删除股票相关功能，仅保留用户体系

backend/internal/models/stock.go

@@ -1,44 +0,0 @@
-package models
-
-import (
-	"time"
-
-	"gorm.io/gorm"
-)
-
-// StockDailyQuote 存储每日行情快照（盘后同步）。
-type StockDailyQuote struct {
-	ID           string    `json:"id" gorm:"type:uuid;primaryKey;default:gen_random_uuid()"`
-	Symbol       string    `json:"symbol" gorm:"size:32;not null;uniqueIndex:idx_stock_daily_symbol_date"`
-	Name         string    `json:"name" gorm:"size:128"`
-	TradeDate    time.Time `json:"trade_date" gorm:"type:date;not null;uniqueIndex:idx_stock_daily_symbol_date"`
-	Open         float64   `json:"open"`
-	High         float64   `json:"high"`
-	Low          float64   `json:"low"`
-	Close        float64   `json:"close"`
-	PrevClose    float64   `json:"prev_close"`
-	Volume       int64     `json:"volume"`
-	Amount       float64   `json:"amount"`
-	ChangePct    float64   `json:"change_pct"`
-	TurnoverRate float64   `json:"turnover_rate"`
-	Region       string    `json:"region" gorm:"size:16"`
-	CreatedAt    time.Time `json:"created_at"`
-	UpdatedAt    time.Time `json:"updated_at"`
-}
-
-// StockSyncJob 记录每次盘后同步任务的状态。
-type StockSyncJob struct {
-	ID            string     `json:"id" gorm:"type:uuid;primaryKey;default:gen_random_uuid()"`
-	JobDate       time.Time  `json:"job_date" gorm:"type:date;not null"`
-	Status        string     `json:"status" gorm:"size:16;not null"` // running / success / failed
-	RecordsCount  int        `json:"records_count"`
-	StartedAt     time.Time  `json:"started_at"`
-	FinishedAt    *time.Time `json:"finished_at"`
-	ErrorMessage  string     `json:"error_message"`
-	TriggerBy     string     `json:"trigger_by" gorm:"size:16"` // schedule / manual
-}
-
-// AutoMigrateStock 迁移股票数据表。
-func AutoMigrateStock(db *gorm.DB) error {
-	return db.AutoMigrate(&StockDailyQuote{}, &StockSyncJob{})
-}