	// 通话历史
+	GetCallHistory(userID string, page, pageSize int) ([]model.CallSession, int64, error)
+
+	// 事务操作
+	CreateCallWithParticipants(ctx context.Context, call *model.CallSession, participants []*model.CallParticipant) error
+}
+
+// callRepository 通话仓库实现
+type callRepository struct {
+	db *gorm.DB
+}
+
+// NewCallRepository 创建通话仓库
+func NewCallRepository(db *gorm.DB) CallRepository {
+	return &callRepository{db: db}
+}
+
+// CreateCall 创建通话会话
+func (r *callRepository) CreateCall(call *model.CallSession) error {
+	return r.db.Create(call).Error
+}
+
+// GetCallByID 根据ID获取通话会话
+func (r *callRepository) GetCallByID(id string) (*model.CallSession, error) {
+	var call model.CallSession
+	err := r.db.First(&call, "id = ?", id).Error
+	if err != nil {
+		return nil, err
+	}
+	return &call, nil
+}
+
+// GetCallByIDWithParticipants 根据ID获取通话会话（包含参与者）
+func (r *callRepository) GetCallByIDWithParticipants(id string) (*model.CallSession, error) {
+	var call model.CallSession
+	err := r.db.Preload("Participants").First(&call, "id = ?", id).Error
+	if err != nil {
+		return nil, err
+	}
+	return &call, nil
+}
+
+// UpdateCall 更新通话会话
+func (r *callRepository) UpdateCall(call *model.CallSession) error {
+	return r.db.Save(call).Error
+}
+
+// GetActiveCallByConversationID 获取会话中的活跃通话
+func (r *callRepository) GetActiveCallByConversationID(conversationID string) (*model.CallSession, error) {
+	var call model.CallSession
+	err := r.db.Where("conversation_id = ? AND status IN ?", conversationID, []model.CallStatus{
+		model.CallStatusCalling,
+		model.CallStatusConnected,
+	}).First(&call).Error
+	if err != nil {
+		return nil, err
+	}
+	return &call, nil
+}
+
+// CreateCallParticipant 创建通话参与者
+func (r *callRepository) CreateCallParticipant(participant *model.CallParticipant) error {
+	return r.db.Create(participant).Error
+}
+
+// GetCallParticipant 获取通话参与者
+func (r *callRepository) GetCallParticipant(callID, userID string) (*model.CallParticipant, error) {
+	var participant model.CallParticipant
+	err := r.db.Where("call_id = ? AND user_id = ?", callID, userID).First(&participant).Error
+	if err != nil {
+		return nil, err
+	}
+	return &participant, nil
+}
+
+// GetCallParticipants 获取通话参与者列表
+func (r *callRepository) GetCallParticipants(callID string) ([]model.CallParticipant, error) {
+	var participants []model.CallParticipant
+	err := r.db.Where("call_id = ?", callID).Find(&participants).Error
+	if err != nil {
+		return nil, err
+	}
+	return participants, nil
+}
+
+// UpdateCallParticipant 更新通话参与者
+func (r *callRepository) UpdateCallParticipant(participant *model.CallParticipant) error {
+	return r.db.Save(participant).Error
+}
+
+// GetCallHistory 获取用户通话历史
+func (r *callRepository) GetCallHistory(userID string, page, pageSize int) ([]model.CallSession, int64, error) {
+	var calls []model.CallSession
+	var total int64
+
+	// 子查询获取用户参与的通话ID
+	subQuery := r.db.Model(&model.CallParticipant{}).
+		Select("DISTINCT call_id").
+		Where("user_id = ?", userID)
+
+	query := r.db.Model(&model.CallSession{}).
+		Where("id IN (?)", subQuery).
+		Order("created_at DESC")
+
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	offset := (page - 1) * pageSize
+	if err := query.Preload("Participants").Offset(offset).Limit(pageSize).Find(&calls).Error; err != nil {
+		return nil, 0, err
+	}
+
+	return calls, total, nil
+}
+
+// CreateCallWithParticipants 创建通话会话和参与者（事务）
+func (r *callRepository) CreateCallWithParticipants(ctx context.Context, call *model.CallSession, participants []*model.CallParticipant) error {
+	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		if err := tx.Create(call).Error; err != nil {
+			return err
+		}
+		for _, p := range participants {
+			p.CallID = call.ID
+			if err := tx.Create(p).Error; err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}