feat: 新增通用导入中心

apps/server/src/imports/entities/import-run.entity.ts

@@ -0,0 +1,40 @@
+import { Column, CreateDateColumn, Entity, Index, PrimaryColumn, UpdateDateColumn } from 'typeorm';
+import type { ImportRunSource, ImportRunStatus, ImportStepKey } from '../imports.types';
+
+@Entity('import_runs')
+@Index('idx_import_runs_user_created', ['userId', 'createdAt'])
+export class ImportRun {
+  @PrimaryColumn({ type: 'varchar', length: 36 })
+  id: string;
+
+  @Column({ name: 'user_id', type: 'integer' })
+  userId: number;
+
+  @Column({ name: 'conversation_id', type: 'integer', nullable: true })
+  conversationId: number | null;
+
+  @Column({ type: 'varchar', length: 10, default: 'manual' })
+  source: ImportRunSource;
+
+  @Column({ name: 'file_name', type: 'varchar', length: 255 })
+  fileName: string;
+
+  /** Serialized sheet data — parsed rows are kept here for v1. */
+  @Column({ name: 'sheets_json', type: 'text' })
+  sheetsJson: string;
+
+  @Column({ type: 'varchar', length: 20, default: 'preparing' })
+  status: ImportRunStatus;
+
+  @Column({ name: 'current_step_key', type: 'varchar', length: 20, nullable: true })
+  currentStepKey: ImportStepKey | null;
+
+  @Column({ type: 'varchar', length: 500, nullable: true })
+  error: string | null;
+
+  @CreateDateColumn({ name: 'created_at' })
+  createdAt: Date;
+
+  @UpdateDateColumn({ name: 'updated_at' })
+  updatedAt: Date;
+}