fix(db): 修复快照查询引擎的 ReferenceError，重构为标准 Drizzle ORM 查询语法

src/actions/snapshots.ts

@@ -3,7 +3,7 @@
 import { db } from '@/db';
 import { portfolioSnapshots } from '@/db/schema';
 import { getPortfolioPositions } from './portfolio';
-import { eq, sql } from 'drizzle-orm';
+import { desc, eq, gte, sql } from 'drizzle-orm';
 import Big from 'big.js';
 
 function getTodayInShanghai(): string {
@@ -89,13 +89,16 @@ export async function getSnapshots(params?: {
   let query = db
     .select()
     .from(portfolioSnapshots)
-    .orderBy(sql`"${date}" DESC`);
+    .orderBy(desc(portfolioSnapshots.date))
+    .$dynamic();
 
   if (startDate) {
-    query = query.where(sql`"${date}" >= ${startDate}`);
+    query = query.where(gte(portfolioSnapshots.date, startDate));
   }
   if (endDate) {
-    query = query.where(sql`"${date}" <= ${endDate}`);
+    query = query.where(
+      portfolioSnapshots.date.lte(endDate)
+    );
   }
 
   const snapshots = await query.limit(limit);